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Observed 9:35 AM MDT at KHLN

Helena Valley Northeast, MT weather

Sunny and 27°−3°, 9°5° colder than a typical Oct 24, freeze watch tonight, low 23°−5°.

Today: low 19°−7° (likely 19°−7° to 30°−1°), high 44°7° (likely 40°4° to 44°7°).

Mostly agree

Now 27°−3°

Sunny · Feels like 23°−5°

Wind
3 mph5 km/h
From the west-southwest. Up to 5 mph8 km/h through 10 PM
Dew point
21°−6°
Dry · up to 32°0° by 11 AM
UV index
1Low
Moderate 1–3 PM · peak 3
Air quality
37Good
Main pollutant: PM2.5 (fine particles)

Next 2 hours

No precipitation expected in the next 2 hours.

Next 48 hours

23°13° cooler than this time yesterday (48°9° then, 25°−4° now)

Good hours for
  • High 43°6° today at 2 PM
  • Hard freeze tonight 9 PM–noon (low 20°−7°)
  • Low 20°−7° tomorrow at 8 AM
  • Above 30°−1° tomorrow by 11 AM
  • Hard freeze tomorrow night from 8 PM (low 20°−7°)
  1. This morningUp to 35°2° by 11 AM · freezing, low 31°−1° · Partly cloudy
  2. This afternoonUp to 43°6° by 2 PM · Clear
  3. TonightDown to 22°−6° by 5 AM · freezing, low 22°−6° · Partly cloudy
  4. Tomorrow morningUp to 31°−1° by 11 AM · freezing, low 20°−7° · Partly cloudy
  5. Tomorrow afternoonUp to 40°4° by 5 PM · Partly cloudy
  6. Tomorrow nightDown to 21°−6° by 5 AM · freezing, low 21°−6° · Mostly cloudy
  7. Monday morningUp to 26°−3° by 9 AM · freezing, low 20°−7° · Mostly cloudy
Hourly forecast, next 48 hours, in the place's local time
HourConditionsTemperatureFeels likePrecipitationWindHumidityCloud coverUV index
Sat 10aSunny31°−1° (likely 28°−2° to 35°2°)27°−3°0%3 mph5 km/h from SE, gusts 11 mph17 km/h98%39%1
Sat 11aSunny35°2° (likely 30°−1° to 37°3°)32°0°0%5 mph8 km/h from SE, gusts 12 mph19 km/h89%39%1
Sat 12pMostly sunny39°4° (likely 34°1° to 39°4°)36°2°0%5 mph8 km/h from SE, gusts 13 mph20 km/h80%32%2
Sat 1pSunny41°5° (likely 36°2° to 41°5°)39°4°0%3 mph5 km/h from SE, gusts 13 mph21 km/h77%9%3
Sat 2pSunny43°6° (likely 38°3° to 43°6°)41°5°0%3 mph5 km/h from SE, gusts 12 mph20 km/h73%6%3
Sat 3pSunny42°6° (likely 40°4° to 44°7°)40°4°0%3 mph5 km/h from SE, gusts 13 mph20 km/h72%1%2
Sat 4pSunny42°6° (likely 40°4° to 44°7°)40°4°0%3 mph5 km/h from ESE, gusts 12 mph20 km/h70%11%1
Sat 5pPartly sunny43°6° (likely 39°4° to 44°7°)41°5°0%3 mph5 km/h from ESE, gusts 12 mph20 km/h66%41%1
Sat 6pMostly clear42°6° (likely 37°3° to 42°6°)42°6°0%2 mph3 km/h from ESE, gusts 11 mph18 km/h67%40%0
Sat 7pMostly clear38°3° (likely 35°2° to 39°4°)38°3°0%2 mph3 km/h from E, gusts 6 mph9 km/h80%48%0
Sat 8pPartly cloudy35°2° (likely 34°1° to 38°3°)35°2°0%1 mph2 km/h from E, gusts 5 mph8 km/h86%48%0
Sat 9pPartly cloudy30°−1° (likely 30°−1° to 35°2°)30°−1°0%2 mph3 km/h from E, gusts 3 mph4 km/h89%33%0
Sat 10pPartly cloudy29°−2° (likely 29°−2° to 35°2°)29°−2°0%1 mph2 km/h from E, gusts 2 mph3 km/h94%19%0
Sat 11pPartly cloudy27°−3° (likely 27°−3° to 34°1°)27°−3°0%1 mph2 km/h from ENE, gusts 2 mph4 km/h99%22%0
Sun 12aClear26°−3° (likely 26°−3° to 33°1°)26°−3°0%1 mph2 km/h from ENE, gusts 3 mph5 km/h99%13%0
Sun 1aPartly cloudy25°−4° (likely 25°−4° to 33°1°)25°−4°0%1 mph2 km/h from NE, gusts 4 mph6 km/h100%17%0
