Last updated: June 24, 2025
In April, the average temperature in West Haven-Sylvan, United States hovers around 11°C (51°F). Temperatures can dip to a chilly -1°C (31°F) or soar to a warm 29°C (84°F). Expect about 117 mm (4.6 in) of precipitation spread over 15 days, with an average humidity of 83%. Be prepared for a month that showcases the rich variety of weather!
In April in West Haven-Sylvan, the average temperature is 11°C (51°F). Maximums can reach 29°C (84°F) and minimums can be as low as -1°C (31°F). This variability makes it essential for travelers to pack accordingly, ensuring they are prepared for both warm afternoons and chilly evenings.
In West Haven-Sylvan in April, the total precipitation amount is 117 mm (4.6 in), occurring over the course of 15 days.
In West Haven-Sylvan 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 West Haven-Sylvan 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 West Haven-Sylvan, you can refer to this Hourly UV Index in West Haven-Sylvan.
UV Risk Categories
Weather in West Haven-Sylvan varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in West Haven-Sylvan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (42°F) | 163 mm (6.4 inches) | 85% | low |
| February Weather | 5°C (41°F) | 172 mm (6.8 inches) | 84% | moderate |
| March Weather | 8°C (46°F) | 135 mm (5.3 inches) | 85% | moderate |
| April Weather | 11°C (51°F) | 117 mm (4.6 inches) | 83% | high |
| May Weather | 14°C (58°F) | 58 mm (2.3 inches) | 83% | very high |
| June Weather | 18°C (64°F) | 46 mm (1.8 inches) | 83% | very high |
| July Weather | 21°C (69°F) | 6 mm (0.2 inches) | 82% | very high |
| August Weather | 21°C (70°F) | 8 mm (0.3 inches) | 74% | very high |
| September Weather | 18°C (64°F) | 62 mm (2.4 inches) | 71% | high |
| October Weather | 12°C (53°F) | 105 mm (4.1 inches) | 81% | moderate |
| November Weather | 8°C (47°F) | 155 mm (6.1 inches) | 87% | moderate |
| December Weather | 5°C (41°F) | 183 mm (7.2 inches) | 87% | low |