May Weather in Alliston

Last updated: March 2, 2024

The weather in Alliston, Canada, during May is characterized by an average temperature of 13°C (55°F). Highs can soar to 30°C (87°F), while lows may dip to 0°C (32°F). Typically, the humidity level in Alliston throughout May hovers around 74%.

0°C (32°F)

Minimum temperature

13°C (55°F)

Average temperature

30°C (87°F)

Maximum temperature

74%

Humidity

Precipitation and Sunshine hours

In May, Alliston averages 99 mm (3.9 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 14 hours 47 minutes of daylight, with the sun shining for approximately 9 hours 13 minutes each day. Additionally, there is a 46% probability of sunny days during this period.

99 mm (3.9 inches)

Precipitation

13 rainy days

Rainy days

9 hours 13 minutes

Sunshine hours

46%

Chance of sun

UV Index

In May, the UV Index in Alliston reaches a maximum of 9, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 15 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 1 2 3 5 7 8 9 9 7 5 4 2 1
Exposure Low Moderate High VeryHigh High Moderate Low
Time to burn 45 min 30 min 25 min 15 min 25 min 30 min 45 min

Compare Alliston's Climate with Cities Worldwide