Model estimate for 11:00 AM MDT (no recent station report)

Forty Mile Colony, MT weather

Sunny and 43°6°.

Mostly agree

Now 43°6°

Sunny

Wind: Calm; Up to 12 mph19 km/h through 11 PM
Dew point: 24°−4°; Dry · down to 16°−9° by 2 PM
UV index: 2Low; Moderate 12–4 PM · peak 4

None rain now, through the next 2 hours.

From forecast models

Next 48 hours

Good hours for

High 53°12° today at 4 PM
Below 40°4° tonight after 9 PM
Hard freeze tonight 1–9 AM (low 28°−2°)
Low 28°−2° tonight at 5 AM
Above 40°4° tomorrow by 11 AM

This afternoonUp to 53°12° by 4 PM · Clear
TonightDown to 28°−2° by 5 AM · freezing, low 28°−2° · Clear
Tomorrow morningUp to 43°6° by 11 AM · freezing, low 28°−2° · Clear
Tomorrow afternoonUp to 52°11° by 2 PM · Partly cloudy
Tomorrow nightDown to 33°1° by 4 AM · Mostly cloudy
Monday morningUp to 41°5° by 10 AM · 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 11a	Sunny	43°6° (likely 41°5° to 44°7°)	43°6°	0%	2 mph3 km/h from NNE, gusts 3 mph5 km/h	46%	0%	2
Sat 12p	Sunny	46°8° (likely 43°6° to 47°8°)	46°8°	0%	2 mph3 km/h from ENE, gusts 7 mph11 km/h	35%	0%	3
Sat 1p	Sunny	50°10° (likely 46°8° to 50°10°)	48°9°	0%	5 mph8 km/h from E, gusts 13 mph20 km/h	29%	0%	4
Sat 2p	Sunny	52°11° (likely 48°9° to 52°11°)	52°11°	0%	7 mph11 km/h from ESE, gusts 16 mph25 km/h	24%	0%	4
Sat 3p	Sunny	52°11° (likely 50°10° to 52°11°)	52°11°	0%	10 mph16 km/h from ESE, gusts 17 mph28 km/h	23%	0%	3
Sat 4p	Sunny	53°12° (likely 49°9° to 53°12°)	53°12°	0%	12 mph19 km/h from SE, gusts 18 mph29 km/h	23%	1%	2
Sat 5p	Sunny	52°11° (likely 48°9° to 52°11°)	52°11°	0%	10 mph16 km/h from SE, gusts 18 mph30 km/h	25%	2%	1
Sat 6p	Clear	49°9° (likely 45°7° to 49°9°)	47°8°	0%	6 mph10 km/h from ESE, gusts 13 mph21 km/h	30%	4%	0
Sat 7p	Clear	45°7° (likely 43°6° to 46°8°)	42°6°	0%	6 mph10 km/h from ESE, gusts 11 mph17 km/h	36%	6%	0
Sat 8p	Mostly clear	40°4° (likely 40°4° to 44°7°)	36°2°	0%	6 mph10 km/h from SE, gusts 9 mph15 km/h	41%	48%	0
Sat 9p	Mostly clear	39°4° (likely 39°4° to 43°6°)	35°2°	0%	6 mph10 km/h from SE, gusts 7 mph12 km/h	44%	48%	0
Sat 10p	Mostly clear	37°3° (likely 37°3° to 41°5°)	33°1°	0%	5 mph8 km/h from SSE, gusts 7 mph11 km/h	48%	21%	0
Sat 11p	Clear	35°2° (likely 35°2° to 40°4°)	32°0°	0%	3 mph5 km/h from SSE, gusts 5 mph8 km/h	52%	3%	0
Sun 12a	Clear	33°1° (likely 33°1° to 39°4°)	30°−1°	0%	3 mph5 km/h from SSE, gusts 5 mph8 km/h	57%	1%	0
Sun 1a	Clear	32°0° (likely 32°0° to 38°3°)	29°−2°	0%	3 mph5 km/h from S, gusts 4 mph7 km/h	60%	0%	0
Sun 2a	Clear	31°−1° (likely 31°−1° to 36°2°)	31°−1°	0%	2 mph3 km/h from S, gusts 6 mph9 km/h	63%	0%	0
Sun 3a	Clear	30°−1° (likely 30°−1° to 35°2°)	30°−1°	0%	2 mph3 km/h from SSE, gusts 6 mph9 km/h	69%	0%	0
Sun 4a	Clear	29°−2° (likely 29°−2° to 34°1°)	29°−2°	0%	2 mph3 km/h from SSE, gusts 6 mph9 km/h	73%	0%	0
Sun 5a	Clear	28°−2° (likely 28°−2° to 34°1°)	28°−2°	0%	1 mph2 km/h from SSE, gusts 5 mph9 km/h	73%	0%	0
Sun 6a	Clear	28°−2° (likely 28°−2° to 34°1°)	28°−2°	0%	1 mph2 km/h from SSE, gusts 4 mph6 km/h	76%	0%	0
