Eureka Weather in January
Average highs run from 30°F on January 1 to 35°F on January 31, and lows from 19°F to 20°F. Normal precipitation for the month is 0.92 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
- 32°F
- Average low
- 19°F
- Precipitation
- 0.92 in
- Snowfall
- 8.5 in
- Record high
- 56°FJan 27, 1934
- Record low
- -38°FJan 30, 1950
- Chance of a freeze
- 100%
- Daylight
- 8 h 20 min to 9 h 26 min
- Cloud cover
- 67%
- Humidity
- 98%
- Dew point
- 13°F
- Wind
- 4.0 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Jan 1 | 30°F | 19°F | 53°F 1939 | -37°F 1979 | 36% | 23% |
| Jan 2 | 30°F | 19°F | 52°F 1939 | -24°F 1979 | 36% | 23% |
| Jan 3 | 30°F | 19°F | 48°F 1909 | -27°F 1979 | 36% | 23% |
| Jan 4 | 30°F | 19°F | 50°F 2012 | -24°F 1979 | 35% | 23% |
| Jan 5 | 30°F | 19°F | 52°F 2012 | -30°F 1979 | 35% | 23% |
| Jan 6 | 31°F | 19°F | 53°F 1903 | -28°F 1979 | 35% | 22% |
| Jan 7 | 31°F | 19°F | 55°F 1902 | -26°F 1937 | 35% | 22% |
| Jan 8 | 31°F | 19°F | 47°F 1945 | -27°F 1979 | 35% | 22% |
| Jan 9 | 31°F | 19°F | 50°F 1953 | -28°F 1979 | 34% | 22% |
| Jan 10 | 31°F | 19°F | 48°F 1923 | -22°F 1909 | 34% | 22% |
| Jan 11 | 31°F | 19°F | 48°F 1932 | -34°F 1909 | 34% | 21% |
| Jan 12 | 31°F | 19°F | 50°F 1945 | -29°F 2024 | 34% | 21% |
| Jan 13 | 32°F | 19°F | 49°F 1900 | -33°F 2024 | 33% | 21% |
| Jan 14 | 32°F | 19°F | 48°F 1921 | -26°F 1972 | 33% | 21% |
| Jan 15 | 32°F | 19°F | 48°F 1921 | -28°F 2024 | 33% | 20% |
| Jan 16 | 32°F | 19°F | 48°F 1974 | -21°F 1916 | 33% | 20% |
| Jan 17 | 32°F | 19°F | 50°F 1919 | -23°F 1930 | 32% | 20% |
| Jan 18 | 33°F | 19°F | 54°F 1919 | -26°F 1943 | 32% | 19% |
| Jan 19 | 33°F | 19°F | 52°F 1919 | -19°F 1935 | 32% | 19% |
| Jan 20 | 33°F | 20°F | 48°F 1944 | -27°F 1937 | 31% | 19% |
| Jan 21 | 33°F | 20°F | 45°F 1903 | -26°F 1962 | 31% | 18% |
| Jan 22 | 33°F | 20°F | 49°F 1910 | -19°F 1962 | 31% | 18% |
| Jan 23 | 34°F | 20°F | 52°F 1931 | -23°F 1929 | 31% | 18% |
| Jan 24 | 34°F | 20°F | 53°F 1953 | -16°F 1930 | 30% | 17% |
| Jan 25 | 34°F | 20°F | 51°F 1935 | -24°F 1950 | 30% | 17% |
| Jan 26 | 34°F | 20°F | 52°F 1899 | -28°F 1957 | 30% | 17% |
| Jan 27 | 34°F | 20°F | 56°F 1934 | -26°F 1980 | 30% | 17% |
| Jan 28 | 35°F | 20°F | 48°F 1952 | -28°F 1980 | 29% | 16% |
| Jan 29 | 35°F | 20°F | 47°F 1971 | -28°F 1950 | 29% | 16% |
| Jan 30 | 35°F | 20°F | 51°F 1971 | -38°F 1950 | 29% | 16% |
| Jan 31 | 35°F | 20°F | 50°F 1971 | -38°F 1950 | 29% | 16% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- January 1
- sunrise 8:34 AM, sunset 4:54 PM
- January 31
- sunrise 8:11 AM, sunset 5:37 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00242827 (Eureka RS), public domain. Records: NOAA GHCN-Daily, station USC00244558, 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.