Cheyenne weather in August

In August, Cheyenne sees average daytime highs of 81°F and overnight lows near 56°F, with 1.5 in of rain across 8.2 wet days and about 13.6 hours of daylight. It is the 2nd-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 81°F through the month. The sky is clear or mostly clear about 42% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 12 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Cheyenne's 7th-clearest and 11th-windiest month. For the whole year in context, see Cheyenne's year-round climate.

Daytime high
81°
2nd warmest
Overnight low
56°
11th coldest
Rainfall
1.5 in
8.2 wet days
Daylight
13 h 42 min
5:14 AM – 6:53 PM
Cloud cover
48%
7th clearest
Wind
8 mph
11th windiest
Solar energy
6.47 kWh/m²
Travel score
6.9
out of 10

Cheyenne is capital city of the U.S. state of Wyoming and seat of Laramie County.

Density
1,021/km²
people per km²
Founded
1867

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 81°F through the month.

A typical August day in Cheyenne reaches about 81°F in the afternoon and slips back to 56°F overnight — a 25°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 89°F. Set against its neighbours, August runs about 2°F cooler than July and about 8°F warmer than September.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
18258
28257
38257
48257
58257
68257
78257
88257
98256
108156
118156
128156
138156
148156
158156
168156
178156
188156
198155
208155
218155
228155
238155
248155
258055
268055
278055
288054
298054
307954
317953

How August really feels in Cheyenne

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.

Cheyenne weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan38° / 21°0.53.93.89.40.0
Feb40° / 21°0.74.84.810.40.1
Mar49° / 27°1.46.65.111.72.1
Apr55° / 32°2.4105.413.13.4
May64° / 42°3.012.31.514.35.3
Jun76° / 51°2.110.2014.96.8
Jul83° / 57°1.69.3014.76.3
Aug81° / 56°1.58.2013.66.9
Sep73° / 47°1.560.412.37.5
Oct59° / 36°1.56.92.710.95.1
Nov47° / 27°0.84.74.49.71.7
Dec38° / 21°0.74.24.59.10.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 26% of August, with mostly cloudy or overcast conditions the remaining 32%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16436
26436
36436
46436
56436
66535
76535
86535
96535
106733
116733
126733
136832
146931
156931
166931
176931
186931
196931
207030
217030
227030
237030
247129
257129
267228
277228
287228
297228
307228
317228

Chance of precipitation in August

Any precipitation

Cheyenne gets around 1.5 in of rain over 8.2 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 26% and peaks near 31% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
131
231
331
431
530
630
730
830
930
1029
1129
1229
1328
1428
1527
1627
1727
1826
1926
2025
2125
2224
2324
2423
2523
2622
2722
2821
2921
3021
3120

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 95% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
188111
288111
388111
489101
589101
69190
79280
89280
99370
109370
119460
129460
139550
149550
159550
169640
179640
189730
199730
209730
219730
229820
239820
249820
259820
269820
279820
289820
299820
309820
319820

Wind in August

Winds average 8 mph in August.

Across August, daily wind ranges from about 8 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in August

DaylightNight

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

Days shrink by about 72 minutes over August. Sunrise moves from 4:58 AM to 5:29 AM, and sunset from 7:12 PM to 6:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.24:587:12
214.24:597:11
314.25:007:10
414.15:017:09
514.15:027:08
614.15:037:06
714.05:047:05
814.05:057:04
913.95:067:03
1013.95:077:01
1113.95:087:00
1213.85:096:59
1313.85:116:57
1413.75:126:56
1513.75:136:55
1613.75:146:53
1713.65:156:52
1813.65:166:50
1913.55:176:49
2013.55:186:47
2113.45:196:46
2213.45:206:44
2313.45:216:43
2413.35:226:41
2513.35:236:39
2613.25:246:38
2713.25:256:36
2813.15:266:35
2913.15:276:33
3013.15:286:31
3113.05:296:30

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.47 kWh/m².

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 7.28 kWh/m² in June across the year — August's 6.47 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.8Intense
46.7Intense
56.7Intense
66.7Intense
76.7Intense
86.7Intense
96.7Intense
106.6Intense
116.6Intense
126.6Intense
136.6Intense
146.6Intense
156.5Intense
166.5Intense
176.5Intense
186.5Intense
196.4Intense
206.4Intense
216.4Intense
226.3Intense
236.3Intense
246.3Intense
256.3Intense
266.2Intense
276.2Intense
286.1Intense
296.1Intense
306.1Intense
316.0Intense
Planning a trip in August

Is August a good time to visit Cheyenne?

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

6.9
Sightseeing
2nd-best month of the year
7.1
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Cheyenne for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Cheyenne in August

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

In August, Cheyenne sees daytime highs around 81°F and nights near 56°F. Pack light clothes and sun protection. Worth having: rain gear. About 8 days see rain.

light clothessun protectionrain gear

UV index in Cheyenne in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cheyenne peaks around July 13 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 13UV 11Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar7High
Apr6High
May8Very high
Jun10Extreme
Jul11Extreme
Aug9Very high
Sep7Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Cheyenne 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 Cheyenne is worst in September — around 15 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (November, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1415 µg/m³Nov 236 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar10Good
Apr9Good
May10Good
Jun10Good
Jul11Good
Aug14Moderate
Sep15Moderate
Oct13Moderate
Nov6Good
Dec6Good
Location & terrain

Where is Cheyenne?

Cheyenne sits at 41.1°N, 104.8°W, 6,089 ft above sea level, in United States. The nearest listed city is Fort Collins, 41 mi away.

Topography around Cheyenne

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

Within 2 miles, the terrain around Cheyenne has only modest variations in elevation — a maximum elevation change of 184 ft around an average of 6,099 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 984 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,801 ft.

The land around Cheyenne is covered by artificial surfaces (57%) and grassland (32%) within 2 miles, grassland (90%) within 10 miles, and grassland (83%) within 50 miles.

2 miles
184 ft
10 miles
984 ft
50 miles
5,801 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Fort Collins 41 mi · Laramie 42 mi · Windsor 46 mi · Greeley 50 mi · Loveland 53 mi · Evans 53 mi · Estes Park 64 mi · Longmont 69 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 Cheyenne (41.14°, -104.8203°, elevation 6,089 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).