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
In May, the average high-temperature rises from a fresh 51.4°F (10.8°C) in April to an enjoyable 64.2°F (17.9°C). In Derby, New York, the average low-temperature is 47.7°F (8.7°C).Humidity
The average relative humidity in May in Derby, New York, is 79%.Rainfall
In Derby, during 16.4 rainfall days, 2.48" (63mm) of precipitation is typically accumulated. Throughout the year, there are 160.5 rainfall days, and 24.17" (614mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.4 snowfall days, in May, Derby aggregates 0.2" (5mm) of snow. In Derby, during the entire year, snow falls for 62.9 days and aggregates up to 19.65" (499mm) of snow.Daylight
The average length of the day in May in Derby, New York, is 14h and 39min.On the first day of May, sunrise is at 6:10 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 8:46 pm EDT.
Sunshine
In May, the average sunshine in Derby is 8.9h.UV index
In May, the average daily maximum UV index in Derby is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The average daily UV index of 5 in May transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
FAQ
What is the temperature in May in Derby?
What is the average humidity in May in Derby?
How many days does it rain in May in Derby?
What is the last month it snows in Derby?
How many hours of daylight does Derby have in May?
When is the sunrise / sunset in May in Derby?
How long on average sun shines in May in Derby?
What is the UV index reading in May in Derby?
Average temperature in May
Derby, NY
- Average high temperature in May: 64.2°F
The warmest month (with the highest average high temperature) is July (77.2°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in May: 47.7°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in May
Derby, NY
- Average pressure in May: 29.99"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Derby, NY
- Average wind speed in May: 8.1mph
The windiest month (with the highest average wind speed) is January (11.8mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).
Average humidity in May
Derby, NY
- Average humidity in May: 79%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are August and September (78%).
Average rainfall in May
Derby, NY
- Average rainfall in May: 2.48"
The wettest month (with the highest rainfall) is July (2.52").
The driest month (with the least rainfall) is January (1.54").
Average rainfall days in May
Derby, NY
- Average rainfall days in May: 16.4 days
The months with the highest number of rainy days are July and October (18.1 days).
The month with the least rainy days is February (7 days).
Average snowfall in May
Derby, NY
- Average snowfall in May: 0.2"
The month with the highest snowfall is February (5.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Derby, NY
- Average snowfall days in May: 0.4 days
The month with the highest number of snowfall days is January (15.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Derby, NY
- Average daylight in May: 14h and 39min
The month with the longest days is June (Average daylight: 15h and 16min).
The month with the shortest days is December (Average daylight: 9h and 7min).
- Average sunshine in May: 8h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in May
Derby, NY
- Average sunshine days in May: 12.6 days
The month with the most sunshine days is March (13 days).
The month with the least sunshine days is January (8.3 days).
Average UV index in May
Derby, NY
- 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 and December (UV index 1).
Average cloud cover in May
Derby, NY
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 76).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in May
Derby, NY
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
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