Sunnyvale Weather in January
Average highs run from 58°F on January 1 to 60°F on January 31, and lows from 42°F to 43°F. Normal precipitation for the month is 2.49 in over about 11 wet days.
January day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
January at a glance
- Average high
- 59°F
- Average low
- 42°F
- Precipitation
- 2.49 in
- Record high
- 76°FJan 23, 1948
- Record low
- 21°FJan 5, 1949
- Chance of a freeze
- 39%
- Daylight
- 9 h 38 min to 10 h 20 min
- Cloud cover
- 55%
- Humidity
- 84%
- Dew point
- 42°F
- Wind
- 6.5 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 |
|---|---|---|---|---|---|
| Jan 1 | 58°F | 42°F | 70°F 2012 | 30°F 1952 | 35% |
| Jan 2 | 58°F | 42°F | 66°F 1999 | 28°F 1952 | 35% |
| Jan 3 | 58°F | 42°F | 64°F 2026 | 29°F 1950 | 35% |
| Jan 4 | 58°F | 42°F | 69°F 2012 | 27°F 1947 | 35% |
| Jan 5 | 58°F | 42°F | 67°F 1986 | 21°F 1949 | 35% |
| Jan 6 | 58°F | 42°F | 70°F 1948 | 22°F 1950 | 35% |
| Jan 7 | 59°F | 42°F | 71°F 2012 | 27°F 1950 | 35% |
| Jan 8 | 59°F | 42°F | 74°F 1962 | 29°F 1955 | 35% |
| Jan 9 | 59°F | 42°F | 71°F 1962 | 31°F 1947 | 35% |
| Jan 10 | 59°F | 42°F | 69°F 1953 | 26°F 1949 | 35% |
| Jan 11 | 59°F | 42°F | 71°F 2009 | 23°F 1949 | 34% |
| Jan 12 | 59°F | 42°F | 72°F 2009 | 28°F 1949 | 34% |
| Jan 13 | 59°F | 42°F | 71°F 2009 | 25°F 1949 | 34% |
| Jan 14 | 59°F | 42°F | 74°F 2014 | 28°F 2007 | 35% |
| Jan 15 | 59°F | 42°F | 72°F 2009 | 27°F 2007 | 35% |
| Jan 16 | 59°F | 42°F | 73°F 2014 | 29°F 1947 | 35% |
| Jan 17 | 59°F | 42°F | 72°F 1986 | 29°F 1946 | 35% |
| Jan 18 | 59°F | 42°F | 71°F 1981 | 27°F 1947 | 35% |
| Jan 19 | 59°F | 43°F | 71°F 2009 | 31°F 1948 | 35% |
| Jan 20 | 59°F | 43°F | 71°F 2014 | 30°F 1963 | 35% |
| Jan 21 | 59°F | 43°F | 70°F 1950 | 30°F 1966 | 35% |
| Jan 22 | 59°F | 43°F | 74°F 2014 | 30°F 1962 | 36% |
| Jan 23 | 59°F | 43°F | 76°F 1948 | 33°F 1947 | 36% |
| Jan 24 | 59°F | 43°F | 76°F 1948 | 31°F 1949 | 36% |
| Jan 25 | 60°F | 43°F | 72°F 2014 | 30°F 1949 | 36% |
| Jan 26 | 60°F | 43°F | 70°F 2014 | 25°F 1949 | 36% |
| Jan 27 | 60°F | 43°F | 71°F 1988 | 27°F 1949 | 36% |
| Jan 28 | 60°F | 43°F | 69°F 1984 | 29°F 1948 | 36% |
| Jan 29 | 60°F | 43°F | 68°F 1962 | 28°F 1949 | 37% |
| Jan 30 | 60°F | 43°F | 73°F 1976 | 29°F 1949 | 37% |
| Jan 31 | 60°F | 43°F | 74°F 1976 | 28°F 1946 | 37% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PST).
- January 1
- sunrise 7:23 AM, sunset 5:01 PM
- January 31
- sunrise 7:12 AM, sunset 5:32 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.