Smithville, IL climate
Smithville has chilly winters and warm summers. A typical July afternoon reaches 86°, a January night drops to 17°, and about 26 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Smithville feels like
Winter
Spring
Summer
Fall
Smithville 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 | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 33° | 17° | 2.0" | 7.7" | 10 | 14 | 17° – 37° |
| February | 38° | 21° | 1.9" | 6.9" | 9 | 9 | 18° – 41° |
| March | 51° | 31° | 2.5" | 3.3" | 11 | 3 | 34° – 55° |
| April | 64° | 41° | 3.9" | 0.5" | 12 | 0 | 45° – 59° |
| May | 74° | 52° | 4.9" | 0 | 13 | 0 | 57° – 72° |
| June | 83° | 61° | 4.4" | 0 | 11 | 0 | 68° – 76° |
| July | 86° | 65° | 4.0" | 0 | 9 | 0 | 70° – 82° |
| August | 84° | 63° | 3.6" | 0 | 8 | 0 | 67° – 79° |
| September | 78° | 55° | 3.6" | 0 | 8 | 0 | 61° – 72° |
| October | 65° | 43° | 3.2" | 0.1" | 10 | 0 | 49° – 60° |
| November | 50° | 32° | 2.7" | 1.5" | 9 | 1 | 34° – 50° |
| December | 38° | 22° | 2.1" | 6.2" | 10 | 8 | 16° – 41° |
| Year | 62° | 42° | 38.8" | 26.2" | 117 | 36 |
“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 Smithville
Smithville gets 39 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 117 days a year. Snow covers the ground about 36 days of the year.
About 189 frost-free days a year
In half of years the last 32° night comes by April 16 and the first one by October 23. That leaves about 189 frost-free days for gardens, longer than 63% of U.S. towns.
Heating and cooling a home in Smithville
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Smithville, 83% of that work is heating and 17% 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 Smithville 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 Smithville averaged 1.2° warmer than the 1900s. The biggest change is in December (+2.4°). The shift is smaller than in 53% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Smithville’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 16° to 41°. June is the most reliable, staying within 8°.
Common questions about Smithville’s climate
What is the coldest month in Smithville?
January, with a typical high of 33° and a low of 17°.
What is the hottest month in Smithville?
July, with a typical high of 86° and a low of 65°. About 23 days a year reach 90°.
How much snow does Smithville get?
About 26 inches in a normal winter, most of it in January.
When is the first frost in Smithville?
In half of years the first 32° night comes by October 23, and the last spring frost by April 16.
What is the rainiest month in Smithville?
May, with 4.9 inches of rain and melted snow. The year totals 39 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Smithville itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Peoria Gtr Peoria Airport, IL (6 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.