Sunnyvale, CA weather in March
March in Sunnyvale: cool, with frequent rain. Highs 65°F, lows 47°F, about 10 days with rain. A good month for most outdoor plans.
- Normal high
- 65°F
- Normal low
- 47°F
- Wet days
- 10
- 2.0 in total
- Muggy days
- 0
- dew point 65°F+
How March changes from start to finish
| March 1 | March 31 | |
|---|---|---|
| Normal high | 64°F | 66°F |
| Normal low | 46°F | 48°F |
| Chance of a wet day | 37% | 28% |
| Sunrise / sunset | 6:39 am / 6:01 pm | 6:54 am / 7:29 pm |
| Daylight | 11.4 h | 12.6 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical March day
- 6 am50°Fdew point 45°F
- 9 am54°Fdew point 47°F
- Noon59°Fdew point 47°F
- 3 pm60°Fdew point 46°F
- 6 pm56°Fdew point 46°F
- 9 pm53°Fdew point 46°F
NOAA hourly normals (local standard time) from San Francisco Intl Airport (25 mi away); average wind 10 mph; clear or few clouds in 31% of daytime hours, mostly cloudy or overcast in 52%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F16 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow10 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per March, counted from daily records for each year 1991-2020.
Rain in March
Normal precipitation is 2.0 in; a dry March brings about 1.0 in and a wet one about 2.8 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How March varies from year to year
- Warmest March, 1991-20202004: average high 72°F
- Coolest March1999: average high 59°F
- Wettest March1991: 5.3 in
- Driest March2015: 0.2 in
- Highest reading84°F (March 26, 2015)
- Lowest reading35°F (March 10, 2009)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
March compared with February and April
| February | March | April | |
|---|---|---|---|
| Normal high | 62°F | 65°F | 68°F |
| Normal low | 45°F | 47°F | 49°F |
| Wet days | 11 | 10 | 6 |
| Comfortable days | 8 | 16 | 18 |
| Daylight | 10.8 h | 12.0 h | 13.2 h |
Highs change by +3°F from February and +3°F into April.
Nearby alternatives in March
- Warmer: Bakersfield, CA217 mi · high 70°F · 6 wet days
- Drier: Visalia, CA168 mi · high 67°F · 7 wet days
- Cooler: Yosemite Valley, CA137 mi · high 57°F · 11 wet days
How Sunnyvale ranks in March
- Normal high158th warmest of 378 cities; 50th of 60 in California
- Wet days234th driest of 378
- Comfortable days67th most of 339
What to pack for Sunnyvale in March
- A rain jacket or umbrella – rain on about 10 days
Heating and cooling
March has 285 heating degree days and 1 cooling degree days (base 65°F), 11% of the year's total heating and cooling demand.
Questions
How cold is Sunnyvale in March?
The normal high is 65°F and the normal low is 47°F. From 1991 to 2020 the coldest March reading was 35°F (March 10, 2009).
Does it rain a lot in Sunnyvale in March?
About 10 days in March have at least 0.01 in of precipitation, and the normal total is 2.0 in. The wettest March in 1991-2020 was in 1991 (5.3 in); the driest was in 2015 (0.2 in).
Is March a good time to visit Sunnyvale?
March ranks 8th of 12 months on our comfort score for Sunnyvale (68 out of 100). It has about 16 comfortable days. The best months are May, June and July.
Where the numbers come from
- Temperature, rain and frost dates: Moffett Federal Airfield (USW00023244), 2.6 mi NNW of the city center, 39 ft (85 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Snowfall: Palo Alto (USC00046646), 7.7 mi NW of the city center, 25 ft (99 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Snow depth: Newark (USC00046144), 10 mi N of the city center, 10 ft (114 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: San Francisco Intl Airport (USW00023234), 25 mi NW of the city center, 8 ft (116 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: N Y. Mineta Sn Jo Intl Apt (724945-23293), 6.2 mi E of the city center, 49 ft (75 ft lower than the city). Hourly observations, 1991-2020.