Month by month
| Month | Afternoon | Sea | Rain | Verdict |
|---|---|---|---|---|
| January | 5.4 °C | — | 18 days | Unfavourable season |
| February | 7.6 °C | — | 13 days | Unfavourable season |
| March | 10.4 °C | — | 14 days | Unfavourable season |
| April | 13.9 °C | — | 12 days | Possible, with trade-offs |
| May | 18.3 °C | — | 13 days | Possible, with trade-offs |
| June | 22.5 °C | — | 12 days | Pleasant — a good time to go |
| July | 23.4 °C | — | 13 days | Pleasant — a good time to go |
| August | 23.8 °C | — | 13 days | Pleasant — a good time to go |
| September | 20 °C | — | 12 days | Pleasant — a good time to go |
| October | 15.2 °C | — | 13 days | Possible, with trade-offs |
| November | 9.7 °C | — | 14 days | Unfavourable season |
| December | 7.1 °C | — | 16 days | Unfavourable season |
Before you go
Three things to check once you have picked your dates.
Entry
Germany is in the European Union. Entry rules depend on your nationality — check before booking.
Safety
No specific restrictions
Usual precautions apply.
Official advice updated 11 August 2026
Health
Recommended vaccinations, water quality, mosquitoes: advice depends on the country and the season. Some vaccines need time before departure.
Beau Fixe is not a safety or health authority. These notes summarise public advisories and link to their source; only the competent authorities are authoritative. Alert levels: Foreign, Commonwealth & Development Office (gov.uk), Open Government Licence v3.0.
FAQ
Can you swim in Dortmund in January?
Dortmund is not a seaside destination (no sea data).
How hot is Dortmund in January?
Expect 5.4°C in the afternoon and 1°C at night, averaged over the last 10 years.
Does it rain a lot in Dortmund in January?
Around 18 days with rain (≥ 1 mm) in the month — 57% of days.