Spokane weather in August: Spokane, Washington: normal highs, lows, rain and records for August
Spokane in August has a normal high of 84°F and a normal low of 57°F, a daily mean of 70°F, falling from 87°F on the 1st to 79°F by the 31st. Measurable precipitation falls on 3 days in a normal August, 0.47 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 14°C, 12 mm of precipitation in August.
- NOAA stationSpokane International Airport
- Station IDUSW00024157
- Location47.62°N 117.53°W
- Elevation2,353 ft (717 m)
- From the center5 miles
- Population230,609
- Jan 35° 25°
- Feb 40° 26°
- Mar 49° 32°
- Apr 57° 37°
- May 67° 45°
- Jun 74° 51°
- Jul 84° 58°
- Aug 84° 57°
- Sep 74° 49°
- Oct 58° 38°
- Nov 42° 30°
- Dec 34° 24°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Spokane in August?
The normal high is 84°F and the normal low 57°F, for a daily mean of 70.3°F. August is 0.7°F cooler than July and 9.2°F warmer than September. August is the 2nd warmest month of the year in Spokane and the 11th wettest. Across the month the normal high falls 8°F, from 87°F on August 1 to 79°F on August 31. From one year to the next August's mean temperature typically moves about 2.1°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 68°F and 72°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 13%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 87°F | 60°F | 10% | 4% |
| August 8 | 86°F | 59°F | 10% | 4% |
| August 15 | 84°F | 57°F | 10% | 4% |
| August 22 | 82°F | 55°F | 11% | 4% |
| August 31 | 79°F | 53°F | 13% | 5% |
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 | 87°F | 60°F | 10% | 4% | 15 h |
| August 2 | 87°F | 59°F | 10% | 4% | 15 h |
| August 3 | 87°F | 59°F | 10% | 4% | 15 h |
| August 4 | 87°F | 59°F | 10% | 4% | 14 h 50 min |
| August 5 | 87°F | 59°F | 10% | 4% | 14 h 50 min |
| August 6 | 87°F | 59°F | 10% | 4% | 14 h 50 min |
| August 7 | 86°F | 59°F | 10% | 4% | 14 h 40 min |
| August 8 | 86°F | 59°F | 10% | 4% | 14 h 40 min |
| August 9 | 86°F | 59°F | 10% | 4% | 14 h 40 min |
| August 10 | 86°F | 58°F | 10% | 4% | 14 h 40 min |
| August 11 | 86°F | 58°F | 10% | 4% | 14 h 30 min |
| August 12 | 85°F | 58°F | 10% | 4% | 14 h 30 min |
| August 13 | 85°F | 58°F | 10% | 4% | 14 h 30 min |
| August 14 | 85°F | 57°F | 10% | 4% | 14 h 20 min |
| August 15 | 84°F | 57°F | 10% | 4% | 14 h 20 min |
| August 16 | 84°F | 57°F | 11% | 4% | 14 h 20 min |
| August 17 | 84°F | 57°F | 11% | 4% | 14 h 10 min |
| August 18 | 84°F | 56°F | 11% | 4% | 14 h 10 min |
| August 19 | 83°F | 56°F | 11% | 4% | 14 h 10 min |
| August 20 | 83°F | 56°F | 11% | 4% | 14 h |
| August 21 | 83°F | 56°F | 11% | 4% | 14 h |
| August 22 | 82°F | 55°F | 11% | 4% | 14 h |
| August 23 | 82°F | 55°F | 11% | 4% | 14 h |
| August 24 | 82°F | 55°F | 12% | 4% | 13 h 50 min |
| August 25 | 81°F | 55°F | 12% | 4% | 13 h 50 min |
| August 26 | 81°F | 54°F | 12% | 5% | 13 h 50 min |
| August 27 | 81°F | 54°F | 12% | 5% | 13 h 40 min |
| August 28 | 80°F | 54°F | 12% | 5% | 13 h 40 min |
| August 29 | 80°F | 54°F | 12% | 5% | 13 h 40 min |
| August 30 | 80°F | 53°F | 13% | 5% | 13 h 30 min |
| August 31 | 79°F | 53°F | 13% | 5% | 13 h 30 min |
- Normal high
- 84°FAugust average
- Normal low
- 57°FAugust average
- Precipitation
- 0.47 inmonth total
- Days with precipitation
- 30.01 inch or more
- Days at 90°F or more
- 8
- Daylight
- 15 h to 13 h 30 minAugust 1 to August 31
- Days at 70°F or more
- 29
- Days at 80°F or more
- 22
- Sunshine
- 88%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024157; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Spokane in August?
On a given August day the chance of 0.01 inch or more is 11% on average, highest around August 31 (13%). In all, 0.47 in falls on 3 days of a normal August.
In a normal August in Spokane, 8 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024157.
How humid and windy is Spokane in August?
At 3 p.m. the normal temperature is 78°F with 25% relative humidity and a dew point of 39°F; at 6 a.m. it is 55°F with 64% 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. | 55°F | 43°F | 64% | 7.0 mph | 47% |
| 9 a.m. | 65°F | 44°F | 47% | 8.8 mph | 47% |
| noon | 74°F | 42°F | 31% | 9.1 mph | 39% |
| 3 p.m. | 78°F | 39°F | 25% | 10.0 mph | 37% |
| 6 p.m. | 74°F | 39°F | 27% | 8.5 mph | 44% |
| 9 p.m. | 64°F | 40°F | 41% | 6.5 mph | 61% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024157. 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 Spokane?
The warmest August temperature on Spokane's official record (since 1881) is 108°F, on August 4, 1961; the coldest is 35°F, on August 31, 1964. The wettest August brought 2.12 in (1923).
The August mean against the 1991-2020 normal of 70.3°F: 2021 70.7°F (+0.4), 2022 76.0°F (+5.8), 2023 72.3°F (+2.0), 2024 71.7°F (+1.4), 2025 73.5°F (+3.2), 2026 71.8°F (+1.5). 6 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 70.7°F | +0.4°F | 0.15 in |
| 2022 | 76.0°F | +5.8°F | 0.00 in |
| 2023 | 72.3°F | +2.0°F | 0.98 in |
| 2024 | 71.7°F | +1.4°F | 0.26 in |
| 2025 | 73.5°F | +3.2°F | 0.06 in |
| 2026 | 71.8°F | +1.5°F | 0.00 in |
Source: records: ACIS, NWS threaded record GEGthr; recent months: ACIS, station USW00024157. Records and recent months use complete months only.
How does August in Spokane 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; Spokane's is 84°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.