Sun 7a	Clear	28°−2° (likely 28°−2° to 35°2°)	28°−2°	0%	1 mph2 km/h from SSE, gusts 3 mph5 km/h	77%	0%	0
Sun 8a	Sunny	28°−2° (likely 27°−3° to 35°2°)	28°−2°	0%	1 mph2 km/h from SSE, gusts 3 mph4 km/h	80%	0%	0
Sun 9a	Sunny	33°1° (likely 30°−1° to 37°3°)	33°1°	0%	2 mph3 km/h from SW, gusts 3 mph5 km/h	72%	0%	0
Sun 10a	Sunny	39°4° (likely 37°3° to 41°5°)	39°4°	0%	2 mph3 km/h from SW, gusts 4 mph6 km/h	60%	39%	1
Sun 11a	Sunny	43°6° (likely 41°5° to 45°7°)	43°6°	0%	2 mph3 km/h from SW, gusts 4 mph7 km/h	49%	41%	2
Sun 12p	Sunny	47°8° (likely 44°7° to 49°9°)	46°8°	0%	3 mph5 km/h from N, gusts 5 mph8 km/h	42%	43%	3
Sun 1p	Sunny	50°10° (likely 46°8° to 51°11°)	49°9°	0%	3 mph5 km/h from N, gusts 7 mph11 km/h	39%	46%	4
Sun 2p	Partly sunny	52°11° (likely 47°8° to 52°11°)	52°11°	0%	3 mph5 km/h from N, gusts 8 mph13 km/h	35%	46%	4
Sun 3p	Sunny	51°11° (likely 49°9° to 53°12°)	51°11°	5%	5 mph8 km/h from E, gusts 10 mph16 km/h	34%	25%	3
Sun 4p	Sunny	52°11° (likely 49°9° to 53°12°)	52°11°	5%	5 mph8 km/h from E, gusts 8 mph14 km/h	36%	21%	2
Sun 5p	Cloudy	50°10° (likely 48°9° to 53°12°)	49°9°	5%	5 mph8 km/h from E, gusts 11 mph18 km/h	38%	73%	1
Sun 6p	Cloudy	48°9° (likely 44°7° to 50°10°)	47°8°	10%	3 mph5 km/h from ESE, gusts 10 mph16 km/h	48%	79%	0
Sun 7p	Cloudy	45°7° (likely 42°6° to 48°9°)	43°6°	10%	3 mph5 km/h from ESE, gusts 11 mph18 km/h	58%	95%	0
Sun 8p	Cloudy	41°5° (likely 41°5° to 46°8°)	39°4°	10%	3 mph5 km/h from ESE, gusts 14 mph22 km/h	66%	89%	0
Sun 9p	Cloudy	40°4° (likely 40°4° to 44°7°)	35°2°	10%	7 mph11 km/h from SE, gusts 12 mph19 km/h	69%	97%	0
Sun 10p	Cloudy	39°4° (likely 39°4° to 44°7°)	34°1°	10%	7 mph11 km/h from SE, gusts 12 mph20 km/h	76%	81%	0
Sun 11p	Cloudy	37°3° (likely 37°3° to 44°7°)	32°0°	10%	7 mph11 km/h from SE, gusts 11 mph18 km/h	81%	76%	0
Mon 12a	Cloudy	36°2° (likely 36°2° to 44°7°)	32°0°	5%	5 mph8 km/h from SE, gusts 10 mph17 km/h	87%	74%	0
Mon 1a	Cloudy	35°2° (likely 35°2° to 42°6°)	31°−1°	5%	5 mph8 km/h from SE, gusts 8 mph14 km/h	90%	75%	0
Mon 2a	Cloudy	34°1° (likely 34°1° to 42°6°)	30°−1°	5%	5 mph8 km/h from SE, gusts 8 mph14 km/h	94%	77%	0
Mon 3a	Cloudy	34°1° (likely 34°1° to 42°6°)	31°−1°	5%	3 mph5 km/h from SE, gusts 8 mph13 km/h	98%	78%	0
Mon 4a	Cloudy	33°1° (likely 33°1° to 42°6°)	30°−1°	5%	3 mph5 km/h from SE, gusts 8 mph12 km/h	100%	74%	0
Mon 5a	Cloudy	33°1° (likely 32°0° to 42°6°)	30°−1°	5%	3 mph5 km/h from SE, gusts 7 mph12 km/h	100%	72%	0
Mon 6a	Cloudy	33°1° (likely 33°1° to 41°5°)	30°−1°	0%	3 mph5 km/h from SE, gusts 7 mph11 km/h	100%	82%	0
Mon 7a	Cloudy	34°1° (likely 32°0° to 42°6°)	31°−1°	0%	3 mph5 km/h from SE, gusts 5 mph8 km/h	100%	90%	0
Mon 8a	Cloudy	35°2° (likely 33°1° to 42°6°)	32°0°	0%	3 mph5 km/h from SE, gusts 4 mph7 km/h	99%	92%	0
Mon 9a	Cloudy	37°3° (likely 35°2° to 44°7°)	33°1°	0%	5 mph8 km/h from SE, gusts 6 mph9 km/h	95%	80%	0
Mon 10a	Cloudy	41°5° (likely 39°4° to 48°9°)	38°3°	0%	5 mph8 km/h from SE, gusts 7 mph11 km/h	86%	95%	1

