Tualatin weather in August

In August, Tualatin sees average daytime highs of 81°F and overnight lows near 56°F, with 0.6 in of rain across 2.6 wet days and about 13.9 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 83°F in the first days to 79°F by the end. The sky is clear or mostly clear about 60% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 36 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is Tualatin's 1st-clearest and 10th-windiest month. For the whole year in context, see Tualatin's year-round climate.

Daytime high
81°
1st warmest
Overnight low
56°
12th coldest
Rainfall
0.6 in
2.6 wet days
Daylight
13 h 54 min
5:17 AM – 7:13 PM
Cloud cover
35%
1st clearest
Wind
4 mph
10th windiest
Solar energy
6 kWh/m²
Travel score
7.9
out of 10

Tualatin is city in Washington and Clackamas counties, Oregon, United States.

Density
1,275/km²
people per km²
Founded
1913

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 83°F in the first days to 79°F by the end.

A typical August day in Tualatin reaches about 81°F in the afternoon and slips back to 56°F overnight — a 25°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 92°F. Set against its neighbours, August runs on par with July and about 6°F warmer than September.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
18357
28357
38357
48257
58257
68257
78257
88257
98257
108257
118257
128257
138257
148257
158257
168157
178156
188156
198156
208156
218156
228056
238056
248056
258056
268056
277955
287955
297955
307955
317955

How August really feels in Tualatin

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.

Tualatin weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan47° / 36°6.617.31.88.91.2
Feb50° / 37°5.014.81.510.12.0
Mar55° / 39°5.717.50.711.62.8
Apr60° / 42°4.516.1013.24.0
May67° / 48°2.811.1014.75.9
Jun72° / 52°1.77.6015.47.0
Jul80° / 56°0.52.3015.18.0
Aug81° / 56°0.62.6013.97.9
Sep75° / 52°1.66.2012.37.7
Oct63° / 46°4.211.9010.75.2
Nov52° / 40°6.917.30.49.32.2
Dec46° / 36°7.6182.28.60.9

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 60% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of August, with mostly cloudy or overcast conditions the remaining 26%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18020
27921
37921
47723
57723
67723
77624
87525
97525
107525
117426
127426
137327
147327
157327
167327
177327
187327
197327
207327
217228
227228
237228
247228
257228
267228
277228
287129
297129
307129
317129

Chance of precipitation in August

Any precipitation

Tualatin gets around 0.6 in of rain over 2.6 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 9% and peaks near 13% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
15
25
35
45
56
66
76
86
96
107
117
127
138
148
158
168
179
189
199
2010
2110
2210
2311
2411
2511
2611
2712
2812
2912
3013
3113

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 75% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
175241
275241
375241
475241
574251
674251
773261
873261
972271
1072271
1171281
1271272
1371272
1471272
1572262
1672262
1773252
1873252
1974242
2074242
2175232
2275232
2375232
2477221
2577221
2678211
2778211
2878211
2979201
3079201
3180200

Wind in August

Winds average 4 mph in August.

Across August, daily wind ranges from about 4 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
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 36 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 84 minutes over August. Sunrise moves from 4:59 AM to 5:36 AM, and sunset from 7:35 PM to 6:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.64:597:35
214.65:007:34
314.55:017:33
414.55:037:31
514.45:047:30
614.45:057:28
714.35:067:27
814.35:077:26
914.35:097:24
1014.25:107:23
1114.25:117:21
1214.15:127:20
1314.15:147:18
1414.05:157:16
1514.05:167:15
1613.95:177:13
1713.95:187:11
1813.85:207:10
1913.85:217:08
2013.75:227:06
2113.75:237:05
2213.65:257:03
2313.65:267:01
2413.55:276:59
2513.55:286:57
2613.45:306:56
2713.45:316:54
2813.35:326:52
2913.35:336:50
3013.25:356:48
3113.25:366:46

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6 kWh/m².

For context, solar energy here swings from a low near 1.02 kWh/m² to a high of 6.83 kWh/m² in July across the year — August's 6 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.6Intense
56.6Intense
66.5Intense
76.5Intense
86.4Intense
96.4Intense
106.3Intense
116.3Intense
126.2Intense
136.2Intense
146.2Intense
156.1Intense
166.0Intense
176.0Intense
186.0Bright
195.9Bright
205.8Bright
215.8Bright
225.7Bright
235.7Bright
245.6Bright
255.6Bright
265.5Bright
275.5Bright
285.4Bright
295.4Bright
305.3Bright
315.3Bright
Planning a trip in August

Hazard calendar for Tualatin

In seasonPeak

None of Tualatin's seasonal hazards are active in August. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Tualatin's rainy season runs October–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Tualatin?

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

7.9
Sightseeing
2nd-best month of the year
8.2
Beach & pool
1st-best month of the year

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

What to pack for Tualatin in August

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

In August, Tualatin sees daytime highs around 81°F and nights near 56°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Tualatin 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 Tualatin 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateVery highVery highHighModerateLowJul 17UV 8Dec 17UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5Moderate
May8Very high
Jun7High
Jul8Very high
Aug7High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Tualatin 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 Tualatin is worst in September — around 22 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (January, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1621 µg/m³Jan 117 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb9Good
Mar11Good
Apr11Good
May10Good
Jun9Good
Jul8Good
Aug13Moderate
Sep22Moderate
Oct14Moderate
Nov9Good
Dec7Good
Location & terrain

Where is Tualatin?

Tualatin sits at 45.4°N, 122.8°W, 125 ft above sea level, in United States. The nearest listed city is Tigard, 3.1 mi away.

Topography around Tualatin

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

Within 2 miles, the terrain around Tualatin has only modest variations in elevation — a maximum elevation change of 289 ft around an average of 194 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,306 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,690 ft.

The land around Tualatin is covered by trees (56%) and artificial surfaces (35%) within 2 miles, trees (61%) within 10 miles, and trees (76%) within 50 miles.

2 miles
289 ft
10 miles
1,306 ft
50 miles
6,690 ft
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Tigard 3.1 mi · Sherwood 4.3 mi · Lake Oswego 5.0 mi · Wilsonville 5.6 mi · Oak Grove 6.2 mi · Beaverton 7.5 mi · Milwaukie 7.5 mi · West Linn 7.5 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 Tualatin (45.384°, -122.764°, elevation 125 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).