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 arrival in Lanark signals an increase in average high-temperatures, moving from April's moderate 56.5°F (13.6°C) to an agreeable 68.5°F (20.3°C). Lanark observes an average low-temperature of 51.4°F (10.8°C) during May.Humidity
In Lanark, the average relative humidity in May is 79%.Rainfall
The month with the most rainfall in Lanark, Illinois, is May, when the rain falls for 17.9 days and typically aggregates up to 2.76" (70mm) of precipitation.Snowfall
In Lanark, snow does not fall in May through September.Daylight
In May, the average length of the day is 14h and 35min.On the first day of the month, sunrise is at 5:53 am and sunset at 7:58 pm. On the last day of May, sunrise is at 5:25 am and sunset at 8:28 pm CDT.
Sunshine
In May, the average sunshine in Lanark is 8.5h.UV index
In Lanark, Illinois, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 5 in May interprets into the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Avoiding the Sun during its peak radiation time around midday is a healthy practice. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Frequently asked questions
What is the temperature in May in Lanark?
What is the average humidity in May in Lanark?
What is the wettest month in Lanark?
How much does it rain in Lanark in May?
When it does not snow in Lanark?
Does it snow in Lanark in May?
How many hours of daylight does Lanark have in May?
When is the sunrise / sunset in May in Lanark?
How many hours of sunshine does Lanark have in May?
What is the UV index reading in May in Lanark?
Average temperature in May
Lanark, IL
- Average high temperature in May: 68.5°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in May: 51.4°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in May
Lanark, IL
- Average pressure in May: 29.95"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
Lanark, IL
- Average wind speed in May: 8.8mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in May
Lanark, 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
Lanark, IL
- Average rainfall in May: 2.76"
The wettest month (with the highest rainfall) is May (2.76").
The driest months (with the least rainfall) are January and February (0.71").
Average rainfall days in May
Lanark, IL
- Average rainfall days in May: 17.9 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in May
Lanark, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (2.64").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Lanark, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (11.2 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
Lanark, 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 12min).
- Average sunshine in May: 8h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Lanark, IL
- Average sunshine days in May: 11.6 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (10 days).
Average UV index in May
Lanark, IL
- Average UV index in May: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Lanark, IL
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in May
Lanark, IL
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Lanark, Illinois, USA
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