April weather forecast
Green Island, IA

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Weather in April

April is a moderate spring month in Green Island, Iowa, with an average temperature varying between 39.7°F (4.3°C) and 56.1°F (13.4°C).

Temperature

Noticing a change, the average high-temperature during April moves from March's chilly 44.2°F (6.8°C) to a refreshing 56.1°F (13.4°C). In the month of April, the average temperature dips to an icy 39.7°F (4.3°C) during the night.

Humidity

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

Rainfall

In Green Island, during April, the rain falls for 16.3 days and regularly aggregates up to 3.39" (86mm) of precipitation. Throughout the year, there are 145.6 rainfall days, and 28.9" (734mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. April is the last month it regularly snows. During 1.6 snowfall days, in April, Green Island aggregates 0.67" (17mm) of snow. Throughout the year, in Green Island, Iowa, there are 40.1 snowfall days, and 16.61" (422mm) of snow is accumulated.

Daylight

In Green Island, the average length of the day in April is 13h and 23min.
On the first day of the month, sunrise is at 6:42 am and sunset at 7:27 pm. On the last day of April, sunrise is at 5:57 am and sunset at 7:59 pm CDT.

Sunshine

The average sunshine in April is 7.5h.

UV index

In April, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 4 during April translates into the following guidance:
Make use of precautions - It is urged to ward off sun damage. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Updated: Jul 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are April temperatures?

April temperatures vary between a high-temperature of 56.1°F (13.4°C) and a low-temperature of 39.7°F (4.3°C).

What is the average humidity in April?

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

How much does it rain in Green Island in April?

In Green Island, in April, it is raining for 16.3 days, with typically 3.39" (86mm) of accumulated precipitation.

What is the last month it snows?

April is the last month it regularly snows. During 1.6 snowfall days, in April, Green Island aggregates 0.67" (17mm) of snow.

What is the average length of the day in April in Green Island?

In Green Island, Iowa, the average day length in April is 13h and 23min.

When are sunrise and sunset in April?

In April, on the first day of the month, sunrise is at 6:42 am and sunset at 7:27 pm. On the last day of the month, in Green Island, sunrise is at 5:57 am and sunset at 7:59 pm CDT.

How long on average sun shines in April?

In April, the average sunshine duration is 7.5h.

How high is the UV index in April?

The average daily maximum UV index in April in Green Island is 4. A UV Index reading of 3 to 5 represents 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
Green Island, IA

Average temperature in April - Green Island, IA
  • Average high temperature in April: 56.1°F

The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (25.7°F).

  • Average low temperature in April: 39.7°F

The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).

Average pressure in April
Green Island, IA

Average pressure in April - Green Island, IA
  • 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 (29.9"Hg).

Average wind speed in April
Green Island, IA

Average wind speed in April - Green Island, IA
  • Average wind speed in April: 10.3mph

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

Average humidity in April
Green Island, IA

Average humidity in April - Green Island, IA
  • Average humidity in April: 76%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (75%).

Average rainfall in April
Green Island, IA

Average rainfall in April - Green Island, IA
  • Average rainfall in April: 3.39"

The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the least rainfall) is January (1.22").

Average rainfall days in April
Green Island, IA

Average rainfall days in April - Green Island, IA
  • Average rainfall days in April: 16.3 days

The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is February (4.5 days).

Average snowfall in April
Green Island, IA

Average snowfall in April - Green Island, IA
  • Average snowfall in April: 0.67"

The month with the highest snowfall is January (4.61").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in April
Green Island, IA

Average snowfall days in April - Green Island, IA
  • Average snowfall days in April: 1.6 days

The month with the highest number of snowfall days is January (10.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in April /
Average sunshine in April
Green Island, IA

Average daylight in April / Average sunshine in April - Green Island, IA
  • 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
Green Island, IA

Average sunshine days in April - Green Island, IA
  • Average sunshine days in April: 10.6 days

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (9.5 days).

Average UV index in April
Green Island, IA

Average UV index in April - Green Island, IA
  • Average UV index in April: 4

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

Average cloud cover in April
Green Island, IA

Average cloud cover in April - Green Island, IA
  • Average cloud cover in April: 49

The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 32).

Average visibility in April
Green Island, IA

Average visibility in April - Green Island, IA
  • Average visibility in April: 6mi

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

Green Island, Iowa, USA

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