The highest day temperature in March 2026 was 97°F. The lowest night temperature was 15°F. The average values for day and night temperatures during March were 64.2°F и 47.1°F respectivly.

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

Precipitation total in March for Saint Charles is 1.4 in. It makes march one of the most rainy months of the year.

The average wind speed in March is 10.1 mph. It makes March the most windy month of the year for Saint Charles.

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 Saint Charles in March is 6.5 hours.