Sun 2aMostly clear25°−4° (likely 25°−4° to 33°1°)25°−4°0%1 mph2 km/h from NE, gusts 4 mph6 km/h100%43%0
Sun 3aMostly clear25°−4° (likely 25°−4° to 33°1°)25°−4°0%2 mph3 km/h from NNE, gusts 5 mph7 km/h100%22%0
Sun 4aMostly clear23°−5° (likely 23°−5° to 33°1°)23°−5°0%2 mph3 km/h from N, gusts 9 mph14 km/h100%21%0
Sun 5aClear22°−6° (likely 22°−6° to 33°1°)22°−6°0%2 mph3 km/h from N, gusts 12 mph20 km/h100%19%0
Sun 6aClear22°−6° (likely 22°−6° to 32°0°)22°−6°0%2 mph3 km/h from NNW, gusts 9 mph14 km/h100%30%0
Sun 7aPartly cloudy21°−6° (likely 21°−6° to 32°0°)21°−6°0%2 mph3 km/h from NNW, gusts 7 mph11 km/h100%53%0
Sun 8aPartly sunny20°−7° (likely 20°−7° to 32°0°)20°−7°0%2 mph3 km/h from NNW, gusts 8 mph12 km/h100%40%0
Sun 9aMostly cloudy24°−4° (likely 24°−4° to 33°1°)24°−4°0%2 mph3 km/h from NW, gusts 11 mph18 km/h100%44%0
Sun 10aMostly cloudy28°−2° (likely 28°−2° to 36°2°)28°−2°0%2 mph3 km/h from NW, gusts 12 mph19 km/h100%46%1
Sun 11aPartly sunny31°−1° (likely 31°−1° to 38°3°)31°−1°0%2 mph3 km/h from NW, gusts 12 mph20 km/h90%39%2
Sun 12pPartly sunny34°1° (likely 34°1° to 40°4°)34°1°0%2 mph3 km/h from NNW, gusts 13 mph21 km/h81%31%3
Sun 1pPartly sunny35°2° (likely 35°2° to 41°5°)35°2°0%2 mph3 km/h from NNW, gusts 13 mph22 km/h80%48%3
Sun 2pPartly sunny38°3° (likely 37°3° to 41°5°)38°3°0%2 mph3 km/h from NNW, gusts 14 mph23 km/h75%44%3
Sun 3pSunny39°4° (likely 38°3° to 42°6°)37°3°0%3 mph5 km/h from NNW, gusts 15 mph24 km/h72%29%3
Sun 4pPartly sunny39°4° (likely 38°3° to 41°5°)37°3°0%3 mph5 km/h from NNW, gusts 15 mph24 km/h69%58%2
Sun 5pPartly sunny40°4° (likely 37°3° to 40°4°)38°3°0%3 mph5 km/h from NNW, gusts 16 mph25 km/h66%50%1
Sun 6pMostly clear38°3° (likely 34°1° to 38°3°)36°2°0%3 mph5 km/h from NNW, gusts 15 mph25 km/h69%42%0
Sun 7pMostly clear35°2° (likely 32°0° to 35°2°)32°0°0%3 mph5 km/h from NNW, gusts 12 mph19 km/h83%58%0
Sun 8pMostly cloudy31°−1° (likely 31°−1° to 33°1°)28°−2°0%3 mph5 km/h from NNW, gusts 9 mph14 km/h90%55%0
Sun 9pPartly cloudy28°−2° (likely 28°−2° to 33°1°)28°−2°0%2 mph3 km/h from NNW, gusts 7 mph10 km/h93%61%0
Sun 10pPartly cloudy26°−3° (likely 26°−3° to 32°0°)26°−3°0%2 mph3 km/h from NNW, gusts 7 mph11 km/h96%76%0
Sun 11pPartly cloudy25°−4° (likely 25°−4° to 32°0°)25°−4°0%2 mph3 km/h from NNW, gusts 5 mph9 km/h99%89%0
Mon 12aCloudy25°−4° (likely 25°−4° to 32°0°)25°−4°0%0 mph0 km/h, gusts 5 mph9 km/h100%91%0
Mon 1aCloudy25°−4° (likely 25°−4° to 32°0°)25°−4°0%0 mph0 km/h, gusts 5 mph7 km/h100%91%0
Mon 2aCloudy24°−4° (likely 24°−4° to 32°0°)24°−4°0%0 mph0 km/h, gusts 4 mph6 km/h100%82%0
Mon 3aCloudy24°−4° (likely 24°−4° to 32°0°)24°−4°0%0 mph0 km/h, gusts 3 mph5 km/h100%86%0
Mon 4aCloudy22°−6° (likely 22°−6° to 32°0°)22°−6°0%0 mph0 km/h, gusts 2 mph3 km/h100%89%0
Mon 5aCloudy21°−6° (likely 21°−6° to 32°0°)21°−6°0%0 mph0 km/h, gusts 2 mph3 km/h100%92%0
Mon 6aCloudy20°−7° (likely 20°−7° to 32°0°)20°−7°0%0 mph0 km/h, gusts 2 mph3 km/h100%91%0
Mon 7aCloudy21°−6° (likely 21°−6° to 32°0°)21°−6°0%0 mph0 km/h, gusts 1 mph2 km/h100%72%0
Mon 8aCloudy23°−5° (likely 23°−5° to 32°0°)23°−5°0%0 mph0 km/h, gusts 1 mph2 km/h100%80%0
Mon 9aCloudy26°−3° (likely 24°−4° to 34°1°)26°−3°0%0 mph0 km/h, gusts 1 mph2 km/h98%90%0

