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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 Grand Tower, Illinois, is an icy winter month, with temperature in the range of an average high of 39.6°F (4.2°C) and an average low of 26.2°F (-3.2°C). January, characterized by an average high temperature of 39.6°F (4.2°C) and a low temperature of 26.2°F (-3.2°C), is generally the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is a chilly month in Grand Tower, Illinois, with temperature in the range of an average low of 30°F (-1.1°C) and an average high of 43.7°F (6.5°C). The shift to February signals an average high-temperature of a frosty 43.7°F (6.5°C), subtly varied from January's 39.6°F (4.2°C). Weather in February »
Weather in March
March, the first month of the spring in Grand Tower, is a fresh month, with an average temperature fluctuating between 38.8°F (3.8°C) and 55.2°F (12.9°C). Grand Tower sees an increase in average high-temperatures during March, moving from a chilly 43.7°F (6.5°C) in February to a cool 55.2°F (12.9°C). Weather in March »
Weather in April
April in Grand Tower, Illinois, is a comfortable spring month, with temperature in the range of an average low of 48.6°F (9.2°C) and an average high of 66.2°F (19°C). As April begins, there is an increase in the average high-temperature, moving from a fresh 55.2°F (12.9°C) in March to a comfortable 66.2°F (19°C). Weather in April »
Weather in May
May, the last month of the spring in Grand Tower, is a warm month, with temperature in the range of an average high of 75.7°F (24.3°C) and an average low of 58.3°F (14.6°C). May's onset brings a temperature rise, moving from a refreshing 66.2°F (19°C) in April to a warm 75.7°F (24.3°C). Weather in May »
Weather in June
June, the first month of the summer in Grand Tower, is still a warm month, with an average temperature ranging between max 84.7°F (29.3°C) and min 66.4°F (19.1°C). As June arrives, Grand Tower's weather shows an increase in high-temperatures, moving from May's warm 75.7°F (24.3°C) to a still moderately hot 84.7°F (29.3°C). Weather in June »
Weather in July
July in Grand Tower, Illinois, is a hot summer month, with temperature in the range of an average low of 68.7°F (20.4°C) and an average high of 87.4°F (30.8°C). July, on average, is the warmest month, registering a high temperature of 87.4°F (30.8°C) and a low of 68.7°F (20.4°C). During July, the heat index is estimated at a sweltering 102.2°F (39°C). Weather in July »
Weather in August
August, the last month of the summer in Grand Tower, is another warm month, with an average temperature ranging between max 85.8°F (29.9°C) and min 66.4°F (19.1°C). The onset of August marks an average high-temperature of a warm 85.8°F (29.9°C), hardly differing from July's 87.4°F (30.8°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Grand Tower, Illinois, with an average temperature fluctuating between 60.3°F (15.7°C) and 80.4°F (26.9°C). Start of September brings a slight shift in the average high-temperature, dipping a bit from August's moderately hot 85.8°F (29.9°C) to a still warm 80.4°F (26.9°C). Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Grand Tower, Illinois, with an average temperature ranging between max 67.5°F (19.7°C) and min 49.3°F (9.6°C). The beginning of October marks a decrease in the average high-temperature, transitioning from a warm 80.4°F (26.9°C) in September to a comfortable 67.5°F (19.7°C). Weather in October »
Weather in November
November, the last month of the autumn in Grand Tower, is another cool month, with an average temperature varying between 54°F (12.2°C) and 38.7°F (3.7°C). The beginning of November involves a decrease in the average high-temperature, transitioning from a comfortable 67.5°F (19.7°C) in October to a cool 54°F (12.2°C). Weather in November »
Weather in December
December, the first month of the winter in Grand Tower, is still a chilly month, with an average temperature ranging between max 43.7°F (6.5°C) and min 31.8°F (-0.1°C). December's onset corresponds with a shift in the average high-temperature, moving from a fresh 54°F (12.2°C) in November to a frosty 43.7°F (6.5°C). Weather in December »
Updated: Feb 12, 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 part of the year is the coldest in Grand Tower?
January, with average temperatures reaching a high of 39.6°F (4.2°C) and a low of 26.2°F (-3.2°C), is the coldest month in Grand Tower.
How many days does it rain in Grand Tower?
In Grand Tower, during the entire year, the rain falls for 158.6 days and collects up to 34.69" (881mm) of precipitation.
