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
The onset of May brings a temperature shift, with the average high-temperature moving from a fresh 53.6°F (12°C) in April to a refreshing 66.6°F (19.2°C). In Ralston, May is marked by an average low-temperature of 46.6°F (8.1°C).Humidity
In Ralston, the average relative humidity in May is 79%.Rainfall
In May, the rain falls for 17.7 days. Throughout May, 2.91" (74mm) of precipitation is accumulated. Throughout the year, there are 156.3 rainfall days, and 29.25" (743mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.4 snowfall days, in May, Ralston aggregates 0.39" (10mm) of snow. In Ralston, Pennsylvania, during the entire year, snow falls for 63.2 days and aggregates up to 33.23" (844mm) of snow.Daylight
The average length of the day in May is 14h and 32min.On the first day of the month, sunrise is at 6:03 am and sunset at 8:06 pm. On the last day of May, sunrise is at 5:36 am and sunset at 8:34 pm EDT.
Sunshine
The average sunshine in May is 8.2h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In May, the average maximum UV index of 5 translates into the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. To guard against the harmful effects of the Sun, minimize exposure during midday. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Ralston in May?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows?
How many hours of daylight does Ralston have in May?
When are sunrise and sunset in May?
How many hours of sunshine does Ralston have in May?
What is the month with the highest UV index?
How high is the UV index in May?
Average temperature in May
Ralston, PA
- Average high temperature in May: 66.6°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in May: 46.6°F
The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in May
Ralston, PA
- Average pressure in May: 30"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in May
Ralston, PA
- Average wind speed in May: 7mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in May
Ralston, PA
- Average humidity in May: 79%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is July (78%).
Average rainfall in May
Ralston, PA
- Average rainfall in May: 2.91"
The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is January (1.73").
Average rainfall days in May
Ralston, PA
- Average rainfall days in May: 17.7 days
The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is February (6.5 days).
Average snowfall in May
Ralston, PA
- Average snowfall in May: 0.39"
The month with the highest snowfall is February (7.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Ralston, PA
- Average snowfall days in May: 0.4 days
The month with the highest number of snowfall days is January (14.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Ralston, 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 12min).
- Average sunshine in May: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The months with the least sunshine are January and December (Average sunshine: 3h and 12min).
Average sunshine days in May
Ralston, PA
- Average sunshine days in May: 10.9 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in May
Ralston, PA
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Ralston, PA
- Average cloud cover in May: 50
The months with the most cloud cover are January and December (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 39).
Average visibility in May
Ralston, PA
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Ralston, Pennsylvania, USA
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