Last updated: March 2, 2024
The weather in Harriston, Canada, during August is characterized by an average temperature of 19°C (67°F). Highs can soar to 29°C (84°F), while lows may dip to 9°C (48°F). Typically, the humidity level in Harriston throughout August hovers around 80%.
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Average temperature
Maximum temperature
Humidity
In August, Harriston averages 110 mm (4.3 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 13 hours 54 minutes of daylight, with the sun shining for approximately 10 hours 42 minutes each day. Additionally, there is a 48% probability of sunny days during this period.
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Chance of sun
In August, the UV Index in Harriston 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.
| 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 | 1 | 2 | 4 | 6 | 8 | 9 | 9 | 7 | 6 | 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 | ||||||