Climate averages 1991–2020
Seattle weather
in April.
A cool, wet month: the 7th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a cool month in Seattle: daytime highs average 13.4°C and nights cool to about 4.8°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 113 mm of rain on roughly 15 days, which makes April a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 36 min on an average April day.
The nearest other city in this atlas is Bellevue (10 km away). In April its highs average 13.7°C, about as warm as Seattle, with 113 mm of rain.
Among the 498 cities listed in the United States, Seattle ranks joint 432nd of 498 for the warmest April highs and joint 426th of 498 for the driest April (rainfall, lowest first). The mean April high of those 498 cities is 19.4°C; Seattle is 5.9°C cooler than that mean.
From April to May, average highs rise by 3.7°C to 17.1°C, and monthly rainfall falls from 113 mm to 76 mm.
The annual picture
April in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Seattle climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.2°C1.6°C | 1.6°C | 176 | 18.4 | 8.99 h |
| February | 8.6°C1.4°C | 1.4°C | 121 | 14.7 | 10.210 h |
| March | 10.8°C2.9°C | 2.9°C | 139 | 17.5 | 11.912 h |
| April, selected | 13.4°C4.8°C | 4.8°C | 113 | 14.9 | 13.614 h |
| May | 17.1°C8.2°C | 8.2°C | 76 | 12.0 | 15.115 h |
| June | 19.7°C11.0°C | 11.0°C | 59 | 9.5 | 15.916 h |
| July | 23.7°C13.6°C | 13.6°C | 25 | 5.0 | 15.616 h |
| August | 24.0°C13.9°C | 13.9°C | 33 | 4.8 | 14.314 h |
| September | 20.6°C11.3°C | 11.3°C | 67 | 8.4 | 12.613 h |
| October | 14.6°C7.4°C | 7.4°C | 134 | 14.1 | 10.911 h |
| November | 9.6°C4.0°C | 4.0°C | 194 | 18.0 | 9.49 h |
| December | 6.6°C1.6°C | 1.6°C | 178 | 17.7 | 8.59 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
April in nearby cities
- Bellevue in AprilUnited States · 10 kmHigh 13.7°C · Low 4.8°C · 113 mm rain
- Kirkland in AprilUnited States · 12 kmHigh 13.2°C · Low 4.6°C · 113 mm rain
- Renton in AprilUnited States · 16 kmHigh 13.9°C · Low 4.9°C · 113 mm rain
- Kent in AprilUnited States · 26 kmHigh 13.9°C · Low 4.9°C · 113 mm rain
- Federal Way in AprilUnited States · 32 kmHigh 12.9°C · Low 4.2°C · 118 mm rain
- Auburn in AprilUnited States · 34 kmHigh 13.6°C · Low 4.6°C · 118 mm rain
- Tacoma in AprilUnited States · 40 kmHigh 13.4°C · Low 4.9°C · 99 mm rain
- Everett in AprilUnited States · 43 kmHigh 13.2°C · Low 5.0°C · 133 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Seattle) is explained once on the Seattle year overview and on the Sources, method and limits page.
Bellevue, Kent and Renton lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.