Last updated: August 27, 2025
In April, the average temperature in Welwyn Garden City, United Kingdom is a cool 9°C (49°F), with fluctuations ranging from a brisk -2°C (29°F) to a comfortable 27°C (80°F). Expect about 32 mm (1.3 in) of precipitation over 8 days, contributing to an average humidity of 85%—perfect for those who enjoy a fresh, invigorating atmosphere!
In April in Welwyn Garden City, the average temperature is 9°C (49°F). Maximums can reach 27°C (80°F), while minimums can be as low as -2°C (29°F). This makes it an ideal time for travelers to experience a mix of mild and chilly weather, perfect for exploring the outdoors or enjoying cozy indoor activities.
In Welwyn Garden City in April, the precipitation amount is 32 mm (1.3 in) over the course of 8 days.
In Welwyn Garden City in April humidity is 85%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making every step outside a challenge as the moisture in the air weighs heavily and lingers, transforming even simple outings into a quest for comfort.
In Welwyn Garden City in April, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Welwyn Garden City.
UV Risk Categories
Weather in Welwyn Garden City varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Welwyn Garden City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (41°F) | 54 mm (2.1 inches) | 91% | low |
| February Weather | 6°C (43°F) | 51 mm (2.0 inches) | 89% | low |
| March Weather | 7°C (45°F) | 56 mm (2.2 inches) | 86% | moderate |
| April Weather | 9°C (49°F) | 32 mm (1.3 inches) | 85% | moderate |
| May Weather | 13°C (55°F) | 65 mm (2.5 inches) | 79% | high |
| June Weather | 16°C (62°F) | 74 mm (2.9 inches) | 80% | very high |
| July Weather | 18°C (65°F) | 67 mm (2.6 inches) | 71% | very high |
| August Weather | 18°C (64°F) | 72 mm (2.8 inches) | 76% | high |
| September Weather | 15°C (59°F) | 49 mm (1.9 inches) | 82% | high |
| October Weather | 12°C (53°F) | 86 mm (3.4 inches) | 90% | moderate |
| November Weather | 8°C (46°F) | 51 mm (2.0 inches) | 92% | low |
| December Weather | 6°C (43°F) | 83 mm (3.3 inches) | 92% | low |