Days ahead

Shaded: typical range for these dates (1991–2020)
  1. Today, Oct 24. Cloudy. High 44°7°, low 19°−7°. Typical 53°12° / 30°−1°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Sunny, 35°2°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 43°6°

      Dry

    3. Evening

      6 PM–midnight

      Partly cloudy, 35°2°

      Dry

    4. Overnight

      midnight–6 AM

      Mostly clear, 22°−6°

      Dry

    Official NWS forecast

    Today: Areas of fog before 11am. Mostly sunny, with a high near 44. Southeast wind around 5 mph.

    Tonight: Partly cloudy. Low around 19, with temperatures rising to around 22 overnight. East northeast wind around 2 mph.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    40°4°–44°7°
    Low, likely
    19°−7°–30°−1°
    Typical high / low
    53°12° / 30°−1°
    Wind
    13 mph20 km/h
    UV peak
    4
  2. Tomorrow, Oct 25. Partly sunny. High 41°5°, low 19°−7°. Typical 53°12° / 30°−1°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Mostly cloudy, 20°−7°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 40°4°

      Dry

    3. Evening

      6 PM–midnight

      Partly cloudy, 31°−1°

      Dry

    4. Overnight

      midnight–6 AM

      Cloudy, 21°−6°

      Dry

    Official NWS forecast

    Day: Mostly sunny, with a high near 41. North northwest wind around 3 mph.

    Night: Mostly cloudy, with a low around 19. North northwest wind 0 to 3 mph.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    38°3°–42°6°
    Low, likely
    19°−7°–32°0°
    Typical high / low
    53°12° / 30°−1°
    Wind
    15 mph24 km/h
    UV peak
    3
  3. Monday, Oct 26. Partly sunny. High 48°9°, low 25°−4°. Typical 52°11° / 30°−1°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 23°−5°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 50°10°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 39°4°

      30% chance

    4. Overnight

      midnight–6 AM

      Cloudy, 36°2°

      30% chance · 0.05 in1.3 mm

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Mostly sunny, with a high near 48. Southeast wind around 1 mph.

