April weather forecast
Knox, IN

Weather in April

April in Knox, Indiana, is a mild spring month, with average temperature varying between 41.9°F (5.5°C) and 57.6°F (14.2°C).

Temperature

In April, the average high-temperature increases, from a frosty 46°F (7.8°C) in March, to a mild 57.6°F (14.2°C). The average low-temperature, in Knox, is 41.9°F (5.5°C).

Humidity

In Knox, the average relative humidity in April is 76%.

Rainfall

In Knox, in April, during 17.3 rainfall days, 3.98" (101mm) of precipitation is typically accumulated. Throughout the year, in Knox, Indiana, there are 175.4 rainfall days, and 34.29" (871mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Knox are January through May, October through December. In Knox, during 1.8 snowfall days, 1.06" (27mm) of snow is typically accumulated. In Knox, Indiana, during the entire year, snow falls for 51.1 days, and aggregates up to 17.68" (449mm) of snow.

Daylight

In April, the average length of the day is 13.4h.

Sunshine

In Knox, the average sunshine is 7.6h.

UV index

In April, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 3 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in April in Knox?

In April, the average relative humidity is 76%.

How much does it rain in Knox in April?

In Knox, in April, during 17.3 rainfall days, 3.98" (101mm) of precipitation is typically accumulated.

How many days does it snow in April in Knox?

In Knox, Indiana, in April, during 1.8 snowfall days, 1.06" (27mm) of snow is typically accumulated.

How many hours of daylight does Knox have in April?

In April, the average length of the day in Knox is 13.4h.

How long on average sun shines in April in Knox?

In Knox, Indiana, the average sunshine in April is 7.6h.

What is the UV index intensity in April in Knox?

In April, the average daily maximum UV index in Knox is 3. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to the UV radiation.

Average temperature in April
Knox, IN

Average temperature in April - Knox, IN
  • Average high temperature in April: 57.6°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (29.8°F).

  • Average low temperature in April: 41.9°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

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Average pressure in April
Knox, IN

Average pressure in April - Knox, IN
  • Average pressure in April: 29.95"

Months with the highest atmospheric pressure are January and November (30.11").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in April
Knox, IN

Average wind speed in April - Knox, IN
  • Average wind speed in April: 9.9mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

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Average humidity in April
Knox, IN

Average humidity in April - Knox, IN
  • Average humidity in April: 76%

Months with the highest relative humidity are January, February and July (84%).
The month with the lowest relative humidity is October (74%).

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Average rainfall in April
Knox, IN

Average rainfall in April - Knox, IN
  • Average rainfall in April: 3.98"

The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is January (1.85").

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Average rainfall days in April
Knox, IN

Average rainfall days in April - Knox, IN
  • Average rainfall days in April: 17.3 days

The month with the highest number of rainy days is May (20.7 days).
The month with the least rainy days is January (7.9 days).

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Average snowfall in April
Knox, IN

Average snowfall in April - Knox, IN
  • Average snowfall in April: 1.06"

The month with the highest snowfall is February (5.04").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in April
Knox, IN

Average snowfall days in April - Knox, IN
  • Average snowfall days in April: 1.8 days

The month with the highest number of snowfall days is January (15.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in April /
Average sunshine in April
Knox, IN

Average daylight in April / Average sunshine in April - Knox, IN
  • Average daylight in April: 13.4h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in April: 7.6h

The month with the most sunshine is July (Average sunshine: 9.9h).
The month with the least sunshine is January (Average sunshine: 3.4h).

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Average sunshine days in April
Knox, IN

Average sunshine days in April - Knox, IN
  • Average sunshine days in April: 9.4 days

The month with the most sunshine days is November (14.6 days).
The month with the least sunshine days is June (7.8 days).

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Average UV index in April
Knox, IN

Average UV index in April - Knox, IN
  • Average UV index in April: 3

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

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Average cloud cover in April
Knox, IN

Average cloud cover in April - Knox, IN
  • Average cloud cover in April: 49

The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in April
Knox, IN

Average visibility in April - Knox, IN
  • Average visibility in April: 6mi

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

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