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
Savanna's May weather brings a rise in high-temperatures, moving from a moderate 56.7°F (13.7°C) in April to an agreeable 68.5°F (20.3°C). In the month of May, Savanna records a consistent average low-temperature of 51.6°F (10.9°C).Humidity
In May, the average relative humidity is 79%.Rainfall
The month with the most rainfall is May, when the rain falls for 18.5 days and typically aggregates up to 4.09" (104mm) of precipitation.Snowfall
Months with snowfall in Savanna are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Savanna aggregates 0.04" (1mm) of snow. Throughout the year, there are 41.2 snowfall days, and 16.73" (425mm) of snow is accumulated.Daylight
The average length of the day in May is 14h and 35min.On the first day of May, sunrise is at 5:55 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 5:27 am and sunset at 8:29 pm CDT.
Sunshine
The average sunshine in May is 8.5h.UV index
In Savanna, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: An average UV index of 5 in May transforms into this advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
What is the rainiest month in Savanna?
How much does it rain in May?
What is the last month it snows?
How many hours of daylight does Savanna have in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
What is the UV index reading in May?
Average temperature in May
Savanna, IL
- Average high temperature in May: 68.5°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in May: 51.6°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in May
Savanna, 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
Savanna, 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
Savanna, IL
- Average humidity in May: 79%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (74%).
Average rainfall in May
Savanna, IL
- Average rainfall in May: 4.09"
The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is February (1.38").
Average rainfall days in May
Savanna, IL
- Average rainfall days in May: 18.5 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in May
Savanna, IL
- Average snowfall in May: 0.04"
The month with the highest snowfall is January (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Savanna, IL
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Savanna, 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
Savanna, IL
- Average sunshine days in May: 10.9 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (9.6 days).
Average UV index in May
Savanna, 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
Savanna, 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
Savanna, 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).
Savanna, Illinois, USA
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