St. Louis
Missouri, USA
Long-term weather forecast
Long-term weather forecast

April weather forecast and climate
St. Louis, MO

A beautiful twilight view of the Gateway Arch in St. Louis, Missouri, with a distant view of the city buildings mirrored in the waterfront
A beautiful twilight view of the Gateway Arch in St. Louis, Missouri, with a distant view of the city buildings mirrored in the waterfront
Abril is an enjoyable spring month in St. Louis, with temperature in the range of an average low of 47.1°F (8.4°C) and an average high of 67.5°F (19.7°C).

Temperature

In Abril, the average high-temperature in St. Louis rises, from a moderate 55.9°F (13.3°C) in Marzo, to a comfortable 67.5°F (19.7°C). In Abril, in St. Louis, the average low-temperature is 47.1°F (8.4°C).

Humidity

The least humid month in St. Louis, Missouri, is Abril, with an average relative humidity of 63.5%.

Rainfall

In St. Louis, it is raining for 11.3 days, with typically 3.69" (93.7mm) of accumulated precipitation. Throughout the year, in St. Louis, there are 112.6 rainfall days, and 40.96" (1040.3mm) of precipitation is accumulated.

Snowfall

Enero through Abril, Noviembre and Diciembre are months with snowfall in St. Louis. Abril is the last month it regularly snows in St. Louis. During 0.3 snowfall days, in Abril, St. Louis aggregates 0.4" (10.2mm) of snow. Throughout the year, in St. Louis, there are 14.5 snowfall days, and 17.7" (449.6mm) of snow is accumulated.

Daylight

The average length of the day in Abril in St. Louis is 13.2h.

Sunshine

The average sunshine in St. Louis is 7.5h.

UV index

In Abril, the average daily maximum UV index in St. Louis is 7. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 7 transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in Abril in St. Louis?

In Abril, in St. Louis, the average high-temperature is 67.5°F (19.7°C), and the average low-temperature is 47.1°F (8.4°C).

What is the least humid month in St. Louis?

With an average relative humidity of 63.5%, Abril is the least humid month in St. Louis, Missouri.

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

The average relative humidity in Abril in St. Louis, Missouri, is 63.5%.

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

In Abril, in St. Louis, the rain falls for 11.3 days. Throughout Abril, 3.69" (93.7mm) of precipitation is accumulated.

What is the last month it snows in St. Louis?

Abril is the last month it regularly snows in St. Louis, Missouri. During 0.3 snowfall days, in Abril, St. Louis aggregates 0.4" (10.2mm) of snow.

How many hours of daylight does St. Louis have in Abril?

In St. Louis, the average length of the day in Abril is 13.2h.

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

The average sunshine in Abril is 7.5h.

How high is the UV index in Abril in St. Louis?

The average daily maximum UV index in Abril is 7. A UV Index value of 6 to 7 symbolizes a high health threat from the exposure to the Sun's UV radiation.
Average temperature in April - St. Louis, MO
  • Average high temperature in April: 67.4°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 April: 47.2°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 April - St. Louis, MO
  • Average humidity in April: 63.5%

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 April - St. Louis, MO
  • Average rainfall in April: 3.7"

The wettest month (with the highest rainfall) is May (4.7").
The driest month (with the lowest rainfall) is February (2.2").

Average rainfall days in April - St. Louis, MO
  • Average rainfall days in April: 11.3 days

The month with the highest number of rainy days is May (11.9 days).
The month with the lowest number of rainy days is September (7.4 days).

Average snowfall in April - St. Louis, MO
  • Average snowfall in April: 0.4"

The month with the highest snowfall is January (5.6").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average snowfall days in April - St. Louis, MO
  • Average snowfall days in April: 0.3 days

The month with the highest number of snowfall days is January (4.7 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in April / Average sunshine in April - St. Louis, MO
  • Average daylight in April: 13.2h

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

  • Average sunshine in April: 7.5h

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

Average UV index in April - St. Louis, MO
  • Average UV index in April: 7

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).