Saint John Weather in May

The climate in Saint John during May can be summarized as warm and a little damp.

May is in the spring in Saint John and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (78°F), whilst at night 11°C (52°F) is normal.

On average May is the 2nd wettest month of the year in Saint John with around 88mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.

On the flip side this corresponds to an average of 10.2 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 Saint John in May 2024.