Kennewick weather in August

In August, Kennewick sees average daytime highs of 92°F and overnight lows near 62°F, with 0.2 in of rain across 1 wet days and about 14 hours of daylight. It is the 2nd-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 95°F in the first days to 88°F by the end. The sky is clear or mostly clear about 74% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 42 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is Kennewick's 2nd-clearest and 9th-windiest month. For the whole year in context, see Kennewick's year-round climate.

Daytime high
92°
2nd warmest
Overnight low
62°
11th coldest
Rainfall
0.2 in
1 wet days
Daylight
14 hours
5:01 AM – 7:00 PM
Cloud cover
24%
2nd clearest
Wind
5 mph
9th windiest
Solar energy
6.77 kWh/m²
Travel score
4.5
out of 10

Kennewick is city in Benton County, Washington, USA.

Density
1,057/km²
people per km²
Founded
1904

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 95°F in the first days to 88°F by the end.

A typical August day in Kennewick reaches about 92°F in the afternoon and slips back to 62°F overnight — a 30°F spread between the day's warmth and the night's chill. On most days the high lands between 81°F and 101°F. Set against its neighbours, August runs about 2°F cooler than July and about 10°F warmer than September.

60°80°100°151015202531
Avg high (°F)Avg low (°F)
19564
29564
39564
49464
59464
69464
79464
89464
99463
109363
119363
129363
139363
149262
159262
169262
179262
189162
199162
209161
219061
229061
239060
248960
258960
268960
278859
288859
298859
308759
318758

How August really feels in Kennewick

Once humidity and wind are folded in, August averages 23 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
23
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.

Kennewick weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan41° / 29°1.38.12.38.80.2
Feb48° / 32°0.96.21.3102.0
Mar58° / 38°0.95.90.411.64.6
Apr68° / 44°0.74.9013.36.9
May77° / 52°0.74.5014.77.6
Jun84° / 58°0.52.8015.56.6
Jul93° / 64°0.11015.23.9
Aug92° / 62°0.210144.5
Sep81° / 54°0.31.8012.37.7
Oct66° / 44°0.95010.76.7
Nov50° / 35°1.17.30.79.22.4
Dec41° / 29°1.48.42.48.50.1

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 74% 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 15%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
19010
29010
38911
48911
58812
68812
78812
88614
98614
108614
118614
128515
138515
148515
158515
168416
178416
188416
198317
208317
218416
228416
238416
248416
258317
268317
278416
288416
298416
308416
318416

Chance of precipitation in August

Any precipitation

Kennewick gets around 0.2 in of rain over 1 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 3% and peaks near 4% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
13
23
33
43
53
63
73
83
93
103
113
123
133
143
153
163
173
184
194
204
214
224
234
244
254
264
274
284
294
304
314

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 97% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1964
2955
3955
4955
5955
6955
7955
8955
9955
10955
11955
12964
13964
14964
15964
16964
17964
18973
19973
20973
21973
22982
23982
24982
25982
26982
27991
28991
29991
30991
31991

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 14 h 42 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 90 minutes over August. Sunrise moves from 4:42 AM to 5:20 AM, and sunset from 7:23 PM to 6:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.74:427:23
214.64:437:22
314.64:457:20
414.64:467:19
514.54:477:18
614.54:487:16
714.44:507:15
814.44:517:13
914.34:527:12
1014.34:537:10
1114.24:557:09
1214.24:567:07
1314.14:577:05
1414.14:587:04
1514.05:007:02
1614.05:017:00
1713.95:026:59
1813.95:046:57
1913.85:056:55
2013.85:066:53
2113.75:076:52
2213.75:096:50
2313.65:106:48
2413.65:116:46
2513.55:136:44
2613.55:146:42
2713.45:156:40
2813.45:176:39
2913.35:186:37
3013.35:196:35
3113.25:206:33

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.77 kWh/m².

For context, solar energy here swings from a low near 1.26 kWh/m² to a high of 7.85 kWh/m² in July across the year — August's 6.77 kWh/m² falls in the middle.

02468151015202531
Solar energy (kWh/m²)Level
17.4Intense
27.4Intense
37.4Intense
47.3Intense
57.3Intense
67.3Intense
77.2Intense
87.2Intense
97.1Intense
107.1Intense
117.0Intense
127.0Intense
136.9Intense
146.9Intense
156.8Intense
166.8Intense
176.7Intense
186.7Intense
196.6Intense
206.6Intense
216.5Intense
226.5Intense
236.4Intense
246.4Intense
256.3Intense
266.3Intense
276.2Intense
286.2Intense
296.1Intense
306.0Intense
316.0Bright
Planning a trip in August

Is August a good time to visit Kennewick?

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

4.5
Sightseeing
7th-best month of the year
7.9
Beach & pool
3rd-best month of the year

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

What to pack for Kennewick in August

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

In August, Kennewick sees daytime highs around 92°F and nights near 62°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Kennewick in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kennewick peaks around July 16 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighVery highHighModerateLowJul 16UV 8Dec 17UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5Moderate
May7Very high
Jun6High
Jul8Very high
Aug6High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Kennewick 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 Kennewick is worst in August — around 27 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodAug 2026 µg/m³Dec 189 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar14Moderate
Apr11Good
May9Good
Jun10Good
Jul13Moderate
Aug27Moderate
Sep21Moderate
Oct12Moderate
Nov11Good
Dec9Good
Location & terrain

Where is Kennewick?

Kennewick sits at 46.2°N, 119.1°W, 407 ft above sea level, in United States. The nearest listed city is Pasco, 2.5 mi away.

Topography around Kennewick

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

Within 2 miles, the terrain around Kennewick has only modest variations in elevation — a maximum elevation change of 282 ft around an average of 413 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,886 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,829 ft.

The land around Kennewick is covered by artificial surfaces (49%) and trees (21%) within 2 miles, grassland (39%) and cropland (28%) within 10 miles, and grassland (50%) and cropland (42%) within 50 miles.

2 miles
282 ft
10 miles
1,886 ft
50 miles
3,829 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Pasco 2.5 mi · Tri-Cities 3.7 mi · Richland 8.7 mi · Hermiston 27 mi · Walla Walla 39 mi · Pendleton 41 mi · Sunnyside 42 mi · Moses Lake 64 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 Kennewick (46.2112°, -119.1372°, elevation 407 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).