Leland, IL climate
Leland has cold winters and pleasant summers. A typical July afternoon reaches 84°, a January night drops to 15°, and about 30 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Leland feels like
Winter
Spring
Summer
Fall
Leland weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 30° | 15° | 1.7" | 10.2" | 8 | 14° – 34° |
| February | 35° | 19° | 1.7" | 7.1" | 7 | 14° – 38° |
| March | 48° | 28° | 2.3" | 3.4" | 8 | 29° – 53° |
| April | 61° | 38° | 3.6" | 0.3" | 10 | 41° – 56° |
| May | 72° | 49° | 4.6" | 0 | 12 | 54° – 67° |
| June | 81° | 59° | 4.6" | 0 | 11 | 66° – 74° |
| July | 84° | 63° | 3.9" | 0 | 9 | 68° – 80° |
| August | 82° | 61° | 3.7" | 0 | 8 | 66° – 78° |
| September | 76° | 53° | 3.4" | 0 | 8 | 60° – 70° |
| October | 64° | 42° | 3.2" | 0 | 9 | 48° – 58° |
| November | 48° | 31° | 2.5" | 0.5" | 7 | 31° – 49° |
| December | 35° | 20° | 2.0" | 8.3" | 9 | 13° – 39° |
| Year | 60° | 40° | 37.1" | 29.8" | 108 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Leland
Leland gets 37 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 108 days a year.
About 171 frost-free days a year
In half of years the last 32° night comes by April 27 and the first one by October 15. That leaves about 171 frost-free days for gardens, shorter than 59% of U.S. towns.
Heating and cooling a home in Leland
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Leland, 91% of that work is heating and 9% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How Leland compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Leland averaged 1.1° warmer than the 1900s. The biggest change is in December (+2.4°). The shift is smaller than in 57% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Leland’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 13° to 39°. June is the most reliable, staying within 8°.
Common questions about Leland’s climate
What is the coldest month in Leland?
January, with a typical high of 30° and a low of 15°.
What is the hottest month in Leland?
July, with a typical high of 84° and a low of 63°. About 8 days a year reach 90°.
How much snow does Leland get?
About 30 inches in a normal winter, most of it in January.
When is the first frost in Leland?
In half of years the first 32° night comes by October 15, and the last spring frost by April 27.
What is the rainiest month in Leland?
May, with 4.6 inches of rain and melted snow. The year totals 37 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Leland itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Shabbona 3s, IL (9 mi, snow) and Paw Paw 2s, IL (10 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.