Prosser Weather in January
Average highs run from 38°F on January 1 to 43°F on January 31, and lows from 26°F to 27°F. Normal precipitation for the month is 1.24 in over about 8 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
- 40°F
- Average low
- 27°F
- Precipitation
- 1.24 in
- Record high
- 70°FJan 1, 1918
- Record low
- -26°FJan 21, 1930
- Chance of a freeze
- 100%
- Daylight
- 8 h 42 min to 9 h 40 min
- Cloud cover
- 75%
- Humidity
- 84%
- Dew point
- 28°F
- Wind
- 9.6 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 | 38°F | 26°F | 70°F 1918 | -7°F 1979 | 27% |
| Jan 2 | 38°F | 26°F | 63°F 1913 | -5°F 1979 | 27% |
| Jan 3 | 38°F | 26°F | 59°F 1903 | 1°F 1959 | 27% |
| Jan 4 | 38°F | 26°F | 63°F 1989 | -16°F 1899 | 27% |
| Jan 5 | 39°F | 26°F | 60°F 1994 | -9°F 1899 | 27% |
| Jan 6 | 39°F | 26°F | 62°F 1914 | -8°F 1982 | 27% |
| Jan 7 | 39°F | 26°F | 63°F 1902 | -7°F 1974 | 27% |
| Jan 8 | 39°F | 27°F | 66°F 1983 | -16°F 1912 | 27% |
| Jan 9 | 39°F | 27°F | 62°F 2002 | -18°F 1909 | 27% |
| Jan 10 | 39°F | 27°F | 60°F 1953 | -10°F 1909 | 27% |
| Jan 11 | 39°F | 27°F | 63°F 1983 | -8°F 1909 | 27% |
| Jan 12 | 39°F | 27°F | 62°F 1945 | -24°F 1909 | 27% |
| Jan 13 | 40°F | 27°F | 60°F 1991 | -7°F 1909 | 27% |
| Jan 14 | 40°F | 27°F | 64°F 1967 | -21°F 1909 | 27% |
| Jan 15 | 40°F | 27°F | 61°F 1961 | -7°F 1907 | 26% |
| Jan 16 | 40°F | 27°F | 66°F 1976 | -6°F 1950 | 26% |
| Jan 17 | 40°F | 27°F | 62°F 1919 | -16°F 1930 | 26% |
| Jan 18 | 40°F | 27°F | 61°F 1920 | -7°F 1930 | 26% |
| Jan 19 | 40°F | 27°F | 67°F 1977 | -16°F 1916 | 26% |
| Jan 20 | 41°F | 27°F | 64°F 1968 | -20°F 1930 | 26% |
| Jan 21 | 41°F | 27°F | 64°F 1968 | -26°F 1930 | 25% |
| Jan 22 | 41°F | 27°F | 67°F 1968 | -22°F 1930 | 25% |
| Jan 23 | 41°F | 27°F | 59°F 1916 | -14°F 1930 | 25% |
| Jan 24 | 41°F | 27°F | 66°F 1953 | -10°F 1930 | 25% |
| Jan 25 | 42°F | 27°F | 62°F 1984 | -10°F 1930 | 25% |
| Jan 26 | 42°F | 27°F | 60°F 1962 | -20°F 1957 | 24% |
| Jan 27 | 42°F | 27°F | 65°F 2003 | -18°F 1957 | 24% |
| Jan 28 | 42°F | 27°F | 63°F 1931 | -14°F 1957 | 24% |
| Jan 29 | 42°F | 27°F | 61°F 1899 | -13°F 1950 | 24% |
| Jan 30 | 43°F | 27°F | 64°F 1971 | -14°F 1929 | 24% |
| Jan 31 | 43°F | 27°F | 68°F 1971 | -17°F 1950 | 23% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PST).
- January 1
- sunrise 7:42 AM, sunset 4:24 PM
- January 31
- sunrise 7:23 AM, sunset 5:03 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00456768 (Prosser), public domain. Records: NOAA GHCN-Daily, station USC00458207, 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.