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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, in Grantfork, Illinois, is another cold winter month, with an average temperature fluctuating between 36.9°F (2.7°C) and 23.7°F (-4.6°C). Temperature records mark January as the coldest month, with highs averaging 36.9°F (2.7°C) and lows at 23.7°F (-4.6°C). Weather in January »
Weather in February
The last month of the winter, February, is another cold month in Grantfork, Illinois, with an average temperature fluctuating between 27.3°F (-2.6°C) and 41.5°F (5.3°C). The transition from January to February sees average high-temperatures adjusting to a still icy 41.5°F (5.3°C), from a not significantly different 36.9°F (2.7°C). Weather in February »
Weather in March
March, the first month of the spring in Grantfork, is a fresh month, with an average temperature varying between 53.4°F (11.9°C) and 37.2°F (2.9°C). The onset of March brings a temperature shift, with the average high-temperature moving from a cold 41.5°F (5.3°C) in February to a cool 53.4°F (11.9°C). Weather in March »
Weather in April
April is an enjoyable spring month in Grantfork, Illinois, with an average temperature ranging between max 64.2°F (17.9°C) and min 47.3°F (8.5°C). An upsurge in temperatures occurs as March gives way to April, with average highs shifting from a cool 53.4°F (11.9°C) to a refreshing 64.2°F (17.9°C). Weather in April »
Weather in May
The last month of the spring, May, is a warm month in Grantfork, Illinois, with an average temperature varying between 74.3°F (23.5°C) and 57.4°F (14.1°C). The beginning of May signals a rise in the average high-temperature, moving from a comfortable 64.2°F (17.9°C) in April to a moderately hot 74.3°F (23.5°C). Weather in May »
Weather in June
June, the first month of the summer in Grantfork, is still a warm month, with an average temperature ranging between max 83.1°F (28.4°C) and min 66.2°F (19°C). Grantfork's weather in June presents a minor rise in the average high-temperature, moving from a warm 74.3°F (23.5°C) in May to a still moderately hot 83.1°F (28.4°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Grantfork, Illinois, with an average temperature fluctuating between 84.9°F (29.4°C) and 67.6°F (19.8°C). Grantfork's temperatures peak on average in July, reaching 84.9°F (29.4°C) at their highest and 67.6°F (19.8°C) at their lowest. The average heat index in July is evaluated at a fiery hot 96.8°F (36°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Grantfork, Illinois, with an average temperature ranging between max 83.7°F (28.7°C) and min 65.8°F (18.8°C). August commences with an average high-temperature of a still moderately hot 83.7°F (28.7°C), showing little deviation from July's 84.9°F (29.4°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Grantfork, Illinois, with an average temperature ranging between min 59.7°F (15.4°C) and max 78.1°F (25.6°C). The arrival of September is marked by a minor reduction in average high-temperature, sliding from a warm 83.7°F (28.7°C) in August to a still moderately hot 78.1°F (25.6°C). Weather in September »
Weather in October
October, like September, in Grantfork, Illinois, is another refreshing autumn month, with an average temperature varying between 48.9°F (9.4°C) and 65.7°F (18.7°C). In October, the meteorological conditions alter, with the average high-temperature shifting from a warm 78.1°F (25.6°C) in September to an enjoyable 65.7°F (18.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Grantfork, Illinois, with an average temperature varying between 37.4°F (3°C) and 52.3°F (11.3°C). The arrival of November signals a shift in temperature, down from a comfortable 65.7°F (18.7°C) in October to a cool 52.3°F (11.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Grantfork, Illinois, with an average temperature varying between 30°F (-1.1°C) and 41.5°F (5.3°C). The onset of December introduces a moderate change in Grantfork's weather, with average high-temperatures falling from November's fresh 52.3°F (11.3°C) to an icy 41.5°F (5.3°C). Weather in December »
Updated: Jul 2, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
Grantfork's January weather, marked by an average high temperature of 36.9°F (2.7°C) and an average low temperature of 23.7°F (-4.6°C), is the coldest in the year.
How much does it rain?
