May weather forecastSaint Jacob, IL
May
Weather in May
May, the last month of the spring in Saint Jacob, is a moderately hot month, with an average temperature ranging between min 57.4°F (14.1°C) and max 74.3°F (23.5°C).Temperature
May shows a rise in the average high-temperature, moving from April's comfortable 64.2°F (17.9°C) to a moderately hot 74.3°F (23.5°C). An average nighttime temperature of 57.4°F (14.1°C) is recorded during May.Humidity
In Saint Jacob, Illinois, the average relative humidity in May is 79%.Rainfall
The month with the most rainfall is May, when the rain falls for 13.1 days and typically aggregates up to 1.46" (37mm) of precipitation.Snowfall
In Saint Jacob, snow does not fall in April through September.Daylight
In Saint Jacob, the average length of the day in May is 14h and 18min.On the first day of May, sunrise is at 6:00 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 8:17 pm CDT.
Sunshine
In Saint Jacob, the average sunshine in May is 9.4h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index in Saint Jacob. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.Note: In May, the maximum UV index of 6 translates into these guidelines:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Saint Jacob, IL
- Average high temperature in May: 74.3°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in May: 57.4°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).
Average pressure in May
Saint Jacob, 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 (29.92"Hg).
Average wind speed in May
Saint Jacob, IL
- Average wind speed in May: 7.7mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in May
Saint Jacob, IL
- Average humidity in May: 79%
The months with the highest relative humidity are July and August (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Saint Jacob, IL
- Average rainfall in May: 1.46"
The wettest month (with the highest rainfall) is May (1.46").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days in May
Saint Jacob, IL
- Average rainfall days in May: 13.1 days
The month with the highest number of rainy days is May (13.1 days).
The months with the least rainy days are January and December (5.9 days).
Average snowfall in May
Saint Jacob, IL
- Average snowfall in May: 0"
The month with the highest snowfall is December (0.94").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in May
Saint Jacob, IL
- Average snowfall days in May: 0 days
The months with the highest number of snowfall days are January and February (4.8 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
Saint Jacob, IL
- Average daylight in May: 14h and 18min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in May: 9h and 24min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days in May
Saint Jacob, IL
- Average sunshine days in May: 14.8 days
The month with the most sunshine days is December (21.8 days).
The month with the least sunshine days is July (14.5 days).
Average UV index in May
Saint Jacob, IL
- Average UV index in May: 6
The months with the highest UV index are May, 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
Saint Jacob, IL
- Average cloud cover in May: 37
The months with the most cloud cover are January and February (Cloud cover 50).
The months with the least cloud cover are June, July, August and September (Cloud cover 28).
Average visibility in May
Saint Jacob, 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).
