Eureka weather in October: Eureka, California: normal highs, lows, rain and records for October
Eureka in October has a normal high of 62°F and a normal low of 47°F, a daily mean of 54°F, falling from 63°F on the 1st to 60°F by the 31st. Measurable precipitation falls on 9 days in a normal October, 2.31 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 17°C and low of 8°C, 59 mm of precipitation in October.
- NOAA stationEureka Weather Office Woodley Island
- Station IDUSW00024213
- Location40.81°N 124.16°W
- Elevation20 ft (6 m)
- From the centerunder 1 mile
- Population25,412
- Jan 55° 41°
- Feb 55° 41°
- Mar 56° 42°
- Apr 57° 44°
- May 60° 48°
- Jun 62° 50°
- Jul 63° 52°
- Aug 64° 53°
- Sep 64° 51°
- Oct 62° 47°
- Nov 58° 43°
- Dec 55° 40°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Eureka in October?
The normal high is 62°F and the normal low 47°F, for a daily mean of 54.3°F. October is 2.9°F cooler than September and 3.8°F warmer than November. October is the 5th warmest month of the year in Eureka and the 7th wettest. Across the month the normal high falls 3°F, from 63°F on October 1 to 60°F on October 31. From one year to the next October's mean temperature typically moves about 1.8°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 53°F and 56°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 37%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 63°F | 49°F | 22% | 10% |
| October 8 | 63°F | 48°F | 24% | 12% |
| October 15 | 62°F | 47°F | 27% | 15% |
| October 22 | 61°F | 46°F | 31% | 18% |
| October 31 | 60°F | 45°F | 37% | 22% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 63°F | 49°F | 22% | 10% | 11 h 50 min |
| October 2 | 63°F | 48°F | 22% | 10% | 11 h 50 min |
| October 3 | 63°F | 48°F | 22% | 11% | 11 h 40 min |
| October 4 | 63°F | 48°F | 23% | 11% | 11 h 40 min |
| October 5 | 63°F | 48°F | 23% | 11% | 11 h 40 min |
| October 6 | 63°F | 48°F | 23% | 11% | 11 h 40 min |
| October 7 | 63°F | 48°F | 24% | 12% | 11 h 30 min |
| October 8 | 63°F | 48°F | 24% | 12% | 11 h 30 min |
| October 9 | 63°F | 48°F | 24% | 12% | 11 h 30 min |
| October 10 | 63°F | 47°F | 25% | 13% | 11 h 20 min |
| October 11 | 63°F | 47°F | 25% | 13% | 11 h 20 min |
| October 12 | 62°F | 47°F | 26% | 13% | 11 h 20 min |
| October 13 | 62°F | 47°F | 26% | 14% | 11 h 20 min |
| October 14 | 62°F | 47°F | 26% | 14% | 11 h 10 min |
| October 15 | 62°F | 47°F | 27% | 15% | 11 h 10 min |
| October 16 | 62°F | 47°F | 27% | 15% | 11 h 10 min |
| October 17 | 62°F | 47°F | 28% | 15% | 11 h 10 min |
| October 18 | 62°F | 47°F | 29% | 16% | 11 h |
| October 19 | 62°F | 46°F | 29% | 16% | 11 h |
| October 20 | 62°F | 46°F | 30% | 17% | 11 h |
| October 21 | 61°F | 46°F | 30% | 17% | 11 h |
| October 22 | 61°F | 46°F | 31% | 18% | 10 h 50 min |
| October 23 | 61°F | 46°F | 32% | 18% | 10 h 50 min |
| October 24 | 61°F | 46°F | 32% | 19% | 10 h 50 min |
| October 25 | 61°F | 46°F | 33% | 19% | 10 h 50 min |
| October 26 | 61°F | 46°F | 34% | 20% | 10 h 40 min |
| October 27 | 61°F | 46°F | 34% | 20% | 10 h 40 min |
| October 28 | 61°F | 46°F | 35% | 21% | 10 h 40 min |
| October 29 | 60°F | 45°F | 36% | 21% | 10 h 40 min |
| October 30 | 60°F | 45°F | 36% | 22% | 10 h 30 min |
| October 31 | 60°F | 45°F | 37% | 22% | 10 h 30 min |
- Normal high
- 62°FOctober average
- Normal low
- 47°FOctober average
- Precipitation
- 2.31 inmonth total
- Days with precipitation
- 90.01 inch or more
- Daylight
- 11 h 50 min to 10 h 30 minOctober 1 to October 31
- Days at 70°F or more
- 3
- Sunshine
- 76%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024213; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Eureka in October?
On a given October day the chance of 0.01 inch or more is 28% on average, highest around October 31 (37%). In all, 2.31 in falls on 9 days of a normal October, 1 of them with an inch or more.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024213.
What are the records for October in Eureka?
The warmest October temperature on Eureka's official record (since 1886) is 87°F, on October 26, 1993; the coldest is 32°F, on October 29, 1971. The wettest October brought 13.04 in (1950).
The October mean against the 1991-2020 normal of 54.3°F: 2021 54.0°F (−0.3), 2022 53.9°F (−0.4), 2023 55.2°F (+0.9), 2024 55.1°F (+0.8), 2025 55.2°F (+0.9). 3 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 54.0°F | −0.3°F | 4.02 in |
| 2022 | 53.9°F | −0.4°F | 0.14 in |
| 2023 | 55.2°F | +0.9°F | 2.09 in |
| 2024 | 55.1°F | +0.8°F | 2.45 in |
| 2025 | 55.2°F | +0.9°F | 3.34 in |
Source: records: ACIS, NWS threaded record EKAthr; recent months: ACIS, station USW00024213. Records and recent months use complete months only.
How does October in Eureka compare across California?
Across the 219 places PlainClimate covers in California, October normal highs run from 58°F in Tahoma to 93°F in Brawley; Eureka's is 62°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.