The climate in Mendon Township sits close to the middle of U.S. towns
The coldest hours of a January night bottom out at 19° on average. Its July heat outdoes that of 66% of U.S. towns. Compared with 1901–2000, the average now sits 0.6° higher. Warm coats and heating bills mark the months from November to March, when means dip under 50°.
A year in Mendon Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about Mendon Township’s climate
Compared with towns across the U.S., with Mendon Township’s place in Missouri beside it.
What a year in Mendon Township feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 201 frost-free days a year
In half of years the last 32° night comes by April 10 and the first by October 29. Frost and day counts come from NOAA’s station at Brunswick, MO, 10 miles from the town’s center, at about the same height.
The 2023 USDA map puts Mendon Township’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −6°. 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 14 inches of snow a winter
Snow, measured at Sumner 3 Sw, MO, falls mostly in January and December. Precipitation (rain plus melted snow) adds up to 40 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 86 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Mendon Township
80% of the work is heating. Months averaging under 55° run from November 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 Brunswick, MO.
Living with Mendon Township’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
201 frost-free days in zone 6a. The last frost comes by Apr 10 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 29.
Months with highs of 62–84° and lows of 40° or more: April, May, June, September and October. 27 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Mendon Township from natural hazards, river flooding is the largest share (55%); heat waves, cold waves, winter storms and ice storms together are 15%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Mendon Township and its neighbors
Every town next door is within a degree of Mendon Township in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Mendon 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 |
|---|---|---|---|---|
| Mendon Township, MO | 19° | 88° | 40" | 14" |
| Jerseyville, IL | 21° | 87° | 41" | 13" |
| Terre Haute, IN | 21° | 87° | 43" | 15" |
| Hamilton, OH | 22° | 87° | 43" | 9.7" |
| Strasburg, VA | 23° | 87° | 39" | 21" |
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 Mendon Township averaged 0.6° warmer than the 1900s. The biggest change is in December (+1.8°).
A smaller shift than in 96% 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 Mendon Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Mendon Township’s place among Missouri’s.
Mendon Township weather by month
Highs, lows and precipitation from NOAA’s grid at Mendon Township’s center; snow, wet days and snow on the ground from Sumner 3 Sw, MO. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 37° | 19° | 1.4" | 4.4" | 5 | 21° – 38° |
| February | 42° | 23° | 1.8" | 3.2" | 6 | 21° – 43° |
| March | 54° | 33° | 2.7" | 1.4" | 7 | 36° – 57° |
| April | 65° | 43° | 4.1" | 0.2" | 9 | 46° – 60° |
| May | 75° | 53° | 5.2" | 0.0" | 10 | 59° – 73° |
| June | 84° | 63° | 5.2" | 0.0" | 9 | 70° – 78° |
| July | 88° | 67° | 4.7" | 0.0" | 7 | 73° – 84° |
| August | 86° | 65° | 4.0" | 0.0" | 7 | 69° – 81° |
| September | 79° | 56° | 4.0" | 0.0" | 7 | 62° – 74° |
| October | 67° | 44° | 3.3" | 0.0" | 8 | 49° – 62° |
| November | 53° | 33° | 2.4" | 0.4" | 5 | 35° – 51° |
| December | 41° | 24° | 1.7" | 4.1" | 6 | 18° – 40° |
| Year | 64° | 44° | 40.3" | 13.7" | 86 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 18° to 40°. June is the most reliable, staying within 8°.
Where Mendon 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 Mendon Township’s center.
- Snow: Sumner 3 Sw, MO.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Brunswick, MO, 10 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 Mendon Township’s climate
What is the weather like in Mendon Township?
A typical July afternoon reaches 88°, a January night drops to 19°, and about 14 inches of snow falls in a normal winter. Colder January nights than 65% of U.S. towns; hotter July afternoons than 66% of U.S. towns.
How cold does it get in Mendon Township in winter?
January nights average 19°. About 118 nights a year reach 32° or below and 6 reach 0° or below. In the coldest January of the last 30 years the month averaged 21°.
How much snow does Mendon Township get?
About 14 inches in a normal winter at Sumner 3 Sw, MO, most of it in January and December.
How hot does it get in Mendon Township?
July, with a typical high of 88° and a low of 67°. About 26 days a year reach 90° (Brunswick, MO).
When is the first and last frost in Mendon Township?
In half of years the last spring frost (32°) comes by April 10 and the first fall frost by October 29, about 201 frost-free days, at Brunswick, MO.
What growing zone is Mendon Township in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −6°.
What is the best time of year to visit Mendon Township?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Mendon Township getting warmer?
Yes: 1991–2020 averaged 0.6° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 96% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Mendon 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.