Bozeman weather in August: Bozeman, Montana: normal highs, lows, rain and records for August
Bozeman in August has a normal high of 84°F and a normal low of 47°F, a daily mean of 66°F, falling from 88°F on the 1st to 79°F by the 31st. Measurable precipitation falls on 8 days in a normal August, 0.94 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 9°C, 24 mm of precipitation in August.
- NOAA stationBozeman Gallatin Field
- Station IDUSW00024132
- Location45.79°N 111.16°W
- Elevation4,427 ft (1,349 m)
- Population57,894
- Jan 32° 10°
- Feb 36° 13°
- Mar 46° 22°
- Apr 55° 29°
- May 65° 38°
- Jun 74° 44°
- Jul 85° 49°
- Aug 84° 47°
- Sep 73° 40°
- Oct 58° 29°
- Nov 42° 18°
- Dec 32° 10°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Bozeman in August?
The normal high is 84°F and the normal low 47°F, for a daily mean of 65.8°F. August is 1.6°F cooler than July and 9.5°F warmer than September. August is the 2nd warmest month of the year in Bozeman and the 7th wettest. Across the month the normal high falls 9°F, from 88°F on August 1 to 79°F on August 31. From one year to the next August's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 63°F and 68°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 25%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 88°F | 51°F | 25% | 9% |
| August 8 | 87°F | 50°F | 25% | 9% |
| August 15 | 85°F | 48°F | 24% | 9% |
| August 22 | 82°F | 46°F | 24% | 9% |
| August 31 | 79°F | 44°F | 24% | 10% |
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 | 88°F | 51°F | 25% | 9% | 14 h 50 min |
| August 2 | 88°F | 50°F | 25% | 9% | 14 h 50 min |
| August 3 | 88°F | 50°F | 25% | 9% | 14 h 40 min |
| August 4 | 88°F | 50°F | 25% | 9% | 14 h 40 min |
| August 5 | 87°F | 50°F | 25% | 9% | 14 h 40 min |
| August 6 | 87°F | 50°F | 25% | 9% | 14 h 40 min |
| August 7 | 87°F | 50°F | 25% | 9% | 14 h 30 min |
| August 8 | 87°F | 50°F | 25% | 9% | 14 h 30 min |
| August 9 | 86°F | 49°F | 25% | 9% | 14 h 30 min |
| August 10 | 86°F | 49°F | 25% | 9% | 14 h 30 min |
| August 11 | 86°F | 49°F | 24% | 9% | 14 h 20 min |
| August 12 | 86°F | 49°F | 24% | 9% | 14 h 20 min |
| August 13 | 85°F | 48°F | 24% | 9% | 14 h 20 min |
| August 14 | 85°F | 48°F | 24% | 9% | 14 h 10 min |
| August 15 | 85°F | 48°F | 24% | 9% | 14 h 10 min |
| August 16 | 84°F | 48°F | 24% | 9% | 14 h 10 min |
| August 17 | 84°F | 47°F | 24% | 9% | 14 h 10 min |
| August 18 | 84°F | 47°F | 24% | 9% | 14 h |
| August 19 | 83°F | 47°F | 24% | 9% | 14 h |
| August 20 | 83°F | 47°F | 24% | 9% | 14 h |
| August 21 | 83°F | 46°F | 24% | 9% | 13 h 50 min |
| August 22 | 82°F | 46°F | 24% | 9% | 13 h 50 min |
| August 23 | 82°F | 46°F | 24% | 9% | 13 h 50 min |
| August 24 | 82°F | 45°F | 24% | 9% | 13 h 50 min |
| August 25 | 81°F | 45°F | 24% | 9% | 13 h 40 min |
| August 26 | 81°F | 45°F | 24% | 9% | 13 h 40 min |
| August 27 | 81°F | 45°F | 24% | 10% | 13 h 40 min |
| August 28 | 80°F | 44°F | 24% | 10% | 13 h 30 min |
| August 29 | 80°F | 44°F | 24% | 10% | 13 h 30 min |
| August 30 | 80°F | 44°F | 24% | 10% | 13 h 30 min |
| August 31 | 79°F | 44°F | 24% | 10% | 13 h 20 min |
- Normal high
- 84°FAugust average
- Normal low
- 47°FAugust average
- Precipitation
- 0.94 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 9
- Daylight
- 14 h 50 min to 13 h 20 minAugust 1 to August 31
- Days at 70°F or more
- 29
- Days at 80°F or more
- 24
- Sunshine
- 83%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024132; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Bozeman in August?
On a given August day the chance of 0.01 inch or more is 24% on average, highest around August 1 (25%). In all, 0.94 in falls on 8 days of a normal August.
In a normal August in Bozeman, 9 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024132.
How humid and windy is Bozeman in August?
At 3 p.m. the normal temperature is 78°F with 24% relative humidity and a dew point of 38°F; at 6 a.m. it is 47°F with 76% humidity. The wind averages 5.9 mph, most often from the west-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 47°F | 40°F | 76% | 4.7 mph | 77% |
| 9 a.m. | 62°F | 42°F | 49% | 3.1 mph | 76% |
| noon | 73°F | 41°F | 31% | 5.5 mph | 75% |
| 3 p.m. | 78°F | 38°F | 24% | 8.1 mph | 67% |
| 6 p.m. | 74°F | 39°F | 28% | 7.2 mph | 70% |
| 9 p.m. | 62°F | 41°F | 47% | 7.4 mph | 72% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024132. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for August in Bozeman?
The warmest August temperature on this station's record (since 1941) is 103°F, on August 5, 1961; the coldest is 27°F, on August 25, 1992. The wettest August brought 3.26 in (1964).
The August mean against the 1991-2020 normal of 65.8°F: 2021 65.3°F (−0.5), 2022 70.8°F (+5.0), 2023 67.6°F (+1.8), 2024 66.6°F (+0.8), 2025 66.8°F (+1.0), 2026 66.8°F (+1.0). 5 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 65.3°F | −0.5°F | 1.92 in |
| 2022 | 70.8°F | +5.0°F | 1.36 in |
| 2023 | 67.6°F | +1.8°F | 1.59 in |
| 2024 | 66.6°F | +0.8°F | 1.32 in |
| 2025 | 66.8°F | +1.0°F | 0.97 in |
| 2026 | 66.8°F | +1.0°F | 2.05 in |
Source: records: ACIS, station USW00024132; recent months: ACIS, station USW00024132. Records and recent months use complete months only.
How does August in Bozeman 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; Bozeman's is 84°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.