Mattapoisett Weather in July

The climate in Mattapoisett during July can be summarized as warm, humid and reasonably dry.

July is in the summer in Mattapoisett and is typically the warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (80°F), whilst at night 18°C (64°F) is normal.

On average July is the driest month of the year in Mattapoisett with around 75mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.4 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 Mattapoisett in July 2025.