Temperature
Cold by day, cold at night.
Baltrum is usually most comfortable in May and September. Typical daytime highs range from 40–71°F across the year. Rain varies by season.

Cold by day, cold at night.
Several rainy days. About 13 wet days this month.
Sunshine is limited, with cloud often dominating.
Humidity is rarely noticeable in the cool air.
In November, afternoons feel about 38° and nights feel near 34°.
Mostly cloudy skies this month.
Breezy November days can feel brisker in open spots.
November late afternoons are around 46°F, easing to about 44°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 40 | 34 | 2.5 | 13 | 3.6 | 88 |
| Feb | 42 | 34 | 2.1 | 11 | 5.3 | 85 |
| Mar | 47 | 36 | 1.8 | 11 | 7.6 | 81 |
| Apr | 55 | 41 | 1.9 | 11 | 10.6 | 76 |
| May | 61 | 47 | 2.4 | 12 | 11.8 | 76 |
| Jun | 66 | 53 | 3.0 | 12 | 12.2 | 77 |
| Jul | 70 | 57 | 3.4 | 16 | 12.1 | 78 |
| Aug | 71 | 57 | 3.4 | 15 | 11.2 | 79 |
| Sep | 65 | 52 | 2.7 | 12 | 8.8 | 82 |
| Oct | 57 | 47 | 2.9 | 14 | 6.4 | 85 |
| Nov | 48 | 40 | 2.4 | 13 | 4.2 | 88 |
| Dec | 42 | 36 | 2.6 | 14 | 3.3 | 89 |
Similar climates
Want a side-by-side climate view? Compare Baltrum with Aachen.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jul 31, 2026
Data & methodology