Walla Walla weather in August: Walla Walla, Washington: normal highs, lows, rain and records for August
Walla Walla in August has a normal high of 89°F and a normal low of 62°F, a daily mean of 75°F, falling from 92°F on the 1st to 84°F by the 31st. Measurable precipitation falls on 3 days in a normal August, 0.40 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 17°C, 10 mm of precipitation in August.
- NOAA stationWalla Walla Regional Airport
- Station IDUSW00024160
- Location46.09°N 118.29°W
- Elevation1,166 ft (355 m)
- Population33,901
- Jan 42° 31°
- Feb 47° 33°
- Mar 56° 38°
- Apr 63° 43°
- May 71° 49°
- Jun 79° 55°
- Jul 90° 62°
- Aug 89° 62°
- Sep 79° 54°
- Oct 63° 44°
- Nov 49° 36°
- Dec 41° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Walla Walla in August?
The normal high is 89°F and the normal low 62°F, for a daily mean of 75.2°F. August is 1.1°F cooler than July and 9.0°F warmer than September. August is the 2nd warmest month of the year in Walla Walla and the 12th wettest. Across the month the normal high falls 8°F, from 92°F on August 1 to 84°F on August 31. From one year to the next August's mean temperature typically moves about 1.8°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 73°F and 77°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 9%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 92°F | 64°F | 8% | 2% |
| August 8 | 91°F | 64°F | 8% | 3% |
| August 15 | 89°F | 62°F | 8% | 3% |
| August 22 | 87°F | 60°F | 8% | 3% |
| August 31 | 84°F | 58°F | 9% | 4% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 92°F | 64°F | 8% | 2% | 14 h 50 min |
| August 2 | 92°F | 64°F | 8% | 2% | 14 h 50 min |
| August 3 | 92°F | 64°F | 8% | 2% | 14 h 50 min |
| August 4 | 92°F | 64°F | 8% | 2% | 14 h 40 min |
| August 5 | 92°F | 64°F | 8% | 3% | 14 h 40 min |
| August 6 | 91°F | 64°F | 8% | 3% | 14 h 40 min |
| August 7 | 91°F | 64°F | 8% | 3% | 14 h 40 min |
| August 8 | 91°F | 64°F | 8% | 3% | 14 h 30 min |
| August 9 | 91°F | 64°F | 8% | 3% | 14 h 30 min |
| August 10 | 91°F | 63°F | 8% | 3% | 14 h 30 min |
| August 11 | 90°F | 63°F | 8% | 3% | 14 h 20 min |
| August 12 | 90°F | 63°F | 8% | 3% | 14 h 20 min |
| August 13 | 90°F | 63°F | 8% | 3% | 14 h 20 min |
| August 14 | 89°F | 62°F | 8% | 3% | 14 h 20 min |
| August 15 | 89°F | 62°F | 8% | 3% | 14 h 10 min |
| August 16 | 89°F | 62°F | 8% | 3% | 14 h 10 min |
| August 17 | 89°F | 62°F | 8% | 3% | 14 h 10 min |
| August 18 | 88°F | 61°F | 8% | 3% | 14 h |
| August 19 | 88°F | 61°F | 8% | 3% | 14 h |
| August 20 | 88°F | 61°F | 8% | 3% | 14 h |
| August 21 | 87°F | 61°F | 8% | 3% | 14 h |
| August 22 | 87°F | 60°F | 8% | 3% | 13 h 50 min |
| August 23 | 87°F | 60°F | 8% | 3% | 13 h 50 min |
| August 24 | 86°F | 60°F | 8% | 3% | 13 h 50 min |
| August 25 | 86°F | 60°F | 9% | 3% | 13 h 40 min |
| August 26 | 86°F | 59°F | 9% | 3% | 13 h 40 min |
| August 27 | 85°F | 59°F | 9% | 3% | 13 h 40 min |
| August 28 | 85°F | 59°F | 9% | 3% | 13 h 30 min |
| August 29 | 85°F | 59°F | 9% | 4% | 13 h 30 min |
| August 30 | 85°F | 58°F | 9% | 4% | 13 h 30 min |
| August 31 | 84°F | 58°F | 9% | 4% | 13 h 30 min |
- Normal high
- 89°FAugust average
- Normal low
- 62°FAugust average
- Precipitation
- 0.40 inmonth total
- Days with precipitation
- 30.01 inch or more
- Days at 90°F or more
- 16
- Daylight
- 14 h 50 min to 13 h 30 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 27
- Sunshine
- 92%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024160; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Walla Walla in August?
On a given August day the chance of 0.01 inch or more is 8% on average, highest around August 31 (9%). In all, 0.40 in falls on 3 days of a normal August.
In a normal August in Walla Walla, 16 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024160.
How humid and windy is Walla Walla in August?
At 3 p.m. the normal temperature is 83°F with 24% relative humidity and a dew point of 43°F; at 6 a.m. it is 61°F with 54% humidity. The wind averages 7.9 mph, most often from the west-southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 61°F | 44°F | 54% | 7.0 mph | 80% |
| 9 a.m. | 71°F | 45°F | 40% | 8.6 mph | 81% |
| noon | 79°F | 44°F | 30% | 8.1 mph | 81% |
| 3 p.m. | 83°F | 43°F | 24% | 8.0 mph | 80% |
| 6 p.m. | 79°F | 43°F | 28% | 7.4 mph | 82% |
| 9 p.m. | 69°F | 44°F | 41% | 8.3 mph | 85% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024160. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for August in Walla Walla?
The warmest August temperature on this station's record (since 1949) is 114°F, on August 4, 1961; the coldest is 42°F, on August 24, 1992. The wettest August brought 3.11 in (1977).
The August mean against the 1991-2020 normal of 75.2°F: 2021 74.4°F (−0.8), 2022 78.5°F (+3.3), 2023 75.4°F (+0.2), 2024 74.0°F (−1.2), 2025 77.1°F (+1.9), 2026 75.7°F (+0.5). 4 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 74.4°F | −0.8°F | 0.27 in |
| 2022 | 78.5°F | +3.3°F | 0.66 in |
| 2023 | 75.4°F | +0.2°F | 0.43 in |
| 2024 | 74.0°F | −1.2°F | 0.14 in |
| 2025 | 77.1°F | +1.9°F | 0.11 in |
| 2026 | 75.7°F | +0.5°F | 0.00 in |
Source: records: ACIS, station USW00024160; recent months: ACIS, station USW00024160. Records and recent months use complete months only.
How does August in Walla Walla compare across Washington?
Across the 96 places PlainClimate covers in Washington, August normal highs run from 67°F in Long Beach to 91°F in Pasco; Walla Walla's is 89°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.