Gilroy Weather in January
Average highs run from 60°F on January 1 to 62°F on January 31, and lows from 37°F to 39°F. Normal precipitation for the month is 4.55 in over about 10 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
- 61°F
- Average low
- 38°F
- Precipitation
- 4.55 in
- Record high
- 80°FJan 18, 2014
- Record low
- 18°FJan 15, 1963
- Chance of a freeze
- 89%
- Daylight
- 9 h 40 min to 10 h 22 min
- Cloud cover
- 55%
- Humidity
- 80%
- Dew point
- 40°F
- Wind
- 5.8 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 | 60°F | 37°F | 75°F 2014 | 20°F 1979 | 30% |
| Jan 2 | 60°F | 37°F | 75°F 2012 | 20°F 1960 | 30% |
| Jan 3 | 60°F | 37°F | 73°F 1996 | 24°F 1961 | 30% |
| Jan 4 | 60°F | 37°F | 72°F 2014 | 23°F 1971 | 30% |
| Jan 5 | 60°F | 37°F | 72°F 2001 | 22°F 1971 | 30% |
| Jan 6 | 60°F | 37°F | 70°F 2014 | 24°F 1973 | 30% |
| Jan 7 | 60°F | 37°F | 69°F 1996 | 21°F 1973 | 30% |
| Jan 8 | 60°F | 38°F | 74°F 1962 | 26°F 1971 | 30% |
| Jan 9 | 60°F | 38°F | 78°F 1962 | 25°F 1972 | 30% |
| Jan 10 | 60°F | 38°F | 77°F 1962 | 26°F 1969 | 30% |
| Jan 11 | 60°F | 38°F | 72°F 1990 | 25°F 1963 | 30% |
| Jan 12 | 60°F | 38°F | 72°F 1959 | 20°F 1963 | 30% |
| Jan 13 | 60°F | 38°F | 73°F 2009 | 19°F 1963 | 30% |
| Jan 14 | 61°F | 38°F | 74°F 2009 | 19°F 1963 | 31% |
| Jan 15 | 61°F | 38°F | 73°F 2014 | 18°F 1963 | 31% |
| Jan 16 | 61°F | 38°F | 76°F 2014 | 23°F 1962 | 31% |
| Jan 17 | 61°F | 38°F | 77°F 2014 | 22°F 1987 | 31% |
| Jan 18 | 61°F | 38°F | 80°F 2014 | 19°F 2002 | 31% |
| Jan 19 | 61°F | 38°F | 80°F 2014 | 20°F 2012 | 31% |
| Jan 20 | 61°F | 38°F | 79°F 2014 | 22°F 1963 | 31% |
| Jan 21 | 61°F | 39°F | 75°F 1976 | 19°F 2014 | 31% |
| Jan 22 | 61°F | 39°F | 72°F 1976 | 24°F 1966 | 32% |
| Jan 23 | 61°F | 39°F | 74°F 1961 | 24°F 1966 | 32% |
| Jan 24 | 61°F | 39°F | 74°F 1968 | 25°F 1962 | 32% |
| Jan 25 | 61°F | 39°F | 77°F 2014 | 28°F 1962 | 32% |
| Jan 26 | 62°F | 39°F | 76°F 1990 | 25°F 1979 | 32% |
| Jan 27 | 62°F | 39°F | 73°F 1986 | 26°F 1979 | 32% |
| Jan 28 | 62°F | 39°F | 74°F 1988 | 24°F 1975 | 32% |
| Jan 29 | 62°F | 39°F | 76°F 1976 | 23°F 1979 | 32% |
| Jan 30 | 62°F | 39°F | 74°F 1962 | 23°F 1975 | 32% |
| Jan 31 | 62°F | 39°F | 74°F 1976 | 26°F 1972 | 33% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PST).
- January 1
- sunrise 7:20 AM, sunset 5:00 PM
- January 31
- sunrise 7:09 AM, sunset 5:31 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00043417 (Gilroy), public domain. Records: NOAA GHCN-Daily, station USC00043417, 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.