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Observed 2:30 PM MDT at KHLN

Montana City, MT weather

Sunny and 41°5°, 12°7° colder than a typical Oct 24, freeze watch tonight, low 23°−5°.

Today: low 23°−5° (likely 18°−8° to 26°−3°), high 41°5° (likely 41°5° to 42°6°).

Forecasts agree

Now 41°5°

Sunny · Feels like 38°3°

Wind
5 mph7 km/h
From the east. Up to 5 mph8 km/h through 2 AM
Dew point
28°−2°
Dry, static shocks likely
UV index
3Moderate
Moderate until 5 PM · peak 4
Air quality
52Moderate
Main pollutant: PM2.5 (fine particles)

Next 2 hours

No precipitation expected in the next 2 hours.

Next 48 hours

Good hours for
  • High 41°5° today at 3 PM
  • Hard freeze tonight 8–1 PM (low 23°−5°)
  • Fog tomorrow 8 AM–noon
  • Above 30°−1° tomorrow by noon
  • Hard freeze tomorrow night 7 PM–noon (low 23°−5°)
  1. This afternoonNear 40°4° · Clear
  2. TonightDown to 25°−4° by 5 AM · freezing, low 25°−4° · Clear
  3. Tomorrow morningUp to 29°−2° by 11 AM · Partly cloudy · freezing, low 23°−5°
  4. Tomorrow afternoonUp to 38°3° by 4 PM · freezing, low 30°−1° · Mostly cloudy
  5. Tomorrow nightDown to 24°−4° by 4 AM · freezing, low 24°−4° · Mostly cloudy
  6. Monday morningUp to 32°0° by 11 AM · freezing, low 23°−5° · Mostly cloudy
Hourly forecast, next 48 hours, in the place's local time
HourConditionsTemperatureFeels likePrecipitationWindHumidityCloud coverUV index
Sat 2pSunny39°4° (likely 38°3° to 41°5°)36°2°0%5 mph8 km/h from ESE, gusts 6 mph9 km/h75%12%4
Sat 3pSunny41°5° (likely 39°4° to 42°6°)38°3°0%5 mph8 km/h from E, gusts 6 mph10 km/h72%10%3
Sat 4pSunny41°5° (likely 39°4° to 42°6°)39°4°0%3 mph5 km/h from ENE, gusts 6 mph10 km/h72%7%3
Sat 5pMostly sunny41°5° (likely 37°3° to 42°6°)41°5°0%2 mph3 km/h from ENE, gusts 5 mph8 km/h72%5%1
Sat 6pClear37°3° (likely 33°1° to 39°4°)37°3°0%2 mph3 km/h from W, gusts 4 mph6 km/h81%6%1
Sat 7pClear35°2° (likely 30°−1° to 36°2°)35°2°0%2 mph3 km/h from SW, gusts 4 mph7 km/h86%10%0
Sat 8pClear32°0° (likely 28°−2° to 35°2°)29°−2°0%3 mph5 km/h from SSW, gusts 2 mph3 km/h86%10%0
Sat 9pMostly clear31°−1° (likely 27°−3° to 34°1°)26°−3°0%5 mph8 km/h from S, gusts 3 mph4 km/h85%21%0
Sat 10pPartly cloudy30°−1° (likely 26°−3° to 34°1°)26°−3°0%3 mph5 km/h from SSW, gusts 3 mph5 km/h86%37%0
Sat 11pClear29°−2° (likely 26°−3° to 33°1°)29°−2°0%2 mph3 km/h from S, gusts 4 mph6 km/h87%21%0
Sun 12aClear28°−2° (likely 26°−3° to 33°1°)28°−2°0%2 mph3 km/h from SSW, gusts 3 mph6 km/h86%5%0
Sun 1aMostly clear28°−2° (likely 26°−3° to 33°1°)28°−2°0%1 mph2 km/h from WSW, gusts 4 mph6 km/h83%12%0
Sun 2aClear27°−3° (likely 25°−4° to 33°1°)27°−3°0%1 mph2 km/h from WSW, gusts 3 mph5 km/h85%9%0
Sun 3aClear27°−3° (likely 25°−4° to 33°1°)27°−3°0%1 mph2 km/h from W, gusts 4 mph6 km/h87%5%0
Sun 4aClear26°−3° (likely 23°−5° to 33°1°)26°−3°0%1 mph2 km/h from NNW, gusts 3 mph5 km/h86%18%0
Sun 5aClear25°−4° (likely 24°−4° to 32°0°)25°−4°0%1 mph2 km/h from NW, gusts 3 mph5 km/h90%21%0
Sun 6aClear25°−4° (likely 24°−4° to 33°1°)25°−4°0%2 mph3 km/h from NW, gusts 4 mph6 km/h95%22%0
