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
In May, the average high-temperature increases from an enjoyable 63.1°F (17.3°C) in April to an agreeable 73°F (22.8°C). During the month of May, an average low-temperature of 55.9°F (13.3°C) is recorded in Old Saint Louis.Humidity
In Old Saint Louis, Indiana, the average relative humidity in May is 80%.Rainfall
The month with the most rainfall in Old Saint Louis is May, when the rain falls for 18.3 days and typically aggregates up to 3.5" (89mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In Old Saint Louis, the average length of the day in May is 14h and 21min.On the first day of the month, sunrise is at 6:43 am and sunset at 8:36 pm. On the last day of May, sunrise is at 6:18 am and sunset at 9:03 pm EDT.
Sunshine
In Old Saint Louis, the average sunshine in May is 8.8h.UV index
In Old Saint Louis, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 5 during May translates into the following recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Old Saint Louis in May?
What is the average humidity in May in Old Saint Louis?
What is the rainiest month in Old Saint Louis?
How much does it rain in Old Saint Louis in May?
When it does not snow in Old Saint Louis?
Does it snow in Old Saint Louis in May?
What is the average length of the day in May in Old Saint Louis?
When are sunrise and sunset in May in Old Saint Louis?
How many hours of sunshine does Old Saint Louis have in May?
What is the UV index reading in May in Old Saint Louis?
Average temperature in May
Old Saint Louis, IN
- Average high temperature in May: 73°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in May: 55.9°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in May
Old Saint Louis, IN
- Average pressure in May: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Old Saint Louis, IN
- Average wind speed in May: 7.1mph
The windiest months (with the highest average wind speed) are January and February (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in May
Old Saint Louis, IN
- Average humidity in May: 80%
The months with the highest relative humidity are January, February, July and December (81%).
The month with the lowest relative humidity is October (74%).
Average rainfall in May
Old Saint Louis, IN
- Average rainfall in May: 3.5"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in May
Old Saint Louis, IN
- Average rainfall days in May: 18.3 days
The month with the highest number of rainy days is May (18.3 days).
The months with the least rainy days are January and February (9.4 days).
Average snowfall in May
Old Saint Louis, IN
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Old Saint Louis, IN
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (9.6 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
Old Saint Louis, IN
- 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: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in May
Old Saint Louis, IN
- Average sunshine days in May: 10.3 days
The month with the most sunshine days is October (17.7 days).
The month with the least sunshine days is May (10.3 days).
Average UV index in May
Old Saint Louis, IN
- 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
Old Saint Louis, IN
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in May
Old Saint Louis, IN
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are July and December (5mi).
Old Saint Louis, Indiana, USA
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