Observed 2:55 PM MDT at KGFA

Big Stone Colony, MT weather

Mostly sunny and 39°4°, 14°8° colder than usual, freeze watch tonight, low 24°−4°.

Mostly agree

Now 39°4°

Mostly sunny · Feels like 36°2°

Wind: 5 mph8 km/h; From the east. Light through 4 AM
Dew point: 30°−1°; Dry, static shocks likely
UV tomorrow: 4Moderate; Moderate 12–5 PM · peak 4
Pressure: 30.19 inHg1022 hPa; Falling · −0.06 inHg−2.1 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

5°3° warmer than this time yesterday (34°1° then, 39°4° now)

Good hours for

Hard freeze tonight 10 PM–noon (low 24°−4°)
Low 24°−4° tomorrow at 8 AM
Hard freeze tomorrow night 7 PM–11 AM (low 23°−5°)

This afternoonNear 39°4° · Clear
TonightDown to 25°−4° by 5 AM · freezing, low 25°−4° · Partly cloudy
Tomorrow morningUp to 31°−1° by 11 AM · freezing, low 24°−4° · Partly cloudy
Tomorrow afternoonUp to 37°3° by 4 PM · Mostly cloudy
Tomorrow nightDown to 26°−3° by 3 AM · freezing, low 26°−3° · Mostly cloudy
Monday morningUp to 33°1° by 11 AM · freezing, low 23°−5° · Mostly cloudy
Monday afternoonNear 38°3° · 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
Sat 4p	Sunny	39°4° (likely 39°4° to 44°7°)	37°3°	0%	3 mph5 km/h from SSE, gusts 17 mph27 km/h	63%	1%	2
Sat 5p	Sunny	39°4° (likely 38°3° to 44°7°)	37°3°	0%	3 mph5 km/h from ESE, gusts 10 mph16 km/h	63%	0%	1
Sat 6p	Clear	37°3° (likely 35°2° to 41°5°)	34°1°	0%	3 mph5 km/h from ESE, gusts 6 mph9 km/h	64%	0%	0
Sat 7p	Clear	36°2° (likely 33°1° to 37°3°)	33°1°	0%	3 mph5 km/h from ESE, gusts 3 mph5 km/h	66%	5%	0
Sat 8p	Mostly clear	34°1° (likely 29°−2° to 35°2°)	34°1°	0%	2 mph3 km/h from ESE, gusts 4 mph6 km/h	70%	39%	0
Sat 9p	Partly cloudy	33°1° (likely 27°−3° to 34°1°)	33°1°	0%	2 mph3 km/h from ESE, gusts 3 mph4 km/h	72%	34%	0
Sat 10p	Partly cloudy	32°0° (likely 27°−3° to 34°1°)	32°0°	0%	1 mph2 km/h from SE, gusts 2 mph4 km/h	74%	59%	0
Sat 11p	Mostly clear	32°0° (likely 28°−2° to 34°1°)	32°0°	0%	0 mph0 km/h, gusts 2 mph3 km/h	74%	38%	0
Sun 12a	Clear	30°−1° (likely 27°−3° to 34°1°)	30°−1°	0%	0 mph0 km/h, gusts 2 mph3 km/h	74%	22%	0
Sun 1a	Partly cloudy	29°−2° (likely 26°−3° to 33°1°)	29°−2°	0%	0 mph0 km/h, gusts 2 mph4 km/h	78%	26%	0
Sun 2a	Clear	28°−2° (likely 26°−3° to 33°1°)	28°−2°	0%	1 mph2 km/h from NNW, gusts 3 mph4 km/h	84%	29%	0
Sun 3a	Mostly clear	27°−3° (likely 25°−4° to 32°0°)	27°−3°	0%	1 mph2 km/h from NNW, gusts 4 mph6 km/h	85%	29%	0
Sun 4a	Clear	27°−3° (likely 25°−4° to 31°−1°)	27°−3°	0%	2 mph3 km/h from WNW, gusts 5 mph8 km/h	83%	33%	0
Sun 5a	Mostly clear	25°−4° (likely 24°−4° to 31°−1°)	25°−4°	0%	2 mph3 km/h from W, gusts 6 mph9 km/h	84%	36%	0
Sun 6a	Clear	25°−4° (likely 24°−4° to 31°−1°)	25°−4°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	84%	26%	0
Sun 7a	Mostly cloudy	25°−4° (likely 24°−4° to 31°−1°)	25°−4°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	85%	51%	0
Sun 8a	Mostly cloudy	24°−4° (likely 24°−4° to 31°−1°)	24°−4°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	85%	64%	0
Sun 9a	Cloudy	26°−3° (likely 25°−4° to 31°−1°)	26°−3°	0%	2 mph3 km/h from W, gusts 4 mph7 km/h	85%	68%	0
