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
May's onset is marked by a temperature increase, moving from a refreshing 61.3°F (16.3°C) in April to a pleasant 71.4°F (21.9°C). Derby, in May, witnesses an average low-temperature of 54.7°F (12.6°C).Humidity
In May, the average relative humidity in Derby is 79%.Rainfall
May is the month with the most rainfall in Derby. Rain falls for 15.8 days and accumulates 1.81" (46mm) of precipitation.Snowfall
In Derby, snow does not fall in May through September.Daylight
The average length of the day in May is 14h and 23min.On the first day of the month, sunrise is at 6:32 am and sunset at 8:27 pm. On the last day of May, sunrise is at 6:06 am and sunset at 8:54 pm EDT.
Sunshine
In May, the average sunshine is 9.1h.UV index
The months with the highest UV index in Derby are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 6 during May translates into the following directions:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Derby?
What is the average humidity in May in Derby?
What is the rainiest month in Derby?
How much does it rain in Derby in May?
When it does not snow in Derby?
Does it snow in Derby in May?
How many hours of daylight does Derby have in May?
What time are sunrise and sunset in May in Derby?
How long on average sun shines in May in Derby?
When is the highest UV index in Derby?
What is the UV index reading in May in Derby?
Average temperature in May
Derby, OH
- Average high temperature in May: 71.4°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in May: 54.7°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in May
Derby, OH
- Average pressure in May: 29.98"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in May
Derby, OH
- Average wind speed in May: 7.5mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in May
Derby, OH
- Average humidity in May: 79%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in May
Derby, OH
- Average rainfall in May: 1.81"
The wettest month (with the highest rainfall) is May (1.81").
The driest month (with the least rainfall) is September (0.87").
Average rainfall days in May
Derby, OH
- Average rainfall days in May: 15.8 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (7.6 days).
Average snowfall in May
Derby, OH
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.22").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Derby, OH
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (8.7 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, OH
- Average daylight in May: 14h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in May: 9h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in May
Derby, OH
- Average sunshine days in May: 11.5 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in May
Derby, OH
- 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, November and December (UV index 2).
Average cloud cover in May
Derby, OH
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in May
Derby, OH
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Derby, Ohio, USA
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