Climate averages 1991–2020
Beaverton 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 Beaverton: daytime highs average 18.5°C and nights cool to about 8.3°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 70 mm of rain on roughly 11 days, which makes May a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 52 min on an average May day.
The nearest other city in this atlas is Portland (11 km away). In May its highs average 18.8°C, about as warm as Beaverton, with 70 mm of rain.
Among the 498 cities listed in the United States, Beaverton ranks joint 461st of 498 for the warmest May highs and joint 185th of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Beaverton is 5.3°C cooler than that mean.
From May to June, average highs rise by 3.0°C to 21.4°C, and monthly rainfall falls from 70 mm to 43 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
Beaverton climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.9°C1.6°C | 1.6°C | 167 | 17.3 | 9.19 h |
| February | 9.6°C1.8°C | 1.8°C | 130 | 15.0 | 10.310 h |
| March | 12.0°C3.3°C | 3.3°C | 145 | 17.5 | 11.912 h |
| April | 14.4°C5.1°C | 5.1°C | 115 | 16.1 | 13.513 h |
| May, selected | 18.5°C8.3°C | 8.3°C | 70 | 11.1 | 14.915 h |
| June | 21.4°C10.9°C | 10.9°C | 43 | 7.6 | 15.616 h |
| July | 26.6°C13.7°C | 13.7°C | 12 | 2.3 | 15.315 h |
| August | 27.1°C14.2°C | 14.2°C | 14 | 2.6 | 14.114 h |
| September | 23.7°C12.0°C | 12.0°C | 42 | 6.2 | 12.613 h |
| October | 16.6°C7.9°C | 7.9°C | 106 | 11.8 | 11.011 h |
| November | 10.7°C4.0°C | 4.0°C | 174 | 17.3 | 9.610 h |
| December | 7.3°C1.5°C | 1.5°C | 193 | 18.0 | 8.89 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
- Portland in MayUnited States · 11 kmHigh 18.8°C · Low 8.8°C · 70 mm rain
- Hillsboro in MayUnited States · 15 kmHigh 18.6°C · Low 8.4°C · 69 mm rain
- Vancouver, United States in MayUnited States · 20 kmHigh 18.5°C · Low 8.5°C · 89 mm rain
- Gresham in MayUnited States · 29 kmHigh 17.8°C · Low 7.9°C · 89 mm rain
- Salem, United States in MayUnited States · 63 kmHigh 18.6°C · Low 8.2°C · 56 mm rain
- Eugene in MayUnited States · 161 kmHigh 18.0°C · Low 7.8°C · 82 mm rain
- Bend in MayUnited States · 198 kmHigh 16.9°C · Low 4.4°C · 45 mm rain
- Tacoma in MayUnited States · 198 kmHigh 17.2°C · Low 8.4°C · 61 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 Beaverton) is explained once on the Beaverton year overview and on the Sources, method and limits page.
Portland lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.