April weather forecast
Saint Charles, IL

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Weather in April

April is a moderate spring month in Saint Charles, Illinois, with an average temperature fluctuating between 56.1°F (13.4°C) and 40.1°F (4.5°C).

Temperature

Saint Charles's transition into April brings a rise in the average high-temperature, moving from a frosty 44.8°F (7.1°C) in March to a mild 56.1°F (13.4°C). Saint Charles's nighttime temperature in April drops to an average of 40.1°F (4.5°C).

Humidity

In April, the average relative humidity is 76%.

Rainfall

In April, the rain falls for 11.1 days. Throughout April, 0.98" (25mm) of precipitation is accumulated. In Saint Charles, during the entire year, the rain falls for 101.9 days and collects up to 8.58" (218mm) of precipitation.

Snowfall

Months with snowfall in Saint Charles are January through April, October through December. April is the last month it regularly snows in Saint Charles. During 1.2 snowfall days, in April, Saint Charles aggregates 0.67" (17mm) of snow. In Saint Charles, during the entire year, snow falls for 28.3 days and aggregates up to 3.74" (95mm) of snow.

Daylight

In April, the average length of the day is 13h and 23min.
On the first day of the month, sunrise is at 6:34 am and sunset at 7:19 pm. On the last day of April, sunrise is at 5:49 am and sunset at 7:51 pm CDT.

Sunshine

In Saint Charles, the average sunshine in April is 7.5h.

UV index

In April, the average daily maximum UV index in Saint Charles is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 3 in April transforms into the following instructions:
Heed the precautions - Suggestions to avoid sunburn are made. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are April temperatures in Saint Charles?

An average high-temperature, in April, in Saint Charles, is 56.1°F (13.4°C) and the average low-temperature is 40.1°F (4.5°C).

What is the average humidity in April in Saint Charles?

The average relative humidity in April in Saint Charles, Illinois, is 76%.

How much does it rain in Saint Charles in April?

In Saint Charles, during April, the rain falls for 11.1 days and regularly aggregates up to 0.98" (25mm) of precipitation.

What is the last month it snows in Saint Charles?

April is the last month it regularly snows in Saint Charles, Illinois. During 1.2 snowfall days, in April, Saint Charles aggregates 0.67" (17mm) of snow.

What is the average length of the day in April in Saint Charles?

In April, the average day length in Saint Charles is 13h and 23min.

When is the sunrise / sunset in April in Saint Charles?

On the first day of April in Saint Charles, sunrise is at 6:34 am and sunset at 7:19 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 7:51 pm CDT.

How long on average sun shines in April in Saint Charles?

In April, the average sunshine duration in Saint Charles, Illinois, is 7.5h.

What is the UV index intensity in April in Saint Charles?

In April, the average daily maximum UV index in Saint Charles is 3. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Saint Charles, IL

Average temperature in April - Saint Charles, IL
  • Average high temperature in April: 56.1°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (27.9°F).

  • Average low temperature in April: 40.1°F

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).

Average pressure in April
Saint Charles, IL

Average pressure in April - Saint Charles, IL
  • Average pressure in April: 29.95"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in April
Saint Charles, IL

Average wind speed in April - Saint Charles, IL
  • Average wind speed in April: 9.7mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

Average humidity in April
Saint Charles, IL

Average humidity in April - Saint Charles, IL
  • Average humidity in April: 76%

The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).

Average rainfall in April
Saint Charles, IL

Average rainfall in April - Saint Charles, IL
  • Average rainfall in April: 0.98"

The wettest month (with the highest rainfall) is May (1.26").
The driest months (with the least rainfall) are November and December (0.39").

Average rainfall days in April
Saint Charles, IL

Average rainfall days in April - Saint Charles, IL
  • Average rainfall days in April: 11.1 days

The month with the highest number of rainy days is May (12.4 days).
The month with the least rainy days is January (3.4 days).

Average snowfall in April
Saint Charles, IL

Average snowfall in April - Saint Charles, IL
  • Average snowfall in April: 0.67"

The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in April
Saint Charles, IL

Average snowfall days in April - Saint Charles, IL
  • Average snowfall days in April: 1.2 days

The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in April /
Average sunshine in April
Saint Charles, IL

Average daylight in April / Average sunshine in April - Saint Charles, IL
  • Average daylight in April: 13h and 2min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in April: 7h and 3min

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in April
Saint Charles, IL

Average sunshine days in April - Saint Charles, IL
  • Average sunshine days in April: 15.6 days

The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (13.3 days).

Average UV index in April
Saint Charles, IL

Average UV index in April - Saint Charles, IL
  • Average UV index in April: 3

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in April
Saint Charles, IL

Average cloud cover in April - Saint Charles, IL
  • Average cloud cover in April: 50

The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 32).

Average visibility in April
Saint Charles, IL

Average visibility in April - Saint Charles, IL
  • Average visibility in April: 6mi

The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).

Saint Charles, Illinois, USA

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