When does it snow in Grand Tower?
January through April, October through December are months with snowfall.
How many days does it snow in Grand Tower?
In Grand Tower, during the entire year, snow falls for 15.9 days and aggregates up to 5.71" (145mm) of snow.
What is the month with the least sunshine in Grand Tower?
With an average of 4.7h of sunshine, January has the least sunshine of the year.
What are the months with the lowest UV index in Grand Tower?
The months with the lowest UV index in Grand Tower, Illinois, are January, February, November and December, with an average maximum UV index of 2.
What is the snowiest month in Grand Tower?
February is the month with the most snowfall. Snow falls for 4.8 days and accumulates 1.73" (44mm) of snow.
When is Daylight Saving Time (DST) in Grand Tower?
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.
What is the wettest month in Grand Tower?
April is the month with the most rainfall. Rain falls for 15.5 days and accumulates 4.49" (114mm) of precipitation.
What is the most humid month in Grand Tower?
May is the most humid month in Grand Tower, with an average relative humidity of 79%.
When it does not snow in Grand Tower?
In Grand Tower, Illinois, snow does not fall in May through September.
When is the highest UV index in Grand Tower?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When are the longest days in Grand Tower?
June has the longest days of the year in Grand Tower, with an average of 14h and 42min of daylight.
What month has the most sunshine in Grand Tower?
June has the most sunshine of the year in Grand Tower, with an average of 10.6h of sunshine.
What month is the hottest in Grand Tower?
July, characterized by an average high temperature of 87.4°F (30.8°C) and a low temperature of 68.7°F (20.4°C), is generally the warmest month in Grand Tower, Illinois.
What is the driest month in Grand Tower?
September is the month with the least rainfall in Grand Tower. Rain falls for 12.7 days and accumulates 1.85" (47mm) of precipitation.
What is the least humid month in Grand Tower?
October is the least humid month, with an average relative humidity of 71%.
What is the month with the shortest days in Grand Tower?
The month with the shortest days is December, with an average of 9h and 36min of daylight.
Average temperature
Grand Tower, IL
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure
Grand Tower, 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:
29.95"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.14"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
Grand Tower, IL
- Average wind speed in January:
9.4mph - Average wind speed in February:
9.3mph - Average wind speed in March:
9.1mph - Average wind speed in April:
8.9mph - Average wind speed in May:
7.5mph - Average wind speed in June:
6.5mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.6mph - Average wind speed in September:
6.2mph - Average wind speed in October:
7.8mph - Average wind speed in November:
8.5mph - Average wind speed in December:
8.6mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity
Grand Tower, IL
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Grand Tower, IL
- Average rainfall in January:
2.17" - Average rainfall in February:
2.36" - Average rainfall in March:
3.11" - Average rainfall in April:
4.49" - Average rainfall in May:
3.82" - Average rainfall in June:
3.43"
The wettest month (with the highest rainfall) is April (4.49").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days
Grand Tower, IL
- Average rainfall days in January:
9.4 days - Average rainfall days in February:
10.3 days - Average rainfall days in March:
15.2 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
13.9 days - Average rainfall days in September:
12.7 days - Average rainfall days in October:
10.8 days - Average rainfall days in November:
10.6 days - Average rainfall days in December:
10.3 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.4 days).
Average snowfall
Grand Tower, IL
The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Grand Tower, IL
- Average snowfall days in January:
4.8 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
1.8 days - Average snowfall days in April:
0.4 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 days - Average snowfall days in December:
3 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
Grand Tower, 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 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 3min - 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 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 4min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 4min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 3min - Average sunshine in October:
6h and 3min - 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 month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days
Grand Tower, IL
- Average sunshine days in January:
17.7 days - Average sunshine days in February:
13.6 days - Average sunshine days in March:
13.4 days - Average sunshine days in April:
12.3 days - Average sunshine days in May:
11.3 days - Average sunshine days in June:
12.2 days
- Average sunshine days in July:
11.7 days - Average sunshine days in August:
14.2 days - Average sunshine days in September:
16 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
17.9 days - Average sunshine days in December:
18.4 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (11.3 days).
Average UV index
Grand Tower, 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
Grand Tower, IL
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 27).
Average visibility
Grand Tower, 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).
Grand Tower, Illinois, USA
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