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Observed 10:56 AM MDT at KFNL

Johnstown, CO weather

Overcast and 46°8°, 9°5° colder than a typical Oct 24, rain ~6–8 PM (50%).

Today: low 38°3° (likely 38°3° to 47°8°), high 53°12° (likely 53°12° to 58°14°).

Mostly agree

Now 46°8°

Cloudy · Feels like 41°5°

Feels like
41°5°
Wind chill from 10 mph17 km/h wind · air 46°8°
Wind
10 mph17 km/h
From the east. 58–10 mph17 km/h through 11 PM
Dew point
32°0°
Dry, static shocks likely
UV index
3Moderate
Moderate until 3 PM · peak 4
Air quality
33Good
Main pollutant: Ozone
Pressure
30.38 inHg1029 hPa
Rising · +0.07 inHg+2.5 hPa in 3 h

Next 2 hours

No precipitation expected in the next 2 hours.

Next 48 hours

20°11° cooler than this time yesterday (66°19° then, 46°8° now)

Good hours for
  • Dry until 6 PM
  • High 53°12° today at 3 PM
  • Rain tonight 6 PM–midnight (50%, 0.18 in4.6 mm)
  • Low 39°4° tomorrow at 6 AM
  • Rain tomorrow night from 6 PM (70%, 0.95 in24 mm)
  1. This afternoonUp to 53°12° by 3 PM · rain chance 10% · Mostly cloudy
  2. TonightDown to 41°5° by 3 AM · Rain 6 PM–midnight (50%)
  3. Tomorrow morningUp to 47°8° by 11 AM · Mostly cloudy
  4. Tomorrow afternoonUp to 55°13° by 4 PM · rain chance 20% · Partly cloudy
  5. Tomorrow nightDown to 44°7° by 4 AM · Rain all night (70%)
  6. Monday morningUp to 48°9° by 10 AM · Rain all morning (30%)
Hourly forecast, next 48 hours, in the place's local time
HourConditionsTemperatureFeels likePrecipitationWindHumidityCloud coverUV index
Sat 11aMostly cloudy45°7° (likely 45°7° to 52°11°)39°4°5%12 mph19 km/h from NNE, gusts 13 mph22 km/h70%46%3
Sat 12pMostly cloudy47°8° (likely 47°8° to 53°12°)42°6°10%10 mph16 km/h from NE, gusts 13 mph21 km/h60%44%4
Sat 1pMostly cloudy50°10° (likely 50°10° to 55°13°)46°8°10%9 mph14 km/h from NE, gusts 12 mph19 km/h54%70%4
Sat 2pCloudy52°11° (likely 52°11° to 57°14°)52°11°10%8 mph13 km/h from ENE, gusts 11 mph18 km/h48%82%3
Sat 3pCloudy53°12° (likely 53°12° to 57°14°)53°12°10%8 mph13 km/h from ENE, gusts 11 mph18 km/h46%87%2
Sat 4pCloudy53°12° (likely 53°12° to 56°13°)53°12°10%8 mph13 km/h from E, gusts 12 mph19 km/h46%92%1
Sat 5pCloudy52°11° (likely 52°11° to 55°13°)52°11°10%8 mph13 km/h from E, gusts 11 mph18 km/h50%97%0
Sat 6pCloudy51°11° (likely 50°10° to 54°12°)51°11°50%, 0.03 in0.8 mm8 mph13 km/h from ESE, gusts 13 mph20 km/h54%93%0
Sat 7pShowers49°9° (likely 47°8° to 52°11°)46°8°50%, 0.03 in0.8 mm7 mph11 km/h from ESE, gusts 14 mph23 km/h61%95%0
Sat 8pCloudy48°9° (likely 45°7° to 50°10°)45°7°50%, 0.03 in0.8 mm6 mph10 km/h from ESE, gusts 14 mph22 km/h66%96%0
Sat 9pCloudy47°8° (likely 44°7° to 48°9°)44°7°30%, 0.03 in0.8 mm6 mph10 km/h from ESE, gusts 12 mph20 km/h68%96%0
Sat 10pCloudy46°8° (likely 44°7° to 47°8°)43°6°30%, 0.03 in0.8 mm6 mph10 km/h from ESE, gusts 9 mph14 km/h73%92%0
Sat 11pPartly cloudy45°7° (likely 43°6° to 47°8°)43°6°30%, 0.03 in0.8 mm5 mph8 km/h from ESE, gusts 8 mph13 km/h76%76%0
Sun 12aCloudy44°7° (likely 42°6° to 46°8°)41°5°5%6 mph10 km/h from ESE, gusts 9 mph14 km/h78%78%0
Sun 1aCloudy43°6° (likely 40°4° to 45°7°)40°4°5%6 mph10 km/h from ESE, gusts 11 mph17 km/h81%79%0
Sun 2aCloudy43°6° (likely 40°4° to 44°7°)40°4°5%5 mph8 km/h from ESE, gusts 9 mph14 km/h84%84%0
Sun 3aCloudy41°5° (likely 39°4° to 43°6°)38°3°5%5 mph8 km/h from ESE, gusts 8 mph13 km/h90%81%0
