April weather forecast
Henderson, IL

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Weather in April

April is a moderate spring month in Henderson, Illinois, with temperature in the range of an average low of 43.2°F (6.2°C) and an average high of 59.9°F (15.5°C).

Temperature

April's arrival sees a rise in the average high-temperature, jumping from March's frosty 48°F (8.9°C) to a mild 59.9°F (15.5°C). Throughout the month of April, Henderson witnesses an average temperature of 43.2°F (6.2°C).

Humidity

In April, the average relative humidity in Henderson is 75%.

Rainfall

In April, in Henderson, Illinois, the rain falls for 11.8 days. Throughout April, 1.3" (33mm) of precipitation is accumulated. Throughout the year, in Henderson, there are 109.9 rainfall days, and 11.14" (283mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Henderson are January through April, October through December. April is the last month it regularly snows in Henderson. During 0.9 snowfall days, in April, Henderson aggregates 0.75" (19mm) of snow. In Henderson, Illinois, during the entire year, snow falls for 28 days and aggregates up to 4.53" (115mm) of snow.

Daylight

The average length of the day in April is 13h and 20min.
On the first day of the month, sunrise is at 6:43 am and sunset at 7:26 pm. On the last day of April, sunrise is at 5:59 am and sunset at 7:57 pm CDT.

Sunshine

The average sunshine in April in Henderson is 7.9h.

UV index

In April, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 4 in April interprets into the following advice:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
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Frequently asked questions

What is the usual temperature for Henderson in April?

Henderson in April has an average high-temperature of 59.9°F (15.5°C) and an average low-temperature of 43.2°F (6.2°C).

What is the average humidity in April in Henderson?

In Henderson, the average relative humidity in April is 75%.

How many days does it rain in April in Henderson?

In Henderson, during April, the rain falls for 11.8 days and regularly aggregates up to 1.3" (33mm) of precipitation.

What is the last month it snows in Henderson?

April is the last month it regularly snows in Henderson, Illinois. During 0.9 snowfall days, in April, Henderson aggregates 0.75" (19mm) of snow.

How many hours of daylight does Henderson have in April?

In Henderson, Illinois, the average day length in April is 13h and 20min.

When is the sunrise / sunset in April in Henderson?

In April, on the first day of the month, sunrise is at 6:43 am and sunset at 7:26 pm. On the last day of the month, in Henderson, sunrise is at 5:59 am and sunset at 7:57 pm CDT.

How many hours of sunshine does Henderson have in April?

In Henderson, Illinois, the average sunshine duration in April is 7.9h.

What is the UV index intensity in April in Henderson?

In April, the average daily maximum UV index in Henderson is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from 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
Henderson, IL

Average temperature in April - Henderson, IL
  • Average high temperature in April: 59.9°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.5°F).

  • Average low temperature in April: 43.2°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).

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Average pressure in April
Henderson, IL

Average pressure in April - Henderson, IL
  • Average pressure in April: 29.93"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in April
Henderson, IL

Average wind speed in April - Henderson, IL
  • Average wind speed in April: 10.8mph

The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

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Average humidity in April
Henderson, IL

Average humidity in April - Henderson, IL
  • Average humidity in April: 75%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in April
Henderson, IL

Average rainfall in April - Henderson, IL
  • Average rainfall in April: 1.3"

The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are January and December (0.47").

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Average rainfall days in April
Henderson, IL

Average rainfall days in April - Henderson, IL
  • Average rainfall days in April: 11.8 days

The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is February (3.9 days).

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Average snowfall in April
Henderson, IL

Average snowfall in April - Henderson, IL
  • Average snowfall in April: 0.75"

The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in April
Henderson, IL

Average snowfall days in April - Henderson, IL
  • Average snowfall days in April: 0.9 days

The month with the highest number of snowfall days is January (8.8 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
Henderson, IL

Average daylight in April / Average sunshine in April - Henderson, 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: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days in April
Henderson, IL

Average sunshine days in April - Henderson, IL
  • Average sunshine days in April: 16.3 days

The month with the most sunshine days is December (21.6 days).
The month with the least sunshine days is June (12.4 days).

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Average UV index in April
Henderson, IL

Average UV index in April - Henderson, IL
  • Average UV index in April: 4

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

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Average cloud cover in April
Henderson, IL

Average cloud cover in April - Henderson, IL
  • Average cloud cover in April: 47

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).

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Average visibility in April
Henderson, IL

Average visibility in April - Henderson, 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).

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Henderson, Illinois, USA

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