Brenton Township has colder winter nights than 76% of U.S. towns
On a normal July day the thermometer tops out near 85°. Expect the heaviest rain or snow in June and the lightest in February. Precipitation is light here, less than falls on 63% of U.S. towns. Seedlings are safe outdoors from about April 25, with the first autumn frost due around October 20.
A year in Brenton Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about Brenton Township’s climate
Compared with towns across the U.S., with Brenton Township’s place in Illinois beside it.
What a year in Brenton Township feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 175 frost-free days a year
In half of years the last 32° night comes by April 25 and the first by October 20. Frost and day counts come from NOAA’s station at Piper City, IL, 2.8 miles from the town’s center, at about the same height.
The 2023 USDA map puts Brenton Township’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −10°. 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 28 inches of snow a winter
Snow, measured at Chatsworth, IL, is heaviest from January through February, about 8 inches a month. Precipitation (rain plus melted snow) adds up to 39 inches a year; June is the wettest month and February the driest. Rain or snow falls on about 91 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Brenton Township
85% of the work is heating. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Piper City, IL.
Living with Brenton Township’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
175 frost-free days in zone 6a. The last frost comes by Apr 25 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: May, June, August, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Brenton Township from natural hazards, river flooding is the largest share (66%); heat waves, cold waves, winter storms and ice storms together are 15%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Brenton Township and its neighbors
Every town next door is within a degree of Brenton Township in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Brenton 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 |
|---|---|---|---|---|
| Brenton Township, IL | 17° | 85° | 39" | 28" |
| Decatur, IN | 19° | 84° | 40" | 28" |
| Claverack, NY | 16° | 84° | 42" | 31" |
| Mount Pleasant, IA | 15° | 85° | 38" | 25" |
| Bryan, OH | 18° | 84° | 37" | 29" |
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 Brenton Township averaged 1.2° warmer than the 1900s. The biggest change is in December (+2.5°).
A smaller shift than in 59% 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 Brenton Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Brenton Township’s place among Illinois’.
Brenton Township weather by month
Highs, lows and precipitation from NOAA’s grid at Brenton Township’s center; snow, wet days and snow on the ground from Chatsworth, IL. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 33° | 17° | 2.1" | 8.4" | 7 | 13 | 17° – 38° |
| February | 38° | 21° | 1.9" | 7.7" | 7 | 9 | 17° – 40° |
| March | 50° | 30° | 2.6" | 3.5" | 8 | 3 | 32° – 55° |
| April | 63° | 39° | 3.8" | 0.6" | 9 | 0 | 43° – 57° |
| May | 74° | 51° | 4.5" | 0.0" | 11 | 0 | 56° – 70° |
| June | 83° | 60° | 4.7" | 0.0" | 9 | 0 | 67° – 75° |
| July | 85° | 63° | 4.4" | 0.0" | 7 | 0 | 69° – 81° |
| August | 83° | 61° | 3.7" | 0.0" | 7 | 0 | 67° – 78° |
| September | 78° | 54° | 3.4" | 0.0" | 6 | 0 | 61° – 71° |
| October | 66° | 42° | 3.3" | 0.0" | 8 | 0 | 50° – 59° |
| November | 50° | 32° | 2.8" | 1.1" | 7 | 1 | 33° – 49° |
| December | 38° | 22° | 2.2" | 6.3" | 7 | 7 | 16° – 41° |
| Year | 62° | 41° | 39.4" | 27.6" | 91 | 31 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 16° to 41°. June is the most reliable, staying within 9°.
Where Brenton 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 Brenton Township’s center.
- Snow: Chatsworth, IL.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Piper City, IL, 2.8 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 Brenton Township’s climate
What is the weather like in Brenton Township?
A typical July afternoon reaches 85°, a January night drops to 17°, and about 28 inches of snow falls in a normal winter. Colder January nights than 76% of U.S. towns; cooler July afternoons than 53% of U.S. towns.
How cold does it get in Brenton Township in winter?
January nights average 17°. About 134 nights a year reach 32° or below and 8 reach 0° or below. In the coldest January of the last 30 years the month averaged 17°.
How much snow does Brenton Township get?
About 28 inches in a normal winter at Chatsworth, IL, heaviest from January through February, about 8 inches a month, with snow on the ground about 31 days a year.
How hot does it get in Brenton Township?
July, with a typical high of 85° and a low of 63°. About 28 days a year reach 90° and 1 reach 100° (Piper City, IL).
When is the first and last frost in Brenton Township?
In half of years the last spring frost (32°) comes by April 25 and the first fall frost by October 20, about 175 frost-free days, at Piper City, IL.
What growing zone is Brenton Township in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −10°.
What is the best time of year to visit Brenton Township?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Brenton Township getting warmer?
Yes: 1991–2020 averaged 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 59% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Brenton 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.