Days ahead

Tap a day for its hours and the official wording.

Today, Oct 24. Sunny. High 54°12°, low 28°−2°. Dry. Mostly agree.
1. Afternoon
  noon–6 PM
  Sunny, 53°12°
  Dry
2. Evening
  6 PM–midnight
  Mostly clear, 40°4°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 28°−2°
  Dry
Official NWS forecast
Today: Sunny. High near 54, with temperatures falling to around 52 in the afternoon. East wind 2 to 12 mph.
Tonight: Mostly clear, with a low around 28. South southeast wind 1 to 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
50°10°–54°12°
Low, likely
28°−2°–33°1°
Wind
20 mph31 km/h, gusts 37 mph59 km/h
UV peak
4
Tomorrow, Oct 25. Drizzle. High 52°11°, low 33°1°. Rain 0.01 in0.3 mm, 5% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 28°−2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 52°11°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 41°5°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 33°1°
  Dry
Official NWS forecast
Day: Mostly sunny. High near 52, with temperatures falling to around 50 in the afternoon. Southeast wind 1 to 5 mph.
Night: Mostly cloudy, with a low around 33. Southeast wind 3 to 7 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
49°9°–54°12°
Low, likely
27°−3°–34°1°
Wind
14 mph23 km/h, gusts 22 mph36 km/h
UV peak
4
Monday, Oct 26. Cloudy. High 56°13°, low 31°−1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 55°13°
  Dry
3. Evening
  6 PM–midnight
  Clear, 44°7°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 37°3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny. High near 56, with temperatures falling to around 54 in the afternoon. Southeast wind 3 to 8 mph.
Night: Partly cloudy, with a low around 31. Southeast wind 5 to 9 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
53°12°–57°14°
Low, likely
31°−1°–41°5°
Wind
13 mph21 km/h, gusts 22 mph35 km/h
UV peak
3
Tuesday, Oct 27. Showers. High 54°12°, low 32°0°. Rain 0.23 in5.8 mm, 60% chance. Mostly agree.
1. Morning
  6 AM–noon
  Rain, 37°3°
  50% chance · 0.2 in0.6 cm
2. Afternoon
  noon–6 PM
  Partly sunny, 53°12°
  40% chance · 0.05 in1.3 mm
3. Evening
  6 PM–midnight
  Mostly clear, 46°8°
  30% chance
4. Overnight
  midnight–6 AM
  Clear, 36°2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain showers likely. Partly sunny. High near 54, with temperatures falling to around 52 in the afternoon. South southwest wind 3 to 12 mph. Chance of precipitation is 60%.
Night: A chance of rain showers. Mostly cloudy, with a low around 32. West wind around 7 mph. Chance of precipitation is 40%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
51°11°–56°13°
Low, likely
31°−1°–39°4°
Wind
22 mph36 km/h, gusts 34 mph55 km/h
UV peak
2
Wednesday, Oct 28. Partly sunny. High 57°14°, low 29°−2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 58°15°
  Dry
3. Evening
  6 PM–midnight
  Clear, 44°7°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 33°1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny. High near 57, with temperatures falling to around 54 in the afternoon. West northwest wind around 7 mph.
Night: Partly cloudy, with a low around 29. Southeast wind around 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
56°13°–59°15°
Low, likely
29°−2°–39°4°
Wind
15 mph24 km/h, gusts 30 mph48 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 54°12°, low 29°−2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 33°0°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 56°13°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 45°7°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 35°1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny. High near 54, with temperatures falling to around 51 in the afternoon. Southeast wind around 3 mph.
