Model estimate for 12:00 PM MDT (no recent station report)

Grant, MT weather

Partly cloudy and 32°0°, freeze watch tonight, low 23°−5°.

Mostly agree

Now 32°0°

Partly sunny

Wind: Calm; Light through 12 AM
Dew point: 28°−2°; Dry, static shocks likely
UV index: 4Moderate; Moderate until 5 PM
Air quality: 32Good; Main pollutant: PM2.5 (fine particles)

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

High 42°6° today at 5 PM
Hard freeze tonight 9 PM–noon (low 21°−6°)
Low 21°−6° tomorrow at 8 AM
Above 30°−1° tomorrow by 11 AM
Hard freeze tomorrow night 10 PM–11 AM (low 24°−4°)

This afternoonUp to 42°6° by 5 PM · freezing, low 32°0° · Partly cloudy
TonightDown to 23°−5° by 5 AM · freezing, low 23°−5° · Clear
Tomorrow morningUp to 30°−1° by 11 AM · freezing, low 21°−6° · Partly cloudy
Tomorrow afternoonUp to 44°7° by 5 PM · Partly cloudy
Tomorrow nightDown to 25°−4° by 5 AM · freezing, low 25°−4° · Mostly cloudy
Monday morningUp to 35°2° by 11 AM · freezing, low 24°−4° · Mostly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 12p	Partly sunny	32°0° (likely 27°−3° to 34°1°)	32°0°	0%	1 mph2 km/h from SSE, gusts 2 mph4 km/h	85%	58%	4
Sat 1p	Mostly sunny	35°2° (likely 29°−2° to 37°3°)	35°2°	0%	1 mph2 km/h from SSE, gusts 2 mph3 km/h	79%	35%	4
Sat 2p	Sunny	39°4° (likely 32°0° to 39°4°)	39°4°	0%	2 mph3 km/h from SSE, gusts 3 mph5 km/h	71%	23%	4
Sat 3p	Sunny	40°4° (likely 36°2° to 41°5°)	40°4°	0%	2 mph3 km/h from S, gusts 3 mph5 km/h	67%	20%	4
Sat 4p	Sunny	40°4° (likely 38°3° to 42°6°)	40°4°	0%	2 mph3 km/h from SE, gusts 4 mph7 km/h	65%	17%	3
Sat 5p	Sunny	42°6° (likely 39°4° to 43°6°)	42°6°	0%	3 mph5 km/h from ESE, gusts 4 mph7 km/h	62%	16%	2
Sat 6p	Sunny	39°4° (likely 37°3° to 41°5°)	39°4°	0%	2 mph3 km/h from E, gusts 4 mph6 km/h	67%	11%	1
Sat 7p	Clear	37°3° (likely 34°1° to 37°3°)	37°3°	0%	2 mph3 km/h from ENE, gusts 4 mph7 km/h	69%	0%	0
Sat 8p	Clear	34°1° (likely 33°1° to 36°2°)	34°1°	0%	2 mph3 km/h from ESE, gusts 4 mph6 km/h	77%	0%	0
Sat 9p	Clear	31°−1° (likely 31°−1° to 35°2°)	28°−2°	0%	3 mph5 km/h from ESE, gusts 4 mph6 km/h	77%	0%	0
Sat 10p	Clear	30°−1° (likely 30°−1° to 34°1°)	26°−3°	0%	3 mph5 km/h from E, gusts 3 mph5 km/h	78%	1%	0
Sat 11p	Clear	29°−2° (likely 29°−2° to 33°1°)	29°−2°	0%	3 mph5 km/h from E, gusts 3 mph6 km/h	79%	5%	0
Sun 12a	Clear	27°−3° (likely 27°−3° to 33°1°)	27°−3°	0%	3 mph5 km/h from ENE, gusts 4 mph6 km/h	82%	8%	0
Sun 1a	Clear	28°−2° (likely 28°−2° to 33°1°)	28°−2°	0%	2 mph3 km/h from NNW, gusts 4 mph7 km/h	77%	8%	0
Sun 2a	Clear	26°−3° (likely 26°−3° to 33°1°)	26°−3°	0%	2 mph3 km/h from NNW, gusts 4 mph7 km/h	81%	8%	0
Sun 3a	Clear	26°−3° (likely 26°−3° to 33°1°)	26°−3°	0%	1 mph2 km/h from WNW, gusts 4 mph6 km/h	81%	6%	0
Sun 4a	Clear	24°−4° (likely 24°−4° to 33°1°)	24°−4°	0%	1 mph2 km/h from SW, gusts 3 mph4 km/h	85%	10%	0
Sun 5a	Clear	23°−5° (likely 23°−5° to 33°1°)	23°−5°	0%	1 mph2 km/h from SSE, gusts 3 mph4 km/h	87%	17%	0
Sun 6a	Clear	23°−5° (likely 23°−5° to 33°1°)	23°−5°	0%	1 mph2 km/h from S, gusts 4 mph6 km/h	84%	18%	0
Sun 7a	Clear	23°−5° (likely 23°−5° to 33°1°)	23°−5°	0%	1 mph2 km/h from SSW, gusts 3 mph6 km/h	88%	21%	0
