Big Sky weather in August: Big Sky, Montana: normal highs, lows, rain and records for August
Big Sky in August has a normal high of 77°F and a normal low of 39°F, a daily mean of 58°F, falling from 80°F on the 1st to 73°F by the 31st. Measurable precipitation falls on 11 days in a normal August, 1.56 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 4°C, 40 mm of precipitation in August.
- NOAA stationBig Sky (2 mi WNW)
- Station IDUSC00240775
- Location45.28°N 111.33°W
- Elevation6,590 ft (2,009 m)
- Population (census place)2,388
- Jan 30° 9°
- Feb 34° 9°
- Mar 42° 17°
- Apr 48° 23°
- May 58° 30°
- Jun 67° 36°
- Jul 78° 41°
- Aug 77° 39°
- Sep 68° 33°
- Oct 53° 25°
- Nov 37° 16°
- Dec 28° 9°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Big Sky in August?
The normal high is 77°F and the normal low 39°F, for a daily mean of 58.0°F. August is 1.5°F cooler than July and 7.2°F warmer than September. August is the 2nd warmest month of the year in Big Sky and the 10th wettest. Across the month the normal high falls 7°F, from 80°F on August 1 to 73°F on August 31. From one year to the next August's mean temperature typically moves about 2.1°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 56°F and 60°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 80°F | 42°F | 35% | 16% |
| August 8 | 79°F | 41°F | 35% | 17% |
| August 15 | 77°F | 39°F | 35% | 17% |
| August 22 | 76°F | 38°F | 35% | 18% |
| August 31 | 73°F | 36°F | 34% | 17% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 80°F | 42°F | 35% | 16% | 14 h 50 min |
| August 2 | 80°F | 42°F | 35% | 16% | 14 h 40 min |
| August 3 | 80°F | 42°F | 35% | 16% | 14 h 40 min |
| August 4 | 79°F | 42°F | 35% | 17% | 14 h 40 min |
| August 5 | 79°F | 41°F | 35% | 17% | 14 h 40 min |
| August 6 | 79°F | 41°F | 35% | 17% | 14 h 30 min |
| August 7 | 79°F | 41°F | 35% | 17% | 14 h 30 min |
| August 8 | 79°F | 41°F | 35% | 17% | 14 h 30 min |
| August 9 | 79°F | 41°F | 35% | 17% | 14 h 30 min |
| August 10 | 78°F | 40°F | 35% | 17% | 14 h 20 min |
| August 11 | 78°F | 40°F | 35% | 17% | 14 h 20 min |
| August 12 | 78°F | 40°F | 35% | 17% | 14 h 20 min |
| August 13 | 78°F | 40°F | 35% | 17% | 14 h 10 min |
| August 14 | 77°F | 40°F | 35% | 17% | 14 h 10 min |
| August 15 | 77°F | 39°F | 35% | 17% | 14 h 10 min |
| August 16 | 77°F | 39°F | 35% | 17% | 14 h 10 min |
| August 17 | 77°F | 39°F | 35% | 17% | 14 h |
| August 18 | 77°F | 39°F | 35% | 17% | 14 h |
| August 19 | 76°F | 39°F | 35% | 17% | 14 h |
| August 20 | 76°F | 38°F | 35% | 18% | 14 h |
| August 21 | 76°F | 38°F | 35% | 18% | 13 h 50 min |
| August 22 | 76°F | 38°F | 35% | 18% | 13 h 50 min |
| August 23 | 75°F | 38°F | 35% | 18% | 13 h 50 min |
| August 24 | 75°F | 38°F | 35% | 18% | 13 h 40 min |
| August 25 | 75°F | 37°F | 35% | 18% | 13 h 40 min |
| August 26 | 75°F | 37°F | 35% | 18% | 13 h 40 min |
| August 27 | 74°F | 37°F | 34% | 18% | 13 h 30 min |
| August 28 | 74°F | 37°F | 34% | 18% | 13 h 30 min |
| August 29 | 74°F | 37°F | 34% | 18% | 13 h 30 min |
| August 30 | 74°F | 37°F | 34% | 18% | 13 h 30 min |
| August 31 | 73°F | 36°F | 34% | 17% | 13 h 20 min |
- Normal high
- 77°FAugust average
- Normal low
- 39°FAugust average
- Precipitation
- 1.56 inmonth total
- Days with precipitation
- 110.01 inch or more
- Nights at 32°F or colder
- 3
- Daylight
- 14 h 50 min to 13 h 20 minAugust 1 to August 31
- Days at 70°F or more
- 28
- Days at 80°F or more
- 15
- Sunshine
- 83%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00240775; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Big Sky in August?
On a given August day the chance of 0.01 inch or more is 35% on average, highest around August 4 (35%). In all, 1.56 in falls on 11 days of a normal August.
In a normal August in Big Sky, 3 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00240775.
What are the records for August in Big Sky?
The warmest August temperature on this station's record (since 1967) is 93°F, on August 7, 1990; the coldest is 20°F, on August 26, 1992. The wettest August brought 4.07 in (1984).
Source: records: ACIS, station USC00240775. Records and recent months use complete months only.
How does August in Big Sky compare across Montana?
Across the 141 places PlainClimate covers in Montana, August normal highs run from 71°F in Cooke City to 90°F in Hardin; Big Sky's is 77°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.