Eureka weather in August: Eureka, California: normal highs, lows, rain and records for August
Eureka in August has a normal high of 64°F and a normal low of 53°F, a daily mean of 59°F, holding near 64°F all month. Measurable precipitation falls on 4 days in a normal August, 0.18 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 18°C and low of 12°C, 5 mm of precipitation in August.
- 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 August?
The normal high is 64°F and the normal low 53°F, for a daily mean of 58.5°F. August is 0.8°F warmer than July and 1.3°F warmer than September. August is the warmest month of the year in Eureka and the 11th wettest. From one year to the next August's mean temperature typically moves about 1.6°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 57°F and 60°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 12%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 64°F | 53°F | 11% | 1% |
| August 8 | 64°F | 53°F | 11% | 1% |
| August 15 | 64°F | 53°F | 11% | 1% |
| August 22 | 64°F | 53°F | 11% | 2% |
| August 31 | 64°F | 52°F | 12% | 3% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 25, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 64°F | 53°F | 11% | 1% | 14 h 20 min |
| August 2 | 64°F | 53°F | 11% | 1% | 14 h 20 min |
| August 3 | 64°F | 53°F | 11% | 1% | 14 h 20 min |
| August 4 | 64°F | 53°F | 11% | 1% | 14 h 20 min |
| August 5 | 64°F | 53°F | 11% | 1% | 14 h 10 min |
| August 6 | 64°F | 53°F | 11% | 1% | 14 h 10 min |
| August 7 | 64°F | 53°F | 11% | 1% | 14 h 10 min |
| August 8 | 64°F | 53°F | 11% | 1% | 14 h 10 min |
| August 9 | 64°F | 53°F | 11% | 1% | 14 h |
| August 10 | 64°F | 53°F | 11% | 1% | 14 h |
| August 11 | 64°F | 53°F | 11% | 1% | 14 h |
| August 12 | 64°F | 53°F | 11% | 1% | 14 h |
| August 13 | 64°F | 53°F | 11% | 1% | 14 h |
| August 14 | 64°F | 53°F | 11% | 1% | 13 h 50 min |
| August 15 | 64°F | 53°F | 11% | 1% | 13 h 50 min |
| August 16 | 64°F | 53°F | 11% | 1% | 13 h 50 min |
| August 17 | 64°F | 53°F | 11% | 2% | 13 h 50 min |
| August 18 | 64°F | 53°F | 11% | 2% | 13 h 40 min |
| August 19 | 64°F | 53°F | 11% | 2% | 13 h 40 min |
| August 20 | 64°F | 53°F | 11% | 2% | 13 h 40 min |
| August 21 | 64°F | 53°F | 11% | 2% | 13 h 40 min |
| August 22 | 64°F | 53°F | 11% | 2% | 13 h 30 min |
| August 23 | 64°F | 53°F | 11% | 2% | 13 h 30 min |
| August 24 | 64°F | 53°F | 11% | 2% | 13 h 30 min |
| August 25 | 64°F | 53°F | 11% | 2% | 13 h 30 min |
| August 26 | 64°F | 53°F | 12% | 2% | 13 h 20 min |
| August 27 | 64°F | 53°F | 12% | 2% | 13 h 20 min |
| August 28 | 64°F | 52°F | 12% | 3% | 13 h 20 min |
| August 29 | 64°F | 52°F | 12% | 3% | 13 h 20 min |
| August 30 | 64°F | 52°F | 12% | 3% | 13 h 10 min |
| August 31 | 64°F | 52°F | 12% | 3% | 13 h 10 min |
- Normal high
- 64°FAugust average
- Normal low
- 53°FAugust average
- Precipitation
- 0.18 inmonth total
- Days with precipitation
- 40.01 inch or more
- Daylight
- 14 h 20 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 3
- Sunshine
- 77%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 August?
On a given August day the chance of 0.01 inch or more is 11% on average, highest around August 31 (12%). In all, 0.18 in falls on 4 days of a normal August.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024213.
What are the records for August in Eureka?
The warmest August temperature on Eureka's official record (since 1886) is 82°F, on August 30, 1968; the coldest is 44°F, on August 16, 1935. The wettest August brought 3.42 in (1983).
The August mean against the 1991-2020 normal of 58.5°F: 2021 57.5°F (−1.0), 2022 60.2°F (+1.7), 2023 60.5°F (+2.0), 2024 59.4°F (+0.9), 2025 59.6°F (+1.1), 2026 59.1°F (+0.6). 5 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 57.5°F | −1.0°F | 0.03 in |
| 2022 | 60.2°F | +1.7°F | 0.11 in |
| 2023 | 60.5°F | +2.0°F | 0.11 in |
| 2024 | 59.4°F | +0.9°F | 1.47 in |
| 2025 | 59.6°F | +1.1°F | 0.06 in |
| 2026 | 59.1°F | +0.6°F | 0.07 in |
Source: records: ACIS, NWS threaded record EKAthr; recent months: ACIS, station USW00024213. Records and recent months use complete months only.
How does August in Eureka compare across California?
Across the 219 places PlainClimate covers in California, August normal highs run from 63°F in Bodega to 109°F in Needles; Eureka's is 64°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.