Climate and monthly weather forecastCary, IL
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Cary, Illinois, with an average temperature fluctuating between 27°F (-2.8°C) and 15.3°F (-9.3°C). In Cary, the month of January is known for its lowest average temperatures, reaching a high of 27°F (-2.8°C) and a low of 15.3°F (-9.3°C). Weather in January »Weather in February
February, the last month of the winter in Cary, is also a subzero cold month, with an average temperature fluctuating between 18°F (-7.8°C) and 30.6°F (-0.8°C). The transition into February notes an average high-temperature of a still subzero cold 30.6°F (-0.8°C), revealing a mild distinction from the 27°F (-2.8°C) in January. Weather in February »Weather in March
March, the first month of the spring in Cary, is a chilly month, with an average temperature fluctuating between 29.7°F (-1.3°C) and 43.5°F (6.4°C). Cary's transition into March is marked by a temperature shift, moving from a freezing cold 30.6°F (-0.8°C) in February to a chilly 43.5°F (6.4°C). Weather in March »Weather in April
April in Cary, Illinois, is a fresh spring month, with an average temperature ranging between max 54.7°F (12.6°C) and min 38.8°F (3.8°C). As March transitions into April, a change in temperatures is observed, with average highs moving from a frosty 43.5°F (6.4°C) to a cool 54.7°F (12.6°C). Weather in April »Weather in May
May, the last month of the spring in Cary, is a refreshing month, with an average temperature varying between 49.8°F (9.9°C) and 66.7°F (19.3°C). May witnesses an increase in the average high-temperature, moving from a cool 54.7°F (12.6°C) in April to a refreshing 66.7°F (19.3°C). Weather in May »Weather in June
June, the first month of the summer in Cary, is a warm month, with an average temperature varying between 76.1°F (24.5°C) and 59.2°F (15.1°C). The arrival of June sees a shift in the average high-temperature, moving from a refreshing 66.7°F (19.3°C) in May to a moderately hot 76.1°F (24.5°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Cary, Illinois, with an average temperature varying between 79.9°F (26.6°C) and 63.5°F (17.5°C). July is the warmest month, with an average high-temperature of 79.9°F (26.6°C) and an average low-temperature of 63.5°F (17.5°C). Weather in July »Weather in August
August, the last month of the summer in Cary, is also a moderately hot month, with an average temperature varying between 78.4°F (25.8°C) and 62.2°F (16.8°C). Cary's transition from July to August introduces an average high-temperature of a still warm 78.4°F (25.8°C), marking an insignificant variation from the 79.9°F (26.6°C). Weather in August »Weather in September
The first month of the autumn, September, is also an agreeable month in Cary, Illinois, with an average temperature varying between 72.5°F (22.5°C) and 55.8°F (13.2°C). September heralds a minor drop in average high-temperature, sliding from August's warm 78.4°F (25.8°C) to a pleasant 72.5°F (22.5°C). Weather in September »Weather in October
October, like September, is a moderate autumn month in Cary, Illinois, with an average temperature ranging between min 44.2°F (6.8°C) and max 59°F (15°C). Observing a mild shift, the average high-temperature during October reduces from September's agreeable 72.5°F (22.5°C) to a moderate 59°F (15°C). Weather in October »Weather in November
The last month of the autumn, November, is also a frosty month in Cary, Illinois, with an average temperature ranging between min 32.4°F (0.2°C) and max 45.1°F (7.3°C). The arrival of November corresponds with a shift in temperature, down from a mild 59°F (15°C) in October to a chilly 45.1°F (7.3°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Cary, Illinois, with an average temperature varying between 33.3°F (0.7°C) and 23.2°F (-4.9°C). As December arrives, Cary's weather displays a decrease in high-temperatures, transitioning from November's chilly 45.1°F (7.3°C) to a cold 33.3°F (0.7°C). Weather in December »Updated: Jul 24, 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
Cary's coldest month, January, registers temperatures that range from a high of 27°F (-2.8°C) to a low of 15.3°F (-9.3°C).
