Observed 11:55 PM MDT at K1KM

Harlowton, MT weather

Clear and 29°−2°, 8°4° colder than a typical Oct 25, freeze watch tonight, low 23°−5°.

Forecasts agree

Now 29°−2°

Clear · Feels like 19°−7°

Feels like: 19°−7°; Wind chill from 11 mph18 km/h wind · air 29°−2°
Wind: 11 mph18 km/h; From the north. 58–11 mph18 km/h through 12 PM
Dew point: 25°−4°; Dry, static shocks likely
UV index: 0Low; Moderate 12–4 PM · peak 4
Pressure: 30.22 inHg1023 hPa; Steady over the next 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Hard freeze until 11 AM (low 23°−5°)
Above 30°−1° today by 10 AM
High 45°7° today at 3 PM
Hard freeze tonight 8 PM–11 AM (low 23°−5°)
Below freezing tomorrow night from 10 PM (low 32°0°)

TonightNear 26°−3° · freezing, low 24°−4° · Clear
This morningUp to 36°2° by 11 AM · freezing, low 23°−5° · Clear
This afternoonUp to 45°7° by 3 PM · Clear
TonightDown to 24°−4° by 5 AM · freezing, low 24°−4° · Clear
Tomorrow morningUp to 35°2° by 11 AM · freezing, low 23°−5° · Partly cloudy
Tomorrow afternoonUp to 45°7° by 3 PM · Partly cloudy
Tomorrow nightDown to 32°0° by 10 PM · freezing, low 32°0° · Partly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sun 12a	Clear	27°−3° (likely 27°−3° to 32°0°)	22°−6°	0%	5 mph8 km/h from NNW, gusts 4 mph7 km/h	85%	1%	0
Sun 1a	Clear	26°−3° (likely 26°−3° to 31°−1°)	19°−7°	0%	6 mph10 km/h from NW, gusts 5 mph9 km/h	88%	1%	0
Sun 2a	Clear	25°−4° (likely 25°−4° to 31°−1°)	18°−8°	0%	6 mph10 km/h from WNW, gusts 6 mph9 km/h	90%	0%	0
Sun 3a	Clear	26°−3° (likely 26°−3° to 30°−1°)	19°−7°	0%	6 mph10 km/h from WNW, gusts 5 mph8 km/h	89%	0%	0
Sun 4a	Clear	26°−3° (likely 26°−3° to 30°−1°)	19°−7°	0%	6 mph10 km/h from WNW, gusts 5 mph7 km/h	87%	0%	0
Sun 5a	Clear	24°−4° (likely 24°−4° to 30°−1°)	17°−8°	0%	6 mph10 km/h from NW, gusts 4 mph7 km/h	89%	0%	0
Sun 6a	Clear	24°−4° (likely 24°−4° to 30°−1°)	17°−8°	0%	6 mph10 km/h from NNW, gusts 4 mph7 km/h	89%	0%	0
Sun 7a	Clear	24°−4° (likely 24°−4° to 30°−1°)	18°−8°	0%	5 mph8 km/h from N, gusts 4 mph6 km/h	90%	0%	0
Sun 8a	Sunny	23°−5° (likely 23°−5° to 31°−1°)	17°−8°	0%	5 mph8 km/h from N, gusts 3 mph5 km/h	90%	0%	0
Sun 9a	Sunny	26°−3° (likely 26°−3° to 33°1°)	19°−7°	0%	6 mph10 km/h from NNW, gusts 6 mph9 km/h	84%	0%	0
Sun 10a	Sunny	32°0° (likely 32°0° to 36°2°)	27°−3°	0%	5 mph8 km/h from NNE, gusts 7 mph11 km/h	77%	0%	1
Sun 11a	Sunny	36°2° (likely 36°2° to 40°4°)	31°−1°	0%	6 mph10 km/h from E, gusts 6 mph9 km/h	66%	0%	2
Sun 12p	Sunny	41°5° (likely 40°4° to 42°6°)	37°3°	0%	6 mph10 km/h from E, gusts 9 mph15 km/h	56%	1%	3
Sun 1p	Sunny	43°6° (likely 42°6° to 45°7°)	38°3°	0%	8 mph13 km/h from E, gusts 11 mph17 km/h	49%	2%	4
Sun 2p	Sunny	44°7° (likely 44°7° to 46°8°)	38°3°	0%	10 mph16 km/h from ESE, gusts 12 mph19 km/h	45%	1%	4
Sun 3p	Sunny	45°7° (likely 44°7° to 47°8°)	39°4°	0%	13 mph21 km/h from ESE, gusts 13 mph21 km/h	43%	0%	3
Sun 4p	Sunny	44°7° (likely 44°7° to 46°8°)	38°3°	0%	13 mph21 km/h from E, gusts 15 mph24 km/h	45%	0%	2
Sun 5p	Sunny	43°6° (likely 43°6° to 44°7°)	36°2°	0%	14 mph23 km/h from ESE, gusts 16 mph25 km/h	47%	0%	1
Sun 6p	Clear	39°4° (likely 39°4° to 41°5°)	32°0°	0%	12 mph19 km/h from E, gusts 17 mph28 km/h	61%	0%	0
