In Mascoutah Township, July heat, January chill and rainfall all sit near the middle of U.S. towns
January nights here settle around 23°. Summer afternoons here are warmer than in 70% of U.S. towns. The latest 30-year average runs 1.2° warmer than 1901–2000’s, with February up the most. Plan time outside for April, May, September and October, when highs sit at 68–81°.
A year in Mascoutah Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about Mascoutah Township’s climate
Compared with towns across the U.S., with Mascoutah Township’s place in Illinois beside it.
What a year in Mascoutah Township feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 189 frost-free days a year
In half of years the last 32° night comes by April 12 and the first by October 20. Frost and day counts come from NOAA’s station at Belleville Siu Rsch, IL, 4 miles from the town’s center, at about the same height.
The 2023 USDA map puts Mascoutah Township’s center in zone 6b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 0°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 10 inches of snow a winter
Snow, measured at Albers 1 W, IL, falls mostly in January. Precipitation (rain plus melted snow) adds up to 43 inches a year; May is the wettest month and February the driest. Rain or snow falls on about 94 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Mascoutah Township
73% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Belleville Siu Rsch, IL.
Living with Mascoutah Township’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
189 frost-free days in zone 6b. The last frost comes by Apr 12 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 20.
Months with highs of 62–84° and lows of 40° or more: April, May, September and October. 1.9 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Mascoutah Township from natural hazards, river flooding is the largest share (35%); heat waves, cold waves, winter storms and ice storms together are 20%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Mascoutah Township and its neighbors
Every town next door is within a degree of Mascoutah Township in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Mascoutah Township’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Mascoutah Township, IL | 23° | 89° | 43" | 10" |
| Lake of the Woods, VA | 25° | 88° | 44" | 11" |
| Clinton, MO | 22° | 89° | 42" | 11" |
| Fort Scott, KS | 24° | 90° | 43" | 8.4" |
| Hurricane, WV | 25° | 87° | 44" | 11" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Mascoutah Township averaged 1.2° warmer than the 1900s. The biggest change is in February (+2.1°).
A smaller shift than in 60% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Mascoutah Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Mascoutah Township’s place among Illinois’.
Mascoutah Township weather by month
Highs, lows and precipitation from NOAA’s grid at Mascoutah Township’s center; snow, wet days and snow on the ground from Albers 1 W, IL. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 40° | 23° | 2.7" | 4.0" | 7 | 5 | 26° – 43° |
| February | 45° | 27° | 2.3" | 3.2" | 7 | 3 | 26° – 46° |
| March | 56° | 35° | 3.5" | 0.8" | 8 | 1 | 39° – 58° |
| April | 68° | 45° | 4.9" | 0.0" | 10 | 0 | 49° – 62° |
| May | 77° | 56° | 5.0" | 0.0" | 11 | 0 | 61° – 74° |
| June | 86° | 65° | 4.4" | 0.0" | 9 | 0 | 70° – 79° |
| July | 89° | 68° | 3.9" | 0.0" | 8 | 0 | 73° – 85° |
| August | 88° | 66° | 3.4" | 0.0" | 6 | 0 | 72° – 82° |
| September | 81° | 58° | 3.3" | 0.0" | 6 | 0 | 64° – 75° |
| October | 70° | 47° | 3.1" | 0.0" | 7 | 0 | 53° – 63° |
| November | 55° | 36° | 3.5" | 0.3" | 8 | 0 | 38° – 52° |
| December | 44° | 27° | 2.7" | 1.8" | 8 | 3 | 22° – 44° |
| Year | 66° | 46° | 42.5" | 10.1" | 94 | 12 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 22° to 44°. June is the most reliable, staying within 9°.
Where Mascoutah Township’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Mascoutah Township’s center.
- Snow: Albers 1 W, IL.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Belleville Siu Rsch, IL, 4 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Mascoutah Township’s climate
What is the weather like in Mascoutah Township?
A typical July afternoon reaches 89°, a January night drops to 23°, and about 10 inches of snow falls in a normal winter. Milder January nights than 56% of U.S. towns; hotter July afternoons than 70% of U.S. towns.
How cold does it get in Mascoutah Township in winter?
January nights average 23°. About 93 nights a year reach 32° or below and 2 reach 0° or below. In the coldest January of the last 30 years the month averaged 26°.
How much snow does Mascoutah Township get?
About 10 inches in a normal winter at Albers 1 W, IL, most of it in January, with snow on the ground about 12 days a year.
How hot does it get in Mascoutah Township?
July, with a typical high of 89° and a low of 68°. About 53 days a year reach 90° and 2 reach 100° (Belleville Siu Rsch, IL).
When is the first and last frost in Mascoutah Township?
In half of years the last spring frost (32°) comes by April 12 and the first fall frost by October 20, about 189 frost-free days, at Belleville Siu Rsch, IL.
What growing zone is Mascoutah Township in?
Zone 6b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 0°.
What is the best time of year to visit Mascoutah Township?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Mascoutah Township getting warmer?
Yes: 1991–2020 averaged 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 60% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Mascoutah Township.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.