Last updated: August 27, 2025
In September, the average temperature in Caister-on-Sea, United Kingdom hovers around 16°C (61°F), offering a mild climate perfect for outdoor activities. Expect minimum temperatures dipping to 11°C (52°F) and highs reaching up to 21°C (69°F). With an average precipitation of 73 mm (2.9 in) spread over 11 days and an average humidity level of 84%, pack accordingly to enjoy what this charming locale has to offer!
In September in Caister-on-Sea, the average temperature is 16°C (61°F). Maximum temperatures can reach 21°C (69°F), while minimums can drop as low as 11°C (52°F). This mild climate makes it an ideal time for travelers to explore the sights and enjoy outdoor activities.
In Caister-on-Sea in September, the precipitation amount is 73 mm (2.9 in), spread over 11 days.
In Caister-on-Sea in September, humidity is 84%. With an average temperature of 16°C (61°F), this humidity feels like a blanket of warmth, making travel slightly sticky but overall comfortable, as long as you stay hydrated and take breaks in the shade.
In Caister-on-Sea in September, 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 Caister-on-Sea.
UV Risk Categories
Weather in Caister-on-Sea varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Caister-on-Sea, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 6°C (43°F) | 61 mm (2.4 inches) | 89% | low |
| February Weather | 6°C (43°F) | 71 mm (2.8 inches) | 87% | low |
| March Weather | 7°C (44°F) | 60 mm (2.4 inches) | 86% | moderate |
| April Weather | 8°C (47°F) | 28 mm (1.1 inches) | 85% | moderate |
| May Weather | 11°C (52°F) | 51 mm (2.0 inches) | 83% | high |
| June Weather | 14°C (58°F) | 63 mm (2.5 inches) | 83% | very high |
| July Weather | 17°C (62°F) | 60 mm (2.4 inches) | 79% | very high |
| August Weather | 18°C (64°F) | 81 mm (3.2 inches) | 78% | high |
| September Weather | 16°C (61°F) | 73 mm (2.9 inches) | 84% | moderate |
| October Weather | 13°C (56°F) | 104 mm (4.1 inches) | 88% | moderate |
| November Weather | 10°C (50°F) | 67 mm (2.6 inches) | 89% | low |
| December Weather | 7°C (45°F) | 107 mm (4.2 inches) | 88% | low |