Average temperature in May is 19.1 °C
Average daytime temperature is 25.8 °C
Average night temperature is 13.4 °C
Absolute maximum temperature: 32.4 °C
Absolute minimum temperature: 4.7 °C
Number of sunny days: 15
Number of rainy days: 16
Number of snow days:
Precipitation sum: 57 mm
* Weather data for Ontario United States is based on climate observations for 2023 year
| Maggio (°C) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperature | 16.6 | 17.9 | 21.3 | 23.1 | 25.9 | 32.4 | 31.2 | 28.6 | 26.4 | 26.9 | 23.4 | 27.9 | 28.1 | 27.9 | 21.3 | 20.7 | 26.2 | 26.4 | 24.2 | 20.1 | 23.6 | 25.9 | 26.4 | 28.3 | 27.9 | 26.7 | 26.3 | 28.2 | 29.8 | 29.8 | 29 |
| Apparent max temperature | 12.2 | 13.6 | 20.7 | 20.6 | 26.1 | 33.4 | 31.7 | 29.2 | 25.3 | 29.4 | 23.5 | 29.4 | 28.7 | 30.6 | 22.3 | 20.5 | 27.3 | 27.7 | 24.7 | 21 | 24.4 | 25.9 | 26.6 | 29.5 | 27.6 | 25.8 | 25.5 | 28.3 | 30 | 32 | 30.7 |
| Mean temperature | 10.9 | 11.8 | 13.5 | 16.7 | 17 | 22.6 | 23.4 | 21.6 | 21 | 20.4 | 20 | 21.4 | 22 | 22.4 | 16.7 | 15.5 | 18.7 | 19.8 | 17.8 | 13.9 | 16.2 | 18.3 | 20.6 | 21.2 | 20.7 | 20.8 | 19.4 | 20.7 | 22.9 | 22.8 | 22.5 |
| Apparent mean temperature | 0.6 | 0.7 | 0.8 | 7.5 | 11.1 | 16.4 | 15.1 | 14.3 | 15.6 | 15.2 | 17.4 | 18.1 | 16.9 | 19.2 | 13 | 12.1 | 11.6 | 12.5 | 9.9 | 5.1 | 6 | 10.3 | 13.9 | 11.4 | 15.7 | 13.3 | 8.7 | 11.2 | 15.8 | 18.3 | 19.4 |
| Minimum temperature | 5.6 | 5.5 | 4.7 | 10.3 | 13.1 | 17 | 14.9 | 14.8 | 16 | 15.5 | 16.9 | 17 | 17.1 | 18.2 | 14.1 | 13.1 | 12.7 | 13.1 | 14.1 | 8 | 8.4 | 11.6 | 14.5 | 12.7 | 15.1 | 15.5 | 11.7 | 13.1 | 16.1 | 17.4 | 18.5 |
| Apparent min temperature | 5.9 | 7.3 | 10.6 | 13.9 | 15.9 | 22.8 | 23.5 | 21.8 | 20.6 | 20.8 | 20.3 | 22.5 | 22.5 | 23.6 | 16.6 | 14.9 | 18.5 | 19.5 | 16.1 | 12.1 | 15.3 | 17.6 | 20.2 | 20.7 | 21.2 | 19.7 | 17.1 | 19.1 | 22.7 | 23.8 | 23.6 |
| Maggio | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight duration (h) | 13.9 | 13.9 | 13.9 | 14 | 14 | 14 | 14.1 | 14.1 | 14.2 | 14.2 | 14.2 | 14.3 | 14.3 | 14.3 | 14.3 | 14.4 | 14.4 | 14.4 | 14.5 | 14.5 | 14.5 | 14.5 | 14.6 | 14.6 | 14.6 | 14.6 | 14.7 | 14.7 | 14.7 | 14.7 | 14.8 |
| Sunshine duration (h) | 12.8 | 12.8 | 12.9 | 11.5 | 8.5 | 10.3 | 12.3 | 12 | 5.2 | 8.8 | 8.1 | 10.5 | 12.8 | 9 | 0 | 3.9 | 13.3 | 13.3 | 5 | 13.4 | 13.4 | 13.4 | 12.9 | 12.8 | 12.4 | 12.5 | 13.5 | 13.5 | 12.2 | 11.5 | 7.4 |
| Precipitation (mm) | 0 | 0 | 0 | 0.1 | 2 | 0.7 | 0 | 8.5 | 0 | 1.7 | 1.7 | 8 | 0 | 1.6 | 23.4 | 1.5 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 0.1 | 3.3 | 0.4 | 0 | 0 | 1.2 | 0 | 2.5 |
| Precipitation hours | 0 | 0 | 0 | 1 | 4 | 2 | 0 | 2 | 0 | 2 | 8 | 10 | 0 | 3 | 24 | 11 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 5 | 1 | 0 | 0 | 3 | 0 | 3 |
| Wind speed (m/s) | 28.8 | 20 | 14.2 | 23.4 | 19.8 | 22.7 | 21.5 | 25 | 21 | 23.1 | 23.7 | 23.7 | 23.9 | 13.3 | 16.9 | 13.7 | 10.5 | 12.1 | 22.8 | 17.3 | 10.2 | 14.7 | 11.2 | 13.2 | 17.6 | 16.1 | 14.3 | 13.3 | 15.5 | 16.8 | 21 |
In May 2023, the highest daytime temperature in Ontario was 32.4°C.
While the minimum temperature at night dropped to 4.7°C.
The average nighttime and daytime temperatures during May in Ontario are 13.4°C and 25.8°C respectively.
The precipitation sum in May is about 57 mm.