Sun 4aCloudy41°5° (likely 39°4° to 42°6°)38°3°5%5 mph8 km/h from E, gusts 7 mph11 km/h89%84%0
Sun 5aCloudy41°5° (likely 38°3° to 41°5°)38°3°5%5 mph8 km/h from E, gusts 8 mph13 km/h89%82%0
Sun 6aCloudy39°4° (likely 37°3° to 41°5°)36°2°0%5 mph8 km/h from E, gusts 8 mph13 km/h96%83%0
Sun 7aCloudy39°4° (likely 37°3° to 41°5°)37°3°0%3 mph5 km/h from E, gusts 9 mph15 km/h96%52%0
Sun 8aCloudy40°4° (likely 37°3° to 42°6°)36°2°0%5 mph8 km/h from ENE, gusts 8 mph13 km/h98%62%0
Sun 9aCloudy42°6° (likely 40°4° to 44°7°)38°3°5%6 mph10 km/h from E, gusts 8 mph14 km/h97%68%1
Sun 10aCloudy45°7° (likely 43°6° to 46°8°)43°6°5%5 mph8 km/h from ENE, gusts 8 mph12 km/h88%81%2
Sun 11aCloudy47°8° (likely 45°7° to 50°10°)45°7°5%5 mph8 km/h from ENE, gusts 7 mph11 km/h83%91%3
Sun 12pCloudy49°9° (likely 48°9° to 52°11°)48°9°10%3 mph5 km/h from ENE, gusts 7 mph11 km/h78%87%4
Sun 1pMostly cloudy52°11° (likely 51°11° to 56°13°)52°11°10%5 mph8 km/h from NE, gusts 8 mph13 km/h68%48%5
Sun 2pMostly cloudy53°12° (likely 53°12° to 58°14°)53°12°10%5 mph8 km/h from NNE, gusts 8 mph13 km/h65%54%5
Sun 3pShowers54°12° (likely 54°12° to 60°16°)54°12°20%6 mph10 km/h from NNE, gusts 9 mph14 km/h64%35%4
Sun 4pShowers55°13° (likely 55°13° to 61°16°)55°13°20%7 mph11 km/h from NNE, gusts 12 mph19 km/h62%51%3
Sun 5pCloudy54°12° (likely 54°12° to 60°16°)54°12°20%8 mph13 km/h from NNE, gusts 14 mph23 km/h67%76%1
Sun 6pCloudy52°11° (likely 51°11° to 56°13°)52°11°70%, 0.06 in1.5 mm9 mph14 km/h from NNE, gusts 17 mph28 km/h73%96%0
Sun 7pCloudy51°11° (likely 49°9° to 53°12°)47°8°70%, 0.06 in1.5 mm9 mph14 km/h from NNE, gusts 21 mph33 km/h80%99%0
Sun 8pCloudy48°9° (likely 48°9° to 52°11°)43°6°70%, 0.06 in1.5 mm10 mph16 km/h from N, gusts 24 mph38 km/h93%100%0
Sun 9pShowers48°9° (likely 47°8° to 51°11°)44°7°70%, 0.06 in1.5 mm9 mph14 km/h from N, gusts 25 mph40 km/h93%99%0
Sun 10pShowers47°8° (likely 46°8° to 50°10°)43°6°70%, 0.06 in1.5 mm8 mph13 km/h from N, gusts 17 mph28 km/h95%100%0
Sun 11pCloudy46°8° (likely 46°8° to 50°10°)42°6°70%, 0.06 in1.5 mm8 mph13 km/h from N, gusts 12 mph19 km/h98%100%0
Mon 12aCloudy47°8° (likely 45°7° to 50°10°)43°6°60%, 0.09 in2.3 mm7 mph11 km/h from N, gusts 11 mph18 km/h94%100%0
Mon 1aShowers45°7° (likely 45°7° to 48°9°)40°4°60%, 0.09 in2.3 mm8 mph13 km/h from N, gusts 21 mph33 km/h97%100%0
Mon 2aDrizzle45°7° (likely 45°7° to 48°9°)41°5°60%, 0.09 in2.3 mm7 mph11 km/h from N, gusts 17 mph28 km/h100%100%0
Mon 3aDrizzle45°7° (likely 44°7° to 48°9°)41°5°60%, 0.09 in2.3 mm7 mph11 km/h from N, gusts 21 mph33 km/h95%100%0
Mon 4aShowers44°7° (likely 44°7° to 48°9°)40°4°60%, 0.09 in2.3 mm6 mph10 km/h from N, gusts 21 mph33 km/h98%100%0
Mon 5aDrizzle44°7° (likely 43°6° to 48°9°)40°4°60%, 0.09 in2.3 mm6 mph10 km/h from N, gusts 22 mph36 km/h94%100%0
Mon 6aShowers43°6° (likely 43°6° to 48°9°)40°4°30%, 0.01 in0.3 mm6 mph10 km/h from N, gusts 21 mph34 km/h96%94%0
Mon 7aShowers41°5° (likely 41°5° to 48°9°)38°3°30%, 0.01 in0.3 mm6 mph10 km/h from N, gusts 10 mph17 km/h99%86%0
Mon 8aShowers42°6° (likely 41°5° to 48°9°)39°4°30%, 0.01 in0.3 mm6 mph10 km/h from N, gusts 6 mph10 km/h99%83%0
Mon 9aShowers45°7° (likely 43°6° to 48°9°)42°6°30%, 0.01 in0.3 mm6 mph10 km/h from N, gusts 6 mph9 km/h100%71%1
Mon 10aShowers48°9° (likely 46°8° to 51°11°)46°8°30%, 0.01 in0.3 mm5 mph8 km/h from NNE, gusts 5 mph9 km/h90%73%2

