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
As May arrives, a rise in the average high-temperature is observed, moving from a refreshing 63.5°F (17.5°C) in April to a warm 73.6°F (23.1°C). Altamont records a consistent low-temperature of 56.8°F (13.8°C) during May nights.Humidity
In Altamont, the average relative humidity in May is 80%.Rainfall
In Altamont, in May, it is raining for 17.5 days, with typically 2.91" (74mm) of accumulated precipitation. In Altamont, during the entire year, the rain falls for 141.3 days and collects up to 26.77" (680mm) of precipitation.Snowfall
In Altamont, snow does not fall in April through October.Daylight
In Altamont, the average length of the day in May is 14h and 20min.On the first day of May in Altamont, sunrise is at 5:55 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 5:31 am and sunset at 8:14 pm CDT.
Sunshine
In Altamont, the average sunshine in May is 9.1h.UV index
In May, the average daily maximum UV index in Altamont is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: In May, the maximum UV index of 5 translates into these guidelines:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Frequently asked questions
What is the temperature in May in Altamont?
What is the average humidity in May in Altamont?
How much does it rain in Altamont in May?
When it does not snow in Altamont?
What is the average length of the day in May in Altamont?
When are sunrise and sunset in May in Altamont?
How many hours of sunshine does Altamont have in May?
What is the UV index reading in May in Altamont?
Average temperature in May
Altamont, IL
- Average high temperature in May: 73.6°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in May: 56.8°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in May
Altamont, IL
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Altamont, IL
- Average wind speed in May: 8.3mph
The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in May
Altamont, IL
- Average humidity in May: 80%
The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Altamont, IL
- Average rainfall in May: 2.91"
The wettest month (with the highest rainfall) is April (3.35").
The driest month (with the least rainfall) is February (1.38").
Average rainfall days in May
Altamont, IL
- Average rainfall days in May: 17.5 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in May
Altamont, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (2.01").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Altamont, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Altamont, IL
- Average daylight in May: 14h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in May: 9h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in May
Altamont, IL
- Average sunshine days in May: 10.8 days
The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in May
Altamont, IL
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Altamont, IL
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility in May
Altamont, IL
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Altamont, Illinois, USA
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