Observed 6:55 PM MDT at K1KM

Judith Gap, MT weather

Clear and 39°4°, 12°7° colder than a typical Oct 24, freeze watch tonight, low 22°−6°.

Mostly agree

Now 39°4°

Clear

Wind: Calm; Up to 8 mph13 km/h through 8 AM
Dew point: 26°−3°; Dry · down to 18°−8° by 9 PM
UV tomorrow: 4Moderate; Moderate 12–4 PM · peak 4
Pressure: 30.19 inHg1022 hPa; Rising · +0.05 inHg+1.8 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Hard freeze until noon tomorrow (low 22°−6°)
Above 30°−1° tomorrow by 11 AM
High 40°4° tomorrow at 3 PM
Hard freeze tomorrow night 7 PM–noon (low 23°−5°)
Below 30°−1° tomorrow night after 8 PM

TonightDown to 23°−5° by 5 AM · freezing, low 23°−5° · Clear
Tomorrow morningUp to 32°0° by 11 AM · freezing, low 22°−6° · Clear
Tomorrow afternoonUp to 40°4° by 3 PM · Clear
Tomorrow nightDown to 26°−3° by 2 AM · freezing, low 26°−3° · Clear
Monday morningUp to 32°0° by 11 AM · freezing, low 23°−5° · Partly cloudy
Monday afternoonUp to 40°4° by 3 PM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 8p	Clear	31°−1° (likely 30°−1° to 34°1°)	24°−4°	0%	8 mph13 km/h from SE, gusts 8 mph13 km/h	65%	2%	0
Sat 9p	Clear	28°−2° (likely 28°−2° to 34°1°)	20°−7°	0%	8 mph13 km/h from SE, gusts 6 mph9 km/h	66%	4%	0
Sat 10p	Clear	27°−3° (likely 27°−3° to 33°1°)	19°−7°	0%	8 mph13 km/h from SE, gusts 8 mph12 km/h	68%	7%	0
Sat 11p	Clear	27°−3° (likely 27°−3° to 32°0°)	20°−7°	0%	6 mph10 km/h from SSE, gusts 6 mph9 km/h	67%	10%	0
Sun 12a	Clear	27°−3° (likely 27°−3° to 32°0°)	20°−7°	0%	6 mph10 km/h from S, gusts 4 mph7 km/h	67%	10%	0
Sun 1a	Clear	27°−3° (likely 27°−3° to 32°0°)	22°−6°	0%	5 mph8 km/h from S, gusts 5 mph7 km/h	66%	9%	0
Sun 2a	Clear	25°−4° (likely 25°−4° to 33°1°)	19°−7°	0%	5 mph8 km/h from SSW, gusts 4 mph6 km/h	69%	3%	0
Sun 3a	Clear	25°−4° (likely 25°−4° to 32°0°)	19°−7°	0%	5 mph8 km/h from SSW, gusts 4 mph6 km/h	71%	0%	0
Sun 4a	Clear	25°−4° (likely 25°−4° to 31°−1°)	19°−7°	0%	5 mph8 km/h from WSW, gusts 6 mph9 km/h	71%	0%	0
Sun 5a	Clear	23°−5° (likely 23°−5° to 32°0°)	16°−9°	0%	6 mph10 km/h from N, gusts 6 mph10 km/h	72%	1%	0
Sun 6a	Clear	23°−5° (likely 23°−5° to 32°0°)	15°−9°	0%	7 mph11 km/h from E, gusts 5 mph9 km/h	73%	13%	0
Sun 7a	Clear	23°−5° (likely 23°−5° to 29°−2°)	16°−9°	0%	6 mph10 km/h from N, gusts 7 mph11 km/h	77%	17%	0
Sun 8a	Sunny	22°−6° (likely 22°−6° to 29°−2°)	15°−9°	0%	6 mph10 km/h from NNE, gusts 7 mph12 km/h	79%	16%	0
Sun 9a	Sunny	24°−4° (likely 24°−4° to 30°−1°)	16°−9°	0%	7 mph11 km/h from WNW, gusts 11 mph18 km/h	79%	15%	0
Sun 10a	Sunny	29°−2° (likely 28°−2° to 33°1°)	25°−4°	0%	3 mph5 km/h from W, gusts 12 mph19 km/h	74%	14%	1
Sun 11a	Sunny	32°0° (likely 31°−1° to 36°2°)	29°−2°	0%	3 mph5 km/h from S, gusts 10 mph16 km/h	70%	5%	2
Sun 12p	Sunny	35°2° (likely 33°1° to 39°4°)	31°−1°	0%	5 mph8 km/h from SSE, gusts 7 mph11 km/h	67%	8%	3
Sun 1p	Sunny	38°3° (likely 34°1° to 41°5°)	34°1°	0%	6 mph10 km/h from SSE, gusts 8 mph12 km/h	62%	4%	4
Sun 2p	Sunny	39°4° (likely 39°4° to 43°6°)	33°1°	0%	8 mph13 km/h from SE, gusts 10 mph15 km/h	57%	2%	4
Sun 3p	Sunny	40°4° (likely 40°4° to 45°7°)	34°1°	0%	9 mph14 km/h from SE, gusts 11 mph18 km/h	55%	1%	3
Sun 4p	Sunny	39°4° (likely 39°4° to 44°7°)	33°1°	0%	9 mph14 km/h from SE, gusts 12 mph19 km/h	55%	0%	2
Sun 5p	Sunny	38°3° (likely 38°3° to 42°6°)	31°−1°	0%	10 mph16 km/h from SSE, gusts 13 mph22 km/h	55%	0%	1
Sun 6p	Clear	34°1° (likely 34°1° to 38°3°)	27°−3°	0%	9 mph14 km/h from SSE, gusts 16 mph25 km/h	68%	1%	0
