May weather forecastMarietta, PA
May
Weather in May
May, the last month of the spring in Marietta, is an agreeable month, with an average temperature fluctuating between 52.5°F (11.4°C) and 70.2°F (21.2°C).Temperature
Marietta's weather shows a temperature rise with the arrival of May, moving from a moderate 60.6°F (15.9°C) in April to a pleasant 70.2°F (21.2°C). The temperature dips to an average of 52.5°F (11.4°C) during May nights.Humidity
The most humid month is May, with an average relative humidity of 81%.Rainfall
In May, the rain falls for 15.2 days. Throughout May, 1.69" (43mm) of precipitation is accumulated. In Marietta, during the entire year, the rain falls for 130.2 days and collects up to 16.22" (412mm) of precipitation.Snowfall
In Marietta, snow does not fall in May through October.Daylight
In May, the average length of the day is 14h and 25min.On the first day of May, sunrise is at 6:05 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 8:28 pm EDT.
Sunshine
In May, the average sunshine is 8.2h.UV index
May through July, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.Note: In May, an average UV index of 6 transforms into the following instructions:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Marietta, PA
- Average high temperature in May: 70.2°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in May: 52.5°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).
Average pressure in May
Marietta, PA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in May
Marietta, PA
- Average wind speed in May: 6.8mph
The windiest months (with the highest average wind speed) are February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in May
Marietta, PA
- Average humidity in May: 81%
The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are March and April (76%).
Average rainfall in May
Marietta, PA
- Average rainfall in May: 1.69"
The wettest month (with the highest rainfall) is August (1.89").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in May
Marietta, PA
- Average rainfall days in May: 15.2 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in May
Marietta, PA
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.89").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Marietta, PA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (6.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Marietta, PA
- Average daylight in May: 14h and 24min
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 24min).
- Average sunshine in May: 8h and 12min
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 May
Marietta, PA
- Average sunshine days in May: 13.2 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is May (13.2 days).
Average UV index in May
Marietta, PA
- Average UV index in May: 6
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Marietta, PA
- Average cloud cover in May: 47
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in May
Marietta, PA
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, June, July, October, November and December (6mi).
The months with the lowest visibility are May, August and September (5mi).
