Click on a day for an hourly weather forecast
The temperatures in Gruissan in May are comfortable with low of 14°C and and high up to 21°C.
You can expect about 3 to 8 days of rain in Gruissan 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 Gruissan in May 2026.
If you’re planning to visit Gruissan in the near future, we highly recommend that you review the 14 day weather forecast for Gruissan before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 11° / 6° | 4 | 26 | 0 | 64 mm | Ok | Gruissan in January |
| February | 12° / 6° | 3 | 25 | 1 | 48 mm | Ok | Gruissan in February |
| March | 15° / 8° | 4 | 27 | 0 | 76 mm | Good | Gruissan in March |
| April | 17° / 10° | 5 | 25 | 0 | 75 mm | Good | Gruissan in April |
| May | 21° / 14° | 4 | 27 | 0 | 62 mm | Good | Gruissan in May |
| June | 26° / 17° | 3 | 27 | 0 | 44 mm | Perfect | Gruissan in June |
| July | 29° / 20° | 2 | 29 | 0 | 32 mm | Good | Gruissan in July |
| August | 28° / 20° | 2 | 29 | 0 | 36 mm | Perfect | Gruissan in August |
| September | 25° / 17° | 3 | 27 | 0 | 53 mm | Perfect | Gruissan in September |
| October | 20° / 14° | 4 | 27 | 0 | 122 mm | Good | Gruissan in October |
| November | 15° / 10° | 4 | 26 | 0 | 98 mm | Good | Gruissan in November |
| December | 12° / 7° | 2 | 29 | 0 | 36 mm | Ok | Gruissan in December |