    Night: A chance of rain before 3am, then a slight chance of snow. Mostly cloudy, with a low around 25. South southwest wind around 3 mph. Chance of precipitation is 30%.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    45°7°–53°12°
    Low, likely
    25°−4°–31°−1°
    Typical high / low
    52°11° / 30°−1°
    Wind
    5 mph7 km/h, gusts 11 mph18 km/h
    UV peak
    3
  4. Tuesday, Oct 27. Rain. High 49°9°, low 23°−5°. Typical 52°11° / 29°−2°. Rain 0.08 in2 mm, 40% chance. Mostly agree.
    1. Morning

      6 AM–noon

      Drizzle, 38°3°

      30% chance · 0.02 in0.5 mm

    2. Afternoon

      noon–6 PM

      Cloudy, 49°10°

      30% chance

    3. Evening

      6 PM–midnight

      Cloudy, 40°5°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 32°0°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: A chance of rain. Partly sunny, with a high near 49. Southwest wind 1 to 5 mph.

    Night: A chance of rain before 3am, then a chance of snow. Mostly cloudy, with a low around 23. West wind 3 to 7 mph. Little or no snow accumulation expected.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    48°9°–51°11°
    Low, likely
    23°−5°–38°3°
    Typical high / low
    52°11° / 29°−2°
    Wind
    14 mph22 km/h, gusts 29 mph47 km/h
    UV peak
    2
  5. Wednesday, Oct 28. Snow. High 46°8°, low 20°−7°. Typical 51°11° / 29°−2°. Snow, 20% chance. Mostly agree.
    1. Morning

      6 AM–noon

      Mostly sunny, 31°−1°

      Dry

    2. Afternoon

      noon–6 PM

      Mostly sunny, 50°10°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 41°5°

      Dry

    4. Overnight

      midnight–6 AM

      Partly cloudy, 32°0°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: A slight chance of snow before 3pm, then a slight chance of rain and snow. Mostly sunny, with a high near 46.

    Night: A slight chance of snow. Partly cloudy, with a low around 20.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    46°8°–51°11°
    Low, likely
    20°−7°–33°1°
    Typical high / low
    51°11° / 29°−2°
    Wind
    11 mph17 km/h, gusts 23 mph37 km/h
    UV peak
    3
  6. Thursday, Oct 29. Snow. High 44°7°, low 20°−7°. Typical 51°11° / 28°−2°. Snow 0.01 in0.3 mm, 20% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 32°0°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 44°7°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 37°3°

      30% chance · 0.01 in0.3 mm

    4. Overnight

      midnight–6 AM

      Partly cloudy, 31°−1°

      30% chance · 0.02 in0.4 mm

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: A slight chance of snow before noon. Partly sunny, with a high near 44.

    Night: A slight chance of snow. Mostly cloudy, with a low around 20.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    39°4°–50°10°
    Low, likely
    20°−7°–32°0°
    Typical high / low
    51°11° / 28°−2°
    Wind
    12 mph19 km/h, gusts 17 mph27 km/h
    UV peak
    3
  7. Friday, Oct 30. Snow. High 47°8°, low 22°−6°. Typical 50°10° / 28°−2°. Snow 0–2 in0–5 cm, 20% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 32°0°

      30% chance · 0.2 in0.5 cm

    2. Afternoon

      noon–6 PM

      Drizzle, 37°3°

      30% chance · 0.04 in1 mm

    3. Evening

      6 PM–midnight

      Cloudy, 34°1°

      20% chance · 0.2 in0.4 cm

    4. Overnight

      midnight–6 AM

      Cloudy, 30°−1°

      20% chance · 0.01 in0.3 mm

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: A slight chance of snow before noon. Partly sunny, with a high near 47.

