Click on a day for an hourly weather forecast
The temperatures in Jena in May are quite cold with temperatures between 7°C and 18°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Jena during the month of May. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Jena in May 2026.
If you’re planning to visit Jena in the near future, we highly recommend that you review the 14 day weather forecast for Jena before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 2° / -3° | 6 | 12 | 13 | 59 mm | Awful | Jena in January |
| February | 4° / -2° | 5 | 14 | 9 | 42 mm | Awful | Jena in February |
| March | 9° / 1° | 6 | 20 | 5 | 50 mm | Bad | Jena in March |
| April | 14° / 4° | 4 | 24 | 2 | 46 mm | Ok | Jena in April |
| May | 18° / 7° | 7 | 24 | 0 | 111 mm | Ok | Jena in May |
| June | 22° / 11° | 7 | 23 | 0 | 119 mm | Ok | Jena in June |
| July | 24° / 13° | 6 | 25 | 0 | 115 mm | Perfect | Jena in July |
| August | 24° / 13° | 5 | 26 | 0 | 99 mm | Perfect | Jena in August |
| September | 20° / 10° | 4 | 26 | 0 | 73 mm | Good | Jena in September |
| October | 14° / 6° | 6 | 25 | 0 | 65 mm | Good | Jena in October |
| November | 9° / 3° | 5 | 22 | 2 | 58 mm | Bad | Jena in November |
| December | 4° / 0° | 7 | 17 | 7 | 62 mm | Awful | Jena in December |