Sun 7p	Clear	34°1° (likely 34°1° to 38°3°)	27°−3°	0%	8 mph13 km/h from E, gusts 12 mph19 km/h	71%	0%	0
Sun 8p	Clear	31°−1° (likely 31°−1° to 36°2°)	26°−3°	0%	5 mph8 km/h from ESE, gusts 7 mph12 km/h	79%	0%	0
Sun 9p	Clear	30°−1° (likely 30°−1° to 35°2°)	26°−3°	0%	3 mph5 km/h from SSE, gusts 5 mph8 km/h	82%	0%	0
Sun 10p	Clear	29°−2° (likely 29°−2° to 34°1°)	25°−4°	0%	3 mph5 km/h from S, gusts 3 mph5 km/h	82%	0%	0
Sun 11p	Clear	28°−2° (likely 28°−2° to 34°1°)	24°−4°	0%	3 mph5 km/h from SSE, gusts 3 mph4 km/h	84%	0%	0
Mon 12a	Clear	27°−3° (likely 27°−3° to 34°1°)	22°−6°	0%	5 mph8 km/h from SSE, gusts 4 mph6 km/h	85%	0%	0
Mon 1a	Mostly clear	26°−3° (likely 26°−3° to 33°1°)	22°−6°	0%	3 mph5 km/h from SE, gusts 4 mph6 km/h	87%	8%	0
Mon 2a	Clear	25°−4° (likely 25°−4° to 32°0°)	21°−6°	0%	3 mph5 km/h from S, gusts 3 mph5 km/h	91%	37%	0
Mon 3a	Clear	26°−3° (likely 26°−3° to 32°0°)	22°−6°	0%	3 mph5 km/h from SW, gusts 3 mph5 km/h	90%	40%	0
Mon 4a	Clear	25°−4° (likely 25°−4° to 32°0°)	21°−6°	0%	3 mph5 km/h from WSW, gusts 2 mph4 km/h	89%	40%	0
Mon 5a	Clear	24°−4° (likely 24°−4° to 31°−1°)	20°−7°	0%	3 mph5 km/h from W, gusts 2 mph3 km/h	93%	35%	0
Mon 6a	Clear	24°−4° (likely 24°−4° to 31°−1°)	20°−7°	5%	3 mph5 km/h from S, gusts 2 mph4 km/h	94%	40%	0
Mon 7a	Clear	23°−5° (likely 23°−5° to 30°−1°)	18°−8°	5%	3 mph5 km/h from S, gusts 3 mph5 km/h	96%	40%	0
Mon 8a	Sunny	24°−4° (likely 23°−5° to 30°−1°)	20°−7°	0%	3 mph5 km/h from S, gusts 2 mph3 km/h	97%	41%	0
Mon 9a	Sunny	26°−3° (likely 25°−4° to 31°−1°)	20°−7°	0%	5 mph8 km/h from SE, gusts 2 mph3 km/h	94%	41%	0
Mon 10a	Mostly cloudy	30°−1° (likely 30°−1° to 34°1°)	25°−4°	0%	5 mph8 km/h from SE, gusts 4 mph6 km/h	91%	45%	1
Mon 11a	Sunny	35°2° (likely 34°1° to 37°3°)	31°−1°	0%	5 mph8 km/h from SE, gusts 4 mph7 km/h	81%	38%	2
Mon 12p	Sunny	38°3° (likely 37°3° to 40°4°)	33°1°	0%	7 mph11 km/h from ESE, gusts 6 mph9 km/h	71%	20%	3
Mon 1p	Mostly sunny	42°6° (likely 40°4° to 43°6°)	38°3°	0%	7 mph11 km/h from ESE, gusts 7 mph11 km/h	62%	23%	4
Mon 2p	Mostly sunny	44°7° (likely 42°6° to 45°7°)	40°4°	0%	7 mph11 km/h from ESE, gusts 9 mph15 km/h	58%	24%	4
Mon 3p	Mostly cloudy	45°7° (likely 44°7° to 46°8°)	40°4°	0%	10 mph16 km/h from ESE, gusts 10 mph17 km/h	56%	47%	3
Mon 4p	Sunny	45°7° (likely 44°7° to 47°8°)	40°4°	0%	10 mph16 km/h from ESE, gusts 12 mph19 km/h	57%	27%	2
Mon 5p	Sunny	44°7° (likely 43°6° to 47°8°)	38°3°	0%	10 mph16 km/h from ESE, gusts 13 mph21 km/h	58%	33%	1
Mon 6p	Cloudy	41°5° (likely 41°5° to 43°6°)	36°2°	10%	7 mph11 km/h from ESE, gusts 12 mph19 km/h	71%	44%	0
Mon 7p	Cloudy	39°4° (likely 36°2° to 42°6°)	34°1°	10%	7 mph11 km/h from ESE, gusts 10 mph16 km/h	82%	58%	0
Mon 8p	Cloudy	36°2° (likely 33°1° to 40°4°)	30°−1°	10%	7 mph11 km/h from ESE, gusts 7 mph11 km/h	90%	32%	0
Mon 9p	Mostly cloudy	33°1° (likely 30°−1° to 39°4°)	29°−2°	10%	5 mph8 km/h from ESE, gusts 4 mph6 km/h	96%	61%	0
Mon 10p	Mostly cloudy	32°0° (likely 27°−3° to 38°3°)	27°−3°	10%	5 mph8 km/h from ESE, gusts 3 mph4 km/h	99%	58%	0
Mon 11p	Mostly cloudy	32°0° (likely 25°−4° to 38°3°)	27°−3°	10%	5 mph8 km/h from ESE, gusts 3 mph4 km/h	100%	66%	0

