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
As April arrives, Rockville's weather shows an increase in high-temperatures, moving from March's refreshing 55.9°F (13.3°C) to a pleasant 68.2°F (20.1°C). During April, Rockville's temperature averages to a chilly 49.1°F (9.5°C) at night.Humidity
In April, the average relative humidity is 72%.Rainfall
In April, the rain falls for 15 days. Throughout April, 2.36" (60mm) of precipitation is accumulated. In Rockville, during the entire year, the rain falls for 151.1 days and collects up to 26.22" (666mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. April is the last month it regularly snows. During 0.3 snowfall days, in April, Rockville aggregates 0.16" (4mm) of snow. In Rockville, during the entire year, snow falls for 10.5 days and aggregates up to 6.42" (163mm) of snow.Daylight
In Rockville, the average length of the day in April is 13h and 12min.On the first day of April in Rockville, sunrise is at 6:54 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 8:00 pm EDT.
Sunshine
The average sunshine in April is 9.1h.UV index
The average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high UV index of 4 in April translates into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are April temperatures?
What is the average humidity in April?
How much does it rain in April?
What is the last month it snows?
What is the average length of the day in April?
What time are sunrise and sunset in April?
How many hours of sunshine does Rockville have in April?
What is the UV index reading in April?
Average temperature in April
Rockville, VA
- Average high temperature in April: 68.2°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (44.2°F).
- Average low temperature in April: 49.1°F
The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).
Average pressure in April
Rockville, VA
- Average pressure in April: 30"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in April
Rockville, VA
- Average wind speed in April: 7.4mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in April
Rockville, VA
- Average humidity in April: 72%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (68%).
Average rainfall in April
Rockville, VA
- Average rainfall in April: 2.36"
The wettest month (with the highest rainfall) is August (2.72").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in April
Rockville, VA
- Average rainfall days in April: 15 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in April
Rockville, VA
- Average snowfall in April: 0.16"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Rockville, VA
- Average snowfall days in April: 0.3 days
The month with the highest number of snowfall days is February (3.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Rockville, VA
- Average daylight in April: 13h and 1min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in April: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in April
Rockville, VA
- Average sunshine days in April: 13.7 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (11.9 days).
Average UV index in April
Rockville, VA
- Average UV index in April: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in April
Rockville, VA
- Average cloud cover in April: 40
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in April
Rockville, VA
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Rockville, Virginia, USA
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