Average annual temperature is 13.5 °C
Absolute maximum temperature: 35.4 °C
Absolute minimum temperature: -10.7 °C
Number of sunny days: 188 days
Number of rainy days: 175 days
Number of snow days: 2 days
Look at detailed online map of Romona
* Weather data for Romona 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) | 17.9 | 21.1 | 21.9 | 27.8 | 30.7 | 33.5 | 35.4 | 35.1 | 32.2 | 30.7 | 25.1 | 16.6 |
| Average daytime temperature (°C) | 7.1 | 11.0 | 12.0 | 19.1 | 24.4 | 28.5 | 30.4 | 28.9 | 26.6 | 20.1 | 13.1 | 9.2 |
| Average temperature (°C) | 3.1 | 4.8 | 5.9 | 12.0 | 17.8 | 22.0 | 24.5 | 23.3 | 20.6 | 14.5 | 7.5 | 4.9 |
| Average night temperature (°C) | 0.1 | 0.2 | 1.4 | 6.3 | 11.7 | 16.5 | 19.4 | 18.5 | 15.7 | 10.3 | 3.3 | 1.9 |
| Absolute minimum temperature (°C) | -9.3 | -10.7 | -7.5 | -1.0 | 3.7 | 11.4 | 16.0 | 13.0 | 11.9 | -3.1 | -7.8 | -6.9 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.5 | 11.2 | 10.0 | 9.5 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.0 | 7.3 | 6.5 | 9.2 | 11.1 | 11.5 | 12.0 | 11.0 | 10.3 | 7.5 | 8.0 | 4.7 |
| Precipitation (mm) | 144 | 62 | 215 | 85 | 40 | 63 | 84 | 105 | 21 | 66 | 23 | 53 |
| Sunny days | 10 | 17 | 15 | 15 | 17 | 18 | 6 | 16 | 19 | 17 | 23 | 15 |
| Rainy days | 20 | 11 | 15 | 15 | 14 | 12 | 25 | 15 | 11 | 14 | 7 | 16 |
| Snow days | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Romona during the most sunny months:
The largest precipitation sum in Romona is at