Days ahead

Shaded: typical range for these dates (1991–2020)
  1. Today, Oct 24. Cloudy. High 53°12°, low 38°3°. Typical 62°17° / 30°−1°. Dry. Mostly agree.
    1. Afternoon

      noon–6 PM

      Cloudy, 53°12°

      Dry

    2. Evening

      6 PM–midnight

      Showers, 48°9°

      50% chance · 0.18 in4.6 mm

    3. Overnight

      midnight–6 AM

      Cloudy, 41°5°

      Dry

    Official NWS forecast

    Today: Mostly cloudy, with a high near 53. East northeast wind 8 to 12 mph, with gusts as high as 20 mph.

    Tonight: A chance of rain showers before midnight. Cloudy. Low around 38, with temperatures rising to around 41 overnight. East southeast wind 5 to 8 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.

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

    High, likely
    53°12°–58°14°
    Low, likely
    38°3°–47°8°
    Typical high / low
    62°17° / 30°−1°
    Wind
    14 mph22 km/h, gusts 22 mph36 km/h
    UV peak
    4
  2. Tomorrow, Oct 25. Mostly cloudy. High 55°13°, low 41°5°. Typical 62°17° / 30°−1°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 40°4°

      Dry

    2. Afternoon

      noon–6 PM

      Showers, 55°13°

      Dry

    3. Evening

      6 PM–midnight

      Showers, 48°9°

      70% chance · 0.36 in9.1 mm

    4. Overnight

      midnight–6 AM

      Showers, 44°7°

      60% chance · 0.54 in14 mm

    Official NWS forecast

    Day: A slight chance of rain showers after 3pm. Mostly cloudy, with a high near 55. East northeast wind 3 to 8 mph. Chance of precipitation is 20%.