Throughout the year, there are 110.6 rainfall days, and 12.01" (305mm) of precipitation is accumulated.
When does it snow in Grantfork?
Months with snowfall are January through March, October through December.
How much does it snow?
In Grantfork, during the entire year, snow falls for 15.9 days and aggregates up to 2.32" (59mm) of snow.
What is the month with the least sunshine?
January and February, with an average of 4.6h of sunshine, are months with the least sunshine.
What is the month with the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the driest month in Grantfork?
The month with the least rainfall is February, when the rain falls for 6.1 days and typically collects 0.55" (14mm) of precipitation.
When is Daylight Saving Time (DST) in Grantfork?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
When it does not snow in Grantfork?
April through September are months without snowfall.
What is the rainiest month?
May is the month with the most rainfall. Rain falls for 13.1 days and accumulates 1.46" (37mm) of precipitation.
What is the month with the highest UV index in Grantfork?
May through August, with an average maximum UV index of 6, are months with the highest UV index.
When are the longest days?
With an average of 14h and 48min of daylight, June has the longest days of the year.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 10.6h of sunshine.
What time of the year is the hottest?
July is the month that records the highest temperatures, with averages ranging from a high of 84.9°F (29.4°C) to a low of 67.6°F (19.8°C).
What is the most humid month?
July and August, with an average relative humidity of 80%, are most humid months.
What is the least humid month in Grantfork?
The least humid month is October, with an average relative humidity of 71%.
When does it snow the most?
December is the month with the most snowfall. Snow falls for 3.1 days and accumulates 0.94" (24mm) of snow.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 30min of daylight.
Average temperature
Grantfork, IL
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).
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
Grantfork, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.13"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
Grantfork, IL
- Average wind speed in January:
9.8mph - Average wind speed in February:
9.6mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.3mph - Average wind speed in May:
7.7mph - Average wind speed in June:
6.7mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.7mph - Average wind speed in September:
6.2mph - Average wind speed in October:
8.2mph - Average wind speed in November:
8.9mph - Average wind speed in December:
8.9mph
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
Grantfork, IL
The months with the highest relative humidity are July and August (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Grantfork, IL
- Average rainfall in January:
0.91" - Average rainfall in February:
0.55" - Average rainfall in March:
0.91" - Average rainfall in April:
1.3" - Average rainfall in May:
1.46" - Average rainfall in June:
1.3"
- Average rainfall in July:
1.34" - Average rainfall in August:
1.14" - Average rainfall in September:
0.59" - Average rainfall in October:
1.02" - Average rainfall in November:
0.71" - Average rainfall in December:
0.79"
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
Grantfork, IL
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
6.1 days - Average rainfall days in March:
10.2 days - Average rainfall days in April:
12 days - Average rainfall days in May:
13.1 days - Average rainfall days in June:
11.1 days
- Average rainfall days in July:
12.9 days - Average rainfall days in August:
9.7 days - Average rainfall days in September:
9.5 days - Average rainfall days in October:
7.3 days - Average rainfall days in November:
6.9 days - Average rainfall days in December:
5.9 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
Grantfork, IL
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
Grantfork, IL
- Average snowfall days in January:
4.8 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
1.7 days - Average snowfall days in April:
0.2 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.2 days - Average snowfall days in December:
3.1 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 / Average sunshine
Grantfork, IL
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 3min
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 January:
4h and 4min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 3min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 4min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 3min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 5min
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
Grantfork, IL
- Average sunshine days in January:
21.3 days - Average sunshine days in February:
18.3 days - Average sunshine days in March:
17.4 days - Average sunshine days in April:
16.2 days - Average sunshine days in May:
14.8 days - Average sunshine days in June:
15.6 days
- Average sunshine days in July:
14.5 days - Average sunshine days in August:
17.3 days - Average sunshine days in September:
18.3 days - Average sunshine days in October:
21.5 days - Average sunshine days in November:
20.9 days - Average sunshine days in December:
21.8 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
Grantfork, IL
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
Grantfork, IL
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
Grantfork, IL
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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