Saint Louis — Water Temperature in March

Water Temperature Range

16°C

minimum

18°C

average

22°C

maximum

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Water Temperature Chart for Month

The chart shows the average daily water temperature for each day of the month based on historical data.

Table of Water Temperatures by Day of the Month for Previous Years

Day	2026	2025	2024	2023
MAR 1	-10°C	18°C	18°C	18°C
MAR 2	17°C	18°C	17°C	18°C
MAR 3	17°C	18°C	17°C	18°C
MAR 4	17°C	18°C	17°C	18°C
MAR 5	17°C	18°C	18°C	18°C
MAR 6	17°C	18°C	18°C	17°C
MAR 7	17°C	18°C	17°C	18°C
MAR 8	17°C	18°C	17°C	18°C
MAR 9	17°C	18°C	16°C	18°C
MAR 10	17°C	18°C	16°C	18°C
MAR 11	17°C	18°C	16°C	17°C
MAR 12	17°C	18°C	16°C	18°C
MAR 13	17°C	19°C	17°C	18°C
MAR 14	18°C	19°C	16°C	18°C
MAR 15	18°C	19°C	17°C	18°C
MAR 16	18°C	19°C	17°C	18°C
MAR 17	18°C	19°C	16°C	18°C
MAR 18	18°C	19°C	16°C	19°C
MAR 19	18°C	19°C	16°C	19°C
MAR 20	18°C	18°C	16°C	18°C
MAR 21	18°C	19°C	17°C	19°C
MAR 22	18°C	19°C	17°C	19°C
MAR 23	18°C	19°C	17°C	19°C
MAR 24	19°C	19°C	16°C	19°C
MAR 25	19°C	18°C	16°C	19°C
MAR 26	19°C	19°C	17°C	19°C
MAR 27	19°C	19°C	17°C	19°C
MAR 28	19°C	18°C	17°C	19°C
MAR 29	19°C	18°C	17°C	19°C
MAR 30	18°C	18°C	16°C	19°C
MAR 31	19°C	18°C	17°C	18°C

March: Climate and Swimming Opportunities

Average Night Air Temperature

19°C

Average Day Air Temperature

35°C

Precipitation Amount per Month

0 mm

Number of Rainy Days

Daylight per Day

12 hrs

Sunshine per Day

9 hrs

Average Wind Speed

13 km/h

Average Humidity

50%

With such a ratio between the average monthly temperatures of water and air, the swim feels brisk and very refreshing. The air is warm enough to make the cool water easy to handle, especially for short swims.