Eureka Weather in October
Average highs run from 68°F on October 1 to 55°F on October 31, and lows from 39°F to 29°F. Normal precipitation for the month is 0.83 in over about 4 wet days.
October day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
October at a glance
- Average high
- 62°F
- Average low
- 33°F
- Precipitation
- 0.83 in
- Snowfall
- 0.6 in
- Record high
- 89°FOct 1, 2010
- Record low
- -9°FOct 30, 2019
- Chance of a freeze
- 100%
- Daylight
- 11 h 46 min to 10 h 32 min
- Cloud cover
- 41%
- Humidity
- 42%
- Dew point
- 22°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 |
|---|---|---|---|---|---|---|
| Oct 1 | 68°F | 39°F | 89°F 2010 | 18°F 2009 | 11% | 1% |
| Oct 2 | 68°F | 38°F | 87°F 2010 | 16°F 2019 | 11% | 1% |
| Oct 3 | 67°F | 38°F | 86°F 2024 | 24°F 1999 | 11% | 1% |
| Oct 4 | 67°F | 37°F | 84°F 2024 | 23°F 2005 | 11% | 1% |
| Oct 5 | 66°F | 37°F | 82°F 2020 | 17°F 2005 | 11% | 1% |
| Oct 6 | 66°F | 37°F | 84°F 2020 | 17°F 2009 | 11% | 1% |
| Oct 7 | 65°F | 36°F | 82°F 2020 | 18°F 2009 | 11% | 1% |
| Oct 8 | 65°F | 36°F | 81°F 2003 | 22°F 2017 | 11% | 1% |
| Oct 9 | 65°F | 36°F | 84°F 2003 | 17°F 2017 | 11% | 1% |
| Oct 10 | 64°F | 35°F | 85°F 2015 | 5°F 2019 | 11% | 1% |
| Oct 11 | 64°F | 35°F | 81°F 1999 | 9°F 2019 | 11% | 1% |
| Oct 12 | 63°F | 34°F | 83°F 2015 | 12°F 2019 | 10% | 1% |
| Oct 13 | 63°F | 34°F | 83°F 2015 | 10°F 2008 | 11% | 1% |
| Oct 14 | 63°F | 34°F | 82°F 2015 | 13°F 2018 | 11% | 1% |
| Oct 15 | 62°F | 33°F | 82°F 2015 | 10°F 2018 | 11% | 1% |
| Oct 16 | 62°F | 33°F | 79°F 2023 | 9°F 1999 | 11% | 1% |
| Oct 17 | 61°F | 33°F | 81°F 2003 | 9°F 1999 | 11% | 1% |
| Oct 18 | 61°F | 33°F | 80°F 2003 | 14°F 2019 | 11% | 1% |
| Oct 19 | 61°F | 32°F | 79°F 2023 | 18°F 1998 | 11% | 1% |
| Oct 20 | 60°F | 32°F | 81°F 2003 | 11°F 2019 | 11% | 2% |
| Oct 21 | 60°F | 32°F | 83°F 2003 | 11°F 2007 | 11% | 2% |
| Oct 22 | 59°F | 31°F | 83°F 2003 | 14°F 2008 | 11% | 2% |
| Oct 23 | 59°F | 31°F | 75°F 2011 | 15°F 2020 | 11% | 2% |
| Oct 24 | 58°F | 31°F | 78°F 2007 | 13°F 2019 | 11% | 2% |
| Oct 25 | 58°F | 30°F | 76°F 2007 | 11°F 1997 | 12% | 2% |
| Oct 26 | 58°F | 30°F | 75°F 2008 | -1°F 2020 | 12% | 2% |
| Oct 27 | 57°F | 30°F | 79°F 2008 | 7°F 2019 | 12% | 2% |
| Oct 28 | 57°F | 30°F | 79°F 2008 | 1°F 2019 | 12% | 2% |
| Oct 29 | 56°F | 29°F | 74°F 2017 | -2°F 2019 | 12% | 2% |
| Oct 30 | 56°F | 29°F | 74°F 2008 | -9°F 2019 | 12% | 3% |
| Oct 31 | 55°F | 29°F | 71°F 1999 | 2°F 2002 | 12% | 3% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- October 1
- sunrise 6:40 AM, sunset 6:26 PM
- October 31
- sunrise 7:11 AM, sunset 5:43 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00262708 (Eureka), public domain. Records: NOAA GHCN-Daily, station USW00003170, 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.