Last updated: August 27, 2025
In May, the average temperature in St. Day, United Kingdom is a mild 12°C (54°F), with temperatures ranging from a cool 4°C (40°F) to a comfortable 22°C (72°F). Expect about 65 mm (2.5 in) of precipitation spread over 12 days, contributing to an average humidity of 85%. This combination of climate factors sets the stage for a unique, refreshing experience in St. Day!
In May, in St. Day, the average temperature is 12°C (54°F), with maximums reaching 22°C (72°F) and minimums dropping as low as 4°C (40°F). This weather offers a comfortable climate for exploring and enjoying outdoor activities during your trip.
In St. Day in May, the precipitation amount is 65 mm (2.5 in) over the course of 12 days.
In St. Day in May, humidity is 85%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket wrapping around you, making traveling not only uncomfortable but also exhausting as the damp air clings to your skin and slows your movements.
In St. Day in May, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in St. Day.
UV Risk Categories
Weather in St. Day varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in St. Day, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 8°C (46°F) | 70 mm (2.8 inches) | 81% | low |
| February Weather | 8°C (47°F) | 85 mm (3.4 inches) | 84% | low |
| March Weather | 9°C (48°F) | 84 mm (3.3 inches) | 83% | moderate |
| April Weather | 10°C (50°F) | 50 mm (2.0 inches) | 84% | high |
| May Weather | 12°C (54°F) | 65 mm (2.5 inches) | 85% | high |
| June Weather | 15°C (59°F) | 82 mm (3.2 inches) | 86% | very high |
| July Weather | 17°C (63°F) | 67 mm (2.6 inches) | 87% | very high |
| August Weather | 17°C (62°F) | 62 mm (2.4 inches) | 86% | high |
| September Weather | 15°C (60°F) | 67 mm (2.6 inches) | 85% | high |
| October Weather | 13°C (55°F) | 118 mm (4.6 inches) | 85% | moderate |
| November Weather | 10°C (51°F) | 100 mm (3.9 inches) | 82% | low |
| December Weather | 9°C (49°F) | 123 mm (4.8 inches) | 80% | low |