    Night: Showers and thunderstorms likely. Mostly cloudy, with a low around 41. North wind 6 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 70%.

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

    High, likely
    54°12°–61°16°
    Low, likely
    37°3°–41°5°
    Typical high / low
    62°17° / 30°−1°
    Wind
    18 mph28 km/h, gusts 29 mph46 km/h
    UV peak
    5
  3. Monday, Oct 26. Drizzle. High 60°16°, low 34°1°. Typical 62°17° / 30°−1°. Rain 0.17 in4.3 mm, 30% chance. Mostly agree.
    1. Morning

      6 AM–noon

      Showers, 42°6°

      30% chance · 0.05 in1.3 mm

    2. Afternoon

      noon–6 PM

      Sunny, 60°16°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 50°10°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 37°3°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: A chance of rain showers before noon. Mostly sunny, with a high near 60. East northeast wind 2 to 6 mph. Chance of precipitation is 30%.

    Night: Mostly clear, with a low around 34.

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

    High, likely
    57°14°–62°17°
    Low, likely
    34°1°–45°7°
    Typical high / low
    62°17° / 30°−1°
    Wind
    16 mph25 km/h, gusts 25 mph40 km/h
    UV peak
    5
  4. Tuesday, Oct 27. Mostly sunny. High 66°19°, low 36°2°. Typical 61°16° / 29°−2°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 36°2°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 69°20°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 54°12°

      Dry

    4. Overnight

      midnight–6 AM

      Cloudy, 38°3°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Sunny, with a high near 66.

    Night: Mostly clear, with a low around 36.

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

    High, likely
    66°19°–71°22°
    Low, likely
    29°−2°–41°5°
    Typical high / low
    61°16° / 29°−2°
    Wind
    16 mph26 km/h, gusts 28 mph45 km/h
    UV peak
    5
  5. Wednesday, Oct 28. Mostly sunny. High 65°18°, low 35°2°. Typical 61°16° / 29°−2°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Cloudy, 38°3°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 66°19°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 53°12°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 39°4°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Sunny, with a high near 65.

    Night: Partly cloudy, with a low around 35.

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

    High, likely
    65°18°–68°20°
    Low, likely
    31°−1°–43°6°
    Typical high / low
    61°16° / 29°−2°
    Wind
    10 mph15 km/h, gusts 24 mph39 km/h
    UV peak
    4
  6. Thursday, Oct 29. Partly sunny. High 65°18°, low 37°3°. Typical 60°16° / 29°−2°. Dry. Mostly agree.
    1. Morning

      6 AM–noon

      Cloudy, 39°4°

      Dry

    2. Afternoon

      noon–6 PM

      Partly sunny, 66°19°

      Dry

    3. Evening

      6 PM–midnight

      Mostly clear, 52°11°

      Dry

    4. Overnight

      midnight–6 AM

      Cloudy, 40°5°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Mostly sunny, with a high near 65.

    Night: Partly cloudy, with a low around 37.

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

    High, likely
    64°18°–67°19°
    Low, likely
    30°−1°–46°8°
    Typical high / low
    60°16° / 29°−2°
    Wind
    12 mph19 km/h, gusts 19 mph31 km/h
    UV peak
    4
  7. Friday, Oct 30. Cloudy. High 65°18°, low 38°3°. Typical 60°16° / 28°−2°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 43°6°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 66°19°

      Dry

    3. Evening

      6 PM–midnight

      Partly cloudy, 53°12°

      Dry

    4. Overnight

      midnight–6 AM

      Cloudy, 41°5°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Partly sunny, with a high near 65.

    Night: Mostly cloudy, with a low around 38.

