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 marks an increase in the average high-temperature, moving from a moderate 60.6°F (15.9°C) in April to a pleasant 71.1°F (21.7°C). During May, Rocky Hill's temperature falls to a steady low-temperature average of 53.6°F (12°C).Humidity
The average relative humidity in May is 77%.Rainfall
In Rocky Hill, during May, the rain falls for 13.7 days and regularly aggregates up to 1.38" (35mm) of precipitation. Throughout the year, there are 124.6 rainfall days, and 14.25" (362mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, November and December. May is the last month it regularly snows in Rocky Hill. During 0.2 snowfall days, in May, Rocky Hill aggregates 0.16" (4mm) of snow. Throughout the year, there are 18.5 snowfall days, and 5.51" (140mm) of snow is accumulated.Daylight
The average length of the day in May is 14h and 24min.On the first day of May, sunrise is at 6:01 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 5:35 am and sunset at 8:24 pm EDT.
Sunshine
The average sunshine in May is 8.2h.UV index
May through August, 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 threat to health from unsafe exposure to UV radiation for the average person.Note: In May, a regular UV index of 6 translates into these guidelines:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Rocky Hill have in May?
What are the months with the highest UV index?
What is the UV index intensity in May in Rocky Hill?
Average temperature in May
Rocky Hill, PA
- Average high temperature in May: 71.1°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in May: 53.6°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in May
Rocky Hill, PA
- Average pressure in May: 30.01"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
Rocky Hill, PA
- Average wind speed in May: 6.6mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in May
Rocky Hill, PA
- Average humidity in May: 77%
The months with the highest relative humidity are February and October (79%).
The months with the lowest relative humidity are April and July (73%).
Average rainfall in May
Rocky Hill, PA
- Average rainfall in May: 1.38"
The wettest month (with the highest rainfall) is August (1.89").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in May
Rocky Hill, PA
- Average rainfall days in May: 13.7 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is January (5 days).
Average snowfall in May
Rocky Hill, PA
- Average snowfall in May: 0.16"
The month with the highest snowfall is March (1.57").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Rocky Hill, PA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Rocky Hill, 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in May
Rocky Hill, PA
- Average sunshine days in May: 14.4 days
The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is June (13.3 days).
Average UV index in May
Rocky Hill, PA
- Average UV index in May: 6
The months with the highest UV index are May, June, July and August (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
Rocky Hill, PA
- Average cloud cover in May: 49
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in May
Rocky Hill, PA
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Rocky Hill, Pennsylvania, USA
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