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
Rock City in May sees a temperature change, with average high-temperatures moving from a refreshing 55.9°F (13.3°C) in April to an agreeable 68°F (20°C). During May, Rock City experiences an average low-temperature of 50.9°F (10.5°C) at night.Humidity
The average relative humidity in May is 79%.Rainfall
In Rock City, during May, the rain falls for 17.4 days and regularly aggregates up to 2.6" (66mm) of precipitation. In Rock City, during the entire year, the rain falls for 138 days and collects up to 19.69" (500mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in May in Rock City is 14h and 37min.On the first day of the month, sunrise is at 5:51 am and sunset at 7:58 pm. On the last day of May, in Rock City, sunrise is at 5:23 am and sunset at 8:27 pm CDT.
Sunshine
In Rock City, the average sunshine in May is 8.4h.UV index
The months with the highest UV index in Rock City are May through August, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 5 during May translates into the following guidance:
Be vigilant - A duty to shield skin and eyes from injury exists. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Frequently asked questions
What are the temperatures in Rock City in May?
What is the average humidity in May in Rock City?
How many days does it rain in May in Rock City?
When it does not snow in Rock City?
Does it snow in Rock City in May?
How many hours of daylight does Rock City have in May?
When are sunrise and sunset in May in Rock City?
How many hours of sunshine does Rock City have in May?
What is the month with the highest UV index in Rock City?
What is the UV index reading in May in Rock City?
Average temperature in May
Rock City, IL
- Average high temperature in May: 68°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in May: 50.9°F
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure in May
Rock City, IL
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Rock City, IL
- Average wind speed in May: 8.8mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in May
Rock City, IL
- Average humidity in May: 79%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (75%).
Average rainfall in May
Rock City, IL
- Average rainfall in May: 2.6"
The wettest month (with the highest rainfall) is June (2.87").
The driest month (with the least rainfall) is December (0.83").
Average rainfall days in May
Rock City, IL
- Average rainfall days in May: 17.4 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (4.9 days).
Average snowfall in May
Rock City, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (2.99").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Rock City, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (11.3 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
Rock City, 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 months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in May
Rock City, IL
- Average sunshine days in May: 11.3 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in May
Rock City, 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
Rock City, IL
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in May
Rock City, IL
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Rock City, Illinois, USA
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