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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, is a freezing cold winter month in Cortland, Illinois, with an average temperature varying between 27°F (-2.8°C) and 15.1°F (-9.4°C). In Cortland, the month of January registers the lowest temperatures, averaging 27°F (-2.8°C) at the peak and 15.1°F (-9.4°C) at the lowest. Weather in January »
Weather in February
February, the last month of the winter in Cortland, is also a subzero cold month, with an average temperature fluctuating between 31.1°F (-0.5°C) and 18.1°F (-7.7°C). Cortland's shift from January to February is accompanied by an average high-temperature of a still subzero cold 31.1°F (-0.5°C), a slight deviation from 27°F (-2.8°C). Weather in February »
Weather in March
March, the first month of the spring in Cortland, is a frosty month, with temperature in the range of an average low of 30.2°F (-1°C) and an average high of 44.6°F (7°C). The arrival of March brings an increase in high-temperatures, moving from a subzero cold 31.1°F (-0.5°C) in February to a chilly 44.6°F (7°C). Weather in March »
Weather in April
April in Cortland, Illinois, is a refreshing spring month, with an average temperature fluctuating between 39.9°F (4.4°C) and 56.7°F (13.7°C). The arrival of April brings an increase in high-temperatures, moving from a chilly 44.6°F (7°C) in March to a moderate 56.7°F (13.7°C). Weather in April »
Weather in May
May, the last month of the spring in Cortland, is a pleasant month, with an average temperature varying between 68.7°F (20.4°C) and 51.4°F (10.8°C). Cortland's weather in May presents a rise in the average high-temperature, moving from a mild 56.7°F (13.7°C) in April to an agreeable 68.7°F (20.4°C). Weather in May »
Weather in June
June, the first month of the summer in Cortland, is a warm month, with an average temperature ranging between max 77.7°F (25.4°C) and min 60.1°F (15.6°C). With the onset of June, Cortland's average high-temperature sees a rise, moving from May's pleasant 68.7°F (20.4°C) to a warm 77.7°F (25.4°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Cortland, Illinois, with temperature in the range of an average high of 80.2°F (26.8°C) and an average low of 63.1°F (17.3°C). The month of July sees the highest average temperatures, reaching 80.2°F (26.8°C) at the peak and 63.1°F (17.3°C) at the low. Weather in July »
Weather in August
August, the last month of the summer in Cortland, is also a moderately hot month, with temperature in the range of an average high of 78.4°F (25.8°C) and an average low of 61.2°F (16.2°C). The transition into August shows a subtle variation to a still warm 78.4°F (25.8°C) from July's 80.2°F (26.8°C) in the average high-temperature. Weather in August »
Weather in September
September, the first month of the autumn in Cortland, is also an agreeable month, with an average temperature varying between 73°F (22.8°C) and 54.5°F (12.5°C). The beginning of September brings a minor change in the average high-temperature, shifting from a moderately hot 78.4°F (25.8°C) in August to an agreeable 73°F (22.8°C). Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Cortland, Illinois, with an average temperature ranging between max 59.9°F (15.5°C) and min 44.1°F (6.7°C). Cortland's progression into October involves a drop in the average high-temperature, receding from an agreeable 73°F (22.8°C) in September to a refreshing 59.9°F (15.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Cortland, is also a frosty month, with an average temperature varying between 45.3°F (7.4°C) and 32°F (0°C). With the onset of November, Cortland's weather experiences a distinct temperature drop, moving from a moderate 59.9°F (15.5°C) in October to a chilly 45.3°F (7.4°C). Weather in November »
Weather in December
December, the first month of the winter in Cortland, is also a wintry month, with an average temperature ranging between max 33.1°F (0.6°C) and min 23°F (-5°C). December brings a decrease in the average high-temperature, shifting from a chilly 45.3°F (7.4°C) in November to a wintry 33.1°F (0.6°C). Weather in December »
[Resources]Frequently asked questions
What time of the year is the coldest in Cortland?
January is the coldest month, exhibiting average temperatures of 27°F (-2.8°C) at the peak and 15.1°F (-9.4°C) at the base.
What is the most humid month in Cortland?
January and July, with an average relative humidity of 85%, are most humid months.
How many days does it rain in Cortland?
In Cortland, Illinois, during the entire year, the rain falls for 152.6 days and collects up to 32.09" (815mm) of precipitation.
When does it snow in Cortland?
Months with snowfall are January through May, October through December.
What is the snowiest month in Cortland?
The month with the most snowfall in Cortland is January, when snow falls for 11.8 days and typically aggregates up to 5.55" (141mm) of snow.
