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 average high-temperature increases in April, moving from a frosty 46.9°F (8.3°C) in March to a moderate 59.5°F (15.3°C). Harrow's average low-temperature in April is measured at a wintry 41.4°F (5.2°C).Humidity
The months with the lowest humidity are April and July, with an average relative humidity of 76%.Rainfall
In Harrow, in April, it is raining for 8.9 days, with typically 0.55" (14mm) of accumulated precipitation. Throughout the year, there are 91.3 rainfall days, and 7.28" (185mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, November and December. In Harrow, in April, snow falls for 0.3 days, with typically accumulated 0.04" (1mm) of snow. In Harrow, during the entire year, snow falls for 14.8 days and aggregates up to 2.24" (57mm) of snow.Daylight
In April, the average length of the day is 13h and 19min.On the first day of April, sunrise is at 6:42 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 7:55 pm EDT.
Sunshine
In April, the average sunshine in Harrow is 8h.UV index
In Harrow, Pennsylvania, the average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In April, the UV index of 4 transforms into the following advice:
Act with care - The need to guard against sun damage is communicated. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are April temperatures in Harrow?
What are the least humid months in Harrow?
What is the average humidity in April in Harrow?
How many days does it rain in April in Harrow?
How much does it snow in Harrow in April?
What is the average length of the day in April in Harrow?
What time are sunrise and sunset in April in Harrow?
How many hours of sunshine does Harrow have in April?
How high is the UV index in April in Harrow?
Average temperature in April
Harrow, PA
- Average high temperature in April: 59.5°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 (34.9°F).
- Average low temperature in April: 41.4°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in April
Harrow, PA
- Average pressure in April: 29.98"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
Harrow, PA
- Average wind speed in April: 8mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in April
Harrow, PA
- Average humidity in April: 76%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall in April
Harrow, PA
- Average rainfall in April: 0.55"
The wettest month (with the highest rainfall) is July (0.91").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days in April
Harrow, PA
- Average rainfall days in April: 8.9 days
The months with the highest number of rainy days are June and July (10.2 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in April
Harrow, PA
- Average snowfall in April: 0.04"
The month with the highest snowfall is March (0.63").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in April
Harrow, PA
- Average snowfall days in April: 0.3 days
The month with the highest number of snowfall days is February (4.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Harrow, 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 30min).
Average sunshine days in April
Harrow, PA
- Average sunshine days in April: 19.9 days
The month with the most sunshine days is January (23.8 days).
The month with the least sunshine days is June (16.7 days).
Average UV index in April
Harrow, 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
Harrow, PA
- Average cloud cover in April: 46
The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in April
Harrow, PA
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, November and December (6mi).
The months with the lowest visibility are May, June, July, August, September and October (5mi).
Harrow, Pennsylvania, USA
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