Washington weather in August

In August, Washington sees average daytime highs of 92°F and overnight lows near 68°F, with 0.3 in of rain across 1.7 wet days and about 13.4 hours of daylight. It is the 2nd-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 93°F in the first days to 90°F by the end. The sky is clear or mostly clear about 75% of the time in August, and the air most often feels dry.

Daylight stretches from about 13 h 54 min at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Washington's 3rd-clearest and 11th-windiest month. For the whole year in context, see Washington's year-round climate.

Daytime high
92°
2nd warmest
Overnight low
68°
11th coldest
Rainfall
0.3 in
1.7 wet days
Daylight
13 h 24 min
5:55 AM – 7:21 PM
Cloud cover
27%
3rd clearest
Wind
5 mph
11th windiest
Solar energy
7.03 kWh/m²
Travel score
4.3
out of 10

Washington is city in Washingon County, Utah, United States.

Density
285/km²
people per km²
Founded
1857

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 93°F in the first days to 90°F by the end.

A typical August day in Washington reaches about 92°F in the afternoon and slips back to 68°F overnight — a 23°F spread between the day's warmth and the night's chill. On most days the high lands between 85°F and 98°F. Set against its neighbours, August runs about 2°F cooler than July and about 8°F warmer than September.

60°70°80°90°100°151015202531
Avg high (°F)Avg low (°F)
19370
29370
39370
49370
59370
69370
79370
89369
99369
109369
119369
129269
139269
149269
159269
169269
179269
189268
199268
209268
219168
229168
239168
249167
259167
269167
279067
289066
299066
309066
318965

How August really feels in Washington

Once humidity and wind are folded in, August averages 30 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
30
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Washington weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan48° / 28°1.65.42.89.72.1
Feb52° / 31°1.86.33.110.63.2
Mar60° / 38°1.45.81.811.75.6
Apr68° / 44°0.73.70.712.97.5
May78° / 53°0.42.20148.3
Jun89° / 62°0.10.7014.55.6
Jul94° / 70°0.21.2014.33.7
Aug92° / 68°0.31.7013.44.3
Sep84° / 59°0.41.9012.37.2
Oct71° / 46°0.72.90.1118.3
Nov57° / 35°0.93.30.9105.1
Dec47° / 28°1.34.92.79.51.8

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 75% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 12% of August, with mostly cloudy or overcast conditions the remaining 13%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18119
28119
38317
48317
58317
68416
78515
88515
98614
108713
118812
128812
138812
148812
158911
168911
178911
188911
198911
208911
218911
228911
238911
248812
258713
268713
278713
288713
298713
308713
318713

Chance of precipitation in August

Any precipitation

Washington gets around 0.3 in of rain over 1.7 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 6% and peaks near 8% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
205
215
225
236
246
256
267
277
287
298
308
318

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 (%)
19271
29271
39271
49361
59361
69361
79451
89451
99541
109541
119541
129541
139541
149541
159541
169541
179541
189541
199541
209541
219541
229541
239541
249541
259541
269541
279541
289541
299541
309541
319541

Wind in August

Winds average 5 mph in August.

Across August, daily wind ranges from about 5 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 54 min at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over August. Sunrise moves from 5:42 AM to 6:08 AM, and sunset from 7:38 PM to 7:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.95:427:38
213.95:437:37
313.95:447:36
413.85:457:35
513.85:467:34
613.85:477:33
713.75:477:32
813.75:487:31
913.75:497:30
1013.65:507:28
1113.65:517:27
1213.65:527:26
1313.55:527:25
1413.55:537:24
1513.55:547:22
1613.45:557:21
1713.45:567:20
1813.45:577:19
1913.35:587:17
2013.35:587:16
2113.35:597:15
2213.26:007:13
2313.26:017:12
2413.16:027:10
2513.16:037:09
2613.16:047:08
2713.06:047:06
2813.06:057:05
2913.06:067:03
3012.96:077:02
3112.96:087:00

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 7.03 kWh/m².

For context, solar energy here swings from a low near 2.73 kWh/m² to a high of 8.49 kWh/m² in June across the year — August's 7.03 kWh/m² falls in the middle.

02468151015202531
Solar energy (kWh/m²)Level
17.3Intense
27.3Intense
37.3Intense
47.3Intense
57.3Intense
67.3Intense
77.3Intense
87.2Intense
97.2Intense
107.2Intense
117.2Intense
127.2Intense
137.2Intense
147.1Intense
157.1Intense
167.1Intense
177.0Intense
187.0Intense
197.0Intense
206.9Intense
216.9Intense
226.9Intense
236.8Intense
246.8Intense
256.8Intense
266.7Intense
276.7Intense
286.7Intense
296.6Intense
306.6Intense
316.5Intense
Planning a trip in August

Is August a good time to visit Washington?

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

4.3
Sightseeing
8th-best month of the year
7.8
Beach & pool
3rd-best month of the year

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

What to pack for Washington in August

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

In August, Washington sees daytime highs around 92°F and nights near 68°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Washington in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Washington peaks around July 15 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 15UV 11Dec 18UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr6High
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate
Location & terrain

Where is Washington?

Washington sits at 37.1°N, 113.5°W, 2,792 ft above sea level, in United States. The nearest listed city is Saint George, 4.3 mi away.

Topography around Washington

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

Within 2 miles, the terrain around Washington has only modest variations in elevation — a maximum elevation change of 787 ft around an average of 2,854 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 4,137 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,291 ft.

The land around Washington is covered by artificial surfaces (40%), shrubs (23%) and bare terrain (21%) within 2 miles, grassland (31%), bare terrain (27%) and shrubs (25%) within 10 miles, and shrubs (34%), grassland (28%) and trees (24%) within 50 miles.

2 miles
787 ft
10 miles
4,137 ft
50 miles
9,291 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Saint George 4.3 mi · Hurricane 12 mi · Mesquite 38 mi · Cedar City 45 mi · Grand Canyon 106 mi · Sunrise Manor 107 mi · Boulder City 108 mi · North Las Vegas 110 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 Washington (37.1305°, -113.5083°, elevation 2,792 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).