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 witnesses an increase in the average high-temperature, moving from a chilly 46.6°F (8.1°C) in March to a moderate 58.6°F (14.8°C). During the nights in April, Williamstown observes an average low-temperature of 41.7°F (5.4°C).Humidity
In April, the average relative humidity is 76%.Rainfall
In Williamstown, in April, during 16.8 rainfall days, 2.99" (76mm) of precipitation is typically accumulated. Throughout the year, in Williamstown, there are 168.7 rainfall days, and 29.72" (755mm) of precipitation is accumulated.Snowfall
Months with snowfall in Williamstown are January through May, October through December. In Williamstown, in April, snow falls for 1.8 days, with typically accumulated 0.51" (13mm) of snow. Throughout the year, there are 48.9 snowfall days, and 13.23" (336mm) of snow is accumulated.Daylight
In Williamstown, the average length of the day in April is 13h and 20min.On the first day of April in Williamstown, sunrise is at 7:16 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 6:33 am and sunset at 8:30 pm EDT.
Sunshine
In April, the average sunshine is 7.3h.UV index
The average daily maximum UV index in April is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In April, a regular UV index of 4 translates into these guidelines:
Act with care - The need to guard against sun damage is communicated. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Frequently asked questions
What is the average April temperature in Williamstown?
What is the average humidity in April in Williamstown?
How much does it rain in Williamstown in April?
How many days does it snow in April in Williamstown?
How many hours of daylight does Williamstown have in April?
When are sunrise and sunset in April in Williamstown?
How long on average sun shines in April in Williamstown?
What is the UV index reading in April in Williamstown?
Average temperature in April
Williamstown, OH
- Average high temperature in April: 58.6°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 (31.1°F).
- Average low temperature in April: 41.7°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in April
Williamstown, OH
- Average pressure in April: 29.96"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Williamstown, OH
- Average wind speed in April: 9.9mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in April
Williamstown, OH
- Average humidity in April: 76%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in April
Williamstown, OH
- Average rainfall in April: 2.99"
The wettest month (with the highest rainfall) is June (3.54").
The driest month (with the least rainfall) is December (1.81").
Average rainfall days in April
Williamstown, OH
- Average rainfall days in April: 16.8 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in April
Williamstown, OH
- Average snowfall in April: 0.51"
The month with the highest snowfall is February (3.74").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Williamstown, OH
- Average snowfall days in April: 1.8 days
The month with the highest number of snowfall days is January (13.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Williamstown, OH
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in April: 7h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in April
Williamstown, OH
- Average sunshine days in April: 10.9 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is June (9.3 days).
Average UV index in April
Williamstown, OH
- Average UV index in April: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in April
Williamstown, OH
- Average cloud cover in April: 48
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in April
Williamstown, OH
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are January, February, August and September (5mi).
Williamstown, Ohio, USA
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