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
As May arrives, a rise in the average high-temperature is observed, moving from a mild 59.4°F (15.2°C) in April to a pleasant 70.3°F (21.3°C). Rockhill experiences a mean temperature of 49.5°F (9.7°C) during May nights.Humidity
In May, the average relative humidity is 78%.Rainfall
May is the month with the most rainfall. Rain falls for 17.7 days and accumulates 3.07" (78mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In May, the average length of the day is 14h and 26min.On the first day of the month, sunrise is at 6:10 am and sunset at 8:07 pm. On the last day of May, sunrise is at 5:44 am and sunset at 8:34 pm EDT.
Sunshine
The average sunshine in May is 8.5h.UV index
May and June, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high UV index of 6 in May translates into the following recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the average humidity in May?
What is the wettest month?
How much does it rain in May?
When it does not snow in Rockhill?
Does it snow in May?
What is the average length of the day in May?
When are sunrise and sunset in May in Rockhill?
How many hours of sunshine does Rockhill have in May?
What are the months with the highest UV index in Rockhill?
What is the UV index intensity in May?
Average temperature in May
Rockhill, PA
- Average high temperature in May: 70.3°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in May: 49.5°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in May
Rockhill, PA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in May
Rockhill, PA
- Average wind speed in May: 5.8mph
The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in May
Rockhill, PA
- Average humidity in May: 78%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is July (75%).
Average rainfall in May
Rockhill, PA
- Average rainfall in May: 3.07"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in May
Rockhill, PA
- Average rainfall days in May: 17.7 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (9.5 days).
Average snowfall in May
Rockhill, PA
- Average snowfall in May: 0"
The month with the highest snowfall is January (5.24").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Rockhill, PA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Rockhill, PA
- Average daylight in May: 14h and 2min
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 3min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in May
Rockhill, PA
- Average sunshine days in May: 10.7 days
The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in May
Rockhill, PA
- Average UV index in May: 6
The months with the highest UV index are May and June (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
Rockhill, PA
- Average cloud cover in May: 47
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in May
Rockhill, 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).
Rockhill, Pennsylvania, USA
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