Weather StoryAlmanac, microseasons, and the day's weather story.

Big Sky, Montana Weather

Monsoon storms drench the south. Day 14 of summer. Read this microseason across nine climate regions →

Big Sky weather forecast — hour by hour, 7-day outlook, NOAA radar

Big Sky, MT
Saturday, July 4 at 12:44 AM
53
°
Clear
Feels like
48°
Humidity
46%
Wind
4 mph
Sunrise
11:43 PM
Sunset
3:16 PM
Big Sky, MT
Hour by hour · 24h
24-Hour ForecastBig Sky, MT: 24-hour forecast. Temperatures range from 49 to 79 degrees Fahrenheit.
L 49°H 79°
Big Sky, MT
7-day forecast
  1. Today
    Jul 4
    Overcast
    79°49°
  2. Sunday
    Jul 5
    Drizzle
    32%
    0.16″
    80°54°+1°
  3. Monday
    Jul 6
    Drizzle
    41%
    82°52°+2°
  4. Tuesday
    Jul 7
    Drizzle
    37%
    0.02″
    75°50°-7°
  5. Wednesday
    Jul 8
    Overcast
    21%
    80°54°+5°
  6. Thursday
    Jul 9
    Clear
    21%
    77°51°-3°
  7. Friday
    Jul 10
    Partly Cloudy
    79°48°+2°
Big Sky, MT
Anemometer · 24h winds · from true
NESW
From · True
WNW
295° · backing 112°
Direction
WNW
295°
Sustained
4
mph
Gust
4
mph
Peak 24h
20
avg 6
Beaufort · 2 · LIGHT BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 6 · pk 20 @ 6:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 215SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Big Sky, MT
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
791.9
-1.8 mb in 3h · falling · 23.38 inHg
Now
791.9
mb
3h
-1.8
mb
12h
-5.7
mb
24h
+3.5
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 785797
780785790795800805-21h-18h-15h-12h-9h-6h-3h-24hNOW797.4785.1791.7
−24h−18h−12h−6hnow
Deep low still deepening — rough seas, strong wind, persistent rain.
Big Sky, MT
Air quality
40
AQI
Good
-7 in 6h

AQI 40 (Good), driven by Ozone. AQI down 7 over the last 6 hours (gradual decline).

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5Good
2.4μg/m³
PM 10Good
3μg/m³
NO₂Good
7μg/m³
OzoneDRIVERModerate
62μg/m³
UV IndexLow
0.0
Big Sky, MT
Sky cover · visibility · 24h
Cloud cover
0%
CLEAR
100%0%−24h−18h−12h−6hnow

Visibility
85.0mi
UNLIMITED
157 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
06:44 UTC · Big Sky, MT · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
06:44 UTC · Big Sky, MT · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Big Sky, MT
Satellite · infrared · animated
Big Sky, MT
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Big Sky, MT
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:06 AM
Sunrise
11:43 PM
Daylight
15h 33m
Sunset
3:16 PM
Civil dusk
9:54 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Big Sky, MT
The moon
Waning Gibbous
83% illuminated
Moonrise
11:30 PM
Moonset
10:29 AM
In sign
♓︎ Pisces
Big Sky, MT
Microseason
Jul 1–5

Monsoon storms drench the south

weather
Jan 150% of the yearDec 31

Read this microseason across nine climate regions →

Big Sky at a glance

  • Today vs. normal: 13°F below the seasonal normal for this latitude
  • Last frost: May 18 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 59716

15-Day Forecast — Big Sky

  1. Sat79°50°2%
  2. Sun80°54°32%
  3. Mon82°52°41%
  4. Tue75°50°37%
  5. Wed80°54°21%
  6. Thu77°51°21%
  7. Fri79°48°9%
  8. Sat84°52°3%
  9. Sun79°53°4%
  10. Mon81°49°11%
  11. Tue89°55°18%
  12. Wed88°60°24%
  13. Thu85°57°26%
  14. Fri85°56°36%
  15. Sat85°58°39%

Forecast data from Open-Meteo (CC BY 4.0).

Right now in the garden

Peak growing season

As of July 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.

SPC Convective Outlook

Storm Prediction Center — Big Sky

SPC includes Big Sky in the general thunderstorm area tomorrow — no severe risk, but storms are possible.

  • TODAYNONENo severe risk
  • TOMORROWTSTMGeneral Thunderstorms
  • DAY 3TSTMGeneral Thunderstorms

Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.

Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.

ZIP codes in Big Sky

  • 59730
  • 59716

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.