October is a slightly cold and rainy time for sunbathing in Illinois. October is a good month for swimming in Illinois with 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 October.
The average maximum temperature in Illinois in October is 17°. The average maximum temperature is 24° in the previous month and 10° in the next month.
The average temperature in Illinois in October is 13°. The average temperature ranges is 20° in the previous month and 6° in the next month.
The average minimum temperature in Illinois in October is 8°. The minimum temperature is 15° in the previous month and 2° in the next month.
The average day light hours per day in Illinois in October are 11.1 and there are 6.9 hours of sunshine per day on average during October making it a quite sunny month with some cloud cover.
The ultraviolet index in Illinois in October is typically 4 during October. An ultraviolet index reading of 3 to 5 indicates there is a moderate risk of harm from unprotected sun exposure. Keep out of the sun during the strongest hours around midday when unprotected skin risks burning in less than 30 minutes. For the sensitive 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, and after swimming or sweating. Tanning for hours is possible with the right application of sun cream. Watch out for relections from water that may increase ultraviolet exposure.
The average sea water temperature in Illinois in October is 24.4° which is warm and pleasant for relaxing and swimming for long periods.
The average total rainfall in Illinois in October is 83.4cm and on average there are 13.7 rainy days in October making it a wet time to visit the beach.
The maximum dew point (an indicator of humidity) in Illinois in October is 9° which is a bit dry for some. The dew point is 15° in the previous month and 3° in the next month.
The average maximum relative humidity in Illinois in October is typically 83.4%. The maximum relative humidity is 84.1% in the previous month and 81.1% in the next month.
The average relative humidity in Illinois in October is typically 65.2%. The average relative humidity is 64.8% in the previous month and 65.8% in the next month.
The average maximum wind speed in Illinois in October is typically 28kmh. The average maximum wind speed is 25kmh in the previous month and 29kmh in the next month.
The average wind speed in Illinois in October is typically 15kmh. The average wind speed is 13kmh in the previous month and 16kmh in the next month.
The average wind direction in Illinois in October is from the West-Southwest.
