Average annual temperature is 18.1 °C
Absolute maximum temperature: 36.8 °C
Absolute minimum temperature: -3.2 °C
Number of sunny days: 179 days
Number of rainy days: 186 days
Look at detailed online map of Eureka
* Weather data for Eureka United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 21.5 | 26.1 | 28.0 | 29.3 | 32.9 | 34.0 | 34.8 | 36.8 | 33.2 | 29.3 | 26.7 | 22.5 |
| Average daytime temperature (°C) | 15.2 | 18.8 | 20.6 | 23.9 | 25.2 | 28.8 | 32.7 | 33.1 | 28.2 | 23.5 | 18.0 | 14.8 |
| Average temperature (°C) | 10.1 | 13.4 | 14.4 | 17.7 | 19.9 | 23.5 | 27.3 | 27.4 | 22.7 | 17.9 | 12.4 | 9.7 |
| Average night temperature (°C) | 6.2 | 9.2 | 9.1 | 12.2 | 15.2 | 18.9 | 22.7 | 22.6 | 18.0 | 13.2 | 8.1 | 5.6 |
| Absolute minimum temperature (°C) | -3.2 | -1.3 | -0.8 | 5.5 | 8.3 | 14.7 | 20.1 | 20.4 | 14.2 | 7.3 | -0.7 | -2.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.4 | 14.1 | 13.4 | 12.4 | 11.3 | 10.4 | 10.0 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 6.0 | 7.5 | 8.5 | 9.5 | 9.5 | 10.9 | 11.6 | 11.2 | 10.6 | 8.9 | 7.4 | 6.4 |
| Precipitation (mm) | 145 | 83 | 107 | 125 | 89 | 118 | 60 | 121 | 40 | 58 | 39 | 104 |
| Sunny days | 16 | 16 | 18 | 12 | 11 | 11 | 7 | 8 | 18 | 23 | 18 | 21 |
| Rainy days | 15 | 12 | 13 | 18 | 20 | 19 | 24 | 23 | 12 | 8 | 12 | 10 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Eureka during the most sunny months:
The largest precipitation sum in Eureka is at