The months with the highest humidity are January and February, with an average relative humidity of 84%.
In Cary, during the entire year, the rain falls for 151.2 days and collects up to 24.17" (614mm) of precipitation.
January through May, October through December are months with snowfall.
January is the month with the most snowfall. Snow falls for 13.2 days and accumulates 3.82" (97mm) of snow.
In Cary, during the entire year, snow falls for 48.9 days and aggregates up to 14.76" (375mm) of snow.
With an average of 3.6h of sunshine, January has the least sunshine of the year in Cary.
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
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.
June is the month with the most rainfall. Rain falls for 17.2 days and accumulates 3.15" (80mm) of precipitation.
June through September are months without snowfall in Cary.
June has the longest days of the year, with an average of 15h and 12min of daylight.
July brings the highest temperatures, with an average high of 79.9°F (26.6°C) and an average low of 63.5°F (17.5°C).
With an average of 10h of sunshine, July has the most sunshine of the year.
With an average maximum UV index of 6, August is the month with the highest UV index.
The least humid month is October, with an average relative humidity of 75%.
The month with the least rainfall in Cary is December, when the rain falls for 8 days and typically collects 1.1" (28mm) of precipitation.
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Cary, IL
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (27°F).
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure
Cary, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"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:
30.03"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Cary, IL
- Average wind speed in January:
10mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.6mph - Average wind speed in April:
9.8mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.2mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.2mph - Average wind speed in October:
8.8mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.3mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity
Cary, IL
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is October (75%).
Average rainfall
Cary, IL
- Average rainfall in January:
1.3" - Average rainfall in February:
1.34" - Average rainfall in March:
1.42" - Average rainfall in April:
2.83" - Average rainfall in May:
2.83" - Average rainfall in June:
3.15"
- Average rainfall in July:
2.52" - Average rainfall in August:
2.68" - Average rainfall in September:
1.69" - Average rainfall in October:
2.09" - Average rainfall in November:
1.22" - Average rainfall in December:
1.1"
The wettest month (with the highest rainfall) is June (3.15").
The driest month (with the least rainfall) is December (1.1").
Average rainfall days
Cary, IL
- Average rainfall days in January:
5.3 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
11.7 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
18.1 days - Average rainfall days in June:
17.2 days
- Average rainfall days in July:
18.8 days - Average rainfall days in August:
16.3 days - Average rainfall days in September:
12.4 days - Average rainfall days in October:
13.7 days - Average rainfall days in November:
8.9 days - Average rainfall days in December:
8 days
The month with the highest number of rainy days is July (18.8 days).
The months with the least rainy days are January and February (5.3 days).
Average snowfall
Cary, IL
- Average snowfall in January:
3.82" - Average snowfall in February:
3.43" - Average snowfall in March:
1.77" - Average snowfall in April:
1.97" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is January (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Cary, IL
- Average snowfall days in January:
13.2 days - Average snowfall days in February:
10.8 days - Average snowfall days in March:
7.2 days - Average snowfall days in April:
2.4 days - Average snowfall days in May:
0.1 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:
0.5 days - Average snowfall days in November:
3.9 days - Average snowfall days in December:
10.8 days
The month with the highest number of snowfall days is January (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Cary, IL
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 36min - Average sunshine in February:
3h and 48min - Average sunshine in March:
6h and 6min - Average sunshine in April:
7h and 30min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 54min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Cary, IL
- Average sunshine days in January:
13.7 days - Average sunshine days in February:
11.6 days - Average sunshine days in March:
13.9 days - Average sunshine days in April:
10.8 days - Average sunshine days in May:
10.3 days - Average sunshine days in June:
10 days
- Average sunshine days in July:
10.4 days - Average sunshine days in August:
10.6 days - Average sunshine days in September:
14.2 days - Average sunshine days in October:
14.2 days - Average sunshine days in November:
16.2 days - Average sunshine days in December:
14.8 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (10 days).
Average UV index
Cary, IL
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Cary, IL
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility
Cary, IL
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
