May weather forecastRochester, NH
May
Weather in May
The merry month of May arrives in Rochester signaling that the warmth of summer is not far behind. Temperatures rise significantly, maxing out at an average of 63.1°F (17.3°C). The increased warmth, coupled with extended sunlight, encourage the bloom of flora across the city. Rainfall, while still present, reduces from the months of spring, hinting at the drier summer months. The weather, characterized by gradually warming temperatures and a decrease in rainfall, ushers in an atmosphere of renewed vibrancy in the city.Temperature
The shift from April to May sees an increase in the average high-temperature, transitioning from a cool 52°F (11.1°C) to a refreshing 63.1°F (17.3°C). May nights observe an average temperature dip to a chilly 46.2°F (7.9°C).Humidity
In May, the average relative humidity is 77%.Rainfall
In Rochester, New Hampshire, in May, during 15.1 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. In Rochester, during the entire year, the rain falls for 143.1 days and collects up to 29.06" (738mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Rochester. During 0.1 snowfall days, in May, Rochester aggregates 0.28" (7mm) of snow. In Rochester, during the entire year, snow falls for 40 days and aggregates up to 27.8" (706mm) of snow.Daylight
The average length of the day in May is 14h and 42min.On the first day of the month, sunrise is at 5:35 am and sunset at 7:46 pm. On the last day of May, sunrise is at 5:06 am and sunset at 8:16 pm EDT.
Sunshine
In Rochester, the average sunshine in May is 8.2h.UV index
The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: During May, 5 as the daily maximum UV index converts into the following advice:
Guard yourself - An obligation to protect skin and eyes from harm exists. Minimize direct exposure to the Sun during midday when its radiation is at its peak. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Rochester, NH
- Average high temperature in May: 63.1°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in May: 46.2°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in May
Rochester, NH
- Average pressure in May: 30"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Rochester, NH
- Average wind speed in May: 6.7mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in May
Rochester, NH
- Average humidity in May: 77%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is April (75%).
Average rainfall in May
Rochester, NH
- Average rainfall in May: 2.13"
The wettest months (with the highest rainfall) are October and December (3.11").
The driest month (with the least rainfall) is September (1.5").
Average rainfall days in May
Rochester, NH
- Average rainfall days in May: 15.1 days
The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in May
Rochester, NH
- Average snowfall in May: 0.28"
The month with the highest snowfall is December (6.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Rochester, NH
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Rochester, NH
- Average daylight in May: 14h and 42min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 8h and 12min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in May
Rochester, NH
- Average sunshine days in May: 14.3 days
The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is April (13.3 days).
Average UV index in May
Rochester, NH
- Average UV index in May: 5
The months with the highest UV index are 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
Rochester, NH
- Average cloud cover in May: 47
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in May
Rochester, NH
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, October, November and December (6mi).
The months with the lowest visibility are May, June, July, August and September (5mi).
