Average annual temperature is 21.9 °C
Absolute maximum temperature: 38.9 °C
Absolute minimum temperature: -0.5 °C
Number of sunny days: 152 days
Number of rainy days: 213 days
Look at detailed online map of Morriston
* Weather data for Morriston 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) | 27.6 | 28.4 | 30.0 | 33.3 | 34.5 | 35.2 | 36.0 | 38.9 | 34.4 | 31.7 | 30.0 | 26.5 |
| Average daytime temperature (°C) | 21.1 | 24.8 | 25.9 | 29.4 | 30.1 | 31.7 | 32.9 | 34.8 | 32.0 | 27.6 | 23.5 | 20.1 |
| Average temperature (°C) | 14.8 | 18.0 | 19.5 | 22.7 | 23.6 | 25.9 | 27.7 | 28.9 | 25.9 | 22.0 | 17.8 | 15.1 |
| Average night temperature (°C) | 10.1 | 13.4 | 14.6 | 17.2 | 18.5 | 21.7 | 23.9 | 24.4 | 21.6 | 17.5 | 13.7 | 11.7 |
| Absolute minimum temperature (°C) | -0.5 | 5.7 | 4.6 | 10.3 | 12.9 | 18.0 | 22.4 | 22.4 | 16.2 | 8.8 | 3.2 | 4.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 14.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.5 | 11.2 | 12.0 | 12.9 | 13.6 | 14.0 | 13.8 | 13.2 | 12.3 | 11.5 | 10.7 | 10.3 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 8.4 | 9.0 | 9.9 | 10.0 | 11.2 | 11.0 | 11.0 | 11.4 | 10.2 | 9.3 | 6.8 | 6.9 |
| Precipitation (mm) | 56 | 44 | 56 | 65 | 71 | 137 | 100 | 89 | 130 | 58 | 104 | 99 |
| Sunny days | 17 | 17 | 13 | 13 | 13 | 6 | 1 | 3 | 11 | 22 | 18 | 18 |
| Rainy days | 14 | 11 | 18 | 17 | 18 | 24 | 30 | 28 | 19 | 9 | 12 | 13 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Morriston is at