Deer Isle Weather in May

The climate in Deer Isle during May can be summarized as mild and a little damp.

May is in the spring in Deer Isle and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a cool 18°C (64°F), whilst at night 7°C (44°F) is normal.

On average May is the 5th driest month of the year in Deer Isle with around 98mm 3.9 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.6 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Deer Isle in May 2024.