Climate and monthly weather forecastLeland, IL
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Leland, Illinois, with an average temperature fluctuating between 28.8°F (-1.8°C) and 16.7°F (-8.5°C). Leland's coldest month, January, generally records average temperatures ranging from a high of 28.8°F (-1.8°C) to a low of 16.7°F (-8.5°C). Weather in January »Weather in February
February, the last month of the winter in Leland, is a cold month, with temperature in the range of an average high of 32.7°F (0.4°C) and an average low of 19.8°F (-6.8°C). The transition into February notes an average high-temperature of a cold 32.7°F (0.4°C), revealing a mild distinction from the 28.8°F (-1.8°C) in January. Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Leland, Illinois, with an average temperature ranging between min 31.6°F (-0.2°C) and max 46°F (7.8°C). The start of March is characterized by an increase in the average high-temperature, transitioning from a cold 32.7°F (0.4°C) in February to a chilly 46°F (7.8°C). Weather in March »Weather in April
April is a mild spring month in Leland, Illinois, with an average temperature ranging between max 58.1°F (14.5°C) and min 41.5°F (5.3°C). With the onset of April, Leland experiences a temperature shift, with the average high-temperature moving from a chilly 46°F (7.8°C) in March to a moderate 58.1°F (14.5°C). Weather in April »Weather in May
May, the last month of the spring in Leland, is an agreeable month, with an average temperature ranging between min 52.9°F (11.6°C) and max 70.3°F (21.3°C). As May arrives, Leland's weather shows an increase in high-temperatures, moving from April's refreshing 58.1°F (14.5°C) to an agreeable 70.3°F (21.3°C). Weather in May »Weather in June
June, the first month of the summer in Leland, is a warm month, with an average temperature fluctuating between 61.3°F (16.3°C) and 78.6°F (25.9°C). The arrival of June introduces a minor uplift in high-temperatures, adjusting from an agreeable 70.3°F (21.3°C) in May to a moderately hot 78.6°F (25.9°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Leland, Illinois, with temperature in the range of an average low of 64°F (17.8°C) and an average high of 80.8°F (27.1°C). July is the warmest month of the year, registering average temperatures as high as 80.8°F (27.1°C) and as low as 64°F (17.8°C). July's average heat index is estimated at a hot 86°F (30°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Leland, Illinois, with an average temperature ranging between min 61.9°F (16.6°C) and max 79.3°F (26.3°C). The arrival of August brings an average high-temperature of a still warm 79.3°F (26.3°C), closely following the temperature pattern of July. Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Leland, Illinois, with an average temperature varying between 55.8°F (13.2°C) and 74.3°F (23.5°C). As Leland transitions from August to September, the average high-temperatures adjust to a still warm 74.3°F (23.5°C), nearly the same as the previous 79.3°F (26.3°C). Weather in September »Weather in October
October, like September, in Leland, Illinois, is another comfortable autumn month, with an average temperature varying between 45.3°F (7.4°C) and 61.3°F (16.3°C). October is characterized by a reduction in the average high-temperature, from a warm 74.3°F (23.5°C) in September to a refreshing 61.3°F (16.3°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in Leland, Illinois, with temperature in the range of an average high of 46.4°F (8°C) and an average low of 33.4°F (0.8°C). With the onset of November, Leland experiences a noticeable temperature shift, with the average high-temperature receding from an enjoyable 61.3°F (16.3°C) in October to a chilly 46.4°F (8°C). Weather in November »Weather in December
December, the first month of the winter in Leland, is also a wintry month, with temperature in the range of an average high of 34.5°F (1.4°C) and an average low of 24.3°F (-4.3°C). The onset of December introduces a moderate change in Leland's weather, with average high-temperatures falling from November's frosty 46.4°F (8°C) to a cold 34.5°F (1.4°C). Weather in December »Updated: Jul 27, 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
During the coldest month in Leland, January, temperatures average a high of 28.8°F (-1.8°C) and a low of 16.7°F (-8.5°C).
