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 commencement of May sees a shift in the average high-temperature, moving from a mild 56.5°F (13.6°C) in April to an agreeable 68.4°F (20.2°C). South Williamsport reports a consistent average low-temperature of 48°F (8.9°C) throughout May nights.Humidity
In May, the average relative humidity is 79%.Rainfall
In South Williamsport, in May, during 16.6 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. In South Williamsport, during the entire year, the rain falls for 145.2 days and collects up to 16.57" (421mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In South Williamsport, the average length of the day in May is 14h and 31min.On the first day of the month, sunrise is at 6:04 am and sunset at 8:05 pm. On the last day of May, sunrise is at 5:37 am and sunset at 8:34 pm EDT.
Sunshine
In South Williamsport, the average sunshine in May is 8.3h.UV index
In South Williamsport, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In May, the average maximum UV index of 5 translates into the following recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
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?
How many days does it rain in May?
When it does not snow?
Does it snow in May?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How many hours of sunshine does South Williamsport have in May?
What is the UV index reading in May?
Average temperature in May
South Williamsport, PA
- Average high temperature in May: 68.4°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in May: 48°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in May
South Williamsport, 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
South Williamsport, PA
- Average wind speed in May: 6.2mph
The windiest months (with the highest average wind speed) are January, March and April (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in May
South Williamsport, PA
- Average humidity in May: 79%
The month with the highest relative humidity is February (84%).
The months with the lowest relative humidity are April and July (77%).
Average rainfall in May
South Williamsport, PA
- Average rainfall in May: 1.85"
The wettest month (with the highest rainfall) is April (1.93").
The driest month (with the least rainfall) is November (0.94").
Average rainfall days in May
South Williamsport, PA
- Average rainfall days in May: 16.6 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (7.5 days).
Average snowfall in May
South Williamsport, PA
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.28").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
South Williamsport, PA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
South Williamsport, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The months with the least sunshine are January and February (Average sunshine: 3h and 42min).
Average sunshine days in May
South Williamsport, PA
- Average sunshine days in May: 11.8 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in May
South Williamsport, 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
South Williamsport, PA
- Average cloud cover in May: 49
The months with the most cloud cover are January and February (Cloud cover 60).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in May
South Williamsport, PA
- Average visibility in May: 5mi
The month with the highest visibility is April (6mi).
The month with the lowest visibility is September (4mi).
South Williamsport, Pennsylvania, USA
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