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 onset brings a rise in the average high-temperature, moving from a fresh 54.9°F (12.7°C) in April to a comfortable 66.9°F (19.4°C). Throughout May, Harvard's nights cool down to an average of 49.5°F (9.7°C).Humidity
In May, the average relative humidity in Harvard, Illinois, is 79%.Rainfall
In May, in Harvard, the rain falls for 18.8 days. Throughout May, 3.03" (77mm) of precipitation is accumulated. In Harvard, during the entire year, the rain falls for 152.8 days and collects up to 26.46" (672mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Harvard. During 0.2 snowfall days, in May, Harvard aggregates 0.08" (2mm) of snow. In Harvard, Illinois, during the entire year, snow falls for 54.4 days and aggregates up to 16.93" (430mm) of snow.Daylight
In May, the average length of the day in Harvard is 14h and 37min.On the first day of May in Harvard, sunrise is at 5:48 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 5:19 am and sunset at 8:24 pm CDT.
Sunshine
In Harvard, the average sunshine in May is 8.4h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high daily UV index of 5 during May translates into the following directions:
Undertake precautions - Obligation exists to protect against skin and eye damage. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What are May temperatures in Harvard?
What is the average humidity in May in Harvard?
How many days does it rain in May in Harvard?
What is the last month it snows in Harvard?
What is the average length of the day in May in Harvard?
When is the sunrise / sunset in May in Harvard?
How many hours of sunshine does Harvard have in May?
When is the highest UV index in Harvard?
How high is the UV index in May in Harvard?
Average temperature in May
Harvard, IL
- Average high temperature in May: 66.9°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (25.3°F).
- Average low temperature in May: 49.5°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure in May
Harvard, IL
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Harvard, IL
- Average wind speed in May: 8.4mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in May
Harvard, IL
- Average humidity in May: 79%
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
Harvard, IL
- Average rainfall in May: 3.03"
The wettest month (with the highest rainfall) is June (3.58").
The driest month (with the least rainfall) is December (1.3").
Average rainfall days in May
Harvard, IL
- Average rainfall days in May: 18.8 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is January (4.9 days).
Average snowfall in May
Harvard, IL
- Average snowfall in May: 0.08"
The month with the highest snowfall is January (4.41").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Harvard, IL
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Harvard, IL
- 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 6min).
- Average sunshine in May: 8h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in May
Harvard, IL
- Average sunshine days in May: 9.7 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is May (9.7 days).
Average UV index in May
Harvard, IL
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Harvard, IL
- Average cloud cover in May: 44
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is September (Cloud cover 35).
Average visibility in May
Harvard, IL
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, October and November (6mi).
The months with the lowest visibility are January, February, July, August, September and December (5mi).
Harvard, Illinois, USA
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