March weather forecastSt. Louis, MO
March
Weather in March
March is characteristic of transitional weather in St. Louis, Missouri. The mercury level steadily rises, hinting at the forthcoming arrival of spring. This month sees a significant jump in average temperatures to 36.6°F (2.6°C). The snowfall finally dwindles, signaling the end of the winter season. Consequently, the transformation from winter to spring presages an environment full of blooming flora and warming weather.Temperature
St. Louis, Missouri, experiences a temperature shift with the start of March, with average high-temperatures moving from a chilly 45°F (7.2°C) in February to a moderate 55.9°F (13.3°C). During March, St. Louis's temperature falls to a steady low-temperature average of 36.7°F (2.6°C).Humidity
In March, the average relative humidity in St. Louis is 68.3%.Rainfall
In St. Louis, during March, the rain falls for 10.3 days and regularly aggregates up to 3.31" (84mm) of precipitation. Throughout the year, in St. Louis, there are 112.6 rainfall days, and 40.94" (1040mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in St. Louis. In St. Louis, during March, snow falls for 1.7 days and regularly aggregates up to 2.28" (58mm) of snow. Throughout the year, in St. Louis, there are 14.5 snowfall days, and 17.72" (450mm) of snow is accumulated.Daylight
In March, the average length of the day in St. Louis is 11h and 59min.On the first day of March in St. Louis, sunrise is at 6:31 am and sunset at 5:54 pm CST. On the last day of the month, sunrise is at 6:45 am and sunset at 7:23 pm CDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from CDT to CST.
Sunshine
The average sunshine in March in St. Louis is 6.4h.UV index
In St. Louis, Missouri, the average daily maximum UV index in March is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: In March, a regular UV index of 5 translates into these guidelines:
Undertake precautions - It is suggested to shield oneself from sunburn. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in March
St. Louis, MO
- Average high temperature in March: 55.9°F
The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is January (39.9°F).
- Average low temperature in March: 36.6°F
The month with the highest average low temperature is July (71°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).
Average humidity in March
St. Louis, MO
- Average humidity in March: 68.3%
The month with the highest relative humidity is December (75.8%).
The month with the lowest relative humidity is April (63.5%).
Average rainfall in March
St. Louis, MO
- Average rainfall in March: 3.3"
The wettest month (with the highest rainfall) is May (4.7").
The driest month (with the least rainfall) is February (2.2").
Average rainfall days in March
St. Louis, MO
- Average rainfall days in March: 10.3 days
The month with the highest number of rainy days is May (11.9 days).
The month with the least rainy days is September (7.4 days).
Average snowfall in March
St. Louis, MO
- Average snowfall in March: 2.3"
The month with the highest snowfall is January (5.6").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in March
St. Louis, MO
- Average snowfall days in March: 1.7 days
The month with the highest number of snowfall days is January (4.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in March /
Average sunshine in March
St. Louis, MO
- Average daylight in March: 12h and 0min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in March: 6h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average UV index in March
St. Louis, MO
- Average UV index in March: 5
The months with the highest UV index are June, July and August (UV index 9).
The months with the lowest UV index are January and December (UV index 2).
