NOAA NCEI Climate Normals 1991–2020
Washington Weather by Month
Temperature, rain and the hurricane season at 81 Washington stations, month by month.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
The median station records 33.4 inches of precipitation a year; Cedar Lake, WA records the most, 99.9 inches, and Richland, WA the least, 7.2 (13.9 times as much). August is the hottest month at the median station (average high 80°F); the hottest August is at Pasco Tri Cities Airport, WA, 91°F. December is the coldest (average low 32°F); the coldest December nights are at Winthrop 1 WSW, WA, 15°F. Highs reach 90°F on 11 days a year at the median station and on 55 at Pasco Tri Cities Airport, WA, the most. Snowfall is heaviest at Leavenworth 3 S, WA, 80.2 inches a year; 2 of the 44 stations that measure snow average less than half an inch.
This page compares the 1991–2020 NOAA climate normals of 81 Washington weather stations, each the nearest station with full normals to at least one of the 226 Washington cities on this site that have one within 25 miles.
At the median station, November is the wettest month (5.0 inches) and July the driest (0.6). Station by station, the wettest month is November at 38, December at 36 and January at 6 of the 81, and the driest July at 60 and August at 21. The gap between the wettest and driest station is widest in December: 15.2 inches.
Month by month across Washington
High, low and precipitation are the median of the 81 stations; the station columns name the station with the highest average high, the lowest average low, and the most and least precipitation that month, each linked to the city page it serves. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
Coastal water temperature by month
Across 6 NOAA tide stations, the water is warmest in August (median 58°F, up to 72°F at Longview, WA) and coolest in February (median 47°F, down to 42°F at Longview, WA). No month averages 80°F at the median station.
| Station | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Friday Harbor, WA | 47 | 46 | 46 | 48 | 49 | 51 | 53 | 53 | 53 | 51 | 50 | 48 |
| Port Townsend, WA | 47 | 46 | 47 | 48 | 50 | 51 | 53 | 53 | 53 | 51 | 50 | 48 |
| Tacoma, WA | 49 | 48 | 48 | 49 | 51 | 53 | 55 | 56 | 56 | 55 | 53 | 51 |
| Westport, WA | 48 | 47 | 49 | 51 | 54 | 56 | 57 | 59 | 58 | 56 | 52 | 49 |
| Toke Point, WA | 48 | 47 | 49 | 53 | 57 | 60 | 62 | 63 | 61 | 57 | 52 | 49 |
| Longview, WA | 43 | 42 | 45 | 50 | 56 | 62 | 70 | 72 | 68 | 62 | 52 | 46 |
°F, average of hourly readings 2021–2025; a month counts when at least three years have half their hours on record. Source: NOAA Tides & Currents; the newest readings are preliminary.
Washington cities and their stations
How stations are matched to cities and what normals are: methodology · other states by month