Eureka Weather in January
Average highs run from 42°F on January 1 to 42°F on January 31, and lows from 23°F to 22°F. Normal precipitation for the month is 2.38 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
- 41°F
- Average low
- 22°F
- Precipitation
- 2.38 in
- Snowfall
- 4.4 in
- Record high
- 76°FJan 28, 2002
- Record low
- -16°FJan 5, 1999
- Chance of a freeze
- 100%
- Daylight
- 9 h 32 min to 10 h 15 min
- Cloud cover
- 64%
- Humidity
- 83%
- Dew point
- 24°F
- Wind
- 7.6 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 | 42°F | 23°F | 66°F 2005 | -6°F 2018 | 27% | 5% |
| Jan 2 | 41°F | 23°F | 71°F 2004 | -10°F 2001 | 27% | 5% |
| Jan 3 | 41°F | 23°F | 70°F 2023 | -5°F 2001 | 27% | 5% |
| Jan 4 | 41°F | 23°F | 63°F 1993 | -8°F 1999 | 27% | 5% |
| Jan 5 | 41°F | 23°F | 66°F 2012 | -16°F 1999 | 27% | 5% |
| Jan 6 | 41°F | 22°F | 74°F 2008 | -11°F 2014 | 27% | 5% |
| Jan 7 | 41°F | 22°F | 74°F 2008 | -11°F 2014 | 27% | 6% |
| Jan 8 | 41°F | 22°F | 72°F 2006 | -1°F 1988 | 27% | 6% |
| Jan 9 | 41°F | 22°F | 67°F 2026 | -1°F 2010 | 27% | 6% |
| Jan 10 | 41°F | 22°F | 67°F 2017 | -7°F 2010 | 27% | 6% |
| Jan 11 | 41°F | 22°F | 71°F 2017 | 12°F 2003 | 27% | 6% |
| Jan 12 | 41°F | 22°F | 70°F 2005 | 7°F 2011 | 27% | 6% |
| Jan 13 | 41°F | 22°F | 64°F 2026 | 0°F 2024 | 27% | 6% |
| Jan 14 | 41°F | 22°F | 65°F 2016 | -8°F 2024 | 27% | 6% |
| Jan 15 | 41°F | 22°F | 69°F 1990 | -4°F 2024 | 27% | 6% |
| Jan 16 | 41°F | 22°F | 72°F 1990 | -5°F 2024 | 27% | 6% |
| Jan 17 | 41°F | 22°F | 67°F 2012 | -1°F 2005 | 27% | 6% |
| Jan 18 | 41°F | 22°F | 58°F 1989 | -11°F 1994 | 26% | 6% |
| Jan 19 | 41°F | 22°F | 68°F 2006 | -11°F 1994 | 26% | 6% |
| Jan 20 | 41°F | 22°F | 63°F 2006 | 0°F 2024 | 26% | 6% |
| Jan 21 | 41°F | 22°F | 70°F 2017 | -9°F 2011 | 26% | 6% |
| Jan 22 | 41°F | 22°F | 61°F 1989 | 6°F 2003 | 26% | 6% |
| Jan 23 | 41°F | 22°F | 71°F 2002 | -8°F 2003 | 26% | 5% |
| Jan 24 | 41°F | 22°F | 63°F 1989 | -8°F 2003 | 26% | 5% |
| Jan 25 | 41°F | 22°F | 65°F 2018 | 0°F 2026 | 26% | 5% |
| Jan 26 | 41°F | 22°F | 64°F 2002 | -13°F 2026 | 26% | 5% |
| Jan 27 | 42°F | 22°F | 68°F 2002 | 6°F 2003 | 26% | 5% |
| Jan 28 | 42°F | 22°F | 76°F 2002 | 2°F 2004 | 26% | 5% |
| Jan 29 | 42°F | 22°F | 72°F 2008 | 1°F 2014 | 26% | 5% |
| Jan 30 | 42°F | 22°F | 67°F 2012 | -4°F 2019 | 26% | 5% |
| Jan 31 | 42°F | 22°F | 74°F 1989 | 0°F 2026 | 26% | 5% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- January 1
- sunrise 7:20 AM, sunset 4:52 PM
- January 31
- sunrise 7:09 AM, sunset 5:24 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00003966 (St Louis Sprt Of S L AP), public domain. Records: NOAA GHCN-Daily, station USW00003966, 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.