Observed 6:35 PM MDT at KEKS

Big Sky, MT weather

Clear and 39°4°.

Forecasts differ

Now 39°4°

Clear

Wind: Calm; Light through 7 AM
Dew point: 30°−1°; Dry · down to 22°−6° by 8 PM
UV tomorrow: 4Moderate; Moderate 12–5 PM · peak 4
Pressure: 30.24 inHg1024 hPa; Rising slowly · +0.02 inHg+0.6 hPa in 3 h

Light snow now, through the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Hard freeze tonight 10 PM–11 AM (low 23°−5°)
Above 40°4° tomorrow by noon
Below 40°4° tomorrow night after 7 PM
Hard freeze tomorrow night 10 PM–11 AM (low 25°−4°)
Rain Monday night from 6 PM (50%)

TonightDown to 25°−4° by 5 AM · freezing, low 25°−4° · Clear
Tomorrow morningUp to 36°2° by 11 AM · freezing, low 23°−5° · Clear
Tomorrow afternoonUp to 49°9° by 3 PM · Clear
Tomorrow nightDown to 26°−3° by 5 AM · freezing, low 26°−3° · Partly cloudy
Monday morningUp to 38°3° by 11 AM · freezing, low 25°−4° · Mostly cloudy
Monday afternoonUp to 49°9° by 3 PM · 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 7p	Clear	38°3° (likely 30°−1° to 38°3°)	38°3°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	57%	0%	0
Sat 8p	Clear	33°1° (likely 28°−2° to 35°2°)	33°1°	0%	2 mph3 km/h from ESE, gusts 5 mph7 km/h	64%	0%	0
Sat 9p	Clear	33°1° (likely 27°−3° to 34°1°)	30°−1°	0%	3 mph5 km/h from E, gusts 5 mph8 km/h	66%	0%	0
Sat 10p	Clear	32°0° (likely 26°−3° to 33°1°)	32°0°	0%	2 mph3 km/h from SSE, gusts 4 mph7 km/h	69%	0%	0
Sat 11p	Clear	30°−1° (likely 26°−3° to 32°0°)	30°−1°	0%	2 mph3 km/h from SSW, gusts 4 mph6 km/h	73%	0%	0
Sun 12a	Clear	29°−2° (likely 25°−4° to 32°0°)	29°−2°	0%	2 mph3 km/h from SSE, gusts 5 mph8 km/h	73%	0%	0
Sun 1a	Clear	28°−2° (likely 25°−4° to 31°−1°)	28°−2°	0%	2 mph3 km/h from SSE, gusts 5 mph8 km/h	78%	0%	0
Sun 2a	Clear	28°−2° (likely 25°−4° to 31°−1°)	28°−2°	0%	1 mph2 km/h from ESE, gusts 5 mph8 km/h	76%	0%	0
Sun 3a	Clear	27°−3° (likely 25°−4° to 31°−1°)	27°−3°	0%	1 mph2 km/h from E, gusts 5 mph8 km/h	78%	0%	0
Sun 4a	Clear	27°−3° (likely 24°−4° to 30°−1°)	27°−3°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	78%	0%	0
Sun 5a	Clear	25°−4° (likely 24°−4° to 30°−1°)	25°−4°	0%	1 mph2 km/h from N, gusts 5 mph8 km/h	85%	0%	0
Sun 6a	Clear	25°−4° (likely 24°−4° to 30°−1°)	25°−4°	0%	0 mph0 km/h, gusts 4 mph7 km/h	83%	0%	0
Sun 7a	Clear	24°−4° (likely 23°−5° to 30°−1°)	24°−4°	0%	0 mph0 km/h, gusts 5 mph7 km/h	90%	0%	0
Sun 8a	Sunny	23°−5° (likely 23°−5° to 30°−1°)	23°−5°	0%	0 mph0 km/h, gusts 5 mph8 km/h	90%	0%	0
Sun 9a	Sunny	25°−4° (likely 25°−4° to 32°0°)	25°−4°	0%	0 mph0 km/h, gusts 5 mph7 km/h	89%	0%	0
Sun 10a	Sunny	32°0° (likely 32°0° to 37°3°)	32°0°	0%	0 mph0 km/h, gusts 3 mph6 km/h	77%	0%	1
Sun 11a	Sunny	36°2° (likely 36°2° to 42°6°)	36°2°	0%	0 mph0 km/h, gusts 5 mph8 km/h	67%	0%	2
Sun 12p	Sunny	41°5° (likely 40°4° to 47°8°)	41°5°	0%	0 mph0 km/h, gusts 6 mph10 km/h	57%	2%	3
Sun 1p	Sunny	45°7° (likely 42°6° to 50°10°)	45°7°	0%	0 mph0 km/h, gusts 9 mph14 km/h	51%	6%	4
Sun 2p	Sunny	47°8° (likely 43°6° to 53°12°)	47°8°	0%	0 mph0 km/h, gusts 11 mph18 km/h	42%	8%	4
