Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
The transition from March to April brings a temperature rise, with average high-temperatures increasing from a chilly 45.9°F (7.7°C) to a moderate 58.6°F (14.8°C). During the nights in April, the temperature averages to an icy 41.9°F (5.5°C).Humidity
In Griffen, the average relative humidity in April is 71%.Rainfall
In Griffen, in April, during 13.3 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. Throughout the year, there are 123.3 rainfall days, and 20.98" (533mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Griffen, during April, snow falls for 1.5 days and regularly aggregates up to 0.71" (18mm) of snow. Throughout the year, there are 39.9 snowfall days, and 10.91" (277mm) of snow is accumulated.Daylight
In April, the average length of the day is 13h and 23min.On the first day of April, sunrise is at 6:56 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 8:13 pm CDT.
Sunshine
In April, the average sunshine is 7.8h.UV index
In Griffen, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In April, the maximum UV index of 3 suggests this advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April?
What is the average humidity in April in Griffen?
How many days does it rain in April?
How many days does it snow in April?
What is the average length of the day in April?
What time are sunrise and sunset in April?
How long on average sun shines in April?
What is the UV index intensity in April?
Average temperature in April
Griffen, IA
- Average high temperature in April: 58.6°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (26.4°F).
- Average low temperature in April: 41.9°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure in April
Griffen, IA
- Average pressure in April: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in April
Griffen, IA
- Average wind speed in April: 10.7mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in April
Griffen, IA
- Average humidity in April: 71%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (69%).
Average rainfall in April
Griffen, IA
- Average rainfall in April: 2.05"
The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in April
Griffen, IA
- Average rainfall days in April: 13.3 days
The month with the highest number of rainy days is June (17.4 days).
The month with the least rainy days is February (3.2 days).
Average snowfall in April
Griffen, IA
- Average snowfall in April: 0.71"
The month with the highest snowfall is February (3.07").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Griffen, IA
- Average snowfall days in April: 1.5 days
The month with the highest number of snowfall days is January (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Griffen, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in April
Griffen, IA
- Average sunshine days in April: 13.7 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in April
Griffen, IA
- 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, February, October, November and December (UV index 2).
Average cloud cover in April
Griffen, IA
- Average cloud cover in April: 46
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in April
Griffen, IA
- 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).
Griffen, Iowa, USA
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