    Night: A slight chance of rain and snow. Partly cloudy, with a low around 22.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    35°2°–47°8°
    Low, likely
    22°−6°–34°1°
    Typical high / low
    50°10° / 28°−2°
    Wind
    10 mph16 km/h, gusts 20 mph33 km/h
    UV peak
    2
  8. Saturday, Oct 31. Cloudy. High 40°4°, low 28°−2°. Typical 50°10° / 28°−2°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 30°−1°

      Dry

    2. Afternoon

      noon–6 PM

      Partly sunny, 38°3°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 32°0°

      Dry

    4. Overnight

      midnight–6 AM

      Mostly clear, 28°−2°

      Dry

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    34°1°–45°7°
    Low, likely
    24°−4°–31°−1°
    Typical high / low
    50°10° / 28°−2°
    Wind
    16 mph26 km/h, gusts 21 mph34 km/h
    UV peak
    3
  9. Sunday, Nov 1. Cloudy. High 43°6°, low 29°−2°. Typical 49°9° / 27°−3°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 29°−2°

      Dry

    2. Afternoon

      noon–6 PM

      Mostly sunny, 43°6°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 37°3°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 33°1°

      Dry

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    38°3°–50°10°
    Low, likely
    22°−6°–32°0°
    Typical high / low
    49°9° / 27°−3°
    Wind
    11 mph18 km/h, gusts 29 mph47 km/h
    UV peak
    3
  10. Monday, Nov 2. Cloudy. High 47°8°, low 31°−1°. Typical 49°9° / 27°−3°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 38°3°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 50°10°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 39°4°

      Dry

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    41°5°–54°12°
    Low, likely
    28°−2°–33°1°
    Typical high / low
    49°9° / 27°−3°
    Wind
    6 mph10 km/h, gusts 14 mph22 km/h
    UV peak
    3

The outlook

  1. Today

    Dry, high 44°, low 19°.

  2. Tomorrow

    Dry, high 41°, low 19°, cooling off.

  3. Monday

    Dry, high 48°, low 25°, warming up.

  4. Rest of week

    Highs 40–49°; chance of precipitation on Tuesday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (TFX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue
Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Missouri River below Hauser Dam near Helena

4.7 mi
Level
3.5 ft

Reading from Sat 8 AM · NWS gauge page

Missouri River at Helena Valley Reservoir

5.4 mi
Below flood stage
Level
3818 ft

Reading from Sat 8:15 AM · NWS gauge page

Tenmile Creek (MT) near Helena

10 mi
Below flood stage
Level
2.8 ft
Flow
52 cfs

Reading from Sat 8:15 AM · NWS gauge page

Missouri River at Canyon Ferry Reservoir

11 mi
Below flood stage
Level
3785 ft

Reading from Sat 8 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Pipes: watch the cold

Tonight’s low: 23°−5°

Overnight low near 23°F — not yet at drip-the-faucets cold, but worth watching if it's forecast to drop further.

Heating this week

About 60% less heating than a typical week.

This week 68Typical 172

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F
47
h below 17°F
0
h below 5°F
0

47, 17 and 5°F are the test points heat pumps are rated at. About 13 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 21°F). Indoor air will run dry too — a humidifier keeping indoor relative humidity in the 30–50% range is more comfortable and cuts static shocks, without going so high it fogs cold windows.

Open the windows?

No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.

Is this typical?

Helena Airport Asos · official normals 1991–2020 · records 1880–2026

Oct 24, today vs a typical year

Today’s expected high is 9°5° colder than typical.

Normal high / low
53°12° / 30°−1°
Forecast high / low
44°7° / 19°−7°
Record high
72°22° in 1959
Record low
−1°−18° in 1919

Last 7 days vs normal

On average 5°3° warmer than normal (daily mean temperature).

  1. +6°+3°SunOct 18
  2. +5°+3°MonOct 19
  3. +6°+3°TueOct 20
  4. +5°+3°WedOct 21
  5. +8°+4°ThuOct 22
  6. −1°FriOct 23
  7. —SatOct 24

Helena Valley Northeast weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Sunrise 7:58 AM, sunset 6:24 PM.

Daylight
10 h 26 min
Losing 3 min 8 s a day; shortest Dec 21, 1 h 53 min less
Golden hour
5:42–6:43 PM
Morning 7:39–8:41 AM
Blue hour
6:43–6:55 PM
Morning 7:27–7:39 AM; first light 7:27 AM

Stars tonight? Fair

Mostly clear 10 PM–2 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today
sets 6:12 AM · rises 5:25 PM
Full moon
Oct 25
New moon
Nov 9
Looking south from Helena Valley Northeast. The highest point on the skyline is about 9,500 ft, 72 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.