Sun 8a	Sunny	21°−6° (likely 21°−6° to 33°1°)	21°−6°	0%	1 mph2 km/h from W, gusts 3 mph5 km/h	91%	21%	0
Sun 9a	Sunny	23°−5° (likely 23°−5° to 33°1°)	23°−5°	0%	1 mph2 km/h from W, gusts 2 mph4 km/h	93%	31%	0
Sun 10a	Partly sunny	28°−2° (likely 28°−2° to 36°2°)	28°−2°	0%	1 mph2 km/h from N, gusts 2 mph3 km/h	85%	45%	1
Sun 11a	Mostly sunny	30°−1° (likely 30°−1° to 39°4°)	30°−1°	0%	1 mph2 km/h from NE, gusts 4 mph6 km/h	82%	34%	2
Sun 12p	Sunny	33°1° (likely 33°1° to 41°5°)	33°1°	0%	2 mph3 km/h from E, gusts 5 mph9 km/h	78%	23%	3
Sun 1p	Mostly sunny	36°2° (likely 36°2° to 44°7°)	36°2°	0%	2 mph3 km/h from E, gusts 5 mph9 km/h	74%	14%	4
Sun 2p	Sunny	40°4° (likely 40°4° to 45°7°)	40°4°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	67%	24%	4
Sun 3p	Sunny	43°6° (likely 43°6° to 47°8°)	41°5°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	64%	40%	4
Sun 4p	Mostly sunny	43°6° (likely 43°6° to 47°8°)	41°5°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	63%	44%	3
Sun 5p	Partly sunny	44°7° (likely 43°6° to 47°8°)	42°6°	0%	5 mph8 km/h from E, gusts 6 mph10 km/h	62%	55%	2
Sun 6p	Mostly cloudy	41°5° (likely 41°5° to 44°7°)	39°4°	0%	2 mph3 km/h from E, gusts 6 mph10 km/h	66%	60%	1
Sun 7p	Mostly cloudy	39°4° (likely 37°3° to 40°4°)	37°3°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	69%	62%	0
Sun 8p	Cloudy	36°2° (likely 34°1° to 38°3°)	33°1°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	73%	72%	0
Sun 9p	Cloudy	33°1° (likely 33°1° to 37°3°)	33°1°	0%	2 mph3 km/h from ENE, gusts 4 mph7 km/h	78%	88%	0
Sun 10p	Cloudy	31°−1° (likely 31°−1° to 36°2°)	31°−1°	0%	2 mph3 km/h from ENE, gusts 4 mph7 km/h	82%	81%	0
Sun 11p	Mostly cloudy	31°−1° (likely 31°−1° to 35°2°)	31°−1°	0%	2 mph3 km/h from ENE, gusts 4 mph6 km/h	85%	66%	0
Mon 12a	Mostly cloudy	30°−1° (likely 29°−2° to 34°1°)	30°−1°	0%	2 mph3 km/h from ENE, gusts 4 mph6 km/h	87%	74%	0
Mon 1a	Cloudy	29°−2° (likely 28°−2° to 34°1°)	29°−2°	0%	2 mph3 km/h from ENE, gusts 4 mph6 km/h	88%	83%	0
Mon 2a	Cloudy	28°−2° (likely 28°−2° to 34°1°)	28°−2°	0%	2 mph3 km/h from ENE, gusts 3 mph4 km/h	89%	85%	0
Mon 3a	Cloudy	27°−3° (likely 27°−3° to 34°1°)	27°−3°	0%	2 mph3 km/h from S, gusts 2 mph3 km/h	89%	91%	0
Mon 4a	Cloudy	26°−3° (likely 26°−3° to 33°1°)	26°−3°	0%	2 mph3 km/h from S, gusts 2 mph4 km/h	90%	92%	0
Mon 5a	Cloudy	25°−4° (likely 25°−4° to 33°1°)	25°−4°	0%	2 mph3 km/h from S, gusts 3 mph4 km/h	91%	90%	0
Mon 6a	Cloudy	24°−4° (likely 24°−4° to 33°1°)	24°−4°	0%	2 mph3 km/h from SSE, gusts 3 mph5 km/h	92%	91%	0
Mon 7a	Cloudy	24°−4° (likely 24°−4° to 34°1°)	24°−4°	0%	2 mph3 km/h from SSE, gusts 3 mph5 km/h	96%	90%	0
Mon 8a	Mostly cloudy	24°−4° (likely 24°−4° to 34°1°)	24°−4°	0%	2 mph3 km/h from SSE, gusts 3 mph5 km/h	99%	87%	0
Mon 9a	Mostly cloudy	25°−4° (likely 25°−4° to 36°2°)	25°−4°	0%	2 mph3 km/h from SSE, gusts 4 mph6 km/h	99%	87%	0
Mon 10a	Cloudy	30°−1° (likely 28°−2° to 39°4°)	30°−1°	0%	2 mph3 km/h from SSE, gusts 5 mph7 km/h	93%	83%	1
Mon 11a	Mostly cloudy	35°2° (likely 32°0° to 42°6°)	35°2°	0%	2 mph3 km/h from SSE, gusts 5 mph8 km/h	85%	69%	2

