Sunnyvale weather in March: Sunnyvale, California: normal highs, lows, rain and records for March
Sunnyvale in March has a normal high of 65°F and a normal low of 47°F, a daily mean of 56°F, rising from 64°F on the 1st to 66°F by the 31st. Measurable precipitation falls on 10 days in a normal March, 2.04 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 18°C and low of 8°C, 52 mm of precipitation in March.
- NOAA stationMoffett Federal Airfield
- Station IDUSW00023244
- Location37.41°N 122.05°W
- Elevation39 ft (12 m)
- From the center2 miles
- Population156,792
- Jan 59° 42°
- Feb 62° 45°
- Mar 65° 47°
- Apr 68° 49°
- May 72° 53°
- Jun 76° 56°
- Jul 77° 59°
- Aug 77° 59°
- Sep 78° 57°
- Oct 74° 53°
- Nov 66° 46°
- Dec 59° 42°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Sunnyvale in March?
The normal high is 65°F and the normal low 47°F, for a daily mean of 55.8°F. March is 2.7°F warmer than February and 2.6°F cooler than April. March is the 9th warmest month of the year in Sunnyvale and the 4th wettest. Across the month the normal high rises 2°F, from 64°F on March 1 to 66°F on March 31. From one year to the next March's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Marchs in three average between 54°F and 58°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 38%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| March 1 | 64°F | 46°F | 38% | 21% |
| March 8 | 64°F | 46°F | 35% | 20% |
| March 15 | 65°F | 47°F | 33% | 18% |
| March 22 | 66°F | 47°F | 30% | 17% |
| March 31 | 66°F | 48°F | 26% | 15% |
Every day of March: normal high, low and chance of precipitation (warmest afternoon March 31, coldest night March 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| March 1 | 64°F | 46°F | 38% | 21% | 11 h 20 min |
| March 2 | 64°F | 46°F | 38% | 21% | 11 h 20 min |
| March 3 | 64°F | 46°F | 37% | 21% | 11 h 20 min |
| March 4 | 64°F | 46°F | 37% | 21% | 11 h 30 min |
| March 5 | 64°F | 46°F | 37% | 21% | 11 h 30 min |
| March 6 | 64°F | 46°F | 36% | 20% | 11 h 30 min |
| March 7 | 64°F | 46°F | 36% | 20% | 11 h 30 min |
| March 8 | 64°F | 46°F | 35% | 20% | 11 h 40 min |
| March 9 | 64°F | 46°F | 35% | 19% | 11 h 40 min |
| March 10 | 65°F | 46°F | 34% | 19% | 11 h 40 min |
| March 11 | 65°F | 46°F | 34% | 19% | 11 h 40 min |
| March 12 | 65°F | 47°F | 34% | 19% | 11 h 50 min |
| March 13 | 65°F | 47°F | 33% | 19% | 11 h 50 min |
| March 14 | 65°F | 47°F | 33% | 18% | 11 h 50 min |
| March 15 | 65°F | 47°F | 33% | 18% | 11 h 50 min |
| March 16 | 65°F | 47°F | 32% | 18% | 12 h |
| March 17 | 65°F | 47°F | 32% | 18% | 12 h |
| March 18 | 65°F | 47°F | 31% | 18% | 12 h |
| March 19 | 65°F | 47°F | 31% | 18% | 12 h |
| March 20 | 65°F | 47°F | 31% | 17% | 12 h 10 min |
| March 21 | 65°F | 47°F | 31% | 17% | 12 h 10 min |
| March 22 | 66°F | 47°F | 30% | 17% | 12 h 10 min |
| March 23 | 66°F | 47°F | 30% | 17% | 12 h 10 min |
| March 24 | 66°F | 47°F | 29% | 17% | 12 h 20 min |
| March 25 | 66°F | 47°F | 29% | 17% | 12 h 20 min |
| March 26 | 66°F | 47°F | 29% | 16% | 12 h 20 min |
| March 27 | 66°F | 47°F | 28% | 16% | 12 h 20 min |
| March 28 | 66°F | 47°F | 28% | 16% | 12 h 20 min |
| March 29 | 66°F | 47°F | 27% | 15% | 12 h 30 min |
| March 30 | 66°F | 48°F | 27% | 15% | 12 h 30 min |
| March 31 | 66°F | 48°F | 26% | 15% | 12 h 30 min |
- Normal high
- 65°FMarch average
- Normal low
- 47°FMarch average
- Precipitation
- 2.04 inmonth total
- Days with precipitation
- 100.01 inch or more
- Daylight
- 11 h 20 min to 12 h 30 minMarch 1 to March 31
- Days at 70°F or more
- 7
- Days at 80°F or more
- 1
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023244; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Sunnyvale in March?
On a given March day the chance of 0.01 inch or more is 32% on average, highest around March 1 (38%). In all, 2.04 in falls on 10 days of a normal March.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023244.
What are the records for March in Sunnyvale?
The warmest March temperature on this station's record (since 1945) is 86°F, on March 21, 2026; the coldest is 30°F, on March 3, 1951. The wettest March brought 6.39 in (1983).
The March mean against the 1991-2020 normal of 55.8°F: 2025 55.4°F (−0.4), 2026 63.9°F (+8.1). 1 of 2 ran warmer than normal.
| March | Mean | Against normal | Precip. |
|---|---|---|---|
| 2025 | 55.4°F | −0.4°F | – |
| 2026 | 63.9°F | +8.1°F | – |
Source: records: ACIS, station USW00023244; recent months: ACIS, station USW00023244. Records and recent months use complete months only.
How does March in Sunnyvale compare across California?
Across the 219 places PlainClimate covers in California, March normal highs run from 43°F in Tahoma to 81°F in Brawley; Sunnyvale's is 65°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.