Last updated: March 2, 2024
The weather in Waterloo, United States, during August is characterized by an average temperature of 22°C (72°F). Highs can soar to 31°C (89°F), while lows may dip to 11°C (53°F). Typically, the humidity level in Waterloo throughout August hovers around 79%.
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Average temperature
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Humidity
In August, Waterloo averages 101 mm (4.0 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 13 hours 45 minutes of daylight, with the sun shining for approximately 10 hours 46 minutes each day. Additionally, there is a 45% probability of sunny days during this period.
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Chance of sun
In August, the UV Index in Waterloo 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 | 8 | 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 | ||||||