Days ahead

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

Today, Oct 25. Sunny. High 45°7°, low 22°−6°. Typical 53°12° / 26°−3°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 23°−5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 45°7°
  Dry
3. Evening
  6 PM–midnight
  Clear, 31°−1°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 24°−4°
  Dry
Official NWS forecast
Today: Sunny. High near 45, with temperatures falling to around 43 in the afternoon. Northeast wind 5 to 14 mph.
Tonight: Mostly clear. Low around 22, with temperatures rising to around 24 overnight. Northwest wind around 6 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
44°7°–47°8°
Low, likely
22°−6°–29°−2°
Typical high / low
53°12° / 26°−3°
Wind
12 mph19 km/h, gusts 20 mph32 km/h
UV peak
4
Tomorrow, Oct 26. Fog. High 45°7°, low 28°−2°. Typical 53°12° / 26°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 24°−4°
  Dry
2. Afternoon
  noon–6 PM
  Mostly cloudy, 45°7°
  Dry
3. Evening
  6 PM–midnight
  Mostly cloudy, 36°2°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 33°1°
  30% chance
Official NWS forecast
Day: Patchy fog before 9am. Mostly cloudy, with a high near 45. Southeast wind 3 to 10 mph.
Night: A chance of rain showers between midnight and 3am, then a chance of rain and snow showers. Mostly cloudy. Low around 28, with temperatures rising to around 30 overnight. South southeast wind around 7 mph. Chance of precipitation is 40%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
44°7°–47°8°
Low, likely
22°−6°–30°−1°
Typical high / low
53°12° / 26°−3°
Wind
9 mph15 km/h, gusts 17 mph27 km/h
UV peak
4
Tuesday, Oct 27. Snow. High 46°8°, low 25°−4°. Typical 52°11° / 26°−3°. Snow 0.04 in1 mm, 50% chance. Mostly agree.
1. Morning
  6 AM–noon
  Rain, 38°3°
  50% chance · 0.03 in0.8 mm
2. Afternoon
  noon–6 PM
  Sunny, 49°10°
  40% chance
3. Evening
  6 PM–midnight
  Clear, 41°5°
  Dry
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 before noon. Mostly cloudy. High near 46, with temperatures falling to around 44 in the afternoon. West wind 8 to 37 mph, with gusts as high as 45 mph. Chance of precipitation is 50%.
Night: Partly cloudy. Low around 25, with temperatures rising to around 27 overnight. West wind 13 to 22 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
46°8°–51°11°
Low, likely
25°−4°–37°3°
Typical high / low
52°11° / 26°−3°
Wind
27 mph43 km/h, gusts 43 mph68 km/h
UV peak
3
Wednesday, Oct 28. Mostly sunny. High 51°11°, low 24°−4°. Typical 52°11° / 26°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 31°−1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 51°11°
  Dry
3. Evening
  6 PM–midnight
  Clear, 40°4°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 29°−2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny. High near 51, with temperatures falling to around 47 in the afternoon. West wind 5 to 12 mph.
Night: Mostly clear. Low around 24, with temperatures rising to around 26 overnight. East southeast wind around 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
50°10°–53°12°
Low, likely
24°−4°–34°1°
Typical high / low
52°11° / 26°−3°
Wind
16 mph26 km/h, gusts 34 mph55 km/h
UV peak
3
Thursday, Oct 29. Partly sunny. High 48°9°, low 24°−4°. Typical 51°11° / 25°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 28°−2°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 47°9°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 36°2°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 32°0°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny. High near 48, with temperatures falling to around 44 in the afternoon. South southeast wind around 6 mph.
