August Weather in Cornwall

Last updated: March 2, 2024

The weather in Cornwall, Canada, during August is characterized by an average temperature of 21°C (70°F). Highs can soar to 31°C (88°F), while lows may dip to 9°C (49°F). Typically, the humidity level in Cornwall throughout August hovers around 75%.

9°C (49°F)

Minimum temperature

21°C (70°F)

Average temperature

31°C (88°F)

Maximum temperature

75%

Humidity

Precipitation and Sunshine hours

In August, Cornwall averages 100 mm (3.9 inches) of rainfall, typically over the course of 14 rainy days. The month enjoys an average of 13 hours 58 minutes of daylight, with the sun shining for approximately 10 hours 26 minutes each day. Additionally, there is a 41% probability of sunny days during this period.

100 mm (3.9 inches)

Precipitation

14 rainy days

Rainy days

10 hours 26 minutes

Sunshine hours

41%

Chance of sun

UV Index

In August, the UV Index in Cornwall reaches a maximum of 8, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, 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 6 8 8 8 6 4 3 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

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