Sun 7p	Clear	30°−1° (likely 30°−1° to 36°2°)	22°−6°	0%	9 mph14 km/h from SSE, gusts 14 mph22 km/h	72%	1%	0
Sun 8p	Clear	29°−2° (likely 29°−2° to 34°1°)	20°−7°	0%	9 mph14 km/h from SSE, gusts 11 mph18 km/h	73%	1%	0
Sun 9p	Clear	28°−2° (likely 28°−2° to 33°1°)	18°−8°	0%	12 mph19 km/h from SSE, gusts 10 mph16 km/h	71%	0%	0
Sun 10p	Clear	27°−3° (likely 27°−3° to 33°1°)	17°−8°	0%	12 mph19 km/h from SSE, gusts 10 mph16 km/h	73%	0%	0
Sun 11p	Clear	28°−2° (likely 28°−2° to 33°1°)	18°−8°	0%	12 mph19 km/h from SSE, gusts 9 mph15 km/h	71%	3%	0
Mon 12a	Clear	27°−3° (likely 27°−3° to 32°0°)	17°−8°	5%	10 mph16 km/h from SSE, gusts 9 mph15 km/h	74%	6%	0
Mon 1a	Partly cloudy	27°−3° (likely 27°−3° to 32°0°)	17°−8°	5%	10 mph16 km/h from SSE, gusts 9 mph15 km/h	74%	30%	0
Mon 2a	Clear	26°−3° (likely 26°−3° to 32°0°)	16°−9°	5%	10 mph16 km/h from SSE, gusts 9 mph14 km/h	80%	41%	0
Mon 3a	Clear	26°−3° (likely 26°−3° to 31°−1°)	15°−9°	5%	12 mph19 km/h from SSE, gusts 11 mph18 km/h	85%	41%	0
Mon 4a	Clear	26°−3° (likely 26°−3° to 32°0°)	15°−9°	5%	12 mph19 km/h from SSE, gusts 11 mph18 km/h	87%	41%	0
Mon 5a	Clear	26°−3° (likely 26°−3° to 31°−1°)	15°−9°	5%	12 mph19 km/h from SSE, gusts 11 mph17 km/h	89%	40%	0
Mon 6a	Clear	25°−4° (likely 25°−4° to 31°−1°)	14°−10°	0%	13 mph21 km/h from SSE, gusts 11 mph18 km/h	91%	40%	0
Mon 7a	Clear	23°−5° (likely 23°−5° to 31°−1°)	11°−12°	0%	13 mph21 km/h from SSE, gusts 10 mph16 km/h	94%	40%	0
Mon 8a	Sunny	24°−4° (likely 24°−4° to 31°−1°)	12°−11°	0%	13 mph21 km/h from SSE, gusts 10 mph17 km/h	96%	40%	0
Mon 9a	Sunny	27°−3° (likely 27°−3° to 32°0°)	16°−9°	0%	14 mph23 km/h from SSE, gusts 11 mph18 km/h	96%	40%	0
Mon 10a	Sunny	29°−2° (likely 29°−2° to 34°1°)	18°−8°	0%	14 mph23 km/h from SSE, gusts 14 mph22 km/h	94%	44%	1
Mon 11a	Sunny	32°0° (likely 32°0° to 37°3°)	22°−6°	0%	14 mph23 km/h from SSE, gusts 16 mph25 km/h	90%	46%	2
Mon 12p	Sunny	35°2° (likely 35°2° to 40°4°)	25°−4°	0%	15 mph24 km/h from SSE, gusts 17 mph27 km/h	85%	37%	3
Mon 1p	Sunny	37°3° (likely 37°3° to 42°6°)	28°−2°	0%	15 mph24 km/h from SSE, gusts 17 mph28 km/h	79%	6%	4
Mon 2p	Sunny	39°4° (likely 39°4° to 44°7°)	31°−1°	0%	15 mph24 km/h from SSE, gusts 18 mph29 km/h	73%	4%	4
Mon 3p	Sunny	40°4° (likely 40°4° to 46°8°)	32°0°	0%	15 mph24 km/h from SSE, gusts 19 mph31 km/h	69%	1%	3
Mon 4p	Partly sunny	39°4° (likely 39°4° to 45°7°)	31°−1°	0%	15 mph24 km/h from SSE, gusts 19 mph31 km/h	70%	25%	2
Mon 5p	Partly sunny	38°3° (likely 38°3° to 44°7°)	29°−2°	0%	15 mph24 km/h from SSE, gusts 19 mph31 km/h	74%	41%	1
Mon 6p	Clear	36°2° (likely 36°2° to 41°5°)	27°−3°	10%	14 mph23 km/h from SSE, gusts 19 mph30 km/h	79%	15%	0
Mon 7p	Partly cloudy	35°2° (likely 35°2° to 40°4°)	26°−3°	10%	14 mph23 km/h from SSE, gusts 18 mph29 km/h	84%	49%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Cloudy. High 39°4°, low 21°−6°. Typical 51°11° / 28°−2°. Rain, 20% chance. Mostly agree.
1. Evening
  6 PM–midnight
  Clear, 31°−1°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 23°−5°
  Dry
Official NWS forecast
Tonight: Mostly clear, with a low around 21. South wind 5 to 8 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
36°2°–41°5°
Low, likely
19°−7°–22°−6°
Typical high / low
51°11° / 28°−2°
Wind
18 mph29 km/h, gusts 37 mph60 km/h
UV peak
4
Tomorrow, Oct 25. Mostly sunny. High 40°4°, low 22°−6°. Typical 51°11° / 27°−3°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 22°−6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 40°4°
  Dry
3. Evening
  6 PM–midnight
