Climate averages 1991–2020
Berkeley weather
in May.
A mild, fairly dry month: the 6th warmest and the 5th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Berkeley: daytime highs average 21.8°C and nights cool to about 10.6°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 17 mm of rain on roughly 3 days, which makes May a fairly dry month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 12 min on an average May day.
The nearest other city in this atlas is Oakland (7 km away). In May its highs average 21.7°C, about as warm as Berkeley, with 17 mm of rain.
Among the 498 cities listed in the United States, Berkeley ranks joint 308th of 498 for the warmest May highs and joint 88th of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Berkeley is 2.0°C cooler than that mean.
From May to June, average highs rise by 3.1°C to 24.9°C, and monthly rainfall falls from 17 mm to 3.6 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
Berkeley climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 13.7°C5.4°C | 5.4°C | 93 | 9.4 | 9.910 h |
| February | 15.1°C6.3°C | 6.3°C | 97 | 9.2 | 10.811 h |
| March | 16.8°C7.5°C | 7.5°C | 73 | 8.8 | 11.912 h |
| April | 18.9°C8.6°C | 8.6°C | 34 | 4.9 | 13.213 h |
| May, selected | 21.8°C10.6°C | 10.6°C | 17 | 3.2 | 14.214 h |
| June | 24.9°C12.2°C | 12.2°C | 3.6 | 0.9 | 14.715 h |
| July | 25.9°C13.1°C | 13.1°C | 0.4 | 0.2 | 14.515 h |
| August | 26.2°C13.6°C | 13.6°C | 0.9 | 0.1 | 13.614 h |
| September | 26.2°C13.2°C | 13.2°C | 1.4 | 0.4 | 12.512 h |
| October | 23.2°C11.7°C | 11.7°C | 21 | 2.9 | 11.211 h |
| November | 17.4°C8.3°C | 8.3°C | 46 | 5.7 | 10.210 h |
| December | 13.6°C5.7°C | 5.7°C | 87 | 9.3 | 9.610 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
- Oakland in MayUnited States · 7 kmHigh 21.7°C · Low 10.9°C · 17 mm rain
- San Francisco in MayUnited States · 17 kmHigh 18.8°C · Low 10.4°C · 18 mm rain
- Concord (California), United States in MayUnited States · 24 kmHigh 23.8°C · Low 11.3°C · 17 mm rain
- Daly City in MayUnited States · 25 kmHigh 16.5°C · Low 10.0°C · 18 mm rain
- Vallejo in MayUnited States · 26 kmHigh 23.7°C · Low 10.7°C · 19 mm rain
- San Ramon in MayUnited States · 28 kmHigh 22.5°C · Low 10.8°C · 17 mm rain
- Hayward in MayUnited States · 28 kmHigh 21.7°C · Low 10.8°C · 17 mm rain
- San Mateo in MayUnited States · 35 kmHigh 19.3°C · Low 10.9°C · 20 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 Berkeley) is explained once on the Berkeley year overview and on the Sources, method and limits page.
Oakland lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.