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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, the same as December, is an icy winter month in Granite City, Illinois, with temperature in the range of an average high of 37.2°F (2.9°C) and an average low of 24.3°F (-4.3°C). The month of January sees the lowest average temperatures, reaching 37.2°F (2.9°C) at the peak and 24.3°F (-4.3°C) at the low. Weather in January »
Weather in February
The last month of the winter, February, is also a wintry month in Granite City, Illinois, with an average temperature varying between 27.5°F (-2.5°C) and 42.3°F (5.7°C). February begins with an average high-temperature of a still icy 42.3°F (5.7°C), reflecting close similarity to the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a cool month in Granite City, Illinois, with an average temperature ranging between min 37.9°F (3.3°C) and max 54.1°F (12.3°C). March's onset witnesses a shift in the average high-temperature, moving from an icy 42.3°F (5.7°C) in February to a cool 54.1°F (12.3°C). Weather in March »
Weather in April
April in Granite City, Illinois, is a refreshing spring month, with an average temperature varying between 65.1°F (18.4°C) and 48°F (8.9°C). In Granite City, the average high-temperature in April rises, from a cool 54.1°F (12.3°C) in March, to a comfortable 65.1°F (18.4°C). Weather in April »
Weather in May
The last month of the spring, May, is a warm month in Granite City, Illinois, with an average temperature varying between 74.7°F (23.7°C) and 57.7°F (14.3°C). Granite City in May shows a temperature shift, moving from an average high of a refreshing 65.1°F (18.4°C) in April to a moderately hot 74.7°F (23.7°C). Weather in May »
Weather in June
June, the first month of the summer in Granite City, is also a moderately hot month, with an average temperature ranging between min 66.7°F (19.3°C) and max 83.8°F (28.8°C). As Granite City transitions into June, a rise in the average high-temperature is observed, moving from 74.7°F (23.7°C) in May to a still warm 83.8°F (28.8°C). Weather in June »
Weather in July
July is a hot summer month in Granite City, Illinois, with an average temperature varying between 86.2°F (30.1°C) and 68.5°F (20.3°C). The warmest month is July, with an average high-temperature of 86.2°F (30.1°C) and an average low-temperature of 68.5°F (20.3°C). For most parts of July, the heat index is estimated at a very hot 98.6°F (37°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Granite City, Illinois, with an average temperature varying between 66.7°F (19.3°C) and 84.7°F (29.3°C). Granite City experiences an average high-temperature of a warm 84.7°F (29.3°C) with the onset of August, subtly varied from July's 86.2°F (30.1°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Granite City, Illinois, with an average temperature varying between 79.3°F (26.3°C) and 59.9°F (15.5°C). September reveals a small adjustment in temperature, transitioning from an average high of a moderately hot 84.7°F (29.3°C) in August to a still warm 79.3°F (26.3°C). Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Granite City, Illinois, with an average temperature ranging between min 49.3°F (9.6°C) and max 66.2°F (19°C). October ushers in a slight temperature change, with average high-temperatures reducing from September's moderately hot 79.3°F (26.3°C) to a comfortable 66.2°F (19°C). Weather in October »
Weather in November
November, the last month of the autumn in Granite City, is another cool month, with an average temperature varying between 37.9°F (3.3°C) and 52.9°F (11.6°C). A decrease in the average high-temperature is observed during November, shifting from a refreshing 66.2°F (19°C) in October to a cool 52.9°F (11.6°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Granite City, Illinois, with an average temperature ranging between max 41.9°F (5.5°C) and min 30.2°F (-1°C). The onset of December introduces a moderate change in Granite City's weather, with average high-temperatures falling from November's fresh 52.9°F (11.6°C) to an icy 41.9°F (5.5°C). Weather in December »
[Resources]Frequently asked questions
What part of the year is the coldest in Granite City?
January is the coldest month in Granite City, Illinois, with an average high-temperature of 37.2°F (2.9°C) and an average low-temperature of 24.3°F (-4.3°C).
How many days does it rain in Granite City?
Throughout the year, there are 159.5 rainfall days, and 36.06" (916mm) of precipitation is accumulated.
When does it snow in Granite City?
January through March, November and December are months with snowfall.
How much does it snow in Granite City?
Throughout the year, there are 20.3 snowfall days, and 8.07" (205mm) of snow is accumulated.