Sun 7aClear24°−4° (likely 24°−4° to 32°0°)24°−4°0%2 mph3 km/h from NW, gusts 7 mph11 km/h93%29%0
Sun 8aFog23°−5° (likely 23°−5° to 32°0°)23°−5°0%2 mph3 km/h from NW, gusts 7 mph11 km/h96%40%0
Sun 9aFog24°−4° (likely 24°−4° to 32°0°)20°−7°0%3 mph5 km/h from NW, gusts 7 mph11 km/h100%52%0
Sun 10aFog26°−3° (likely 26°−3° to 33°1°)26°−3°0%2 mph3 km/h from NW, gusts 7 mph12 km/h100%60%1
Sun 11aFog29°−2° (likely 29°−2° to 35°2°)25°−4°0%3 mph5 km/h from NNW, gusts 8 mph12 km/h94%69%2
Sun 12pPartly sunny30°−1° (likely 30°−1° to 36°2°)26°−3°0%3 mph5 km/h from NNW, gusts 8 mph13 km/h92%87%3
Sun 1pCloudy34°1° (likely 33°1° to 37°3°)31°−1°0%3 mph5 km/h from NNW, gusts 8 mph13 km/h82%93%3
Sun 2pCloudy36°2° (likely 34°1° to 38°3°)33°1°0%3 mph5 km/h from N, gusts 8 mph13 km/h80%85%3
Sun 3pMostly sunny37°3° (likely 35°2° to 38°3°)34°1°0%3 mph5 km/h from N, gusts 8 mph13 km/h75%57%3
Sun 4pMostly sunny38°3° (likely 35°2° to 38°3°)36°2°0%3 mph5 km/h from N, gusts 9 mph14 km/h75%68%2
Sun 5pMostly sunny37°3° (likely 33°1° to 38°3°)34°1°0%3 mph5 km/h from NNW, gusts 8 mph13 km/h75%73%1
Sun 6pMostly cloudy34°1° (likely 30°−1° to 37°3°)34°1°0%2 mph3 km/h from WNW, gusts 9 mph14 km/h80%77%0
Sun 7pCloudy32°0° (likely 28°−2° to 34°1°)32°0°0%2 mph3 km/h from WNW, gusts 9 mph14 km/h84%73%0
Sun 8pCloudy29°−2° (likely 27°−3° to 33°1°)29°−2°0%2 mph3 km/h from WNW, gusts 7 mph11 km/h88%70%0
Sun 9pCloudy28°−2° (likely 26°−3° to 32°0°)28°−2°0%2 mph3 km/h from WSW, gusts 7 mph11 km/h89%73%0
Sun 10pCloudy27°−3° (likely 25°−4° to 31°−1°)27°−3°0%2 mph3 km/h from WSW, gusts 6 mph9 km/h92%79%0
Sun 11pCloudy27°−3° (likely 25°−4° to 31°−1°)27°−3°0%2 mph3 km/h from WSW, gusts 5 mph8 km/h93%89%0
Mon 12aCloudy26°−3° (likely 25°−4° to 32°0°)26°−3°0%1 mph2 km/h from SW, gusts 4 mph7 km/h93%92%0
Mon 1aCloudy26°−3° (likely 24°−4° to 32°0°)26°−3°0%1 mph2 km/h from SW, gusts 4 mph6 km/h88%80%0
Mon 2aCloudy26°−3° (likely 24°−4° to 31°−1°)26°−3°0%1 mph2 km/h from SW, gusts 4 mph6 km/h89%81%0
Mon 3aCloudy25°−4° (likely 24°−4° to 32°0°)25°−4°0%2 mph3 km/h from SSW, gusts 3 mph6 km/h91%87%0
Mon 4aCloudy24°−4° (likely 24°−4° to 32°0°)24°−4°0%2 mph3 km/h from SSW, gusts 3 mph5 km/h90%84%0
Mon 5aCloudy24°−4° (likely 24°−4° to 31°−1°)24°−4°0%2 mph3 km/h from SSW, gusts 3 mph5 km/h93%88%0
Mon 6aCloudy23°−5° (likely 23°−5° to 31°−1°)23°−5°0%2 mph3 km/h from S, gusts 2 mph4 km/h95%77%0
Mon 7aMostly cloudy24°−4° (likely 24°−4° to 31°−1°)24°−4°0%2 mph3 km/h from S, gusts 2 mph3 km/h92%61%0
Mon 8aCloudy24°−4° (likely 24°−4° to 31°−1°)24°−4°0%2 mph3 km/h from S, gusts 2 mph3 km/h94%74%0
Mon 9aPartly sunny24°−4° (likely 24°−4° to 32°0°)20°−7°0%3 mph5 km/h from SSE, gusts 3 mph4 km/h97%54%0
Mon 10aPartly sunny28°−2° (likely 28°−2° to 36°2°)24°−4°0%3 mph5 km/h from SSE, gusts 3 mph4 km/h96%57%1
Mon 11aCloudy32°0° (likely 32°0° to 40°4°)29°−2°0%3 mph5 km/h from SSE, gusts 4 mph6 km/h92%85%2
Mon 12pMostly sunny37°3° (likely 37°3° to 42°6°)34°1°0%3 mph5 km/h from ESE, gusts 4 mph7 km/h87%65%3
Mon 1pPartly sunny41°5° (likely 41°5° to 46°8°)39°4°0%3 mph5 km/h from ESE, gusts 6 mph9 km/h79%46%3

