May scores 69/100 for outdoor ceremonies: low rain risk (7 wet days, 42mm), 20°C afternoons cooling to about 15°C for the reception, and 15.4 hours of daylight for the photography schedule. January is the month to avoid at 30/100.
May outdoor ceremony score: 69/100
Climate normals for Cologne rescored on wedding-specific weighting. Once your date falls inside the 14-day window the live forecast on this page takes over.
Last updated: · Live forecast data refreshes hourly.
| Best wedding month | May — 69/100 |
| Second choice | June — 63/100 |
| Month to avoid | January — 30/100 |
| Rain risk in the best month | Low — rain on about 7 days |
| Guest comfort | 93/100 at 20°C |
| Reception temperature | ≈ 15°C after sunset in May |
| Photo light | 9h of sun across a 15.4h day |
| Months scoring 65+ | 1 of 12 |
May keeps seated guests at 20°C in the afternoon and around 15°C after sunset — the closest Cologne gets to a ceremony that needs neither shade structures nor patio heaters.
Rain falls on roughly 7 days in May (low risk, 42mm). A simple marquee-on-standby is usually enough.
May gives 15.4 hours of daylight and about 9 hours of direct sun per day, so a late-afternoon ceremony puts portraits inside golden hour rather than after it.
January scores 30/100 for weddings in Cologne: 6°C highs, 54mm of rain and 2°C evenings make a fully outdoor plan fragile.
Scored on rain risk, guest comfort, evening temperature and photographic light — deliberately different weighting from the travel score.
| Month | Wedding score | Rain risk | Afternoon | Evening | Guest comfort | Photo light |
|---|---|---|---|---|---|---|
| January | 30/100 | Moderate (9 days) | 6°C | 2°C | 46/100 | 28/100 |
| February | 32/100 | Moderate (9 days) | 7°C | 3°C | 49/100 | 31/100 |
| March | 49/100 | Low (7 days) | 11°C | 6°C | 63/100 | 56/100 |
| April | 60/100 | Low (7 days) | 16°C | 11°C | 80/100 | 60/100 |
| May | 69/100 | Low (7 days) | 20°C | 15°C | 93/100 | 71/100 |
| June | 63/100 | Moderate (9 days) | 24°C | 19°C | 92/100 | 59/100 |
| July | 61/100 | Moderate (9 days) | 25°C | 20°C | 87/100 | 58/100 |
| August | 54/100 | Moderate (11 days) | 24°C | 19°C | 92/100 | 41/100 |
| September | 52/100 | Moderate (11 days) | 20°C | 15°C | 93/100 | 37/100 |
| October | 42/100 | Moderate (11 days) | 16°C | 11°C | 80/100 | 26/100 |
| November | 40/100 | Moderate (9 days) | 11°C | 6°C | 63/100 | 36/100 |
| December | 31/100 | Moderate (9 days) | 7°C | 3°C | 49/100 | 27/100 |
Wedding weather is scored differently from travel weather: seated guests in formalwear tolerate a narrower band than sightseers, and the ceremony hour matters more than the daily average. Each month in Cologne is scored 0–100 on the weighting below.
| Factor | Weight | What it measures |
|---|---|---|
| Dry conditions | 38% | Share of days with measurable rain — the single factor most likely to force a backup plan. |
| Guest comfort | 27% | Distance from a 22°C daytime ideal, with an extra penalty for humid heat above 24°C. |
| Evening temperature | 20% | Modelled reception-hour temperature against an 18°C ideal for an outdoor evening. |
| Photo light | 15% | Sunshine hours and daylight length, which set the length and quality of the golden hour window. |
Based on long-run climate averages rather than a forecast. Plan the ceremony around the golden hour — see golden hour times for Cologne linked below.
May, at 69/100. It combines low rain risk with 20°C afternoons and roughly 15°C evenings, which is the most forgiving combination Cologne offers for seated guests.
January scores 30/100: 6°C highs, 54mm of rain over about 9 days and 2°C evenings make a fully outdoor plan fragile.
In May rain falls on roughly 7 of 30 days, so the single-day probability is about 23%. In January that rises to about 30%.
A marquee on standby is usually enough in May, where rain risk is low. Outside the 1 months scoring 65 or higher, book real covered space.
May gives 15.4 hours of daylight and about 9 hours of direct sun. Put portraits in the final 60–90 minutes of daylight so they land inside golden hour rather than after it.