Islip Weather in July

The climate in Islip during July can be summarized as hot, humid and a little damp.

July is in the summer in Islip and is typically the warmest month of the year. Daytime maximum temperatures average around a muggy 28°C (82°F), whilst at night 18°C (65°F) is normal.

On average July is the 5th driest month of the year in Islip with around 91mm 3.6 inches of rain making it a a little damp 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 Islip in July 2025.