The highest day temperature in May 2025 was 94°F. The lowest night temperature was 38°F. The average values for day and night temperatures during May were 66.0°F и 50.5°F respectivly.

The average sea surface temperature in May 2025 for Evanston was 52.6°F. The maximum and minimum values were 49.4°F and 56.2°F respectively.

You can expect various weather conditions during May. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in May for Evanston is 1.6 in. It makes may the most rainy month of the year.

The average wind speed in May is 8.5 mph.

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 Evanston in May is 7.6 hours.