Bozeman weather in August

In August, Bozeman sees average daytime highs of 77°F and overnight lows near 47°F, with 1.6 in of rain across 7.2 wet days and about 13.9 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 79°F in the first days to 74°F by the end. The sky is clear or mostly clear about 54% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 36 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is Bozeman's 2nd-clearest and 11th-windiest month. For the whole year in context, see Bozeman's year-round climate.

Daytime high
77°
2nd warmest
Overnight low
47°
11th coldest
Rainfall
1.6 in
7.2 wet days
Daylight
14 hours
5:30 AM – 7:27 PM
Cloud cover
40%
2nd clearest
Wind
4 mph
11th windiest
Solar energy
6.62 kWh/m²
Travel score
7.6
out of 10

Bozeman is city and the county seat of Gallatin County, Montana, United States.

Density
875/km²
people per km²
Founded
1864

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 79°F in the first days to 74°F by the end.

A typical August day in Bozeman reaches about 77°F in the afternoon and slips back to 47°F overnight — a 30°F spread between the day's warmth and the night's chill. On most days the high lands between 67°F and 86°F. Set against its neighbours, August runs on par with July and about 11°F warmer than September.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
18049
28049
38049
47949
57949
67949
77949
87949
97948
107948
117848
127848
137848
147848
157847
167847
177747
187747
197747
207747
217747
227646
237646
247646
257646
267546
277546
287545
297445
307445
317444

How August really feels in Bozeman

Once humidity and wind are folded in, August averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Bozeman weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan28° / 12°1.28.798.90.0
Feb31° / 13°1.38.69.310.10.0
Mar39° / 19°1.911.39.511.60.1
Apr47° / 26°3.214.19.513.31.4
May58° / 35°4.016.33.214.73.6
Jun67° / 42°4.214.40.715.45.6
Jul78° / 48°2.08.6015.17.3
Aug77° / 47°1.67.2013.97.6
Sep66° / 40°2.18.30.912.36.4
Oct51° / 29°2.310.64.810.72.6
Nov37° / 17°1.79.58.49.30.0
Dec28° / 10°1.38.798.60.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 25%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17921
27921
37822
47822
57723
67723
77723
87624
97624
107624
117624
127624
137624
147624
157624
167624
177624
187624
197525
207525
217525
227525
237426
247426
257426
267327
277327
287228
297228
307129
317030

Chance of precipitation in August

Any precipitation

Bozeman gets around 1.6 in of rain over 7.2 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 23% and peaks near 24% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
121
221
321
422
522
622
722
822
922
1022
1122
1222
1322
1423
1523
1623
1724
1824
1924
2024
2124
2224
2324
2424
2523
2623
2723
2823
2923
3024
3124

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1991
2991
3991
4991
5991
6991
7991
81000
91000
101000
111000
121000
131000
141000
151000
161000
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991
31991

Wind in August

Winds average 4 mph in August.

Across August, daily wind ranges from about 4 mph on the calmest days to 4 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 36 min at the start of August to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over August. Sunrise moves from 5:11 AM to 5:49 AM, and sunset from 7:49 PM to 7:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.65:117:49
214.65:137:48
314.55:147:46
414.55:157:45
514.55:167:44
614.45:177:42
714.45:197:41
814.35:207:39
914.35:217:38
1014.25:227:36
1114.25:237:35
1214.15:257:33
1314.15:267:32
1414.05:277:30
1514.05:287:28
1614.05:307:27
1713.95:317:25
1813.95:327:23
1913.85:337:22
2013.85:357:20
2113.75:367:18
2213.75:377:16
2313.65:397:15
2413.65:407:13
2513.55:417:11
2613.45:427:09
2713.45:447:07
2813.35:457:05
2913.35:467:04
3013.25:477:02
3113.25:497:00

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.62 kWh/m².

For context, solar energy here swings from a low near 1.67 kWh/m² to a high of 7.6 kWh/m² in July across the year — August's 6.62 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.2Intense
27.2Intense
37.1Intense
47.1Intense
57.1Intense
67.0Intense
77.0Intense
87.0Intense
96.9Intense
106.9Intense
116.8Intense
126.8Intense
136.8Intense
146.7Intense
156.7Intense
166.6Intense
176.6Intense
186.5Intense
196.5Intense
206.5Intense
216.4Intense
226.4Intense
236.3Intense
246.3Intense
256.2Intense
266.2Intense
276.1Intense
286.0Intense
296.0Bright
305.9Bright
315.9Bright
Planning a trip in August

Hazard calendar for Bozeman

In seasonPeak

None of Bozeman's seasonal hazards are active in August. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Bozeman's rainy season runs March–July, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Bozeman?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.6
Sightseeing
1st-best month of the year
6.9
Beach & pool
1st-best month of the year

August is one of the better times to visit Bozeman for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Bozeman in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Bozeman sees daytime highs around 77°F and nights near 47°F. Pack sun protection. Worth having: light clothes. About 7 days see rain.

sun protectionlight clothes

UV index in Bozeman in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bozeman peaks around July 12 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateVery highHighModerateLowJul 12UV 9Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5Moderate
May7Very high
Jun9Very high
Jul9Very high
Aug7Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Bozeman in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Bozeman is worst in August — around 19 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (January, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1618 µg/m³Jan 126 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar9Good
Apr10Good
May10Good
Jun9Good
Jul15Moderate
Aug19Moderate
Sep15Moderate
Oct7Good
Nov8Good
Dec6Good
Location & terrain

Where is Bozeman?

Bozeman sits at 45.7°N, 111.0°W, 4,816 ft above sea level, in United States. The nearest listed city is Butte, 75 mi away.

Topography around Bozeman

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Bozeman.

Within 2 miles, the terrain around Bozeman has only modest variations in elevation — a maximum elevation change of 627 ft around an average of 4,843 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 4,731 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,293 ft.

The land around Bozeman is covered by artificial surfaces (36%), grassland (32%) and trees (23%) within 2 miles, grassland (44%) and trees (34%) within 10 miles, and grassland (54%) and trees (36%) within 50 miles.

2 miles
627 ft
10 miles
4,731 ft
50 miles
7,293 ft
treesgrasslandcroplandartificial surfacesbare terrainmoss and lichen
August weather nearby: Butte 75 mi · Helena 79 mi · Billings 122 mi · Great Falls 126 mi · Rexburg 133 mi · Idaho Falls 160 mi · Missoula 163 mi · Conda 206 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Bozeman (45.6797°, -111.0386°, elevation 4,816 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).