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

    High, likely
    62°17°–70°21°
    Low, likely
    34°1°–45°7°
    Typical high / low
    60°16° / 28°−2°
    Wind
    8 mph13 km/h
    UV peak
    4
  8. Saturday, Oct 31. Drizzle. High 63°17°, low 40°4°. Typical 60°16° / 28°−2°. Rain 0.06 in1.5 mm, 20% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Partly sunny, 44°7°

      Dry

    2. Afternoon

      noon–6 PM

      Partly sunny, 65°19°

      Dry

    3. Evening

      6 PM–midnight

      Drizzle, 52°11°

      Dry

    4. Overnight

      midnight–6 AM

      Drizzle, 37°3°

      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
    56°13°–68°20°
    Low, likely
    33°1°–47°8°
    Typical high / low
    60°16° / 28°−2°
    Wind
    21 mph34 km/h, gusts 31 mph50 km/h
    UV peak
    3
  9. Sunday, Nov 1. Drizzle. High 53°12°, low 36°2°. Typical 59°15° / 28°−2°. Rain 0.15 in3.8 mm, 30% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 39°4°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 53°12°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 44°7°

      30% chance

    4. Overnight

      midnight–6 AM

      Clear, 33°0°

      30% chance

    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
    39°4°–61°16°
    Low, likely
    23°−5°–42°6°
    Typical high / low
    59°15° / 28°−2°
    Wind
    14 mph23 km/h, gusts 25 mph41 km/h
    UV peak
    4
  10. Monday, Nov 2. Cloudy. High 58°14°, low 40°4°. Typical 59°15° / 28°−2°. Rain 0.05 in1.3 mm, 30% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 38°3°

      30% chance

    2. Afternoon

      noon–6 PM

      Sunny, 58°14°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 48°9°

      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
    54°12°–62°17°
    Low, likely
    36°2°–46°8°
    Typical high / low
    59°15° / 28°−2°
    Wind
    12 mph19 km/h, gusts 27 mph44 km/h
    UV peak
    4

The outlook

  1. Today

    Dry, high 53°, low 38°.

  2. Tomorrow

    Dry, high 55°, low 41°.

  3. Monday

    33% chance of rain, high 60°, low 34°, warming up.

  4. Rest of week

    Mostly dry, highs 53–66°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (BOU) (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

Saint Vrain Creek near Platteville

3.8 mi
Below flood stage
Level
1.5 ft
Flow
92 cfs

Reading from Sat 9:30 AM · NWS gauge page

Big Thompson River (CO) near La Salle

7.4 mi
Below flood stage
Level
1.2 ft
Flow
28 cfs

Reading from Sat 9:30 AM · NWS gauge page

Big Thompson River (CO) at Loveland

9.3 mi
Below flood stage
Level
0.6 ft
Flow
8 cfs

Reading from Sat 9:30 AM · NWS gauge page

Saint Vrain Creek below Longmont

11 mi
Below flood stage
Level
10.1 ft
Flow
101 cfs

Reading from Sat 10 AM · NWS gauge page

For your home

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

Heating this week

About 74% less heating than a typical week.

This week 36Typical 139

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F
28
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 9 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 32°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?

LONGMONT 2 ESE · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

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

Normal high / low
62°17° / 30°−1°
Forecast high / low
53°12° / 38°3°
Record high
84°29° in 2003
Record low
8°−13° in 1942

Last 7 days vs normal

On average 10°6° warmer than normal (daily mean temperature).

  1. +5°+3°SunOct 18
  2. +9°+5°MonOct 19
  3. +6°+3°TueOct 20
  4. +9°+5°WedOct 21
  5. +13°+7°ThuOct 22
  6. +13°+7°FriOct 23
  7. +16°+9°SatOct 24

Johnstown weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Sunrise 7:20 AM, sunset 6:06 PM.

Daylight
10 h 46 min
Losing 2 min 30 s a day; shortest Dec 21, 1 h 28 min less
Golden hour
5:28–6:23 PM
Morning 7:03–7:58 AM
Blue hour
6:23–6:34 PM
Morning 6:52–7:03 AM; first light 6:52 AM

Stars tonight? Poor

Clouds most of the night (about 86% cover).

Moon

Waxing gibbous

97% lit · growing

Today
sets 5:37 AM · rises 5:05 PM
Full moon
Oct 25
New moon
Nov 9
Looking west from Johnstown. The highest point on the skyline is about 14,100 ft, 66 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

UniColorado Heating & Cooling, a Denver HVAC installer

UniColorado Heating & Cooling installs heat pumps, furnaces and air conditioning across the Front Range. 12,000+ heat pumps installed since 2014.