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
With the onset of May, Dorchester sees a temperature rise, with the average high-temperature moving from April's enjoyable 63.9°F (17.7°C) to a moderately hot 73.9°F (23.3°C). Throughout the nights in May, an average low-temperature of 56.7°F (13.7°C) is noted.Humidity
In May, the average relative humidity in Dorchester is 79%.Rainfall
In Dorchester, during May, the rain falls for 13.9 days and regularly aggregates up to 1.81" (46mm) of precipitation. Throughout the year, in Dorchester, there are 121.4 rainfall days, and 14.72" (374mm) of precipitation is accumulated.Snowfall
In Dorchester, snow does not fall in April through October.Daylight
In May, the average length of the day is 14h and 20min.On the first day of the month, sunrise is at 6:00 am and sunset at 7:52 pm. On the last day of May, in Dorchester, sunrise is at 5:35 am and sunset at 8:19 pm CDT.
Sunshine
In May, the average sunshine is 9.3h.UV index
In Dorchester, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: In May, an average UV index of 5 transforms into the following instructions:
Be vigilant - Suggestions to stave off sun damage are provided. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Dorchester in May?
What is the average humidity in May in Dorchester?
How many days does it rain in May in Dorchester?
When it does not snow in Dorchester?
What is the average length of the day in May in Dorchester?
What time are sunrise and sunset in May in Dorchester?
How long on average sun shines in May in Dorchester?
What is the UV index reading in May in Dorchester?
Average temperature in May
Dorchester, IL
- Average high temperature in May: 73.9°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in May: 56.7°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in May
Dorchester, IL
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Dorchester, IL
- Average wind speed in May: 7.8mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in May
Dorchester, IL
- Average humidity in May: 79%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Dorchester, IL
- Average rainfall in May: 1.81"
The wettest month (with the highest rainfall) is June (1.89").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in May
Dorchester, IL
- Average rainfall days in May: 13.9 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in May
Dorchester, IL
- Average snowfall in May: 0"
The month with the highest snowfall is December (0.98").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Dorchester, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (6.3 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
Dorchester, IL
- 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 30min).
- Average sunshine in May: 9h and 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in May
Dorchester, IL
- Average sunshine days in May: 13.6 days
The month with the most sunshine days is January (20.9 days).
The month with the least sunshine days is July (12.5 days).
Average UV index in May
Dorchester, IL
- Average UV index in May: 5
The months with the highest UV index are 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
Dorchester, IL
- Average cloud cover in May: 38
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are June, July, August and September (Cloud cover 29).
Average visibility in May
Dorchester, IL
- 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).
Dorchester, Illinois, USA
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