The temperatures in Lannion in May are quite cold with temperatures between 9°C and 14°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Lannion 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 Lannion in May 2026.
If you’re planning to visit Lannion in the near future, we highly recommend that you review the 14 day weather forecast for Lannion before you arrive.
Temperatures
14° / 9°
Rainy Days
5
Snowy Days
0
Dry Days
26
Rainfall
82
mm
Sun Hours
8.9
Hrs
