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 start of April brings a rise in the average high-temperature, moving from a frosty 46.6°F (8.1°C) in March to a refreshing 59°F (15°C). Mertztown, in April, observes a steady average low-temperature of 40.5°F (4.7°C).Humidity
The months with the lowest humidity in Mertztown, Pennsylvania, are April and July, with an average relative humidity of 76%.Rainfall
April is the month with the most rainfall. Rain falls for 16.3 days and accumulates 2.99" (76mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Mertztown, in April, snow falls for 0.5 days, with typically accumulated 0.2" (5mm) of snow. Throughout the year, in Mertztown, there are 29.4 snowfall days, and 15.87" (403mm) of snow is accumulated.Daylight
The average length of the day in April is 13h and 19min.On the first day of April in Mertztown, sunrise is at 6:44 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 7:57 pm EDT.
Sunshine
In April, the average sunshine in Mertztown is 8h.UV index
In April, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A maximum UV index of 4 in April translates into the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Frequently asked questions
What are April temperatures in Mertztown?
What are the least humid months in Mertztown?
What is the average humidity in April in Mertztown?
What is the wettest month in Mertztown?
How much does it rain in Mertztown in April?
How many days does it snow in April in Mertztown?
How many hours of daylight does Mertztown have in April?
When is the sunrise / sunset in April in Mertztown?
How many hours of sunshine does Mertztown have in April?
What is the UV index reading in April in Mertztown?
Average temperature in April
Mertztown, PA
- Average high temperature in April: 59°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in April: 40.5°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 (21.6°F).
Average pressure in April
Mertztown, PA
- Average pressure in April: 29.99"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in April
Mertztown, PA
- Average wind speed in April: 7.9mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in April
Mertztown, PA
- Average humidity in April: 76%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall in April
Mertztown, PA
- Average rainfall in April: 2.99"
The wettest month (with the highest rainfall) is April (2.99").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in April
Mertztown, PA
- Average rainfall days in April: 16.3 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in April
Mertztown, PA
- Average snowfall in April: 0.2"
The month with the highest snowfall is March (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Mertztown, PA
- Average snowfall days in April: 0.5 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Mertztown, PA
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in April: 8h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in April
Mertztown, PA
- Average sunshine days in April: 11.2 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is April (11.2 days).
Average UV index in April
Mertztown, PA
- Average UV index in April: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in April
Mertztown, PA
- Average cloud cover in April: 47
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in April
Mertztown, PA
- Average visibility in April: 6mi
The months with the highest visibility are April, June, July and November (6mi).
The months with the lowest visibility are January, February, March, May, August, September, October and December (5mi).
Mertztown, Pennsylvania, USA
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