Last updated: March 2, 2024
The weather in Waterloo, Canada, during April is characterized by an average temperature of 5°C (42°F). Highs can soar to 21°C (70°F), while lows may dip to -8°C (19°F). Typically, the humidity level in Waterloo throughout April hovers around 85%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In April, Waterloo averages 120 mm (4.7 inches) of rainfall, typically over the course of 16 rainy days. The month enjoys an average of 13 hours 32 minutes of daylight, with the sun shining for approximately 7 hours 8 minutes each day. Additionally, there is a 33% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In April, the UV Index in Waterloo reaches a maximum of 7, indicating a level of High exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 25 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 | 2 | 3 | 5 | 6 | 7 | 7 | 7 | 5 | 3 | 2 | 1 | 1 |
| Exposure | Low | Moderate | High | Moderate | Low | ||||||||
| Time to burn | 45 min | 30 min | 25 min | 30 min | 45 min | ||||||||