May weather forecastFarmington, IL
May
Weather in May
The last month of the spring, May, is a pleasant month in Farmington, Illinois, with temperature in the range of an average low of 54.5°F (12.5°C) and an average high of 71.4°F (21.9°C).Temperature
A shift in the average high-temperature is noticeable in May, changing from a refreshing 60.4°F (15.8°C) in April to a pleasant 71.4°F (21.9°C). Farmington's temperature lowers to a mean of 54.5°F (12.5°C) during the nights in May.Humidity
In Farmington, the average relative humidity in May is 78%.Rainfall
The month with the most rainfall in Farmington is May, when the rain falls for 18 days and typically aggregates up to 4.29" (109mm) of precipitation.Snowfall
In Farmington, snow does not fall in May through September.Daylight
The average length of the day in May in Farmington, Illinois, is 14h and 28min.On the first day of the month, sunrise is at 5:57 am and sunset at 7:56 pm. On the last day of May, in Farmington, Illinois, sunrise is at 5:31 am and sunset at 8:24 pm CDT.
Sunshine
In May, the average sunshine in Farmington is 9h.UV index
In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: A typical high UV index of 5 in May suggests the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Farmington, IL
- 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 (30.4°F).
- Average low temperature in May: 54.5°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in May
Farmington, IL
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Farmington, IL
- Average wind speed in May: 8.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in May
Farmington, IL
- Average humidity in May: 78%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Farmington, IL
- Average rainfall in May: 4.29"
The wettest month (with the highest rainfall) is May (4.29").
The driest months (with the least rainfall) are February and December (1.42").
Average rainfall days in May
Farmington, IL
- Average rainfall days in May: 18 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in May
Farmington, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (3.78").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Farmington, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (10.6 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
Farmington, IL
- Average daylight in May: 14h and 30min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 9h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in May
Farmington, IL
- Average sunshine days in May: 11.8 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in May
Farmington, IL
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Farmington, IL
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in May
Farmington, 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).
