Saint John Weather in July

The climate in Saint John during July can be summarized as hot and a little damp.

July is in the summer in Saint John and is typically the warmest month of the year. Daytime maximum temperatures average around a warm 34°C (94°F), whilst at night 20°C (67°F) is normal.

On average July is the 3rd wettest month of the year in Saint John with around 82mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 12.2 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 July 2025.