Sun 10a	Cloudy	29°−2° (likely 27°−3° to 31°−1°)	29°−2°	0%	1 mph2 km/h from W, gusts 5 mph7 km/h	80%	75%	1
Sun 11a	Cloudy	31°−1° (likely 29°−2° to 32°0°)	31°−1°	0%	1 mph2 km/h from W, gusts 5 mph7 km/h	72%	76%	2
Sun 12p	Cloudy	33°1° (likely 30°−1° to 33°1°)	33°1°	0%	1 mph2 km/h from WNW, gusts 5 mph7 km/h	70%	82%	3
Sun 1p	Cloudy	34°1° (likely 31°−1° to 34°1°)	34°1°	0%	1 mph2 km/h from NNW, gusts 5 mph7 km/h	69%	82%	4
Sun 2p	Cloudy	35°2° (likely 32°0° to 35°2°)	35°2°	0%	1 mph2 km/h from N, gusts 4 mph6 km/h	67%	80%	4
Sun 3p	Cloudy	36°2° (likely 33°1° to 36°2°)	36°2°	0%	1 mph2 km/h from NNE, gusts 5 mph7 km/h	66%	78%	4
Sun 4p	Cloudy	37°3° (likely 34°1° to 37°3°)	37°3°	0%	1 mph2 km/h from NE, gusts 7 mph11 km/h	66%	75%	3
Sun 5p	Cloudy	36°2° (likely 34°1° to 36°2°)	36°2°	0%	0 mph0 km/h, gusts 8 mph12 km/h	66%	78%	2
Sun 6p	Cloudy	34°1° (likely 31°−1° to 36°2°)	34°1°	0%	0 mph0 km/h, gusts 7 mph12 km/h	68%	78%	1
Sun 7p	Partly cloudy	32°0° (likely 30°−1° to 35°2°)	32°0°	0%	0 mph0 km/h, gusts 5 mph8 km/h	72%	77%	0
Sun 8p	Partly cloudy	29°−2° (likely 29°−2° to 34°1°)	29°−2°	0%	0 mph0 km/h, gusts 6 mph10 km/h	77%	82%	0
Sun 9p	Cloudy	29°−2° (likely 28°−2° to 34°1°)	29°−2°	0%	2 mph3 km/h from SSW, gusts 5 mph7 km/h	80%	87%	0
Sun 10p	Partly cloudy	28°−2° (likely 27°−3° to 33°1°)	28°−2°	0%	2 mph3 km/h from SSW, gusts 4 mph6 km/h	82%	78%	0
Sun 11p	Cloudy	28°−2° (likely 26°−3° to 32°0°)	28°−2°	0%	2 mph3 km/h from SSW, gusts 4 mph6 km/h	82%	90%	0
Mon 12a	Cloudy	27°−3° (likely 25°−4° to 32°0°)	27°−3°	0%	2 mph3 km/h from S, gusts 4 mph6 km/h	80%	82%	0
Mon 1a	Cloudy	27°−3° (likely 25°−4° to 32°0°)	27°−3°	0%	2 mph3 km/h from S, gusts 4 mph6 km/h	82%	84%	0
Mon 2a	Cloudy	27°−3° (likely 25°−4° to 32°0°)	27°−3°	0%	2 mph3 km/h from S, gusts 4 mph7 km/h	82%	84%	0
Mon 3a	Cloudy	26°−3° (likely 25°−4° to 32°0°)	26°−3°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	82%	90%	0
Mon 4a	Partly cloudy	26°−3° (likely 25°−4° to 32°0°)	26°−3°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	80%	90%	0
Mon 5a	Cloudy	26°−3° (likely 25°−4° to 32°0°)	26°−3°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	80%	90%	0
Mon 6a	Cloudy	23°−5° (likely 23°−5° to 32°0°)	23°−5°	0%	1 mph2 km/h from SSW, gusts 2 mph4 km/h	79%	92%	0
Mon 7a	Cloudy	25°−4° (likely 25°−4° to 32°0°)	25°−4°	0%	1 mph2 km/h from SSW, gusts 2 mph3 km/h	80%	93%	0
Mon 8a	Cloudy	26°−3° (likely 25°−4° to 32°0°)	26°−3°	0%	1 mph2 km/h from SSW, gusts 2 mph3 km/h	80%	92%	0
Mon 9a	Partly sunny	27°−3° (likely 26°−3° to 32°0°)	27°−3°	0%	1 mph2 km/h from SSW, gusts 2 mph4 km/h	79%	87%	0
Mon 10a	Partly sunny	29°−2° (likely 28°−2° to 33°1°)	29°−2°	0%	1 mph2 km/h from SSW, gusts 3 mph4 km/h	76%	77%	1
Mon 11a	Cloudy	33°1° (likely 31°−1° to 35°2°)	33°1°	0%	1 mph2 km/h from SSW, gusts 4 mph6 km/h	71%	66%	2
Mon 12p	Cloudy	36°2° (likely 34°1° to 37°3°)	36°2°	0%	0 mph0 km/h, gusts 4 mph7 km/h	68%	55%	4
Mon 1p	Partly sunny	37°3° (likely 33°1° to 39°4°)	37°3°	0%	0 mph0 km/h, gusts 5 mph8 km/h	67%	47%	4
Mon 2p	Partly sunny	38°3° (likely 34°1° to 40°4°)	38°3°	0%	0 mph0 km/h, gusts 6 mph10 km/h	67%	57%	4
Mon 3p	Cloudy	39°4° (likely 34°1° to 41°5°)	37°3°	0%	3 mph5 km/h from E, gusts 7 mph12 km/h	68%	76%	4