Days ahead

Shaded: typical range for these dates (1991–2020)
  1. Today, Oct 24. Mostly sunny. High 41°5°, low 23°−5°. Typical 53°12° / 30°−1°. Dry. Forecasts agree.
    1. Afternoon

      noon–6 PM

      Sunny, 41°5°

      Dry

    2. Evening

      6 PM–midnight

      Mostly clear, 32°0°

      Dry

    3. Overnight

      midnight–6 AM

      Clear, 25°−4°

      Dry

    Official NWS forecast

    Today: Sunny, with a high near 41. East wind around 5 mph.

    Tonight: Mostly clear, with a low around 23. West southwest wind 1 to 5 mph.

    Forecasts agreeIndependent forecasts are close; the range is narrow.

    High, likely
    41°5°–42°6°
    Low, likely
    18°−8°–26°−3°
    Typical high / low
    53°12° / 30°−1°
    Wind
    10 mph15 km/h, gusts 15 mph24 km/h
    UV peak
    4
  2. Tomorrow, Oct 25. Cloudy. High 38°3°, low 22°−6°. Typical 53°12° / 30°−1°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Fog, 23°−5°

      Dry

    2. Afternoon

      noon–6 PM

      Mostly sunny, 38°3°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 29°−2°

      Dry

    4. Overnight

      midnight–6 AM

      Cloudy, 24°−4°

      Dry

    Official NWS forecast

    Day: Areas of fog before noon. Mostly sunny, with a high near 38. North northwest wind around 3 mph.

    Night: Mostly cloudy, with a low around 22. West southwest wind around 2 mph.

