Sunnyvale Weather in May
Average highs run from 70°F on May 1 to 74°F on May 31, and lows from 51°F to 54°F. Normal precipitation for the month is 0.43 in over about 3 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 72°F
- Average low
- 53°F
- Precipitation
- 0.43 in
- Record high
- 103°FMay 12, 1976
- Record low
- 38°FMay 4, 1952
- Chance of a freeze
- 0%
- Days of 90°F or more
- 0.8
- Daylight
- 13 h 45 min to 14 h 34 min
- Cloud cover
- 33%
- Humidity
- 74%
- Dew point
- 48°F
- Wind
- 8.5 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 |
|---|---|---|---|---|---|
| May 1 | 70°F | 51°F | 91°F 1947 | 39°F 1948 | 12% |
| May 2 | 70°F | 51°F | 91°F 1990 | 41°F 1948 | 12% |
| May 3 | 70°F | 51°F | 90°F 2017 | 40°F 1949 | 12% |
| May 4 | 70°F | 51°F | 88°F 1990 | 38°F 1952 | 11% |
| May 5 | 70°F | 51°F | 94°F 1987 | 41°F 1952 | 11% |
| May 6 | 70°F | 51°F | 95°F 1987 | 38°F 1950 | 11% |
| May 7 | 71°F | 51°F | 94°F 1987 | 42°F 1950 | 10% |
| May 8 | 71°F | 52°F | 91°F 2001 | 40°F 1950 | 10% |
| May 9 | 71°F | 52°F | 94°F 1993 | 42°F 1950 | 10% |
| May 10 | 71°F | 52°F | 87°F 1993 | 43°F 1948 | 9% |
| May 11 | 71°F | 52°F | 86°F 1981 | 45°F 1947 | 9% |
| May 12 | 71°F | 52°F | 103°F 1976 | 43°F 1948 | 9% |
| May 13 | 71°F | 52°F | 92°F 2014 | 43°F 1947 | 9% |
| May 14 | 71°F | 52°F | 91°F 2014 | 42°F 1948 | 9% |
| May 15 | 72°F | 52°F | 99°F 2008 | 41°F 1955 | 9% |
| May 16 | 72°F | 53°F | 94°F 2008 | 41°F 1948 | 8% |
| May 17 | 72°F | 53°F | 93°F 2009 | 44°F 1976 | 8% |
| May 18 | 72°F | 53°F | 90°F 1978 | 43°F 1974 | 8% |
| May 19 | 72°F | 53°F | 91°F 1978 | 42°F 1950 | 8% |
| May 20 | 72°F | 53°F | 91°F 1988 | 44°F 1945 | 8% |
| May 21 | 72°F | 53°F | 96°F 2000 | 44°F 1948 | 7% |
| May 22 | 72°F | 53°F | 87°F 1954 | 44°F 2002 | 7% |
| May 23 | 73°F | 53°F | 91°F 1982 | 45°F 1945 | 7% |
| May 24 | 73°F | 53°F | 96°F 1982 | 45°F 1945 | 7% |
| May 25 | 73°F | 54°F | 93°F 1951 | 44°F 1948 | 7% |
| May 26 | 73°F | 54°F | 89°F 1974 | 42°F 1953 | 7% |
| May 27 | 73°F | 54°F | 97°F 1984 | 45°F 1956 | 6% |
| May 28 | 73°F | 54°F | 93°F 1975 | 45°F 1959 | 6% |
| May 29 | 73°F | 54°F | 98°F 1950 | 45°F 1946 | 6% |
| May 30 | 74°F | 54°F | 99°F 2001 | 44°F 1974 | 6% |
| May 31 | 74°F | 54°F | 93°F 2001 | 45°F 1955 | 6% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- May 1
- sunrise 6:13 AM, sunset 7:58 PM
- May 31
- sunrise 5:49 AM, sunset 8:23 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00023244 (Moffett Federal Airfield), public domain. Records: NOAA GHCN-Daily, station USW00023244, 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.