Night: A chance of rain showers before 9pm, then a chance of rain and snow showers. Mostly cloudy. Low around 24, with temperatures rising to around 27 overnight. North northeast wind around 7 mph. Chance of precipitation is 30%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
44°7°–50°10°
Low, likely
24°−4°–31°−1°
Typical high / low
51°11° / 25°−4°
Wind
16 mph25 km/h, gusts 23 mph37 km/h
UV peak
3
Friday, Oct 30. Snow. High 42°6°, low 23°−5°. Typical 51°11° / 25°−4°. Snow 0.02 in0.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 32°0°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 44°6°
  30% chance
3. Evening
  6 PM–midnight
  Cloudy, 39°4°
  30% chance
4. Overnight
  midnight–6 AM
  Cloudy, 35°1°
  30% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow showers before noon, then a slight chance of rain and snow showers. Mostly cloudy. High near 42, with temperatures falling to around 40 in the afternoon. West southwest wind around 6 mph. Chance of precipitation is 30%.
Night: A chance of rain and snow showers. Mostly cloudy. Low around 23, with temperatures rising to around 26 overnight. South southeast wind around 6 mph. Chance of precipitation is 40%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
36°2°–52°11°
Low, likely
23°−5°–35°2°
Typical high / low
51°11° / 25°−4°
Wind
11 mph18 km/h, gusts 25 mph40 km/h
UV peak
3
Saturday, Oct 31. Snow. High 44°7°, low 32°0°. Typical 51°11° / 24°−4°. Snow 0.05 in1.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 35°2°
  20% chance · 0.04 in1 mm
2. Afternoon
  noon–6 PM
  Sunny, 46°8°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 38°3°
  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 rain and snow showers before noon. Mostly sunny. High near 44, with temperatures falling to around 41 in the afternoon. West wind 5 to 8 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
40°4°–54°12°
Low, likely
24°−4°–38°3°
Typical high / low
51°11° / 24°−4°
Wind
17 mph27 km/h, gusts 24 mph39 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 46°8°, low 30°−1°. Typical 50°10° / 24°−4°. Rain 0.06 in1.5 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 47°8°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 40°5°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 35°2°
  20% 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
43°6°–53°12°
Low, likely
18°−8°–36°2°
Typical high / low
50°10° / 24°−4°
Wind
19 mph30 km/h, gusts 31 mph50 km/h
UV peak
2
Monday, Nov 2. Cloudy. High 48°9°, low 34°1°. Typical 50°10° / 24°−4°. Rain 0.04 in1 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 37°3°
  20% chance
2. Afternoon
  noon–6 PM
  Sunny, 49°10°
  Dry
3. Evening
  6 PM–midnight
  Clear, 42°6°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 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
43°6°–55°13°
Low, likely
31°−1°–37°3°
Typical high / low
50°10° / 24°−4°
Wind
25 mph40 km/h, gusts 46 mph75 km/h
UV peak
3
Tuesday, Nov 3. Cloudy. High 48°9°, low 32°0°. Typical 49°9° / 24°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 51°10°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 40°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
44°7°–54°12°
Low, likely
31°−1°–33°1°
Typical high / low
49°9° / 24°−4°
Wind
18 mph28 km/h, gusts 29 mph47 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 45°, low 22°.
Tomorrow
Dry, high 45°, low 28°.
Tuesday
52% chance of snow, high 46°, low 25°.
Rest of week
Mostly dry, highs 42–51°.