Sun 3p	Sunny	49°9° (likely 43°6° to 53°12°)	49°9°	0%	2 mph3 km/h from E, gusts 11 mph18 km/h	39%	9%	4
Sun 4p	Sunny	48°9° (likely 43°6° to 53°12°)	48°9°	0%	2 mph3 km/h from E, gusts 11 mph18 km/h	39%	9%	3
Sun 5p	Sunny	47°8° (likely 40°4° to 51°11°)	47°8°	0%	2 mph3 km/h from NE, gusts 11 mph18 km/h	43%	10%	2
Sun 6p	Clear	42°6° (likely 36°2° to 47°8°)	42°6°	0%	1 mph2 km/h from E, gusts 9 mph15 km/h	56%	10%	1
Sun 7p	Partly cloudy	37°3° (likely 32°0° to 41°5°)	37°3°	0%	1 mph2 km/h from E, gusts 10 mph15 km/h	61%	24%	0
Sun 8p	Clear	34°1° (likely 30°−1° to 38°3°)	34°1°	0%	1 mph2 km/h from E, gusts 8 mph13 km/h	67%	40%	0
Sun 9p	Clear	33°1° (likely 28°−2° to 38°3°)	33°1°	0%	2 mph3 km/h from SE, gusts 7 mph12 km/h	69%	40%	0
Sun 10p	Clear	32°0° (likely 27°−3° to 37°3°)	32°0°	0%	2 mph3 km/h from SE, gusts 7 mph11 km/h	74%	40%	0
Sun 11p	Clear	30°−1° (likely 27°−3° to 36°2°)	30°−1°	0%	2 mph3 km/h from SE, gusts 7 mph11 km/h	79%	40%	0
Mon 12a	Clear	29°−2° (likely 27°−3° to 36°2°)	29°−2°	0%	2 mph3 km/h from SSE, gusts 7 mph11 km/h	81%	41%	0
Mon 1a	Clear	29°−2° (likely 27°−3° to 35°2°)	29°−2°	0%	2 mph3 km/h from SSE, gusts 7 mph12 km/h	86%	41%	0
Mon 2a	Partly cloudy	29°−2° (likely 27°−3° to 35°2°)	29°−2°	0%	2 mph3 km/h from SSE, gusts 7 mph12 km/h	83%	42%	0
Mon 3a	Partly cloudy	27°−3° (likely 27°−3° to 35°2°)	27°−3°	0%	2 mph3 km/h from SE, gusts 7 mph11 km/h	85%	44%	0
Mon 4a	Partly cloudy	27°−3° (likely 27°−3° to 35°2°)	27°−3°	0%	2 mph3 km/h from SE, gusts 7 mph11 km/h	85%	45%	0
Mon 5a	Partly cloudy	26°−3° (likely 26°−3° to 34°1°)	26°−3°	0%	2 mph3 km/h from SE, gusts 7 mph11 km/h	91%	45%	0
Mon 6a	Partly cloudy	25°−4° (likely 25°−4° to 34°1°)	25°−4°	0%	2 mph3 km/h from SSE, gusts 7 mph12 km/h	89%	63%	0
Mon 7a	Partly cloudy	26°−3° (likely 26°−3° to 34°1°)	26°−3°	0%	2 mph3 km/h from SSE, gusts 7 mph12 km/h	93%	62%	0
Mon 8a	Partly sunny	27°−3° (likely 27°−3° to 34°1°)	27°−3°	0%	2 mph3 km/h from SSE, gusts 7 mph12 km/h	95%	62%	0
Mon 9a	Cloudy	28°−2° (likely 28°−2° to 35°2°)	28°−2°	0%	2 mph3 km/h from SSE, gusts 8 mph13 km/h	93%	69%	0
Mon 10a	Partly sunny	32°0° (likely 32°0° to 41°5°)	32°0°	0%	2 mph3 km/h from SSE, gusts 9 mph15 km/h	85%	71%	1
Mon 11a	Cloudy	38°3° (likely 38°3° to 44°7°)	38°3°	0%	2 mph3 km/h from SSE, gusts 12 mph19 km/h	73%	72%	2
Mon 12p	Sunny	43°6° (likely 43°6° to 48°9°)	41°5°	0%	3 mph5 km/h from S, gusts 16 mph26 km/h	62%	61%	3
Mon 1p	Partly sunny	46°8° (likely 45°7° to 48°9°)	45°7°	0%	3 mph5 km/h from S, gusts 18 mph29 km/h	54%	78%	3
Mon 2p	Partly sunny	48°9° (likely 46°8° to 50°10°)	47°8°	0%	3 mph5 km/h from S, gusts 18 mph30 km/h	49%	63%	3
Mon 3p	Partly sunny	49°9° (likely 46°8° to 50°10°)	46°8°	0%	7 mph11 km/h from S, gusts 18 mph29 km/h	47%	60%	3
Mon 4p	Partly sunny	48°9° (likely 45°7° to 49°9°)	45°7°	0%	7 mph11 km/h from S, gusts 18 mph30 km/h	49%	38%	3
Mon 5p	Partly sunny	46°8° (likely 42°6° to 47°8°)	42°6°	0%	7 mph11 km/h from S, gusts 18 mph28 km/h	53%	35%	2
Mon 6p	Snow	43°6° (likely 38°3° to 44°7°)	40°4°	50%, 0.01 in0.3 mm	5 mph8 km/h from S, gusts 17 mph27 km/h	58%	38%	1

