Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
Observing a rise in May, the average high-temperature goes from April's refreshing 57.2°F (14°C) to a pleasant 68.2°F (20.1°C). Throughout May, Merrian registers a consistent average low-temperature of 49.3°F (9.6°C).Humidity
In Merrian, the average relative humidity in May is 81%.Rainfall
The wettest months in Merrian are May and July, with an average 1.97" (50mm) of rainfall.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Merrian. During 0.2 snowfall days, in May, Merrian aggregates 0.12" (3mm) of snow. Throughout the year, there are 28.6 snowfall days, and 9.37" (238mm) of snow is accumulated.Daylight
The average length of the day in May is 14h and 28min.On the first day of the month, sunrise is at 6:02 am and sunset at 8:02 pm. On the last day of May, sunrise is at 5:36 am and sunset at 8:30 pm EDT.
Sunshine
In Merrian, the average sunshine in May is 8.2h.UV index
In Merrian, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In May, a daily UV index of 5 turns into the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Merrian in May?
What is the average humidity in May in Merrian?
What is the wettest month in Merrian?
How many days does it rain in May in Merrian?
What is the last month it snows in Merrian?
How many hours of daylight does Merrian have in May?
When is the sunrise / sunset in May in Merrian?
How many hours of sunshine does Merrian have in May?
What is the UV index reading in May in Merrian?
Average temperature in May
Merrian, PA
- Average high temperature in May: 68.2°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (32°F).
- Average low temperature in May: 49.3°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in May
Merrian, 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
Merrian, PA
- Average wind speed in May: 6.4mph
The windiest months (with the highest average wind speed) are March and April (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in May
Merrian, PA
- Average humidity in May: 81%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are March and April (77%).
Average rainfall in May
Merrian, PA
- Average rainfall in May: 1.97"
The wettest months (with the highest rainfall) are May and July (1.97").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days in May
Merrian, PA
- Average rainfall days in May: 15.4 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in May
Merrian, PA
- Average snowfall in May: 0.12"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Merrian, PA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Merrian, PA
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in May
Merrian, PA
- Average sunshine days in May: 12.5 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is May (12.5 days).
Average UV index in May
Merrian, PA
- Average UV index in May: 5
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in May
Merrian, PA
- Average cloud cover in May: 49
The month with the most cloud cover is February (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in May
Merrian, PA
- Average visibility in May: 5mi
The months with the highest visibility are March, April, November and December (6mi).
The months with the lowest visibility are January, February, May, June, July, August, September and October (5mi).
Merrian, Pennsylvania, USA
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