In Leland, during the entire year, the rain falls for 109.6 days and collects up to 10.31" (262mm) of precipitation.
January through April, October through December are months with snowfall.
January is the month with the most snowfall. Snow falls for 8.8 days and accumulates 1.38" (35mm) of snow.
Throughout the year, there are 28.6 snowfall days, and 4.33" (110mm) of snow is accumulated.
January has the least sunshine of the year, with an average of 3.8h of sunshine.
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
The month with the least rainfall is February, when the rain falls for 4.3 days and typically collects 0.47" (12mm) of precipitation.
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.
The month with the most rainfall is May, when the rain falls for 14.6 days and typically aggregates up to 1.54" (39mm) of precipitation.
May through September are months without snowfall.
The month with the longest days is June, with an average of 15h and 6min of daylight.
June has the most sunshine of the year, with an average of 9.7h of sunshine.
June and July, with an average maximum UV index of 6, are months with the highest UV index.
In Leland, July is identified by the average highest temperatures, reaching a peak of 80.8°F (27.1°C) and a low of 64°F (17.8°C).
The most humid month in Leland is July, with an average relative humidity of 85%.
With an average relative humidity of 73%, October is the least humid month.
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Leland, IL
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (28.8°F).
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure
Leland, IL
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"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:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Leland, IL
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.8mph - Average wind speed in April:
10.1mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.1mph - 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:
9.4mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity
Leland, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Leland, IL
- Average rainfall in January:
0.51" - Average rainfall in February:
0.47" - Average rainfall in March:
0.63" - Average rainfall in April:
1.26" - Average rainfall in May:
1.54" - Average rainfall in June:
1.22"
- Average rainfall in July:
1.18" - Average rainfall in August:
0.83" - Average rainfall in September:
0.75" - Average rainfall in October:
0.91" - Average rainfall in November:
0.51" - Average rainfall in December:
0.51"
The wettest month (with the highest rainfall) is May (1.54").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days
Leland, IL
- Average rainfall days in January:
3.8 days - Average rainfall days in February:
4.3 days - Average rainfall days in March:
9.1 days - Average rainfall days in April:
12.7 days - Average rainfall days in May:
14.6 days - Average rainfall days in June:
13.4 days
- Average rainfall days in July:
12 days - Average rainfall days in August:
10.5 days - Average rainfall days in September:
8.8 days - Average rainfall days in October:
8.9 days - Average rainfall days in November:
6.5 days - Average rainfall days in December:
5 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is January (3.8 days).
Average snowfall
Leland, IL
The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Leland, IL
- Average snowfall days in January:
8.8 days - Average snowfall days in February:
7 days - Average snowfall days in March:
3.8 days - Average snowfall days in April:
0.9 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:
0.3 days - Average snowfall days in November:
1.8 days - Average snowfall days in December:
5.9 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Leland, IL
- Average daylight in January:
9h and 36min - 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 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - 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 54min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 48min - Average sunshine in February:
4h and 0min - 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:
9h and 36min - Average sunshine in August:
9h and 36min - Average sunshine in September:
8h and 42min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 6min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Leland, IL
- Average sunshine days in January:
21.3 days - Average sunshine days in February:
18.8 days - Average sunshine days in March:
18.4 days - Average sunshine days in April:
15.8 days - Average sunshine days in May:
14.2 days - Average sunshine days in June:
14.3 days
- Average sunshine days in July:
14.9 days - Average sunshine days in August:
16.9 days - Average sunshine days in September:
19.9 days - Average sunshine days in October:
20.4 days - Average sunshine days in November:
20.9 days - Average sunshine days in December:
21.3 days
The months with the most sunshine days are January and December (21.3 days).
The month with the least sunshine days is May (14.2 days).
Average UV index
Leland, IL
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Leland, IL
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility
Leland, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
