Hardly any U.S. towns see harsher January nights than Sumner Township
Midsummer highs settle at about 81°. In July, afternoons here are cooler than in 90% of U.S. towns. Decade by decade the climate has edged up, 1.2° above 1901–2000. Tender plants can go out after about April 30; in half of years the first frost comes by October 6.
A year in Sumner Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about Sumner Township’s climate
Compared with towns across the U.S., with Sumner Township’s place in Minnesota beside it.
What a year in Sumner Township feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 159 frost-free days a year
In half of years the last 32° night comes by April 30 and the first by October 6. Frost and day counts come from NOAA’s station at Rochester International Airport, 9 miles from the town’s center, at about the same height.
The 2023 USDA map puts Sumner Township’s center in zone 4b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −21°. 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 53 inches of snow a winter
Snow, measured at Rochester International Airport, falls mostly in January and December. Precipitation (rain plus melted snow) adds up to 36 inches a year; June is the wettest month and January the driest. Rain or snow falls on about 124 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Sumner Township
94% of the work is heating, so the furnace matters far more than the air conditioner. 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 Rochester International Airport.
Living with Sumner Township’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
159 frost-free days in zone 4b. The last frost comes by Apr 30 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 6.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 0.5 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Sumner Township from natural hazards, river flooding is the largest share (64%); heat waves, cold waves, winter storms and ice storms together are 16%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Sumner Township and its neighbors
Every town next door is within a degree of Sumner Township in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Sumner 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 |
|---|---|---|---|---|
| Sumner Township, MN | 6° | 81° | 36" | 53" |
| Peru, NY | 9° | 80° | 35" | 50" |
| Shawano, WI | 8° | 81° | 33" | 48" |
| Colchester, VT | 10° | 81° | 38" | 50" |
| Littleton, NH | 6° | 80° | 40" | 68" |
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 Sumner Township averaged 1.2° warmer than the 1900s. The biggest change is in December (+3.0°).
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 Sumner Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Sumner Township’s place among Minnesota’s.
Sumner Township weather by month
Highs, lows and precipitation from NOAA’s grid at Sumner Township’s center; snow, wet days and snow on the ground from Rochester International Airport. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 23° | 6° | 1.0" | 12.2" | 9 | 25 | 4° – 27° |
| February | 27° | 10° | 1.0" | 10.7" | 8 | 23 | 6° – 30° |
| March | 40° | 22° | 2.0" | 8.6" | 10 | 14 | 23° – 48° |
| April | 55° | 34° | 3.7" | 3.3" | 12 | 2 | 34° – 52° |
| May | 68° | 46° | 4.7" | 0.5" | 13 | 0 | 51° – 63° |
| June | 77° | 56° | 5.6" | 0.0" | 13 | 0 | 63° – 71° |
| July | 81° | 60° | 4.4" | 0.0" | 11 | 0 | 64° – 76° |
| August | 78° | 57° | 4.3" | 0.0" | 10 | 0 | 63° – 73° |
| September | 72° | 49° | 3.8" | 0.0" | 9 | 0 | 53° – 66° |
| October | 58° | 37° | 2.6" | 0.9" | 10 | 0 | 42° – 54° |
| November | 42° | 25° | 1.9" | 4.5" | 9 | 5 | 24° – 45° |
| December | 28° | 13° | 1.3" | 12.4" | 10 | 20 | 6° – 30° |
| Year | 54° | 35° | 36.2" | 53.1" | 124 | 89 |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 23° to 48°. June is the most reliable, staying within 8°.
Where Sumner 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 Sumner Township’s center.
- Snow: Rochester International Airport.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Rochester International Airport, 9 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 Sumner Township’s climate
What is the weather like in Sumner Township?
A typical July afternoon reaches 81°, a January night drops to 6°, and about 53 inches of snow falls in a normal winter. Colder January nights than 97% of U.S. towns; cooler July afternoons than 90% of U.S. towns.
How cold does it get in Sumner Township in winter?
January nights average 6°. About 156 nights a year reach 32° or below and 26 reach 0° or below. In the coldest January of the last 30 years the month averaged 4°.
How much snow does Sumner Township get?
About 53 inches in a normal winter at Rochester International Airport, most of it in January and December, with snow on the ground about 89 days a year.
How hot does it get in Sumner Township?
July, with a typical high of 81° and a low of 60°. About 5 days a year reach 90° (Rochester International Airport).
When is the first and last frost in Sumner Township?
In half of years the last spring frost (32°) comes by April 30 and the first fall frost by October 6, about 159 frost-free days, at Rochester International Airport.
What growing zone is Sumner Township in?
Zone 4b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −21°.
What is the best time of year to visit Sumner Township?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Sumner 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 Sumner 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.