May weather forecastMonmouth, IL
May
Weather in May
The last month of the spring, May, is an agreeable month in Monmouth, Illinois, with temperature in the range of an average high of 70.9°F (21.6°C) and an average low of 54.1°F (12.3°C).Temperature
As Monmouth, Illinois, enters May, the average high-temperature increases from the a refreshing 60.4°F (15.8°C) of April to a pleasant 70.9°F (21.6°C). Throughout the month of May, the average temperature dips to a cool 54.1°F (12.3°C) at night.Humidity
The average relative humidity in May is 79%.Rainfall
The month with the most rainfall is May, when the rain falls for 19 days and typically aggregates up to 4.25" (108mm) of precipitation.Snowfall
In Monmouth, snow does not fall in May through September.Daylight
The average length of the day in May is 14h and 29min.On the first day of May, sunrise is at 5:59 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 5:33 am and sunset at 8:27 pm CDT.
Sunshine
In Monmouth, the average sunshine in May is 8.9h.UV index
The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: A maximum high UV index of 5 in May translates into the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Monmouth, IL
- Average high temperature in May: 70.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in May: 54.1°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure in May
Monmouth, IL
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Monmouth, IL
- Average wind speed in May: 9mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in May
Monmouth, IL
- Average humidity in May: 79%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Monmouth, IL
- Average rainfall in May: 4.25"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in May
Monmouth, IL
- Average rainfall days in May: 19 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in May
Monmouth, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (4.61").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Monmouth, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (10.9 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
Monmouth, IL
- Average daylight in May: 14h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 8h and 54min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in May
Monmouth, IL
- Average sunshine days in May: 9.9 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in May
Monmouth, IL
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in May
Monmouth, IL
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in May
Monmouth, IL
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
