The highest day temperature in September 2023 was 103°F. The lowest night temperature was 57°F. The average values for day and night temperatures during September were 80.3°F и 66.3°F respectivly.

The average sea surface temperature in September 2023 for Oak Park was 71.7°F. The maximum and minimum values were 66.8°F and 75.8°F respectively.

Most of the days in September are sunny but you can also expect cloudy and gloomy days.

Precipitation total in September for Oak Park is 0.8 in. It makes september one of the least rainy months of the year.

The average wind speed in September is 7.3 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Oak Park in September is 8.6 hours.