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
The shift from April to May brings an increase in the average high-temperature, moving from an enjoyable 63.3°F (17.4°C) to a pleasant 72.9°F (22.7°C). Chatham's temperature tends to fall to an average low of 56.1°F (13.4°C) during the nights of May.Humidity
In Chatham, the average relative humidity in May is 78%.Rainfall
In Chatham, during May, the rain falls for 12.5 days and regularly aggregates up to 1.06" (27mm) of precipitation. Throughout the year, there are 104.2 rainfall days, and 9.29" (236mm) of precipitation is accumulated.Snowfall
In Chatham, Illinois, snow does not fall in May through October.Daylight
The average length of the day in May in Chatham is 14h and 23min.On the first day of May, sunrise is at 5:58 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 5:33 am and sunset at 8:20 pm CDT.
Sunshine
In Chatham, the average sunshine in May is 9.3h.UV index
In Chatham, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index, 5 in May, converts into the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Chatham?
What is the average humidity in May in Chatham?
How much does it rain in Chatham in May?
When it does not snow in Chatham?
Does it snow in Chatham in May?
How many hours of daylight does Chatham have in May?
What time are sunrise and sunset in May in Chatham?
How many hours of sunshine does Chatham have in May?
What is the UV index reading in May in Chatham?
Average temperature in May
Chatham, IL
- Average high temperature in May: 72.9°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in May: 56.1°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in May
Chatham, IL
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Chatham, IL
- Average wind speed in May: 8.5mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in May
Chatham, IL
- Average humidity in May: 78%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in May
Chatham, IL
- Average rainfall in May: 1.06"
The wettest month (with the highest rainfall) is June (1.22").
The driest month (with the least rainfall) is December (0.43").
Average rainfall days in May
Chatham, IL
- Average rainfall days in May: 12.5 days
The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is January (4.4 days).
Average snowfall in May
Chatham, IL
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.91").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Chatham, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (5.7 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
Chatham, 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 24min).
- Average sunshine in May: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in May
Chatham, IL
- Average sunshine days in May: 14.8 days
The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is June (14 days).
Average UV index in May
Chatham, 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
Chatham, IL
- Average cloud cover in May: 38
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility in May
Chatham, IL
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Chatham, Illinois, USA
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