Days ahead

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

Today, Oct 24. Cloudy. High 42°6°, low 21°−6°. Typical 49°9° / 22°−6°. Dry. Mostly agree.
1. Afternoon
  noon–6 PM
  Sunny, 42°6°
  Dry
2. Evening
  6 PM–midnight
  Clear, 34°1°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 23°−5°
  Dry
Official NWS forecast
Today: Sunny, with a high near 42. South southeast wind around 3 mph.
Tonight: Mostly clear, with a low around 21. East northeast wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
39°4°–43°6°
Low, likely
21°−6°–27°−3°
Typical high / low
49°9° / 22°−6°
Wind
6 mph9 km/h
UV peak
4
Tomorrow, Oct 25. Cloudy. High 45°7°, low 23°−5°. Typical 49°9° / 22°−6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 21°−6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 44°7°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 36°2°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 25°−4°
  Dry
Official NWS forecast
Day: Patchy fog between 9am and 10am. Sunny, with a high near 45. East wind 1 to 5 mph.
Night: Mostly cloudy, with a low around 23. East wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
44°7°–47°8°
Low, likely
23°−5°–33°1°
Typical high / low
49°9° / 22°−6°
Wind
5 mph8 km/h
UV peak
4
Monday, Oct 26. Drizzle. High 50°10°, low 24°−4°. Typical 48°9° / 22°−6°. Rain 0.06 in1.5 mm, 5% chance. Mostly agree.
1. Morning
  6 AM–noon
  Mostly cloudy, 24°−4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 51°11°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 40°4°
  40% chance · 0.05 in1.2 mm
4. Overnight
  midnight–6 AM
  Drizzle, 34°1°
  50% chance · 0.03 in0.7 mm
Official NWS forecast
Day: Mostly sunny, with a high near 50. South southeast wind 2 to 8 mph.
Night: A chance of rain before 9pm, then a chance of rain and snow. Mostly cloudy, with a low around 24. South wind around 9 mph. Chance of precipitation is 50%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
48°9°–52°11°
Low, likely
24°−4°–33°1°
Typical high / low
48°9° / 22°−6°
Wind
11 mph17 km/h, gusts 21 mph34 km/h
UV peak
3
Tuesday, Oct 27. Snow. High 43°6°, low 19°−7°. Typical 48°9° / 22°−6°. Snow 0.08 in2 mm, 50% chance. Forecasts agree.
1. Morning
  6 AM–noon
  Rain, 32°0°
  40% chance · 0.06 in1.5 mm
2. Afternoon
  noon–6 PM
  Fog, 42°6°
  30% chance
3. Evening
  6 PM–midnight
  Mostly clear, 34°1°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 26°−3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow before 9am, then a chance of rain and snow. Partly sunny, with a high near 43. Southwest wind 7 to 13 mph, with gusts as high as 21 mph. Little or no snow accumulation expected.
Night: A slight chance of rain before 9pm, then a slight chance of rain and snow between 9pm and midnight. Mostly cloudy, with a low around 19. South southwest wind 5 to 8 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
40°4°–43°6°
Low, likely
19°−7°–32°0°
Typical high / low
48°9° / 22°−6°
Wind
15 mph23 km/h, gusts 23 mph36 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 44°7°, low 21°−6°. Typical 47°8° / 21°−6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 25°−4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 44°7°
  Dry
3. Evening
  6 PM–midnight
  Clear, 34°1°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 29°−2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 44.
Night: Partly cloudy, with a low around 21.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
42°6°–45°7°
Low, likely
19°−7°–31°−1°
Typical high / low
47°8° / 21°−6°
Wind
16 mph26 km/h, gusts 31 mph50 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 46°8°, low 22°−6°. Typical 47°8° / 21°−6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 29°−1°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 46°8°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Fog, 29°−2°
  30% chance · 0.02 in0.4 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 46.
Night: A slight chance of rain and snow after midnight. Partly cloudy, with a low around 22.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
45°7°–48°9°
Low, likely
22°−6°–32°0°
Typical high / low
47°8° / 21°−6°
Wind
14 mph23 km/h, gusts 27 mph43 km/h
UV peak
3
Friday, Oct 30. Snow. High 46°8°, low 22°−6°. Typical 46°8° / 20°−7°. Snow < 1 in< 2 cm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 29°−2°
  30% chance · 0.02 in0.5 mm
2. Afternoon
  noon–6 PM
  Drizzle, 41°5°
  30% chance · 0.05 in1.2 mm
3. Evening
  6 PM–midnight
  Drizzle, 34°1°
  30% chance
4. Overnight
  midnight–6 AM
  Cloudy, 26°−3°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of snow before noon, then a slight chance of rain and snow. Partly sunny, with a high near 46.
Night: A 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
38°3°–46°8°
Low, likely
19°−7°–31°−1°
Typical high / low
46°8° / 20°−7°
Wind
10 mph15 km/h, gusts 19 mph31 km/h
UV peak
2
Saturday, Oct 31. Cloudy. High 35°2°, low 22°−6°. Typical 46°8° / 20°−7°. Rain 0.03 in0.8 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 25°−4°
  20% chance · 0.01 in0.3 mm
2. Afternoon
  noon–6 PM
  Sunny, 35°2°
  Dry
3. Evening
  6 PM–midnight
  Clear, 28°−2°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 21°−6°
  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
33°1°–36°2°
Low, likely
13°−11°–28°−2°
Typical high / low
46°8° / 20°−7°
Wind
15 mph24 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 39°4°, low 21°−6°. Typical 46°8° / 20°−7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 23°−5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 40°4°
  Dry
3. Evening
  6 PM–midnight
  Clear, 32°0°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 27°−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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
35°2°–42°6°
Low, likely
11°−12°–27°−3°
Typical high / low
46°8° / 20°−7°
Wind
7 mph11 km/h, gusts 17 mph28 km/h
UV peak
4
Monday, Nov 2. Drizzle. High 39°4°, low 26°−3°. Typical 45°7° / 20°−7°. Rain 0.05 in1.3 mm, 10% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 29°−2°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 39°4°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 32°0°
  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
33°1°–46°8°
Low, likely
24°−4°–31°−1°
Typical high / low
45°7° / 20°−7°
Wind
11 mph17 km/h, gusts 32 mph52 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 42°, low 21°.
Tomorrow
Dry, high 45°, low 23°, warming up.
Monday
Dry, high 50°, low 24°, warming up.
Rest of week
Highs 35–46°; 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