Days ahead

Tap a day for its hours and the official wording.

Today, Oct 24. Cloudy. High 45°7°, low 23°−5°. Rain, 40% chance. Forecasts differ.
1. Evening
  6 PM–midnight
  Clear, 33°1°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 25°−4°
  Dry
Official NWS forecast
Tonight: Mostly clear, with a low around 23. Southeast wind around 3 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
42°6°–47°8°
Low, likely
19°−7°–23°−5°
Wind
6 mph9 km/h, gusts 24 mph38 km/h
UV peak
4
Tomorrow, Oct 25. Fog. High 49°9°, low 24°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 23°−5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 49°9°
  Dry
3. Evening
  6 PM–midnight
  Clear, 34°1°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 26°−3°
  Dry
Official NWS forecast
Day: Patchy fog between 8am and 10am. Sunny, with a high near 49. East northeast wind around 2 mph.
Night: Partly cloudy, with a low around 24. Southeast wind around 2 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
43°6°–53°12°
Low, likely
23°−5°–29°−2°
Wind
8 mph13 km/h, gusts 22 mph35 km/h
UV peak
4
Monday, Oct 26. Partly sunny. High 49°9°, low 27°−3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 27°−3°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 49°9°
  Dry
3. Evening
  6 PM–midnight
  Snow, 37°3°
  50% chance · 0.07 in1.9 mm
4. Overnight
  midnight–6 AM
  Snow, 32°0°
  70% chance · 0.3 in0.6 cm
Official NWS forecast
Day: Mostly sunny, with a high near 49. South wind 2 to 7 mph.
Night: Rain and snow likely. Mostly cloudy, with a low around 27. South wind 3 to 7 mph. Chance of precipitation is 70%. New snow accumulation of less than half an inch possible.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
43°6°–50°10°
Low, likely
27°−3°–34°1°
Wind
11 mph17 km/h, gusts 42 mph67 km/h
UV peak
3
Tuesday, Oct 27. Snow. High 38°3°, low 20°−7°. Snow 0–3 in0–8 cm, 70% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Snow, 31°−1°
  70% chance · 0.7 in1.9 cm
2. Afternoon
  noon–6 PM
  Drizzle, 35°2°
  50% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Cloudy, 30°−1°
  30% chance · 0.01 in0.4 mm
4. Overnight
  midnight–6 AM
  Cloudy, 26°−4°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Snow likely. Mostly cloudy, with a high near 38. Southwest wind 3 to 8 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New snow accumulation of around one inch possible.
Night: A slight chance of snow before midnight. Mostly cloudy, with a low around 20. South southwest wind 3 to 7 mph, with gusts as high as 21 mph. Little or no snow accumulation expected.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
32°0°–39°4°
Low, likely
20°−7°–31°−1°
Wind
12 mph19 km/h, gusts 39 mph62 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 42°6°, low 24°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 25°−4°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 40°4°
  Dry
3. Evening
  6 PM–midnight
  Clear, 30°−1°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 28°−2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 42. South southwest wind 1 to 6 mph.
Night: Partly cloudy, with a low around 24.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
35°2°–42°6°
Low, likely
18°−8°–30°−1°
Wind
10 mph17 km/h, gusts 30 mph48 km/h
UV peak
4
Thursday, Oct 29. Snow. High 44°7°, low 26°−3°. Snow 0–1 in0–3 cm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 30°−1°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 42°5°
  20% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Cloudy, 35°1°
  40% chance
4. Overnight
  midnight–6 AM
  Cloudy, 32°0°
  50% chance · 0.2 in0.5 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow between noon and 3pm, then a chance of rain and snow. Partly sunny, with a high near 44.
Night: A chance of rain and snow. Mostly cloudy, with a low around 26. Little or no snow accumulation expected.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
38°3°–44°7°
Low, likely
22°−6°–34°1°
Wind
12 mph19 km/h, gusts 31 mph50 km/h
UV peak
4
Friday, Oct 30. Snow. High 44°7°, low 24°−4°. Snow 0–1 in0–3 cm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 33°1°
  50% chance · 0.1 in0.3 cm
2. Afternoon
  noon–6 PM
  Drizzle, 38°3°
  50% chance · 0.08 in2 mm
3. Evening
  6 PM–midnight
  Drizzle, 33°1°
  40% chance · 0.05 in1.2 mm
4. Overnight
  midnight–6 AM
  Drizzle, 30°−1°
  30% chance · 0.1 in0.3 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow before 3pm, then a chance of rain and snow. Partly sunny, with a high near 44. Little or no snow accumulation expected.
Night: A chance of rain and snow. Mostly cloudy, with a low around 24. New snow accumulation of around one inch possible.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
35°2°–44°7°
Low, likely
24°−4°–32°0°
Wind
8 mph13 km/h, gusts 32 mph52 km/h
UV peak
3
Saturday, Oct 31. Snow. High 43°6°, low 23°−5°. Snow 0–2 in0–5 cm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 30°−1°
  30% chance · 0.01 in0.3 mm
2. Afternoon
  noon–6 PM
  Partly sunny, 36°2°
  20% chance · 0.04 in1.1 mm
3. Evening
  6 PM–midnight
  Mostly clear, 27°−3°
  20% chance · 0.2 in0.4 cm
4. Overnight
  midnight–6 AM
  Clear, 23°−5°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow. Partly sunny, with a high near 43. Little or no snow accumulation expected.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
30°−1°–43°6°
Low, likely
18°−8°–33°1°
Wind
7 mph11 km/h, gusts 18 mph28 km/h
UV peak
3
Sunday, Nov 1. Snow. High 36°2°, low 19°−7°. Snow 0–3 in0–8 cm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Snow, 26°−3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 36°2°
  Dry
3. Evening
  6 PM–midnight
  Clear, 28°−2°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 25°−4°
  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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
32°0°–38°3°
Low, likely
16°−9°–22°−6°
Wind
7 mph12 km/h, gusts 27 mph44 km/h
UV peak
4
Monday, Nov 2. Mostly sunny. High 36°2°, low 21°−6°. Rain 0.06 in1.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 29°−2°
  20% chance
2. Afternoon
  noon–6 PM
  Sunny, 37°3°
  Dry
3. Evening
  6 PM–midnight
  Clear, 25°−4°
  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
30°−1°–44°7°
Low, likely
12°−11°–31°−1°
Wind
7 mph12 km/h, gusts 30 mph49 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 45°, low 23°.
Tomorrow
Dry, high 49°, low 24°, warming up.
Monday
Dry, high 49°, low 27°.
Rest of week
Highs 36–44°; chance of precipitation on Tuesday, Friday.

