Climate averages 1991–2020
Renton weather
in May.
A mild, moderately wet month: the 5th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Renton: daytime highs average 17.6°C and nights cool to about 8.4°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 76 mm of rain on roughly 12 days, which makes May a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 05 min on an average May day.
The nearest other city in this atlas is Kent (11 km away). In May its highs average 17.6°C, about as warm as Renton, with 76 mm of rain.
Among the 498 cities listed in the United States, Renton ranks joint 478th of 498 for the warmest May highs and joint 198th of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Renton is 6.2°C cooler than that mean.
From May to June, average highs rise by 2.5°C to 20.0°C, and monthly rainfall falls from 76 mm to 59 mm.
The annual picture
May 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
Renton climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.7°C1.8°C | 1.8°C | 176 | 18.4 | 8.99 h |
| February | 9.0°C1.7°C | 1.7°C | 121 | 14.7 | 10.210 h |
| March | 11.2°C3.0°C | 3.0°C | 139 | 17.5 | 11.912 h |
| April | 13.9°C4.9°C | 4.9°C | 113 | 14.9 | 13.614 h |
| May, selected | 17.6°C8.4°C | 8.4°C | 76 | 12.0 | 15.115 h |
| June | 20.0°C11.2°C | 11.2°C | 59 | 9.5 | 15.916 h |
| July | 24.1°C14.0°C | 14.0°C | 25 | 5.0 | 15.516 h |
| August | 24.5°C14.3°C | 14.3°C | 33 | 4.8 | 14.314 h |
| September | 21.1°C11.6°C | 11.6°C | 67 | 8.4 | 12.613 h |
| October | 15.2°C7.7°C | 7.7°C | 134 | 14.1 | 10.911 h |
| November | 10.1°C4.2°C | 4.2°C | 194 | 18.0 | 9.49 h |
| December | 7.1°C1.8°C | 1.8°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
May in nearby cities
- Kent in MayUnited States · 11 kmHigh 17.6°C · Low 8.4°C · 76 mm rain
- Bellevue in MayUnited States · 14 kmHigh 17.3°C · Low 8.1°C · 76 mm rain
- Seattle in MayUnited States · 16 kmHigh 17.1°C · Low 8.2°C · 76 mm rain
- Federal Way in MayUnited States · 19 kmHigh 16.7°C · Low 7.7°C · 78 mm rain
- Auburn in MayUnited States · 20 kmHigh 17.3°C · Low 8.0°C · 78 mm rain
- Kirkland in MayUnited States · 22 kmHigh 16.8°C · Low 7.9°C · 80 mm rain
- Tacoma in MayUnited States · 31 kmHigh 17.2°C · Low 8.4°C · 61 mm rain
- Everett in MayUnited States · 55 kmHigh 16.7°C · Low 8.1°C · 89 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 Renton) is explained once on the Renton year overview and on the Sources, method and limits page.
Seattle, Bellevue and Kent lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.