Days ahead

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

Today, Oct 24. Partly sunny. High 39°4°, low 23°−5°. Typical 53°12° / 30°−1°. Dry. Mostly agree.
1. Afternoon
  noon–6 PM
  Sunny, 39°4°
  Dry
2. Evening
  6 PM–midnight
  Partly cloudy, 34°1°
  Dry
3. Overnight
  midnight–6 AM
  Mostly clear, 25°−4°
  Dry
Official NWS forecast
Today: Sunny, with a high near 39. Southeast wind around 3 mph.
Tonight: Partly cloudy, with a low around 23. East northeast wind 0 to 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
39°4°–45°7°
Low, likely
22°−6°–26°−3°
Typical high / low
53°12° / 30°−1°
Wind
17 mph28 km/h, gusts 29 mph47 km/h
UV peak
4
Tomorrow, Oct 25. Mostly cloudy. High 37°3°, low 21°−6°. Typical 52°11° / 29°−2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 24°−4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 37°3°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 29°−2°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 26°−3°
  Dry
Official NWS forecast
Day: Partly sunny, with a high near 37. North northwest wind around 2 mph.
Night: Mostly cloudy, with a low around 21. South southwest wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
34°1°–37°3°
Low, likely
21°−6°–31°−1°
Typical high / low
52°11° / 29°−2°
Wind
6 mph10 km/h, gusts 11 mph18 km/h
UV peak
4
Monday, Oct 26. Partly sunny. High 39°4°, low 28°−2°. Typical 52°11° / 29°−2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 26°−3°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 39°4°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 34°1°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 32°0°
  20% chance · 0.04 in1.1 mm
Official NWS forecast
Day: Mostly sunny, with a high near 39. East wind 0 to 3 mph.
Night: A slight chance of rain and snow after midnight. Mostly cloudy, with a low around 28. Southwest wind 0 to 5 mph. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
35°2°–41°5°
Low, likely
25°−4°–31°−1°
Typical high / low
52°11° / 29°−2°
Wind
7 mph12 km/h
UV peak
4
Tuesday, Oct 27. Rain. High 45°7°, low 31°−1°. Typical 52°11° / 29°−2°. Rain 0.21 in5.3 mm, 50% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 35°2°
  40% chance · 0.04 in1.1 mm
2. Afternoon
  noon–6 PM
  Drizzle, 45°7°
  30% chance · 0.11 in2.8 mm
3. Evening
  6 PM–midnight
  Drizzle, 41°5°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 38°3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Mostly cloudy, with a high near 45. Southwest wind 6 to 22 mph, with gusts as high as 33 mph.
Night: Mostly cloudy, with a low around 31. Southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
40°4°–50°10°
Low, likely
27°−3°–34°1°
Typical high / low
52°11° / 29°−2°
Wind
27 mph43 km/h, gusts 44 mph70 km/h
UV peak
1
Wednesday, Oct 28. Partly sunny. High 46°8°, low 27°−3°. Typical 51°11° / 28°−2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 50°10°
  Dry
3. Evening
  6 PM–midnight
  Clear, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 31°−1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 46.
Night: Mostly cloudy, with a low around 27.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
46°8°–52°11°
Low, likely
27°−3°–38°3°
Typical high / low
51°11° / 28°−2°
Wind
18 mph30 km/h, gusts 30 mph48 km/h
UV peak
4
Thursday, Oct 29. Mostly cloudy. High 39°4°, low 25°−4°. Typical 51°11° / 28°−2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 30°−1°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 39°4°
  Dry
3. Evening
  6 PM–midnight
  Snow, 34°1°
  40% chance · 0.1 in0.3 cm
4. Overnight
  midnight–6 AM
  Snow, 29°−1°
  40% 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 39.
Night: A 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
37°3°–43°6°
Low, likely
25°−4°–32°0°
Typical high / low
51°11° / 28°−2°
Wind
8 mph13 km/h, gusts 14 mph23 km/h
UV peak
3
Friday, Oct 30. Snow. High 41°5°, low 26°−3°. Typical 50°10° / 28°−2°. Snow 0–1 in0–3 cm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 29°−2°
  40% chance
2. Afternoon
  noon–6 PM
  Drizzle, 38°3°
  30% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Snow, 33°1°
  20% chance · 0.2 in0.4 cm
4. Overnight
  midnight–6 AM
  Cloudy, 29°−2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow before noon, then a slight chance of rain and snow. Partly sunny, with a high near 41. Little or no snow accumulation expected.
Night: A chance of snow before midnight. Mostly cloudy, with a low around 26. New snow accumulation of less than half an inch possible.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
32°0°–42°6°
Low, likely
23°−5°–32°0°
Typical high / low
50°10° / 28°−2°
Wind
8 mph12 km/h, gusts 15 mph25 km/h
UV peak
2
Saturday, Oct 31. Snow. High 39°4°, low 27°−3°. Typical 50°10° / 28°−2°. Snow 0.03 in0.8 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 29°−2°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 37°3°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 35°2°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 33°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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
37°3°–43°6°
Low, likely
16°−9°–36°2°
Typical high / low
50°10° / 28°−2°
Wind
20 mph32 km/h, gusts 31 mph49 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 43°6°, low 30°−1°. Typical 49°9° / 27°−3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 44°6°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 38°3°
  Dry
4. Overnight
  midnight–6 AM
  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
38°3°–49°9°
Low, likely
30°−1°–31°−1°
Typical high / low
49°9° / 27°−3°
Wind
18 mph29 km/h, gusts 32 mph52 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 47°8°, low 33°1°. Typical 49°9° / 27°−3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 47°9°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 40°5°
  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
41°5°–53°12°
Low, likely
28°−2°–37°3°
Typical high / low
49°9° / 27°−3°
Wind
32 mph51 km/h, gusts 62 mph100 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 39°, low 23°.
Tomorrow
Dry, high 37°, low 21°.
Monday
Dry, high 39°, low 28°.
Rest of week
Highs 39–47°; 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

