April weather forecast
Tonica, IL

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Weather in April

April in Tonica, Illinois, is a moderate spring month, with an average temperature varying between 58.8°F (14.9°C) and 42.4°F (5.8°C).

Temperature

April's arrival signals a temperature shift, moving from a frosty 46.8°F (8.2°C) in March to a refreshing 58.8°F (14.9°C). The low-temperature average for Tonica during April stands at a wintry 42.4°F (5.8°C).

Humidity

The average relative humidity in April is 74%.

Rainfall

In Tonica, during April, the rain falls for 16.7 days and regularly aggregates up to 3.78" (96mm) of precipitation. Throughout the year, in Tonica, there are 151.4 rainfall days, and 30.67" (779mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. April is the last month it regularly snows in Tonica. During 1.8 snowfall days, in April, Tonica aggregates 1.61" (41mm) of snow. In Tonica, Illinois, during the entire year, snow falls for 40.5 days and aggregates up to 15.16" (385mm) of snow.

Daylight

The average length of the day in April in Tonica is 13h and 21min.
On the first day of April in Tonica, Illinois, sunrise is at 6:37 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 7:52 pm CDT.

Sunshine

The average sunshine in April is 7.8h.

UV index

The average daily maximum UV index in April in Tonica, Illinois, is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index of 3 during April translates into these guidelines:
Be vigilant - Preventing sunburn is recommended. Avoiding the Sun during its peak radiation time around midday is a healthy practice. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
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Frequently asked questions

What are April temperatures in Tonica?

The average high-temperature and low-temperature in Tonica during April are 58.8°F (14.9°C) and 42.4°F (5.8°C) respectively.

What is the average humidity in April in Tonica?

The average relative humidity in April in Tonica, Illinois, is 74%.

How much does it rain in Tonica in April?

In Tonica, in April, during 16.7 rainfall days, 3.78" (96mm) of precipitation is typically accumulated.

What is the last month it snows in Tonica?

April is the last month it regularly snows in Tonica, Illinois. During 1.8 snowfall days, in April, Tonica aggregates 1.61" (41mm) of snow.

How many hours of daylight does Tonica have in April?

In Tonica, Illinois, the average day length in April is 13h and 21min.

When is the sunrise / sunset in April in Tonica?

In April, on the first day of the month, sunrise is at 6:37 am and sunset at 7:21 pm. On the last day of the month, in Tonica, sunrise is at 5:53 am and sunset at 7:52 pm CDT.

How long on average sun shines in April in Tonica?

In April, the average sunshine duration is 7.8h.

What is the UV index reading in April in Tonica?

In Tonica, Illinois, the average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
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
Tonica, IL

Average temperature in April - Tonica, IL
  • Average high temperature in April: 58.8°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (28.9°F).

  • Average low temperature in April: 42.4°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 (16.9°F).

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Average pressure in April
Tonica, IL

Average pressure in April - Tonica, IL
  • Average pressure in April: 29.94"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in April
Tonica, IL

Average wind speed in April - Tonica, IL
  • Average wind speed in April: 10.3mph

The windiest months (with the highest average wind speed) are January and April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

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Average humidity in April
Tonica, IL

Average humidity in April - Tonica, IL
  • Average humidity in April: 74%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in April
Tonica, IL

Average rainfall in April - Tonica, IL
  • Average rainfall in April: 3.78"

The wettest month (with the highest rainfall) is May (4.65").
The driest month (with the least rainfall) is February (1.57").

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Average rainfall days in April
Tonica, IL

Average rainfall days in April - Tonica, IL
  • Average rainfall days in April: 16.7 days

The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is January (5.5 days).

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Average snowfall in April
Tonica, IL

Average snowfall in April - Tonica, IL
  • Average snowfall in April: 1.61"

The month with the highest snowfall is January (4.37").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in April
Tonica, IL

Average snowfall days in April - Tonica, IL
  • Average snowfall days in April: 1.8 days

The month with the highest number of snowfall days is January (12.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in April /
Average sunshine in April
Tonica, IL

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

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in April: 7h and 5min

The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in April
Tonica, IL

Average sunshine days in April - Tonica, IL
  • Average sunshine days in April: 10.8 days

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (10.4 days).

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Average UV index in April
Tonica, IL

Average UV index in April - Tonica, IL
  • Average UV index in April: 3

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

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Average cloud cover in April
Tonica, IL

Average cloud cover in April - Tonica, IL
  • Average cloud cover in April: 48

The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).

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Average visibility in April
Tonica, IL

Average visibility in April - Tonica, IL
  • Average visibility in April: 6mi

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

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Tonica, Illinois, USA

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