The highest day temperature in January 2026 was 86°F. The lowest night temperature was 65°F. The average values for day and night temperatures during January were 79.3°F и 68.7°F respectivly.

The average sea surface temperature in January 2026 for Saint Louis was 66.0°F. The maximum and minimum values were 63.8°F and 67.2°F respectively.

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

Precipitation total in January for Saint Louis is 0.0 in. It makes january one of the least rainy months of the year.

The average wind speed in January is 12.7 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 Saint Louis in January is 9.8 hours.