Spokane Valley weather in August

In August, Spokane Valley sees average daytime highs of 83°F and overnight lows near 57°F, with 0.5 in of rain across 2.6 wet days and about 14.1 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 86°F in the first days to 79°F by the end. The sky is clear or mostly clear about 64% 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 18 min by month's end. Set against the rest of the year, August is Spokane Valley's 2nd-clearest and 9th-windiest month. For the whole year in context, see Spokane Valley's year-round climate.

Daytime high
83°
2nd warmest
Overnight low
57°
11th coldest
Rainfall
0.5 in
2.6 wet days
Daylight
14 h 06 min
4:50 AM – 6:56 PM
Cloud cover
31%
2nd clearest
Wind
5 mph
9th windiest
Solar energy
6.48 kWh/m²
Travel score
7.2
out of 10

Spokane Valley is city in Washington, United States of America.

Density
963/km²
people per km²
Founded
2003

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 86°F in the first days to 79°F by the end.

A typical August day in Spokane Valley reaches about 83°F in the afternoon and slips back to 57°F overnight — a 27°F spread between the day's warmth and the night's chill. On most days the high lands between 72°F and 93°F. Set against its neighbours, August runs on par with July and about 10°F warmer than September.

40°60°80°100°151015202531
Avg high (°F)Avg low (°F)
18659
28659
38659
48658
58658
68658
78658
88558
98558
108558
118558
128558
138458
148457
158457
168457
178357
188357
198356
208256
218256
228256
238255
248155
258155
268055
278054
288054
298054
307953
317953

How August really feels in Spokane Valley

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.

Spokane Valley 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
Jan35° / 25°3.113.38.98.70.0
Feb40° / 26°2.110.66.39.90.0
Mar48° / 31°2.712.84.111.61.6
Apr57° / 37°2.3111.213.33.8
May66° / 45°2.08.6014.96.3
Jun73° / 51°1.56.6015.77.2
Jul84° / 57°0.63015.47.0
Aug83° / 57°0.52.6014.17.2
Sep73° / 49°0.94.40.112.47.8
Oct58° / 39°2.08.50.310.64.5
Nov43° / 31°3.313.259.10.6
Dec35° / 25°3.412.898.30.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 64% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 17% of August, with mostly cloudy or overcast conditions the remaining 19%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18614
28614
38614
48515
58416
68416
78416
88416
98317
108317
118317
128317
138218
148119
158119
168119
178020
188020
197921
207921
217921
227921
237921
247921
257723
267723
277723
287723
297723
307624
317624

Chance of precipitation in August

Any precipitation

Spokane Valley gets around 0.5 in of rain over 2.6 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 9% and peaks near 9% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
18
28
38
48
58
68
78
88
98
108
118
128
138
148
158
169
179
189
199
209
219
229
239
249
259
269
279
289
299
309
319

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 (%)
1955
2955
3955
4955
5955
6955
7964
8964
9964
10964
11964
12964
13973
14973
15973
16973
17973
18973
19973
20982
21982
22982
23982
24982
25982
26982
27982
28982
29982
30982
31982

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 48 min at the start of August to 13 h 18 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 4:30 AM to 5:11 AM, and sunset from 7:20 PM to 6:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.84:307:20
214.84:327:18
314.74:337:17
414.74:347:16
514.64:357:14
614.64:377:13
714.54:387:11
814.54:397:09
914.54:417:08
1014.44:427:06
1114.44:437:05
1214.34:457:03
1314.34:467:01
1414.24:476:59
1514.14:496:58
1614.14:506:56
1714.04:526:54
1814.04:536:52
1913.94:546:50
2013.94:566:49
2113.84:576:47
2213.84:586:45
2313.75:006:43
2413.75:016:41
2513.65:036:39
2613.65:046:37
2713.55:056:35
2813.45:076:33
2913.45:086:31
3013.35:106:29
3113.35:116:27

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.48 kWh/m².

For context, solar energy here swings from a low near 1.06 kWh/m² to a high of 7.56 kWh/m² in July across the year — August's 6.48 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.2Intense
27.2Intense
37.1Intense
47.1Intense
57.0Intense
67.0Intense
77.0Intense
86.9Intense
96.8Intense
106.8Intense
116.8Intense
126.7Intense
136.7Intense
146.6Intense
156.6Intense
166.5Intense
176.5Intense
186.4Intense
196.3Intense
206.3Intense
216.2Intense
226.2Intense
236.1Intense
246.1Intense
256.0Intense
266.0Bright
275.9Bright
285.8Bright
295.8Bright
305.7Bright
315.7Bright
Planning a trip in August

Is August a good time to visit Spokane Valley?

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

7.2
Sightseeing
2nd-best month of the year
8.4
Beach & pool
1st-best month of the year

August is one of the better times to visit Spokane Valley for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Spokane Valley in August

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

In August, Spokane Valley sees daytime highs around 83°F and nights near 57°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Spokane Valley 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 Spokane Valley 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
May7High
Jun6High
Jul9Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Spokane Valley 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 Spokane Valley is worst in August — around 30 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (December, 6 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1828 µg/m³Dec 216 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar10Good
Apr11Good
May11Good
Jun10Good
Jul13Moderate
Aug30Moderate
Sep20Moderate
Oct11Good
Nov11Good
Dec6Good
Location & terrain

Where is Spokane Valley?

Spokane Valley sits at 47.7°N, 117.2°W, 2,018 ft above sea level, in United States. The nearest listed city is Opportunity, 1.9 mi away.

Topography around Spokane Valley

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

Within 2 miles, the terrain around Spokane Valley has only modest variations in elevation — a maximum elevation change of 456 ft around an average of 2,008 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,497 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,026 ft.

The land around Spokane Valley is covered by artificial surfaces (47%), trees (24%) and grassland (24%) within 2 miles, trees (43%) and grassland (28%) within 10 miles, and trees (52%), grassland (22%) and cropland (22%) within 50 miles.

2 miles
456 ft
10 miles
3,497 ft
50 miles
5,026 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Opportunity 1.9 mi · Spokane 8.7 mi · Post Falls 14 mi · Coeur d'Alene 21 mi · Pullman 65 mi · Moscow 66 mi · Lewiston 88 mi · Lewiston Orchards 90 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 Spokane Valley (47.6732°, -117.2394°, elevation 2,018 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).