June weather forecastRockville, MD
June
Weather in June
The pinnacle of summer in Rockville, June showcases a rise in temperatures, peaking at 82°F (27.8°C) and settling at 63.7°F (17.6°C). Notably, the length of daylight peaks at nearly 15 hours, maximizing opportunities for summer activities. The pleasant sunny days are here to stay, although the city is not a stranger to rainfall during this month. Humidity is relatively constant as compared to May, while the wind speed drops, adding to the prevalent summer vibes.Temperature
The shift into June is accompanied by a modest temperature increase, with the average high-temperature edging up from a warm 73.9°F (23.3°C) in May to a still moderately hot 82°F (27.8°C). Rockville experiences an average low-temperature reading of 63.7°F (17.6°C) throughout June.Heat index
June's heat index is calculated to be a hot 87.8°F (31°C). Ongoing activity coupled with exposure often results in weariness and could induce heat cramps.When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
Humidity
The average relative humidity in June is 73%.Rainfall
In Rockville, in June, during 15.9 rainfall days, 2.48" (63mm) of precipitation is typically accumulated. Throughout the year, there are 156.4 rainfall days, and 30.79" (782mm) of precipitation is accumulated.Snowfall
In Rockville, snow does not fall in May through October.Daylight
June has the longest days of the year, with an average of 14h and 54min of daylight.On the first day of the month, sunrise is at 5:44 am and sunset at 8:28 pm. On the last day of June, sunrise is at 5:46 am and sunset at 8:38 pm EDT.
Sunshine
In June, the average sunshine is 10.2h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index in Rockville. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 6 during June translates into the following directions:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in June
Rockville, MD
- Average high temperature in June: 82°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in June: 63.7°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in June
Rockville, MD
- Average pressure in June: 29.95"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 June
Rockville, MD
- Average wind speed in June: 5.8mph
The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in June
Rockville, MD
- Average humidity in June: 73%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (70%).
Average rainfall in June
Rockville, MD
- Average rainfall in June: 2.48"
The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is January (1.97").
Average rainfall days in June
Rockville, MD
- Average rainfall days in June: 15.9 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is November (9.2 days).
Average snowfall in June
Rockville, MD
- Average snowfall in June: 0"
The month with the highest snowfall is March (3.03").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in June
Rockville, MD
- Average snowfall days in June: 0 days
The months with the highest number of snowfall days are January and February (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in June /
Average sunshine in June
Rockville, MD
- Average daylight in June: 14h and 54min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in June: 10h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 6min).
Average sunshine days in June
Rockville, MD
- Average sunshine days in June: 12.4 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (12 days).
Average UV index in June
Rockville, MD
- Average UV index in June: 6
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in June
Rockville, MD
- Average cloud cover in June: 33
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in June
Rockville, MD
- Average visibility in June: 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).
