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
Grantfork, Illinois, experiences a temperature shift with the start of May, with average high-temperatures moving from a comfortable 64.2°F (17.9°C) in April to a moderately hot 74.3°F (23.5°C). May nights experience a consistent temperature drop to a refreshing 57.4°F (14.1°C).Humidity
In Grantfork, the average relative humidity in May is 79%.Rainfall
The month with the most rainfall in Grantfork is May, when the rain falls for 13.1 days and typically aggregates up to 1.46" (37mm) of precipitation.Snowfall
In Grantfork, snow does not fall in April through September.Daylight
In Grantfork, the average length of the day in May is 14h and 19min.On the first day of May in Grantfork, sunrise is at 5:59 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 5:35 am and sunset at 8:17 pm CDT.
Sunshine
In May, the average sunshine in Grantfork is 9.4h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 6 in May interprets into the following advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Frequently asked questions
What is the usual temperature for Grantfork in May?
What is the average humidity in May in Grantfork?
What is the wettest month in Grantfork?
How many days does it rain in May in Grantfork?
When it does not snow in Grantfork?
What is the average length of the day in May in Grantfork?
When are sunrise and sunset in May in Grantfork?
How many hours of sunshine does Grantfork have in May?
What are the months with the highest UV index in Grantfork?
How high is the UV index in May in Grantfork?
Average temperature in May
Grantfork, 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
Grantfork, 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
Grantfork, 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
Grantfork, 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
Grantfork, 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
Grantfork, 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
Grantfork, 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
Grantfork, 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
Grantfork, IL
- Average daylight in May: 14h and 2min
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 2min
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
Grantfork, 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
Grantfork, 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
Grantfork, 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
Grantfork, 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).
Grantfork, Illinois, USA
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