May weather forecastKeller, VA
May
Weather in May
The last month of the spring, May, is an enjoyable month in Keller, Virginia, with temperature in the range of an average high of 67.8°F (19.9°C) and an average low of 61.3°F (16.3°C).Temperature
May witnesses a subtle temperature ascent, adjusting from a moderate 58.8°F (14.9°C) in April to a comfortable 67.8°F (19.9°C). During May, Keller's temperature shows a minor deviation from daytime highs, falling to a steady low-temperature average of 61.3°F (16.3°C).Humidity
With an average relative humidity of 80%, May is the most humid month.Rainfall
In May, the rain falls for 15.3 days. Throughout May, 2.17" (55mm) of precipitation is accumulated. In Keller, during the entire year, the rain falls for 161.5 days and collects up to 26.06" (662mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in May is 14h and 13min.On the first day of the month, sunrise is at 6:06 am and sunset at 7:53 pm. On the last day of May, sunrise is at 5:43 am and sunset at 8:18 pm EDT.
Sunshine
In May, the average sunshine is 9.8h.UV index
In Keller, the average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in May converts into the following recommendations:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Keller, VA
- Average high temperature in May: 67.8°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (43.5°F).
- Average low temperature in May: 61.3°F
The month with the highest average low temperature is July (75.9°F).
The coldest month (with the lowest average low temperature) is January (35.6°F).
Average pressure in May
Keller, VA
- Average pressure in May: 30.03"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in May
Keller, VA
- Average wind speed in May: 11.3mph
The windiest month (with the highest average wind speed) is January (13.4mph).
The calmest month (with the lowest average wind speed) is August (9.5mph).
Average humidity in May
Keller, VA
- Average humidity in May: 80%
The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in May
Keller, VA
- Average rainfall in May: 2.17"
The wettest month (with the highest rainfall) is August (3.27").
The driest month (with the least rainfall) is November (1.54").
Average rainfall days in May
Keller, VA
- Average rainfall days in May: 15.3 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in May
Keller, VA
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.51").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in May
Keller, VA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Keller, VA
- Average daylight in May: 14h and 12min
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 May: 9h and 48min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in May
Keller, VA
- Average sunshine days in May: 13.6 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in May
Keller, VA
- Average UV index in May: 6
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in May
Keller, VA
- Average cloud cover in May: 35
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in May
Keller, VA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
