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 arrival brings a change in high-temperatures, moving from a fresh 55.2°F (12.9°C) in April to a refreshing 67.1°F (19.5°C). Decatur, during the month of May, experiences an average low-temperature of 49.8°F (9.9°C).Humidity
In Decatur, the average relative humidity in May is 80%.Rainfall
In May, the rain falls for 15.4 days. Throughout May, 2.48" (63mm) of precipitation is accumulated. In Decatur, during the entire year, the rain falls for 139.4 days and collects up to 20" (508mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.2 snowfall days, in May, Decatur aggregates 0.08" (2mm) of snow. In Decatur, during the entire year, snow falls for 63 days and aggregates up to 14.45" (367mm) of snow.Daylight
In Decatur, the average length of the day in May is 14h and 35min.On the first day of the month, sunrise is at 6:38 am and sunset at 8:43 pm. On the last day of May, sunrise is at 6:10 am and sunset at 9:12 pm EDT.
Sunshine
In Decatur, the average sunshine in May is 8.4h.UV index
In Decatur, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A daily maximum UV index of 5 in May translates into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the average humidity in May?
How many days does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How many hours of sunshine does Decatur have in May?
What is the UV index reading in May?
Average temperature in May
Decatur, MI
- Average high temperature in May: 67.1°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in May: 49.8°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in May
Decatur, MI
- Average pressure in May: 29.97"Hg
The months with the highest atmospheric pressure are January, March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Decatur, MI
- Average wind speed in May: 8.4mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in May
Decatur, MI
- Average humidity in May: 80%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in May
Decatur, MI
- Average rainfall in May: 2.48"
The wettest month (with the highest rainfall) is June (2.6").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days in May
Decatur, MI
- Average rainfall days in May: 15.4 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in May
Decatur, MI
- Average snowfall in May: 0.08"
The month with the highest snowfall is January (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Decatur, MI
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (17.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Decatur, MI
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in May
Decatur, MI
- Average sunshine days in May: 12.7 days
The month with the most sunshine days is March (14.4 days).
The month with the least sunshine days is January (9.8 days).
Average UV index in May
Decatur, MI
- Average UV index in May: 5
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Decatur, MI
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in May
Decatur, MI
- 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).
Decatur, Michigan, USA
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