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 refreshing 60.6°F (15.9°C) in April to an agreeable 71.1°F (21.7°C). In May, Rocky Hill reports a consistent average low-temperature of 53.6°F (12°C) during the nights.Humidity
The average relative humidity in May in Rocky Hill is 77%.Rainfall
In Rocky Hill, Pennsylvania, during May, the rain falls for 13.7 days and regularly aggregates up to 1.38" (35mm) of precipitation. In Rocky Hill, Pennsylvania, during the entire year, the rain falls for 124.6 days and collects up to 14.25" (362mm) of precipitation.Snowfall
Months with snowfall in Rocky Hill are January through May, November and December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Rocky Hill aggregates 0.16" (4mm) of snow. In Rocky Hill, during the entire year, snow falls for 18.5 days and aggregates up to 5.51" (140mm) of snow.Daylight
In May, the average length of the day in Rocky Hill is 14h and 24min.On the first day of the month, sunrise is at 6:01 am and sunset at 7:57 pm. On the last day of May, sunrise is at 5:35 am and sunset at 8:24 pm EDT.
Sunshine
The average sunshine in May in Rocky Hill is 8.2h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in May converts into the following recommendations:
Shun overexposure. Protection from sun ravages is indispensable. 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. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Frequently asked questions
What is the usual temperature for Rocky Hill in May?
What is the average humidity in May in Rocky Hill?
How much does it rain in Rocky Hill in May?
What is the last month it snows in Rocky Hill?
What is the average length of the day in May in Rocky Hill?
When are sunrise and sunset in May in Rocky Hill?
How long on average sun shines in May in Rocky Hill?
What is the month with the highest UV index in Rocky Hill?
What is the UV index reading 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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