  Clear, 29°−2°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 26°−3°
  Dry
Official NWS forecast
Day: Sunny, with a high near 40. Southeast wind 3 to 10 mph, with gusts as high as 18 mph.
Night: Partly cloudy. Low around 22, with temperatures rising to around 26 overnight. South southeast wind around 12 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
40°4°–45°7°
Low, likely
22°−6°–28°−2°
Typical high / low
51°11° / 27°−3°
Wind
11 mph17 km/h, gusts 19 mph30 km/h
UV peak
4
Monday, Oct 26. Mostly cloudy. High 40°4°, low 26°−3°. Typical 50°10° / 27°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 24°−4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 40°4°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 37°3°
  Dry
4. Overnight
  midnight–6 AM
  Drizzle, 34°1°
  30% chance
Official NWS forecast
Day: Partly sunny, with a high near 40. South southeast wind around 15 mph, with gusts as high as 24 mph.
Night: A slight chance of rain and snow showers after midnight. Mostly cloudy, with a low around 26. South southeast wind 8 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
40°4°–46°8°
Low, likely
24°−4°–30°−1°
Typical high / low
50°10° / 27°−3°
Wind
16 mph25 km/h, gusts 29 mph47 km/h
UV peak
4
Tuesday, Oct 27. Snow. High 44°7°, low 25°−4°. Typical 50°10° / 26°−3°. Snow 0.05 in1.3 mm, 50% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 35°2°
  50% chance · 0.02 in0.4 mm
2. Afternoon
  noon–6 PM
  Cloudy, 46°8°
  50% chance
3. Evening
  6 PM–midnight
  Clear, 39°4°
  30% chance
4. Overnight
  midnight–6 AM
  Clear, 33°1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain and snow showers. Mostly cloudy, with a high near 44. Southwest wind 8 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.
Night: Mostly cloudy, with a low around 25. West wind 12 to 15 mph, with gusts as high as 24 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
42°6°–48°9°
Low, likely
25°−4°–35°2°
Typical high / low
50°10° / 26°−3°
Wind
24 mph38 km/h, gusts 35 mph57 km/h
UV peak
3
Wednesday, Oct 28. Partly sunny. High 45°7°, low 23°−5°. Typical 49°9° / 26°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 32°0°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 49°10°
  Dry
3. Evening
  6 PM–midnight
  Clear, 38°3°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 30°−1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 45. West wind around 10 mph.
Night: Partly cloudy, with a low around 23.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
45°7°–50°10°
Low, likely
23°−5°–33°1°
Typical high / low
49°9° / 26°−3°
Wind
15 mph24 km/h, gusts 39 mph63 km/h
UV peak
3
Thursday, Oct 29. Cloudy. High 41°5°, low 23°−5°. Typical 49°9° / 26°−3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 31°−1°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 45°7°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 33°1°
  30% chance
4. Overnight
  midnight–6 AM
  Cloudy, 28°−2°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 41.
Night: A slight chance of snow showers before 9pm, then a slight chance of rain and snow showers. Mostly cloudy, with a low around 23.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
40°4°–49°9°
Low, likely
23°−5°–30°−1°
Typical high / low
49°9° / 26°−3°
Wind
14 mph23 km/h, gusts 24 mph38 km/h
UV peak
3
Friday, Oct 30. Snow. High 41°5°, low 23°−5°. Typical 48°9° / 26°−3°. Snow 0.02 in0.5 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 27°−3°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 39°4°