Beaverhead River at Clark Canyon Dam near Dillon

10 mi

Below flood stage

Level: 5518 ft

Reading from Sat 10 AM · NWS gauge page

Beaverhead River at Dillon

25 mi

Level: 3.7 ft

Reading from Sat 10:15 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 69% less heating than a typical week.

This week 66Typical 213

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

Comfort

Dry air outside (dew point 28°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?

Dillon 18 Wsw · official normals 1991–2020 · records 2007–2026

Oct 24, today vs a typical year

Today’s expected high is 7°4° colder than typical.

Last 7 days vs normal

On average 8°4° warmer than normal (daily mean temperature).

+8°+4°SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24

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

Sun & moon

Sun

Daylight: 10 h 32 min; Losing 2 min 58 s a day; shortest Dec 21, 1 h 46 min less
Golden hour: 5:50–6:50 PM; Morning 7:41–8:41 AM
Blue hour: 6:50–7:02 PM; Morning 7:30–7:41 AM; first light 7:30 AM

Stars tonight? Fair

Clear 7:02 PM–7:31 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 6:15 AM · rises 5:32 PM
Full moon: Oct 25
New moon: Nov 9

Looking south from Grant. The highest point on the skyline is about 10,700 ft, 29 mi away.Skyline from USGS elevation data, heights drawn up to 4.5× taller. Sky, sun and moon as they are now.