July in Hempstead averages a daily high of 28.9°C with nights around 20.8°C. Expect roughly 9.6 wet days totalling 98mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Hempstead is August–October.
Based on JFK INTERNATIONAL AIRPORT, NY US (14.3km), 1995–2024. 30 years of July data.