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

0.6 mi

Below flood stage

Level: 2.9 ft

Reading from Sat 11 PM · NWS gauge page

Musselshell River near Shawmut

20 mi

Below flood stage

Level: 2.4 ft

Reading from Sat 11:30 PM · NWS gauge page

Musselshell River near Martinsdale

20 mi

Level: 1.4 ft

Reading from Sat 11:15 PM · NWS gauge page

Sweet Grass Creek at Tronrud Bridge near Melville

23 mi

Level: 0.9 ft
Flow: 7 cfs

Reading from Sat 11 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 66% less heating than a typical week.

This week 64Typical 185

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

Comfort

Dry air outside (dew point 25°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?

Harlowton · official normals 1991–2020 · records 1948–2026

Oct 25, today vs a typical year

Today’s expected high is 8°4° colder than typical.

Last 7 days vs normal

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

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

Sun & moon

Sun

Daylight: 10 h 24 min; Losing 3 min 8 s a day; shortest Dec 21, 1 h 49 min less
Golden hour: 5:32–6:34 PM; Morning 7:31–8:33 AM
Blue hour: 6:34–6:46 PM; Morning 7:20–7:31 AM; first light 7:20 AM

Stars tonight? Fair

Clear 12:46–7:20 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

99% lit · growing

Today: sets 7:21 AM · rises 5:39 PM
Full moon: Today, 10:12 PM
New moon: Nov 9

Looking southwest from Harlowton. The highest point on the skyline is about 12,500 ft, 81 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.