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

    High, likely
    35°2°–38°3°
    Low, likely
    22°−6°–31°−1°
    Typical high / low
    53°12° / 30°−1°
    Wind
    8 mph13 km/h
    UV peak
    3
  3. Monday, Oct 26. Partly sunny. High 46°8°, low 30°−1°. Typical 52°11° / 30°−1°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Partly sunny, 24°−4°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 48°9°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 38°3°

      30% chance

    4. Overnight

      midnight–6 AM

      Drizzle, 37°3°

      40% chance · 0.09 in2.2 mm

    Official NWS forecast

    Day: Mostly sunny, with a high near 46. Southeast wind around 5 mph.

    Night: A chance of rain before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 30. South wind around 5 mph. Chance of precipitation is 40%.

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

    High, likely
    45°7°–50°10°
    Low, likely
    22°−6°–31°−1°
    Typical high / low
    52°11° / 30°−1°
    Wind
    6 mph9 km/h, gusts 12 mph19 km/h
    UV peak
    4
  4. Tuesday, Oct 27. Drizzle. High 45°7°, low 26°−3°. Typical 52°11° / 29°−2°. Rain 0.11 in2.8 mm, 50% chance. Mostly agree.
    1. Morning

      6 AM–noon

      Drizzle, 38°3°

      40% chance · 0.02 in0.5 mm

    2. Afternoon

      noon–6 PM

      Drizzle, 47°8°

      30% chance

    3. Evening

      6 PM–midnight

      Cloudy, 38°3°

      20% chance

    4. Overnight

      midnight–6 AM

      Mostly clear, 32°0°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: A chance of rain and snow. Mostly cloudy, with a high near 45. West southwest wind 3 to 10 mph, with gusts as high as 20 mph. Little or no snow accumulation expected.

    Night: A slight chance of rain before midnight. Mostly cloudy, with a low around 26. Southwest wind 5 to 9 mph.

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

    High, likely
    44°7°–48°9°
    Low, likely
    26°−3°–34°1°
    Typical high / low
    52°11° / 29°−2°
    Wind
    18 mph29 km/h, gusts 26 mph42 km/h
    UV peak
    3
  5. Wednesday, Oct 28. Partly sunny. High 45°7°, low 26°−3°. Typical 51°11° / 29°−2°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Sunny, 31°−1°

      Dry

    2. Afternoon

      noon–6 PM

      Partly sunny, 47°8°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 38°3°

      Dry

    4. Overnight

      midnight–6 AM

      Mostly clear, 30°−1°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Mostly sunny, with a high near 45.

    Night: Partly cloudy, with a low around 26.

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

    High, likely
    45°7°–49°9°
    Low, likely
    26°−3°–32°0°
    Typical high / low
    51°11° / 29°−2°
    Wind
    10 mph16 km/h, gusts 26 mph42 km/h
    UV peak
    3
  6. Thursday, Oct 29. Mostly cloudy. High 42°6°, low 25°−4°. Typical 51°11° / 28°−2°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Partly sunny, 30°−1°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 45°7°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 36°2°

      30% chance · 0.01 in0.4 mm

    4. Overnight

      midnight–6 AM

      Snow, 29°−2°

      30% chance · 0.1 in0.4 cm

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Partly sunny, with a high near 42.

    Night: A slight chance of snow before 9pm, then a chance of rain and snow. Mostly cloudy, with a low around 25.

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

    High, likely
    39°4°–48°9°
    Low, likely
    25°−4°–30°−1°
    Typical high / low
    51°11° / 28°−2°
    Wind
    7 mph11 km/h, gusts 15 mph24 km/h
    UV peak
    3
  7. Friday, Oct 30. Snow. High 42°6°, low 24°−4°. Typical 50°10° / 28°−2°. Snow 0–2 in0–5 cm, 30% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 29°−2°

      30% chance · 0.2 in0.4 cm

    2. Afternoon

      noon–6 PM

      Drizzle, 36°2°

      30% chance · 0.02 in0.4 mm

    3. Evening

      6 PM–midnight

      Snow, 31°−1°

      20% chance · 0.05 in1.2 mm

    4. Overnight

      midnight–6 AM

      Snow, 27°−3°

      20% chance · 0.02 in0.4 mm

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: A chance of snow before 3pm, then a slight chance of rain and snow. Partly sunny, with a high near 42.

