Climate averages 1991–2020
San Mateo weather
in June.
A mild, very dry month: the 4th warmest and the 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
June is a mild month in San Mateo: daytime highs average 21.8°C and nights cool to about 12.4°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 3.9 mm of rain on fewer than one day, which makes June a very dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 43 min on an average June day.
The nearest other city in this atlas is Redwood City (12 km away). In June its highs average 22.5°C, 0.6°C warmer than San Mateo, with 3.9 mm of rain.
Among the 498 cities listed in the United States, San Mateo ranks joint 468th of 498 for the warmest June highs and joint 90th of 498 for the driest June (rainfall, lowest first). The mean June high of those 498 cities is 27.9°C; San Mateo is 6.1°C cooler than that mean.
From June to July, average highs rise by 1.4°C to 23.2°C, and monthly rainfall falls from 3.9 mm to under 1 mm.
The annual picture
June 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
San Mateo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 13.9°C6.7°C | 6.7°C | 99 | 9.4 | 9.910 h |
| February | 14.8°C7.5°C | 7.5°C | 107 | 9.5 | 10.811 h |
| March | 16.1°C8.5°C | 8.5°C | 82 | 9.1 | 11.912 h |
| April | 17.4°C9.3°C | 9.3°C | 41 | 5.6 | 13.113 h |
| May | 19.3°C10.9°C | 10.9°C | 20 | 3.3 | 14.214 h |
| June, selected | 21.8°C12.4°C | 12.4°C | 3.9 | 0.9 | 14.715 h |
| July | 23.2°C13.7°C | 13.7°C | 0.5 | 0.2 | 14.514 h |
| August | 23.6°C14.2°C | 14.2°C | 0.7 | 0.1 | 13.614 h |
| September | 24.0°C14.2°C | 14.2°C | 1.8 | 0.4 | 12.512 h |
| October | 21.7°C12.9°C | 12.9°C | 23 | 3.0 | 11.311 h |
| November | 17.0°C9.9°C | 9.9°C | 51 | 6.0 | 10.210 h |
| December | 13.7°C7.2°C | 7.2°C | 94 | 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
June in nearby cities
- Redwood City in JuneUnited States · 12 kmHigh 22.5°C · Low 12.4°C · 3.9 mm rain
- Daly City in JuneUnited States · 20 kmHigh 18.3°C · Low 11.3°C · 4.3 mm rain
- Hayward in JuneUnited States · 25 kmHigh 24.9°C · Low 12.7°C · 3.4 mm rain
- San Francisco in JuneUnited States · 25 kmHigh 21.0°C · Low 11.7°C · 4.3 mm rain
- Union City in JuneUnited States · 27 kmHigh 25.6°C · Low 13.0°C · 4.0 mm rain
- Oakland in JuneUnited States · 27 kmHigh 24.8°C · Low 12.6°C · 3.6 mm rain
- Mountain View in JuneUnited States · 29 kmHigh 23.9°C · Low 12.7°C · 4.0 mm rain
- Fremont in JuneUnited States · 30 kmHigh 25.1°C · Low 13.0°C · 4.0 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 San Mateo) is explained once on the San Mateo year overview and on the Sources, method and limits page.
Redwood City lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.