San Mateo County Weather in March
Average highs run from 60°F on March 1 to 61°F on March 31, and lows from 43°F to 44°F. Normal precipitation for the month is 3.67 in over about 14 wet days.
March day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
March at a glance
- Average high
- 60°F
- Average low
- 44°F
- Precipitation
- 3.67 in
- Record high
- 94°FMar 20, 2026
- Record low
- 29°FMar 2, 1953
- Chance of a freeze
- 17%
- Daylight
- 11 h 24 min to 12 h 35 min
- Cloud cover
- 60%
- Humidity
- 84%
- Dew point
- 48°F
- Wind
- 10.5 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Mar 1 | 60°F | 43°F | 76°F 1936 | 31°F 1939 | 49% |
| Mar 2 | 60°F | 43°F | 79°F 1936 | 29°F 1953 | 49% |
| Mar 3 | 60°F | 43°F | 80°F 1931 | 30°F 1951 | 48% |
| Mar 4 | 60°F | 43°F | 78°F 1959 | 30°F 1932 | 48% |
| Mar 5 | 60°F | 43°F | 78°F 1959 | 32°F 1967 | 48% |
| Mar 6 | 60°F | 43°F | 80°F 1972 | 30°F 1971 | 47% |
| Mar 7 | 60°F | 44°F | 80°F 1972 | 31°F 1976 | 47% |
| Mar 8 | 60°F | 44°F | 81°F 2004 | 33°F 1945 | 47% |
| Mar 9 | 60°F | 44°F | 82°F 1934 | 31°F 1976 | 46% |
| Mar 10 | 60°F | 44°F | 86°F 2005 | 31°F 1935 | 46% |
| Mar 11 | 60°F | 44°F | 85°F 2005 | 32°F 1935 | 46% |
| Mar 12 | 60°F | 44°F | 83°F 2005 | 31°F 1950 | 45% |
| Mar 13 | 60°F | 44°F | 80°F 2004 | 32°F 1950 | 45% |
| Mar 14 | 60°F | 44°F | 86°F 2015 | 32°F 1977 | 45% |
| Mar 15 | 60°F | 44°F | 85°F 2026 | 34°F 1944 | 44% |
| Mar 16 | 60°F | 44°F | 90°F 2026 | 35°F 1950 | 44% |
| Mar 17 | 61°F | 44°F | 93°F 2026 | 32°F 1966 | 44% |
| Mar 18 | 61°F | 44°F | 90°F 2026 | 35°F 1945 | 43% |
| Mar 19 | 61°F | 44°F | 91°F 2026 | 34°F 1935 | 43% |
| Mar 20 | 61°F | 44°F | 94°F 2026 | 34°F 1952 | 43% |
| Mar 21 | 61°F | 44°F | 83°F 1965 | 33°F 1955 | 42% |
| Mar 22 | 61°F | 44°F | 85°F 2022 | 31°F 1933 | 42% |
| Mar 23 | 61°F | 44°F | 83°F 2026 | 34°F 1946 | 42% |
| Mar 24 | 61°F | 44°F | 87°F 2025 | 33°F 1933 | 41% |
| Mar 25 | 61°F | 44°F | 87°F 2025 | 32°F 1964 | 41% |
| Mar 26 | 61°F | 44°F | 84°F 2015 | 33°F 1936 | 40% |
| Mar 27 | 61°F | 44°F | 85°F 2026 | 33°F 2023 | 40% |
| Mar 28 | 61°F | 44°F | 84°F 2026 | 36°F 1950 | 39% |
| Mar 29 | 61°F | 44°F | 88°F 2026 | 35°F 1932 | 39% |
| Mar 30 | 61°F | 44°F | 84°F 2011 | 33°F 1938 | 38% |
| Mar 31 | 61°F | 44°F | 89°F 2011 | 34°F 1938 | 38% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- March 1
- sunrise 6:40 AM, sunset 6:04 PM
- March 31
- sunrise 6:56 AM, sunset 7:31 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00043714 (Half Moon Bay), public domain. Records: NOAA GHCN-Daily, station USC00047339, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.