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
With the onset of April, Grafton's weather sees a temperature rise, transitioning from a cold 40.6°F (4.8°C) in March to a cool 54.3°F (12.4°C). Grafton's temperature in April lowers to a consistent average of 38.7°F (3.7°C) during the nights.Humidity
The months with the lowest humidity are April and October, with an average relative humidity of 72%.Rainfall
In Grafton, in April, it is raining for 14.9 days, with typically 2.6" (66mm) of accumulated precipitation. In Grafton, during the entire year, the rain falls for 134.3 days and collects up to 25.08" (637mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Grafton, during April, snow falls for 3.3 days and regularly aggregates up to 2.48" (63mm) of snow. Throughout the year, there are 57 snowfall days, and 22.83" (580mm) of snow is accumulated.Daylight
The average length of the day in April is 13h and 27min.On the first day of April, sunrise is at 6:52 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 6:05 am and sunset at 8:13 pm CDT.
Sunshine
The average sunshine in April is 7.5h.UV index
In Grafton, Iowa, the average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: In April, a regular UV index of 3 translates into these guidelines:
Adopt protective measures - It is advised to guard against sun damage. When the Sun is at its strongest around midday, find shade and limit exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature?
What are the least humid months?
What is the average humidity in April in Grafton?
How much does it rain in April?
How much does it snow in April?
How many hours of daylight does Grafton have in April?
What time are sunrise and sunset in April?
How long on average sun shines in April?
How high is the UV index in April in Grafton?
Average temperature in April
Grafton, IA
- Average high temperature in April: 54.3°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (21.6°F).
- Average low temperature in April: 38.7°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9°F).
Average pressure in April
Grafton, IA
- Average pressure in April: 29.94"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in April
Grafton, IA
- 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 (7.4mph).
Average humidity in April
Grafton, IA
- Average humidity in April: 72%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and October (72%).
Average rainfall in April
Grafton, IA
- Average rainfall in April: 2.6"
The wettest month (with the highest rainfall) is June (4.13").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in April
Grafton, IA
- Average rainfall days in April: 14.9 days
The month with the highest number of rainy days is June (18.4 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in April
Grafton, IA
- Average snowfall in April: 2.48"
The month with the highest snowfall is February (5.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Grafton, IA
- Average snowfall days in April: 3.3 days
The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Grafton, IA
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in April: 7h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in April
Grafton, IA
- Average sunshine days in April: 11.9 days
The month with the most sunshine days is October (18.1 days).
The month with the least sunshine days is June (9.1 days).
Average UV index in April
Grafton, 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, November and December (UV index 1).
Average cloud cover in April
Grafton, IA
- 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 32).
Average visibility in April
Grafton, IA
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, September, October and November (6mi).
The months with the lowest visibility are January, February, July, August and December (5mi).
Grafton, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location