What is the month with the least sunshine in Granite City?
The month with the least sunshine is January, with an average of 4.6h of sunshine.
What are the months with the lowest UV index in Granite City?
The months with the lowest UV index in Granite City, Illinois, are January, February, November and December, with an average maximum UV index of 2.
What is the driest month in Granite City?
The month with the least rainfall in Granite City, Illinois, is February, when the rain falls for 8.8 days and typically collects 1.93" (49mm) of precipitation.
When does it snow the most in Granite City?
February is the month with the most snowfall in Granite City, Illinois. Snow falls for 5.8 days and accumulates 2.4" (61mm) of snow.
When is Daylight Saving Time (DST) in Granite City?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Granite City, 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 Granite City?
In Granite City, Illinois, snow does not fall in April through October.
What is the most humid month in Granite City?
May is the most humid month, with an average relative humidity of 78%.
What is the rainiest month in Granite City?
May is the month with the most rainfall in Granite City, Illinois. Rain falls for 17.8 days and accumulates 4.21" (107mm) of precipitation.
What are the months with the highest UV index in Granite City?
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 Granite City?
June has the longest days of the year in Granite City, Illinois, with an average of 14h and 48min of daylight.
What month has the most sunshine in Granite City?
The month with the most sunshine is June, with an average of 10.5h of sunshine.
What time of the year is the hottest in Granite City?
Granite City's July weather, marked by an average high temperature of 86.2°F (30.1°C) and an average low temperature of 68.5°F (20.3°C), is the warmest in the year.
What is the least humid month in Granite City?
The least humid month in Granite City is October, with an average relative humidity of 71%.
What is the month with the shortest days in Granite City?
The month with the shortest days in Granite City, Illinois, is December, with an average of 9h and 30min of daylight.
Average temperature
Granite City, IL
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (37.2°F).
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure
Granite City, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"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:
30.12"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
Granite City, 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:
9mph - Average wind speed in May:
7.3mph - Average wind speed in June:
6.5mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.6mph - Average wind speed in September:
6.1mph - Average wind speed in October:
7.9mph - Average wind speed in November:
8.5mph - Average wind speed in December:
8.7mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).
Average humidity
Granite City, IL
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Granite City, IL
- Average rainfall in January:
2.2" - Average rainfall in February:
1.93" - Average rainfall in March:
2.68" - Average rainfall in April:
4.06" - Average rainfall in May:
4.21" - Average rainfall in June:
4.09"
- Average rainfall in July:
3.58" - Average rainfall in August:
3.82" - Average rainfall in September:
2.28" - Average rainfall in October:
2.83" - Average rainfall in November:
2.05" - Average rainfall in December:
2.32"
The wettest month (with the highest rainfall) is May (4.21").
The driest month (with the least rainfall) is February (1.93").
Average rainfall days
Granite City, IL
- Average rainfall days in January:
8.4 days - Average rainfall days in February:
8.8 days - Average rainfall days in March:
14.4 days - Average rainfall days in April:
16.1 days - Average rainfall days in May:
17.8 days - Average rainfall days in June:
16.8 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
15.3 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
11.2 days - Average rainfall days in November:
10.2 days - Average rainfall days in December:
9.2 days
The months with the highest number of rainy days are May and July (17.8 days).
The month with the least rainy days is January (8.4 days).
Average snowfall
Granite City, IL
The month with the highest snowfall is February (2.4").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Granite City, IL
- Average snowfall days in January:
6.3 days - Average snowfall days in February:
5.8 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.3 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:
1.5 days - Average snowfall days in December:
4 days
The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Granite City, 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 4min - Average sunshine in May:
9h and 3min - Average sunshine in June:
10h and 3min
- 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 1min - 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 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days
Granite City, IL
- Average sunshine days in January:
17.2 days - Average sunshine days in February:
14.1 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
11.8 days - Average sunshine days in May:
10.7 days - Average sunshine days in June:
10.1 days
- Average sunshine days in July:
10.3 days - Average sunshine days in August:
12.5 days - Average sunshine days in September:
13.9 days - Average sunshine days in October:
17.6 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
18 days
The month with the most sunshine days is December (18 days).
The month with the least sunshine days is June (10.1 days).
Average UV index
Granite City, 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
Granite City, IL
The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 28).
Average visibility
Granite City, 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).
Granite City, Illinois, USA
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