    Night: A slight chance of rain and snow. Mostly cloudy, with a low around 24.

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

    High, likely
    32°0°–42°6°
    Low, likely
    24°−4°–30°−1°
    Typical high / low
    50°10° / 28°−2°
    Wind
    5 mph8 km/h, gusts 17 mph27 km/h
    UV peak
    2
  8. Saturday, Oct 31. Snow. High 37°3°, low 25°−4°. Typical 50°10° / 28°−2°. Snow 0.03 in0.8 mm, 20% chance. Mostly agree.
    1. Morning

      6 AM–noon

      Cloudy, 27°−3°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 36°2°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 30°−1°

      Dry

    4. Overnight

      midnight–6 AM

      Cloudy, 29°−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.

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

    High, likely
    34°1°–41°5°
    Low, likely
    18°−8°–30°−1°
    Typical high / low
    50°10° / 28°−2°
    Wind
    14 mph23 km/h, gusts 23 mph37 km/h
    UV peak
    3
  9. Sunday, Nov 1. Cloudy. High 42°6°, low 27°−3°. Typical 49°9° / 27°−3°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Mostly sunny, 32°0°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 43°6°

      Dry

    3. Evening

      6 PM–midnight

      Mostly clear, 37°3°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 34°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°–47°8°
    Low, likely
    26°−3°–31°−1°
    Typical high / low
    49°9° / 27°−3°
    Wind
    15 mph24 km/h, gusts 32 mph51 km/h
    UV peak
    3
  10. Monday, Nov 2. Cloudy. High 44°7°, low 30°−1°. Typical 49°9° / 27°−3°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 37°3°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 44°7°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 36°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
    37°3°–52°11°
    Low, likely
    28°−2°–33°1°
    Typical high / low
    49°9° / 27°−3°
    Wind
    9 mph15 km/h, gusts 41 mph66 km/h
    UV peak
    2

The outlook

  1. Today

    Dry, high 41°, low 23°.

  2. Tomorrow

    Dry, high 38°, low 22°, cooling off.

  3. Monday

    Dry, high 46°, low 30°, warming up.

  4. Rest of week

    Highs 37–45°; 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

Prickly Pear Creek near Clancy

0.7 mi
Level
0.9 ft
Flow
40 cfs

Reading from Sat 12:30 PM · NWS gauge page

Missouri River at Helena Valley Reservoir

8.2 mi
Below flood stage
Level
3818 ft

Reading from Sat 1:15 PM · NWS gauge page

Tenmile Creek (MT) near Helena

9.3 mi
Below flood stage
Level
2.7 ft
Flow
47 cfs

Reading from Sat 1:15 PM · NWS gauge page

Missouri River at Canyon Ferry Reservoir

13 mi
Below flood stage
Level
3785 ft

Reading from Sat 1 PM · 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 69Typical 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 19 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 28°F).

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 12°7° colder than typical.

Normal high / low
53°12° / 30°−1°
Forecast high / low
41°5° / 23°−5°
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

Montana City weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

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

Daylight
10 h 27 min
Losing 3 min 8 s a day; shortest Dec 21, 1 h 52 min less
Golden hour
5:42–6:44 PM
Morning 7:39–8:40 AM
Blue hour
6:44–6:55 PM
Morning 7:27–7:39 AM; first light 7:27 AM

Stars tonight? Fair

Mostly clear 11 PM–7 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today
sets 6:12 AM · rises 5:25 PM
Full moon
Oct 25
New moon
Nov 9
Looking southeast from Montana City. The highest point on the skyline is about 8,900 ft, 29 mi away.Skyline from USGS elevation data, heights drawn up to 2.5× taller. Sky, sun and moon as they are now.