Last updated: August 23, 2025
In Haltern am See, Germany, the average temperature in September hovers around 15°C (60°F), with extremes ranging from a brisk 2°C (36°F) to a warm 32°C (90°F). This month typically sees an average precipitation of 61 mm (2.4 in) spread over 10 days, contributing to a high average humidity of 81%. Enjoy the mild climate while staying prepared for the occasional rain!
In September in Haltern am See, the average temperature is 15°C (60°F), with maximums reaching up to 32°C (90°F) and minimums dropping as low as 2°C (36°F). Travelers should pack accordingly to enjoy both warm days and cooler nights.
In Haltern am See in September, the precipitation amount is 61 mm (2.4 in) over a span of 10 days.
In Haltern am See in September, humidity is 81%. With an average temperature of 15°C (60°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sluggish and draining, which can challenge even the best-prepared traveler.
In Haltern am See 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 Haltern am See.
UV Risk Categories
Weather in Haltern am See varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Haltern am See, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (39°F) | 71 mm (2.8 inches) | 91% | low |
| February Weather | 5°C (40°F) | 80 mm (3.1 inches) | 90% | low |
| March Weather | 7°C (44°F) | 75 mm (3.0 inches) | 87% | moderate |
| April Weather | 10°C (50°F) | 35 mm (1.4 inches) | 84% | moderate |
| May Weather | 14°C (57°F) | 58 mm (2.3 inches) | 77% | high |
| June Weather | 19°C (66°F) | 59 mm (2.3 inches) | 74% | very high |
| July Weather | 19°C (67°F) | 82 mm (3.2 inches) | 72% | very high |
| August Weather | 19°C (67°F) | 70 mm (2.7 inches) | 71% | high |
| September Weather | 15°C (60°F) | 61 mm (2.4 inches) | 81% | moderate |
| October Weather | 12°C (54°F) | 88 mm (3.5 inches) | 88% | moderate |
| November Weather | 7°C (45°F) | 55 mm (2.2 inches) | 91% | low |
| December Weather | 5°C (41°F) | 96 mm (3.8 inches) | 92% | low |