July is a hot and rainy time for sunbathing in Illinois. July is an excellent month for swimming in Illinois with very warm sea temperatures. Consider visiting Illinois in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for July.
The average maximum temperature in Illinois in July is 29°. The average maximum temperature is 27° in the previous month and 28° in the next month.
The average temperature in Illinois in July is 24°. The average temperature ranges is 22° in the previous month and 23° in the next month.
The average minimum temperature in Illinois in July is 20°. The minimum temperature is 17° in the previous month and 19° in the next month.
The average day light hours per day in Illinois in July are 14.9 and there are 11 hours of sunshine per day on average during July making it a very sunny and pleasant month with long bright days.
The ultraviolet index in Illinois in July is typically 9.7 during July. An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.
The average sea water temperature in Illinois in July is 28° which is very warm and ideal for relaxing and swimming for the whole day.
The average total rainfall in Illinois in July is 92.1cm and on average there are 12.1 rainy days in July making it a wet time to visit the beach.
The maximum dew point (an indicator of humidity) in Illinois in July is 19° which is somewhat uncomfortable for most people in cities but fine on a beach. The dew point is 17° in the previous month and 19° in the next month.
The average maximum relative humidity in Illinois in July is typically 82.3%. The maximum relative humidity is 82.3% in the previous month and 84% in the next month.
The average relative humidity in Illinois in July is typically 62.2%. The average relative humidity is 62.3% in the previous month and 65.2% in the next month.
The average maximum wind speed in Illinois in July is typically 28kmh. The average maximum wind speed is 30kmh in the previous month and 26kmh in the next month.
The average wind speed in Illinois in July is typically 13kmh. The average wind speed is 14kmh in the previous month and 12kmh in the next month.
The average wind direction in Illinois in July is from the South West.
