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
Derby's weather in May presents a rise in the average high-temperature, moving from an enjoyable 66.2°F (19°C) in April to a warm 75.6°F (24.2°C). Derby's nighttime temperature in May drops to an average of 57.4°F (14.1°C).Humidity
The months with the highest humidity in Derby are February and May, with an average relative humidity of 80%.Rainfall
In May, the rain falls for 15.1 days. Throughout May, 1.93" (49mm) of precipitation is accumulated. In Derby, during the entire year, the rain falls for 133.4 days and collects up to 17.99" (457mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Derby, the average length of the day in May is 14h and 15min.On the first day of the month, sunrise is at 5:48 am and sunset at 7:37 pm. On the last day of May, sunrise is at 5:25 am and sunset at 8:02 pm CDT.
Sunshine
In Derby, the average sunshine in May is 9.1h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 6 during May translates into the following recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Derby in May?
What is the most humid month in Derby?
What is the average humidity in May in Derby?
How many days does it rain in May in Derby?
When it does not snow in Derby?
Does it snow in Derby in May?
What is the average length of the day in May in Derby?
When are sunrise and sunset in May in Derby?
How many hours of sunshine does Derby have in May?
What is the month with the highest UV index in Derby?
What is the UV index intensity in May in Derby?
Average temperature in May
Derby, IN
- Average high temperature in May: 75.6°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in May: 57.4°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).
Average pressure in May
Derby, IN
- Average pressure in May: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in May
Derby, IN
- Average wind speed in May: 6.7mph
The windiest months (with the highest average wind speed) are January, February and April (8.1mph).
The calmest month (with the lowest average wind speed) is July (5mph).
Average humidity in May
Derby, IN
- Average humidity in May: 80%
The months with the highest relative humidity are February and May (80%).
The month with the lowest relative humidity is October (73%).
Average rainfall in May
Derby, IN
- Average rainfall in May: 1.93"
The wettest month (with the highest rainfall) is April (2.13").
The driest month (with the least rainfall) is September (0.75").
Average rainfall days in May
Derby, IN
- 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 October (8.4 days).
Average snowfall in May
Derby, IN
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.3").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Derby, IN
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (6.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Derby, IN
- Average daylight in May: 14h and 1min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in May: 9h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 18min).
Average sunshine days in May
Derby, IN
- Average sunshine days in May: 12.5 days
The month with the most sunshine days is October (20 days).
The month with the least sunshine days is May (12.5 days).
Average UV index in May
Derby, IN
- 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 and December (UV index 2).
Average cloud cover in May
Derby, IN
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in May
Derby, IN
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are May and July (5mi).
Derby, Indiana, USA
Weather forecast for your location
2. Allow the app to use your location