Average annual temperature is 9.3 °C
Absolute maximum temperature: 36.6 °C
Absolute minimum temperature: -27.3 °C
Number of sunny days: 195 days
Number of rainy days: 136 days
Number of snow days: 34 days
Look at detailed online map of Hyannis
* Weather data for Hyannis 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) | 11.0 | 12.1 | 18.3 | 29.0 | 28.0 | 30.5 | 34.6 | 36.6 | 34.4 | 28.1 | 22.0 | 15.3 |
| Average daytime temperature (°C) | -0.9 | 4.1 | 7.4 | 15.3 | 21.5 | 25.3 | 28.3 | 29.1 | 25.8 | 15.9 | 10.5 | 5.6 |
| Average temperature (°C) | -4.7 | -2.8 | -0.4 | 7.3 | 15.2 | 19.3 | 21.7 | 22.4 | 18.9 | 9.3 | 4.1 | 0.3 |
| Average night temperature (°C) | -8.0 | -7.0 | -5.2 | 1.1 | 9.8 | 13.9 | 15.7 | 17.0 | 13.0 | 4.0 | -0.1 | -3.0 |
| Absolute minimum temperature (°C) | -23.1 | -27.3 | -11.9 | -8.4 | 0.6 | 9.7 | 11.0 | 11.9 | 6.9 | -9.9 | -10.5 | -8.6 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 13.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.8 | 12.5 | 11.1 | 9.8 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.7 | 8.2 | 8.6 | 10.1 | 10.6 | 12.1 | 12.5 | 11.7 | 10.7 | 8.0 | 7.6 | 5.7 |
| Precipitation (mm) | 55 | 15 | 32 | 19 | 107 | 77 | 30 | 39 | 17 | 46 | 21 | 21 |
| Sunny days | 17 | 19 | 17 | 13 | 6 | 11 | 11 | 15 | 23 | 19 | 22 | 22 |
| Rainy days | 2 | 4 | 5 | 14 | 25 | 19 | 20 | 16 | 7 | 10 | 7 | 7 |
| Snow days | 12 | 5 | 9 | 3 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 2 |
The best time to visit Hyannis during the most sunny months:
The largest precipitation sum in Hyannis is at