Last updated: June 24, 2025
In Happy Valley, United States, the average temperature in April hovers around 11°C (51°F), offering a mild climate. However, be prepared for fluctuations, as temperatures can dip to a chilling -1°C (30°F) or soar to a warm 28°C (84°F). This month also experiences considerable rainfall, with an average precipitation of 142 mm (5.6 in) spread over 16 days, all while maintaining a relatively high humidity level of 83%.
In April in Happy Valley, the average temperature is 11°C (51°F). Maximums can reach 28°C (84°F), while minimums can drop as low as -1°C (30°F). This variability makes it essential to pack layers for your travels to Happy Valley during this month.
In Happy Valley in April, the precipitation amount is 142 mm (5.6 in) distributed over 16 days.
In Happy Valley in April, humidity is 83%. With an average temperature of 11°C (51°F), this humidity feels like a chilly dampness that clings to your skin, making any outdoor adventures a bit uncomfortable and best enjoyed with layered clothing and a light raincoat.
In Happy Valley in April, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Happy Valley, you can refer to this Hourly UV Index in Happy Valley.
UV Risk Categories
Weather in Happy Valley varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Happy Valley, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (41°F) | 203 mm (8.0 inches) | 85% | low |
| February Weather | 5°C (41°F) | 227 mm (9.0 inches) | 84% | moderate |
| March Weather | 8°C (46°F) | 161 mm (6.3 inches) | 85% | moderate |
| April Weather | 11°C (51°F) | 142 mm (5.6 inches) | 83% | high |
| May Weather | 14°C (58°F) | 71 mm (2.8 inches) | 83% | very high |
| June Weather | 18°C (64°F) | 59 mm (2.3 inches) | 83% | very high |
| July Weather | 21°C (69°F) | 7 mm (0.3 inches) | 82% | very high |
| August Weather | 21°C (70°F) | 10 mm (0.4 inches) | 74% | very high |
| September Weather | 18°C (64°F) | 83 mm (3.3 inches) | 71% | high |
| October Weather | 11°C (53°F) | 155 mm (6.1 inches) | 81% | moderate |
| November Weather | 8°C (46°F) | 207 mm (8.1 inches) | 87% | moderate |
| December Weather | 5°C (41°F) | 233 mm (9.2 inches) | 87% | low |