March weather forecast and climate
St. Louis, MO

A beautiful twilight over the Gateway Arch in St. Louis, Missouri
A beautiful twilight over the Gateway Arch in St. Louis, Missouri

Weather in March

March, the first month of the spring, in St. Louis, is a moderate month, with average temperature varying between 55.9°F (13.3°C) and 36.7°F (2.6°C).

Temperature

In March, the average high-temperature in St. Louis rises, from a frosty 45°F (7.2°C) in February, to a moderate 55.9°F (13.3°C). In March, in St. Louis, the average low-temperature is 36.7°F (2.6°C).

Humidity

In March, the average relative humidity in St. Louis is 68.3%.

Rainfall

In St. Louis, Missouri, in March, during 10.3 rainfall days, 3.32" (84.3mm) of precipitation is typically accumulated. Throughout the year, in St. Louis, there are 112.6 rainfall days, and 40.96" (1040.3mm) of precipitation is accumulated.

Snowfall

Months with snowfall in St. Louis, Missouri, are January through April, November and December. In St. Louis, snow falls for 1.7 days, with typically accumulated 2.3" (58.4mm) of snow. In St. Louis, Missouri, during the entire year, snow falls for 14.5 days, and aggregates up to 17.7" (449.6mm) of snow.

Daylight

In St. Louis, Missouri, the average length of the day is 12h.

Sunshine

In St. Louis, the average sunshine is 6.4h.

UV index

In St. Louis, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: In March, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
[Resources]

FAQ

What is the average humidity in March in St. Louis?

In March, the average relative humidity in St. Louis is 68.3%.

How much does it rain in St. Louis in March?

In St. Louis, in March, it is raining for 10.3 days, with typically 3.32" (84.3mm) of accumulated precipitation.

How much does it snow in St. Louis in March?

In March, in St. Louis, Missouri, it is snowing for 1.7 days. Throughout March, 2.3" (58.4mm) of snow is accumulated.

What is the average length of the day in March in St. Louis?

The average length of the day in March in St. Louis, Missouri, is 12h.

How many hours of sunshine does St. Louis have in March?

The average sunshine in March in St. Louis, Missouri, is 6.4h.

What is the UV index reading in March in St. Louis?

In March, the average daily maximum UV index in St. Louis is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in March
St. Louis, MO

Average temperature in March - St. Louis, MO
  • Average high temperature in March: 13.3°C

The warmest month (with the highest average high temperature) is July (31.7°C).
The month with the lowest average high temperature is January (4.4°C).

  • Average low temperature in March: 2.6°C

The month with the highest average low temperature is July (21.7°C).
The coldest month (with the lowest average low temperature) is January (-4.6°C).

[Resources]

Average humidity in March
St. Louis, MO

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%).

[Resources]

Average rainfall in March
St. Louis, MO

Average rainfall in March - St. Louis, MO
  • Average rainfall in March: 84.3mm

The wettest month (with the highest rainfall) is May (119.9mm).
The driest month (with the least rainfall) is February (56.9mm).

[Resources]

Average rainfall days in March
St. Louis, MO

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).

[Resources]

Average snowfall in March
St. Louis, MO

Average snowfall in March - St. Louis, MO
  • Average snowfall in March: 58.4mm

The month with the highest snowfall is January (142.2mm).
Months with the least snowfall are May, June, July, August, September and October (0mm).

[Resources]

Average snowfall days in March
St. Louis, MO

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).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

[Resources]

Average daylight in March /
Average sunshine in March
St. Louis, MO

Average daylight in March / Average sunshine in March - St. Louis, MO
  • Average daylight in March: 12h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in March: 6.4h

The month with the most sunshine is July (Average sunshine: 10h).
The month with the least sunshine is December (Average sunshine: 4.2h).

[Resources]

Average UV index in March
St. Louis, MO

Average UV index in March - St. Louis, MO
  • Average UV index in March: 5

Months with the highest UV index are June, July and August (UV index 9).
Months with the lowest UV index are January and December (UV index 2).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location