Climate averages 1991–2020
Hayward weather
in March.
A mild, moderately wet month: the 9th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a mild month in Hayward: daytime highs average 17.0°C and nights cool to about 8.0°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 70 mm of rain on roughly 8 days, which makes March a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 56 min on an average March day.
The nearest other city in this atlas is Union City (10 km away). In March its highs average 17.2°C, about as warm as Hayward, with 75 mm of rain.
Among the 498 cities listed in the United States, Hayward ranks joint 224th of 498 for the warmest March highs and joint 222nd of 498 for the driest March (rainfall, lowest first). The mean March high of those 498 cities is 14.9°C; Hayward is 2.0°C warmer than that mean.
From March to April, average highs rise by 1.9°C to 18.9°C, and monthly rainfall falls from 70 mm to 33 mm.
The annual picture
March 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
Hayward climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 14.0°C5.8°C | 5.8°C | 89 | 8.9 | 9.910 h |
| February | 15.2°C6.8°C | 6.8°C | 94 | 9.0 | 10.811 h |
| March, selected | 17.0°C8.0°C | 8.0°C | 70 | 8.4 | 11.912 h |
| April | 18.9°C9.0°C | 9.0°C | 33 | 4.8 | 13.113 h |
| May | 21.7°C10.8°C | 10.8°C | 17 | 3.0 | 14.214 h |
| June | 24.9°C12.7°C | 12.7°C | 3.4 | 0.9 | 14.715 h |
| July | 26.5°C14.1°C | 14.1°C | 0.7 | 0.2 | 14.514 h |
| August | 26.7°C14.5°C | 14.5°C | 1.4 | 0.2 | 13.614 h |
| September | 26.5°C14.3°C | 14.3°C | 1.7 | 0.4 | 12.512 h |
| October | 23.2°C12.5°C | 12.5°C | 21 | 2.9 | 11.311 h |
| November | 17.5°C9.0°C | 9.0°C | 42 | 5.5 | 10.210 h |
| December | 13.8°C6.2°C | 6.2°C | 81 | 8.7 | 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
March in nearby cities
- Union City in MarchUnited States · 10 kmHigh 17.2°C · Low 8.2°C · 75 mm rain
- San Ramon in MarchUnited States · 15 kmHigh 17.0°C · Low 7.3°C · 70 mm rain
- Fremont in MarchUnited States · 16 kmHigh 17.1°C · Low 8.4°C · 75 mm rain
- Pleasanton in MarchUnited States · 18 kmHigh 17.3°C · Low 7.5°C · 67 mm rain
- Oakland in MarchUnited States · 23 kmHigh 17.0°C · Low 7.8°C · 73 mm rain
- San Mateo in MarchUnited States · 25 kmHigh 16.1°C · Low 8.5°C · 82 mm rain
- Redwood City in MarchUnited States · 25 kmHigh 16.2°C · Low 8.6°C · 82 mm rain
- Livermore in MarchUnited States · 28 kmHigh 17.3°C · Low 7.1°C · 67 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 Hayward) is explained once on the Hayward year overview and on the Sources, method and limits page.
San Ramon lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.