  30% chance
3. Evening
  6 PM–midnight
  Cloudy, 34°1°
  30% chance
4. Overnight
  midnight–6 AM
  Cloudy, 30°−1°
  30% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of snow showers before noon. Partly sunny, with a high near 41.
Night: A slight chance of snow showers. Mostly cloudy, with a low around 23.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
33°1°–44°7°
Low, likely
23°−5°–29°−2°
Typical high / low
48°9° / 26°−3°
Wind
14 mph22 km/h, gusts 26 mph42 km/h
UV peak
3
Saturday, Oct 31. Mostly cloudy. High 42°6°, low 30°−1°. Typical 48°9° / 25°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 31°−1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 40°4°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 36°2°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 33°0°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 42.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
37°3°–54°12°
Low, likely
23°−5°–35°2°
Typical high / low
48°9° / 25°−4°
Wind
17 mph27 km/h, gusts 22 mph36 km/h
UV peak
3
Sunday, Nov 1. Partly sunny. High 44°7°, low 30°−1°. Typical 48°9° / 25°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 46°8°
  Dry
3. Evening
  6 PM–midnight
  Clear, 38°3°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 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
40°4°–49°9°
Low, likely
24°−4°–36°2°
Typical high / low
48°9° / 25°−4°
Wind
20 mph33 km/h, gusts 32 mph51 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 48°9°, low 33°1°. Typical 47°8° / 25°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 40°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 49°10°
  Dry
3. Evening
  6 PM–midnight
  Clear, 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
42°6°–54°12°
Low, likely
30°−1°–35°2°
Typical high / low
47°8° / 25°−4°
Wind
28 mph46 km/h, gusts 54 mph87 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 39°, low 21°.
Tomorrow
Dry, high 40°, low 22°.
Monday
Dry, high 40°, low 26°.
Rest of week
Highs 41–48°; chance of precipitation on Tuesday.

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

Musselshell River near Harlowton

18 mi

Below flood stage

Level: 2.9 ft

Reading from Sat 6 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: 22°−6°

Overnight low near 22°F — not yet at drip-the-faucets cold, but worth watching if it's forecast to drop further.

Heating this week

About 64% less heating than a typical week.

This week 69Typical 188

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 4 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 26°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?

Harlowton 11nw · official normals 1991–2020 · records 2010–2026

Oct 24, today vs a typical year

Today’s expected high is 12°7° colder than typical.

Last 7 days vs normal

—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24
—SunOct 25

Judith Gap weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 26 min; Losing 3 min 8 s a day; shortest Dec 21, 1 h 53 min less
Golden hour: 5:33–6:35 PM; Morning 7:30–8:32 AM
Blue hour: 6:35–6:46 PM; Morning 7:18–7:30 AM; first light 7:18 AM

Stars tonight? Fair

Clear 8:04 PM–7:20 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 6:03 AM · rises 5:16 PM
Full moon: Oct 25
New moon: Nov 9

Looking northeast from Judith Gap. The highest point on the skyline is about 8,600 ft, 21 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.