How much does it snow in Cortland?
Throughout the year, in Cortland, there are 44.3 snowfall days, and 17.87" (454mm) of snow is accumulated.
What is the month with the least sunshine in Cortland?
January has the least sunshine of the year, with an average of 3.6h of sunshine.
When is the lowest UV index in Cortland?
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Cortland.
What is the driest month in Cortland?
The month with the least rainfall in Cortland is February, when the rain falls for 4.7 days and typically collects 1.65" (42mm) of precipitation.
When is Daylight Saving Time (DST) in Cortland?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Cortland, Illinois, 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 least humid month in Cortland?
April and October, with an average relative humidity of 75%, are the least humid months in Cortland, Illinois.
What is the wettest month in Cortland?
The month with the most rainfall is May, when the rain falls for 18.3 days and typically aggregates up to 4.37" (111mm) of precipitation.
When it does not snow in Cortland?
June through September are months without snowfall in Cortland, Illinois.
When are the longest days in Cortland?
With an average of 15h and 12min of daylight, June has the longest days of the year in Cortland, Illinois.
What is the month with the highest UV index in Cortland?
The months with the highest UV index are June and August, with an average maximum UV index of 6.
What are the warmest months in Cortland?
In Cortland, the average highest temperatures are observed in July, with a high of 80.2°F (26.8°C) and a low of 63.1°F (17.3°C).
What month has the most sunshine in Cortland?
With an average of 9.6h of sunshine, July has the most sunshine of the year in Cortland.
What is the month with the shortest days in Cortland?
December has the shortest days of the year in Cortland, Illinois, with an average of 9h and 12min of daylight.
Average temperature
Cortland, IL
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (27°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure
Cortland, 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:
30.1"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
Cortland, IL
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.7mph - Average wind speed in April:
10mph - Average wind speed in May:
8.5mph - Average wind speed in June:
7.4mph
- Average wind speed in July:
6.4mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.2mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.6mph - Average wind speed in December:
9.3mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity
Cortland, IL
The months with the highest relative humidity are January and July (85%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall
Cortland, IL
- Average rainfall in January:
1.81" - Average rainfall in February:
1.65" - Average rainfall in March:
2.05" - Average rainfall in April:
3.86" - Average rainfall in May:
4.37" - Average rainfall in June:
4.13"
- Average rainfall in July:
3.15" - Average rainfall in August:
2.72" - Average rainfall in September:
2.24" - Average rainfall in October:
2.68" - Average rainfall in November:
1.73" - Average rainfall in December:
1.69"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is February (1.65").
Average rainfall days
Cortland, IL
- Average rainfall days in January:
5.7 days - Average rainfall days in February:
4.7 days - Average rainfall days in March:
12.2 days - Average rainfall days in April:
16.4 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
18.1 days
- Average rainfall days in July:
18.1 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
12.2 days - Average rainfall days in October:
13.1 days - Average rainfall days in November:
9.5 days - Average rainfall days in December:
8.5 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (4.7 days).
Average snowfall
Cortland, IL
- Average snowfall in January:
5.55" - Average snowfall in February:
3.86" - Average snowfall in March:
2.17" - Average snowfall in April:
1.34" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (5.55").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Cortland, IL
- Average snowfall days in January:
11.8 days - Average snowfall days in February:
10.6 days - Average snowfall days in March:
5.6 days - Average snowfall days in April:
1.7 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:
0.8 days - Average snowfall days in November:
3.7 days - Average snowfall days in December:
10 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Cortland, IL
- Average daylight in January:
9h and 3min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
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 4min - Average sunshine in February:
3h and 5min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 2min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
9h and 4min - Average sunshine in August:
9h and 3min - Average sunshine in September:
8h and 3min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Cortland, IL
- Average sunshine days in January:
14.6 days - Average sunshine days in February:
13.4 days - Average sunshine days in March:
14.4 days - Average sunshine days in April:
10.8 days - Average sunshine days in May:
10.8 days - Average sunshine days in June:
10.3 days
- Average sunshine days in July:
10.3 days - Average sunshine days in August:
12.9 days - Average sunshine days in September:
15.7 days - Average sunshine days in October:
15.4 days - Average sunshine days in November:
17.2 days - Average sunshine days in December:
15.5 days
The month with the most sunshine days is November (17.2 days).
The months with the least sunshine days are June and July (10.3 days).
Average UV index
Cortland, IL
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Cortland, IL
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 35).
Average visibility
Cortland, IL
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Cortland, Illinois, USA
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