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

Gallatin River above Deer Creek near Big Sky

6.5 mi

Level: 4.9 ft

Reading from Sat 5:30 PM · NWS gauge page

Gallatin River near Gallatin Gateway

17 mi

Below flood stage

Level: 1.5 ft
Flow: 396 cfs

Reading from Sat 6 PM · NWS gauge page

Madison River near Cameron

21 mi

Level: 2.2 ft

Reading from Sat 5:15 PM · NWS gauge page

Madison River above Powerplant near McAllister

22 mi

Level: 3.1 ft
Flow: 2,980 cfs

Reading from Sat 5:45 PM · NWS gauge page

Sun & moon

Sun

Daylight: 10 h 31 min; Losing 3 min 3 s a day; shortest Dec 21, 1 h 47 min less
Golden hour: 5:43–6:43 PM; Morning 7:35–8:34 AM
Blue hour: 6:43–6:54 PM; Morning 7:23–7:35 AM; first light 7:23 AM

Stars tonight? Fair

Clear 7:25 PM–7:24 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 6:08 AM · rises 5:25 PM
Full moon: Oct 25
New moon: Nov 9

Looking northwest from Big Sky. The highest point on the skyline is about 11,100 ft, 6 mi away.Skyline from USGS elevation data, heights drawn up to 3× taller. Sky, sun and moon as they are now.