Gillette weather in August

In August, Gillette sees average daytime highs of 84°F and overnight lows near 58°F, with 1.2 in of rain across 5.8 wet days and about 13.8 hours of daylight. It is the 2nd-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 85°F in the first days to 82°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 30 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Gillette's 1st-clearest and 11th-windiest month. For the whole year in context, see Gillette's year-round climate.

Daytime high
84°
2nd warmest
Overnight low
58°
11th coldest
Rainfall
1.2 in
5.8 wet days
Daylight
13 h 54 min
5:10 AM – 7:02 PM
Cloud cover
40%
1st clearest
Wind
10 mph
11th windiest
Solar energy
6.55 kWh/m²
Travel score
6.5
out of 10

Gillette is city in Campbell County, Wyoming, United States.

Density
664/km²
people per km²
Founded
1892

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 85°F in the first days to 82°F by the end.

A typical August day in Gillette reaches about 84°F in the afternoon and slips back to 58°F overnight — a 26°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 94°F. Set against its neighbours, August runs about 1°F cooler than July and about 11°F warmer than September.

40°60°80°100°151015202531
Avg high (°F)Avg low (°F)
18560
28560
38559
48559
58559
68559
78559
88559
98559
108458
118458
128458
138458
148458
158458
168458
178458
188457
198357
208357
218357
228357
238357
248357
258356
268256
278256
288256
298256
308155
318155

How August really feels in Gillette

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.

Gillette weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan34° / 16°0.65.25.59.10.0
Feb37° / 18°0.85.85.710.20.0
Mar47° / 26°1.47.85.811.61.5
Apr54° / 33°2.410.85.413.23.2
May64° / 42°3.111.51.214.55.4
Jun75° / 52°2.310.20.115.36.8
Jul85° / 59°1.47.90155.7
Aug84° / 58°1.25.8013.86.5
Sep72° / 48°1.460.512.37.4
Oct56° / 36°1.97.83.110.84.3
Nov44° / 25°0.854.89.40.9
Dec35° / 18°0.75.15.18.70.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 23% of August, with mostly cloudy or overcast conditions the remaining 24%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17624
27624
37624
47723
57723
67723
77723
87723
97624
107624
117723
127723
137723
147624
157624
167723
177723
187723
197624
207624
217624
227624
237624
247624
257624
267624
277723
287723
297624
307624
317525

Chance of precipitation in August

Any precipitation

Gillette gets around 1.2 in of rain over 5.8 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 19% and peaks near 23% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
123
223
323
422
522
622
722
822
922
1021
1121
1221
1320
1420
1520
1619
1719
1818
1918
2018
2117
2217
2316
2416
2515
2615
2715
2815
2915
3015
3115

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 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
184142
284142
385132
485132
585132
686122
788111
888111
989101
109091
119181
129271
139271
149460
159550
169550
179640
189640
199640
209640
219640
229640
239640
249640
259640
269640
279640
289730
299730
309730
319730

Wind in August

Winds average 10 mph in August.

Across August, daily wind ranges from about 10 mph on the calmest days to 11 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light breeze
810light breeze
910light breeze
1010light breeze
1110light breeze
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2911light breeze
3011light breeze
3111light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 30 min at the start of August to 13 h 06 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 4:53 AM to 5:28 AM, and sunset from 7:23 PM to 6:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.54:537:23
214.54:547:22
314.44:557:21
414.44:567:19
514.34:587:18
614.34:597:17
714.35:007:15
814.25:017:14
914.25:027:12
1014.15:037:11
1114.15:057:10
1214.05:067:08
1314.05:077:06
1413.95:087:05
1513.95:097:03
1613.95:107:02
1713.85:127:00
1813.85:136:59
1913.75:146:57
2013.75:156:55
2113.65:166:54
2213.65:186:52
2313.55:196:50
2413.55:206:48
2513.45:216:47
2613.45:226:45
2713.35:236:43
2813.35:256:41
2913.25:266:40
3013.25:276:38
3113.15:286:36

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.55 kWh/m².

For context, solar energy here swings from a low near 1.87 kWh/m² to a high of 7.4 kWh/m² in July across the year — August's 6.55 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.0Intense
27.0Intense
37.0Intense
46.9Intense
56.9Intense
66.9Intense
76.9Intense
86.8Intense
96.8Intense
106.8Intense
116.7Intense
126.7Intense
136.7Intense
146.6Intense
156.6Intense
166.6Intense
176.5Intense
186.5Intense
196.5Intense
206.4Intense
216.4Intense
226.3Intense
236.3Intense
246.3Intense
256.2Intense
266.2Intense
276.1Intense
286.1Intense
296.0Intense
306.0Bright
315.9Bright
Planning a trip in August

Is August a good time to visit Gillette?

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

6.5
Sightseeing
3rd-best month of the year
7.9
Beach & pool
1st-best month of the year

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

What to pack for Gillette in August

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

In August, Gillette sees daytime highs around 84°F and nights near 58°F. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Gillette 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 Gillette peaks around June 18 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 18UV 9Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May7High
Jun9Very high
Jul8Very high
Aug7High
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Gillette 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 Gillette is worst in August — around 20 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 2220 µg/m³Dec 188 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb9Good
Mar12Moderate
Apr12Good
May13Moderate
Jun13Moderate
Jul15Moderate
Aug20Moderate
Sep20Moderate
Oct14Moderate
Nov11Good
Dec8Good
Location & terrain

Where is Gillette?

Gillette sits at 44.3°N, 105.5°W, 4,554 ft above sea level, in United States. The nearest listed city is Sheridan, 80 mi away.

Topography around Gillette

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

Within 2 miles, the terrain around Gillette has only modest variations in elevation — a maximum elevation change of 348 ft around an average of 4,564 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,014 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,707 ft.

The land around Gillette is covered by grassland (50%) and artificial surfaces (35%) within 2 miles, grassland (91%) within 10 miles, and grassland (94%) within 50 miles.

2 miles
348 ft
10 miles
1,014 ft
50 miles
2,707 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Sheridan 80 mi · Casper 106 mi · Rapid City 114 mi · Billings 179 mi · Laramie 206 mi · Cheyenne 221 mi · Dickinson 222 mi · Fort Collins 257 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 Gillette (44.2911°, -105.5022°, elevation 4,554 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).