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
May sees a rise in the average high-temperature, climbing from 55.8°F (13.2°C) in April to a still refreshing 67.1°F (19.5°C). Rock Glen, during the nights of May, experiences an average temperature drop to a chilly 48°F (8.9°C).Humidity
In Rock Glen, the average relative humidity in May is 81%.Rainfall
May is the month with the most rainfall. Rain falls for 13.8 days and accumulates 1.26" (32mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Rock Glen aggregates 0.16" (4mm) of snow. In Rock Glen, Pennsylvania, during the entire year, snow falls for 31.5 days and aggregates up to 7.28" (185mm) of snow.Daylight
In Rock Glen, the average length of the day in May is 14h and 29min.On the first day of May, sunrise is at 6:01 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:34 am and sunset at 8:30 pm EDT.
Sunshine
In May, the average sunshine is 7.7h.UV index
In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In May, a regular UV index of 5 translates into these guidelines:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. 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 is the temperature in May?
What is the average humidity in May?
What is the rainiest month?
How much does it rain in May?
What is the last month it snows in Rock Glen?
How many hours of daylight does Rock Glen have in May?
When is the sunrise / sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Rock Glen, PA
- Average high temperature in May: 67.1°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in May: 48°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in May
Rock Glen, 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
Rock Glen, PA
- Average wind speed in May: 6.5mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in May
Rock Glen, PA
- Average humidity in May: 81%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (78%).
Average rainfall in May
Rock Glen, PA
- Average rainfall in May: 1.26"
The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days in May
Rock Glen, PA
- Average rainfall days in May: 13.8 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in May
Rock Glen, PA
- Average snowfall in May: 0.16"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Rock Glen, PA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (9.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Rock Glen, 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: 7h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in May
Rock Glen, PA
- Average sunshine days in May: 14.3 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is May (14.3 days).
Average UV index in May
Rock Glen, PA
- Average UV index in May: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in May
Rock Glen, PA
- Average cloud cover in May: 52
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in May
Rock Glen, PA
- Average visibility in May: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Rock Glen, Pennsylvania, USA
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