Monthly climate averages for Hemer, Germany. Based on 10-year ERA5 reanalysis data.
Cfb Oceanic
Climate OverviewHemer, Germany in December has cold conditions, with highs averaging around 5.9°C (43°F). Rain falls on about 15 days this month, totalling around 84 mm.
This month falls at the beginning of Winter. Cold conditions dominate the month.
Temperatures remain fairly steady throughout December, with daily highs around 5°C (41°F).
Rainfall is heaviest during the last third of the month, while the middle tends to be drier.
The warmest days tend to fall around the 21th, averaging 7.3°C (45°F).
Compared to November, this month is about 3°C cooler with 1 more rainy days.
Daily averages based on historical data (2016–2025)
Cold daytime highs of 6°C (43°F) mean shorter outdoor excursions with warming breaks. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.
Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.
Recent yearly records for December have stayed close to the long-run average.
| Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 4°C / 0°C | 0°C / -4°C | 16days (97 mm) Wet | 3.2h Poor | 88% Very Muggy | 1 Low | Poor | View Details |
| February | 7°C / 1°C | 3°C / -3°C | 14days (82 mm) Wet | 5.1h Fair | 82% Humid | 1.7 Low | Poor | View Details |
| March | 10°C / 2°C | 6°C / -2°C | 13days (70 mm) Wet | 7.1h Good | 77% Humid | 3.4 Moderate | Poor | View Details |
| April | 13°C / 5°C | 10°C / 1°C | 12days (60 mm) Wet | 9.6h Good | 73% Muggy | 4.4 Moderate | Fair | View Details |
| May best | 17°C / 9°C | 16°C / 6°C | 12days (69 mm) Wet | 10.8h Excellent | 72% Muggy | 5.8 High | Good | View Details |
| June best | 22°C / 13°C | 21°C / 12°C | 10days (74 mm) Wet | 11.3h Excellent | 71% Muggy | 6.3 High | Excellent | View Details |
| July best | 22°C / 14°C | 22°C / 13°C | 13days (84 mm) Wet | 11.1h Excellent | 71% Muggy | 5.8 High | Excellent | View Details |
| August best | 23°C / 15°C | 23°C / 14°C | 13days (73 mm) Wet | 10.3h Excellent | 73% Muggy | 5.3 High | Excellent | View Details |
| September best | 19°C / 12°C | 18°C / 10°C | 11days (68 mm) Wet | 8.6h Good | 76% Humid | 4.1 Moderate | Good | View Details |
| October | 14°C / 9°C | 12°C / 6°C | 15days (86 mm) Wet | 5.3h Fair | 83% Humid | 2.3 Moderate | Fair | View Details |
| November | 9°C / 4°C | 6°C / 0°C | 14days (72 mm) Wet | 4h Fair | 87% Very Muggy | 1.3 Low | Poor | View Details |
| December | 6°C / 2°C | 2°C / -2°C | 15days (84 mm) Wet | 2.6h Poor | 89% Very Muggy | 0.8 Low | Poor | View Details |
Full winter gear is a must — insulated coat, thermal base layers, warm hat, gloves, and waterproof boots.
A waterproof jacket or compact umbrella is recommended for occasional showers.
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