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
April comes with an increase, with the average high-temperature moving from an icy 38.5°F (3.6°C) in March to a frosty 48.6°F (9.2°C). In April, the average low-temperature in Grafton records at a cold 36.9°F (2.7°C) during the nights.Humidity
April, October and November, with an average relative humidity of 77%, are the least humid months.Rainfall
In April, the rain falls for 14.6 days. Throughout April, 2.52" (64mm) of precipitation is accumulated. Throughout the year, in Grafton, Wisconsin, there are 134.9 rainfall days, and 23.94" (608mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Grafton. April is the last month it regularly snows. During 2.2 snowfall days, in April, Grafton aggregates 0.87" (22mm) of snow. Throughout the year, in Grafton, Wisconsin, there are 51.1 snowfall days, and 13.66" (347mm) of snow is accumulated.Daylight
In April, the average length of the day in Grafton, Wisconsin, is 13h and 27min.On the first day of April in Grafton, sunrise is at 6:32 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 7:52 pm CDT.
Sunshine
The average sunshine in April is 7.4h.UV index
In April, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 3 during April translates into the following guidance:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
What are the temperatures in Grafton in April?
What are the least humid months in Grafton?
What is the average humidity in April in Grafton?
How many days does it rain in April in Grafton?
What is the last month it snows in Grafton?
What is the average length of the day in April in Grafton?
What time are sunrise and sunset in April in Grafton?
How many hours of sunshine does Grafton have in April?
How high is the UV index in April in Grafton?
Average temperature in April
Grafton, WI
- Average high temperature in April: 48.6°F
The warmest month (with the highest average high temperature) is July (76.1°F).
The month with the lowest average high temperature is January (25.5°F).
- Average low temperature in April: 36.9°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure in April
Grafton, WI
- Average pressure in April: 29.96"Hg
The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
Grafton, WI
- Average wind speed in April: 10.9mph
The windiest month (with the highest average wind speed) is January (12.1mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).
Average humidity in April
Grafton, WI
- Average humidity in April: 77%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April, October and November (77%).
Average rainfall in April
Grafton, WI
- Average rainfall in April: 2.52"
The wettest month (with the highest rainfall) is July (2.99").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days in April
Grafton, WI
- Average rainfall days in April: 14.6 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in April
Grafton, WI
- Average snowfall in April: 0.87"
The month with the highest snowfall is January (3.43").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Grafton, WI
- Average snowfall days in April: 2.2 days
The month with the highest number of snowfall days is January (12.8 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, WI
- 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 2min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in April
Grafton, WI
- Average sunshine days in April: 12.2 days
The month with the most sunshine days is December (16.4 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in April
Grafton, WI
- Average UV index in April: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in April
Grafton, WI
- Average cloud cover in April: 51
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in April
Grafton, WI
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Grafton, Wisconsin, USA
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