Night: Mostly cloudy, with a low around 29. Southeast wind around 2 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
46°8°–61°16°
Low, likely
26°−3°–38°3°
Wind
13 mph21 km/h, gusts 24 mph38 km/h
UV peak
3
Friday, Oct 30. Cloudy. High 55°13°, low 31°−1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 48°9°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 41°5°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 36°2°
  20% chance · 0.02 in0.4 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny. High near 55, with temperatures falling to around 53 in the afternoon. West northwest wind around 3 mph.
Night: A slight chance of rain showers before 9pm, then a slight chance of rain and snow showers. Mostly cloudy, with a low around 31. West northwest wind around 2 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
40°4°–58°14°
Low, likely
27°−3°–41°5°
Wind
9 mph14 km/h, gusts 17 mph27 km/h
UV peak
3
Saturday, Oct 31. Drizzle. High 44°7°, low 33°1°. Rain 0.06 in1.5 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Snow, 37°3°
  20% chance · 0.06 in1.4 mm
2. Afternoon
  noon–6 PM
  Drizzle, 42°5°
  20% chance · 0.02 in0.4 mm
3. Evening
  6 PM–midnight
  Drizzle, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 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
38°3°–52°11°
Low, likely
22°−6°–42°6°
Wind
10 mph16 km/h, gusts 19 mph30 km/h
UV peak
2
Sunday, Nov 1. Cloudy. High 46°8°, low 30°−1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 32°0°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 45°7°
  Dry
3. Evening
  6 PM–midnight
  Clear, 38°3°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 38°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°–51°11°
Low, likely
17°−8°–35°2°
Wind
22 mph36 km/h, gusts 39 mph63 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 52°11°, low 35°2°. Rain 0.29 in7.4 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 42°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 52°11°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 42°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
39°4°–65°18°
Low, likely
32°0°–39°4°
Wind
9 mph14 km/h, gusts 16 mph26 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 54°, low 28°.
Tomorrow
Dry, high 52°, low 33°.
Monday
Dry, high 56°, low 31°, warming up.
Rest of week
Highs 44–57°; 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

Rosebud Creek at Reservation Boundary near Kirby

19 mi

Level: 3.3 ft
Flow: 16 cfs

Reading from Sat 9:45 AM · NWS gauge page

Bighorn River at ST. Xavier Bridge

23 mi

Level: 6.1 ft
Flow: 1,680 cfs

Reading from Sat 9:30 AM · NWS gauge page

Little Bighorn River at State Line near Wyola

23 mi

Level: 2.0 ft
Flow: 80 cfs

Reading from Sat 10 AM · NWS gauge page

Sun & moon

Sun

Daylight: 10 h 31 min; Losing 2 min 58 s a day; shortest Dec 21, 1 h 47 min less
Golden hour: 5:27–6:27 PM; Morning 7:19–8:19 AM
Blue hour: 6:27–6:39 PM; Morning 7:07–7:19 AM; first light 7:07 AM

Stars tonight? Fair

Clear 10 PM–7:08 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:52 AM · rises 5:09 PM
Full moon: Oct 25
New moon: Nov 9

Looking south from Forty Mile Colony. The highest point on the skyline is about 12,800 ft, 63 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.