Missouri River near Ulm

8.7 mi

Below flood stage

Level: 3.2 ft
Flow: 3,720 cfs

Reading from Sat 1:30 PM · NWS gauge page

Missouri River near Great Falls

15 mi

Level: 3.1 ft
Flow: 4,740 cfs

Reading from Sat 2:45 PM · NWS gauge page

Sun River near Vaughn

17 mi

Below flood stage

Level: 2.6 ft
Flow: 624 cfs

Reading from Sat 2 PM · NWS gauge page

Smith River (MT) near Eden

17 mi

Level: 3.0 ft
Flow: 137 cfs

Reading from Sat 2:45 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: 24°−4°

Overnight low near 24°F — not yet at drip-the-faucets cold, but worth watching if it's forecast to drop further.

Heating this week

About 61% less heating than a typical week.

This week 68Typical 174

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

Comfort

Dry air outside (dew point 30°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?

Great Falls Airport · official normals 1991–2020 · records 1891–2026

Oct 24, today vs a typical year

Today’s expected high is 14°8° colder than typical.

Last 7 days vs normal

On average 7°4° warmer than normal (daily mean temperature).

+4°+2°SunOct 18
+10°+6°MonOct 19
+3°+1°TueOct 20
+11°+6°WedOct 21
+14°+8°ThuOct 22
±0°FriOct 23
—SatOct 24

Big Stone Colony weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 24 min; Losing 3 min 12 s a day; shortest Dec 21, 1 h 56 min less
Golden hour: 5:37–6:39 PM; Morning 7:37–8:40 AM
Blue hour: 6:39–6:51 PM; Morning 7:25–7:37 AM; first light 7:25 AM

Stars tonight? Fair

Mostly clear 6:51–8 PM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 6:10 AM · rises 5:21 PM
Full moon: Oct 25
New moon: Nov 9

Looking southeast from Big Stone Colony. The highest point on the skyline is about 9,100 ft, 41 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.