Moses Lake weather in August

In August, Moses Lake sees average daytime highs of 88°F and overnight lows near 63°F, with 0.2 in of rain across 1.2 wet days and about 14 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 91°F in the first days to 84°F by the end. The sky is clear or mostly clear about 72% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 48 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is Moses Lake's 2nd-clearest and 8th-windiest month. For the whole year in context, see Moses Lake's year-round climate.

Daytime high
88°
2nd warmest
Overnight low
63°
11th coldest
Rainfall
0.2 in
1.2 wet days
Daylight
14 h 06 min
5:00 AM – 7:03 PM
Cloud cover
27%
2nd clearest
Wind
6 mph
8th windiest
Solar energy
6.71 kWh/m²
Travel score
5.6
out of 10

Moses Lake is city in Grant County, Washington, United States.

Density
455/km²
people per km²
Founded
1938

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 91°F in the first days to 84°F by the end.

A typical August day in Moses Lake reaches about 88°F in the afternoon and slips back to 63°F overnight — a 26°F spread between the day's warmth and the night's chill. On most days the high lands between 78°F and 98°F. Set against its neighbours, August runs about 1°F cooler than July and about 10°F warmer than September.

60°80°100°151015202531
Avg high (°F)Avg low (°F)
19165
29165
39165
49165
59165
69164
79164
89164
99064
109064
119064
129064
138964
148963
158963
168963
178863
188863
198862
208762
218762
228762
238661
248661
258661
268560
278560
288560
298460
308459
318459

How August really feels in Moses Lake

Once humidity and wind are folded in, August averages 12 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
12
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.

Moses Lake weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan37° / 26°1.48.54.18.70.0
Feb44° / 30°0.96.32100.9
Mar54° / 36°1.06.60.711.63.5
Apr64° / 44°0.75013.36.2
May74° / 52°0.74.6014.87.7
Jun81° / 58°0.53.6015.67.4
Jul90° / 64°0.21.4015.35.2
Aug88° / 63°0.21.20145.6
Sep78° / 55°0.31.9012.48.2
Oct62° / 44°0.95.5010.65.9
Nov46° / 34°1.38.41.69.11.4
Dec37° / 26°1.69.14.88.40.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 72% 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 16%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18911
28911
38812
48812
58812
68713
78713
88713
98614
108515
118515
128515
138515
148416
158416
168317
178317
188317
198317
208317
218218
228119
238119
248119
258119
268119
278119
288119
298119
308020
318020

Chance of precipitation in August

Any precipitation

Moses Lake gets around 0.2 in of rain over 1.2 wet days in August, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 4% and peaks near 5% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
24
34
44
54
64
74
84
93
103
113
123
134
144
154
164
174
184
194
204
214
225
235
245
255
265
275
285
295
305
315

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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1982
2982
3982
4982
5982
6982
7982
8982
9982
10982
11982
12973
13973
14973
15973
16973
17973
18973
19973
20982
21982
22982
23982
24982
25982
26982
27991
28991
29991
30991
31991

Wind in August

Winds average 6 mph in August.

Across August, daily wind ranges from about 6 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 48 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 96 minutes over August. Sunrise moves from 4:40 AM to 5:20 AM, and sunset from 7:26 PM to 6:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.84:407:26
214.74:417:25
314.74:437:24
414.64:447:22
514.64:457:21
614.54:467:19
714.54:487:18
814.54:497:16
914.44:507:15
1014.44:527:13
1114.34:537:11
1214.34:547:10
1314.24:567:08
1414.24:577:06
1514.14:587:05
1614.15:007:03
1714.05:017:01
1814.05:026:59
1913.95:046:58
2013.85:056:56
2113.85:066:54
2213.75:086:52
2313.75:096:50
2413.65:106:48
2513.65:126:46
2613.55:136:44
2713.55:146:42
2813.45:166:40
2913.45:176:39
3013.35:186:37
3113.25:206:35

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.71 kWh/m².

For context, solar energy here swings from a low near 1.23 kWh/m² to a high of 7.83 kWh/m² in July across the year — August's 6.71 kWh/m² falls in the middle.

02468151015202531
Solar energy (kWh/m²)Level
17.4Intense
27.4Intense
37.3Intense
47.3Intense
57.3Intense
67.2Intense
77.2Intense
87.1Intense
97.1Intense
107.0Intense
117.0Intense
126.9Intense
136.9Intense
146.8Intense
156.8Intense
166.7Intense
176.7Intense
186.6Intense
196.6Intense
206.5Intense
216.5Intense
226.4Intense
236.4Intense
246.3Intense
256.3Intense
266.2Intense
276.1Intense
286.1Intense
296.0Intense
306.0Bright
315.9Bright
Planning a trip in August

Is August a good time to visit Moses Lake?

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

5.6
Sightseeing
6th-best month of the year
8.4
Beach & pool
1st-best month of the year

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

What to pack for Moses Lake in August

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

In August, Moses Lake sees daytime highs around 88°F and nights near 63°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Moses Lake 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 Moses Lake peaks around July 17 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 17UV 8Dec 17UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5Moderate
May7Very high
Jun6High
Jul9Very high
Aug6High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Moses Lake 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 Moses Lake is worst in August — around 32 µg/m³ PM2.5 (moderate), about 4.4× the cleanest month (December, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1930 µg/m³Dec 197 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar11Good
Apr11Good
May9Good
Jun9Good
Jul13Moderate
Aug32Moderate
Sep22Moderate
Oct11Good
Nov10Good
Dec7Good
Location & terrain

Where is Moses Lake?

Moses Lake sits at 47.1°N, 119.3°W, 1,070 ft above sea level, in United States. The nearest listed city is Wenatchee, 52 mi away.

Topography around Moses Lake

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

Within 2 miles, the terrain around Moses Lake has only modest variations in elevation — a maximum elevation change of 174 ft around an average of 1,109 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 476 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,531 ft.

The land around Moses Lake is covered by artificial surfaces (35%) and grassland (30%) within 2 miles, cropland (43%) and grassland (38%) within 10 miles, and grassland (52%) and cropland (43%) within 50 miles.

2 miles
174 ft
10 miles
476 ft
50 miles
5,531 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Wenatchee 52 mi · Richland 58 mi · Ellensburg 60 mi · Tri-Cities 62 mi · Pasco 62 mi · Kennewick 64 mi · Sunnyside 66 mi · Yakima 68 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 Moses Lake (47.1301°, -119.2781°, elevation 1,070 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).