Last updated: August 27, 2025
In September, the average temperature in Horndal, Sweden hovers around 12°C (53°F). Expect a minimum of -1°C (31°F) and a maximum of 24°C (75°F) during this time. Be prepared for some rain, as the region receives an average of 55 mm (2.2 in) over 9 days. With an average humidity level of 87%, it's a good idea to pack accordingly!
In September in Horndal, the average temperature is 12°C (53°F). Maximums can reach 24°C (75°F), while minimums can be as low as -1°C (31°F). This makes Horndal a seasonally diverse destination for travelers, offering a mix of mild weather and chilly moments.
In Horndal in September, the precipitation amount is 55 mm (2.2 in) over a span of 9 days.
In Horndal in September, humidity is 87%. With an average temperature of 12°C (53°F), this humidity feels like a damp blanket enveloping you, making travel uncomfortable and stifling, as the air thickens and clings to your skin, sapping your energy as you navigate the sights.
In Horndal in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Horndal for better planning.
UV Risk Categories
Weather in Horndal varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Horndal, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 35 mm (1.4 inches) | 96% | low |
| February Weather | -2°C (28°F) | 33 mm (1.3 inches) | 93% | low |
| March Weather | 1°C (34°F) | 38 mm (1.5 inches) | 91% | moderate |
| April Weather | 5°C (41°F) | 30 mm (1.2 inches) | 84% | moderate |
| May Weather | 11°C (51°F) | 60 mm (2.3 inches) | 74% | moderate |
| June Weather | 16°C (62°F) | 69 mm (2.7 inches) | 73% | high |
| July Weather | 18°C (64°F) | 63 mm (2.5 inches) | 73% | high |
| August Weather | 16°C (61°F) | 84 mm (3.3 inches) | 78% | moderate |
| September Weather | 12°C (53°F) | 55 mm (2.2 inches) | 87% | moderate |
| October Weather | 7°C (45°F) | 82 mm (3.2 inches) | 92% | low |
| November Weather | 3°C (37°F) | 49 mm (1.9 inches) | 94% | low |
| December Weather | -1°C (31°F) | 55 mm (2.2 inches) | 94% | low |