John J. and Eva Reynier Porter Estate · Photo: rossograph · CC BY-SA 4.0South Arm Township gets about 122 inches of snow a winter, more than all but 134 U.S. towns
A typical July afternoon reaches 81°, a January night drops to 14°, and about 122 inches of snow falls in a normal winter.
A year in South Arm Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about South Arm Township’s climate
Compared with towns across the U.S., with South Arm Township’s place in Michigan beside it.
What a year in South Arm Township feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 144 frost-free days a year
In half of years the last 32° night comes by May 16 and the first by October 6. Frost and day counts come from NOAA’s station at E Jordan 2nw, MI, 1.8 miles from the town’s center, at about the same height.
The 2023 USDA map puts South Arm Township’s center in zone 5a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −15°. 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 122 inches of snow a winter
Snow, measured at E Jordan, MI, falls mostly in January and December. Precipitation (rain plus melted snow) adds up to 35 inches a year; October is the wettest month and February the driest. Rain or snow falls on about 149 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in South Arm Township
97% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at E Jordan 2nw, MI.
Living with South Arm Township’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
144 frost-free days in zone 5a. The last frost comes by May 16 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. 7.3 miles of trails are waiting.
Parks & trails →Cold waves are 46% of the yearly building losses FEMA expects in South Arm Township from natural hazards, the largest share. Normals are averages; the hazards page covers the extremes.
Natural hazards →South Arm Township and its neighbors
Wilson Township has the coldest January nights next door (13°, 1° colder). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like South Arm 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 |
|---|---|---|---|---|
| South Arm Township, MI | 14° | 81° | 35" | 122" |
| Arcadia, NY | 17° | 81° | 36" | 105" |
| Shelburne, VT | 11° | 82° | 38" | 88" |
| Beachwood, OH | 19° | 82° | 42" | 114" |
| Summit Park, UT | 19° | 79° | 30" | 153" |
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 South Arm Township averaged 1.8° warmer than the 1900s. The biggest change is in February (+3.2°).
A bigger shift than in 77% 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 South Arm Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with South Arm Township’s place among Michigan’s.
South Arm Township weather by month
Highs, lows and precipitation from NOAA’s grid at South Arm Township’s center; snow, wet days and snow on the ground from E Jordan, MI. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 28° | 14° | 2.4" | 37.4" | 17 | 29 | 10° – 30° |
| February | 30° | 13° | 1.6" | 23.1" | 12 | 28 | 7° – 32° |
| March | 40° | 20° | 1.8" | 11.0" | 10 | 21 | 20° – 44° |
| April | 53° | 31° | 2.9" | 4.6" | 11 | 3 | 33° – 49° |
| May | 67° | 42° | 3.1" | 0.0" | 12 | 0 | 46° – 60° |
| June | 76° | 52° | 3.2" | 0.0" | 10 | 0 | 60° – 70° |
| July | 81° | 57° | 2.9" | 0.0" | 10 | 0 | 62° – 73° |
| August | 79° | 56° | 3.2" | 0.0" | 10 | 0 | 62° – 72° |
| September | 71° | 49° | 3.8" | 0.0" | 11 | 0 | 54° – 65° |
| October | 57° | 39° | 4.3" | 0.7" | 15 | 0 | 43° – 55° |
| November | 44° | 30° | 3.0" | 10.0" | 15 | 7 | 30° – 44° |
| December | 33° | 21° | 2.6" | 35.4" | 16 | 21 | 19° – 36° |
| Year | 55° | 35° | 34.8" | 122.2" | 149 | 110 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 7° to 32°. August is the most reliable, staying within 9°.
Where South Arm 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 South Arm Township’s center.
- Snow: E Jordan, MI (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: E Jordan 2nw, MI, 1.8 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 South Arm Township’s climate
What is the weather like in South Arm Township?
A typical July afternoon reaches 81°, a January night drops to 14°, and about 122 inches of snow falls in a normal winter. Colder January nights than 87% of U.S. towns; cooler July afternoons than 90% of U.S. towns.
How cold does it get in South Arm Township in winter?
February nights average 13°. About 170 nights a year reach 32° or below and 14 reach 0° or below. In the coldest February of the last 30 years the month averaged 7°.
How much snow does South Arm Township get?
About 122 inches in a normal winter at E Jordan, MI, most of it in January and December, with snow on the ground about 110 days a year.
How hot does it get in South Arm Township?
July, with a typical high of 81° and a low of 57°. About 5 days a year reach 90° (E Jordan 2nw, MI).
When is the first and last frost in South Arm Township?
In half of years the last spring frost (32°) comes by May 16 and the first fall frost by October 6, about 144 frost-free days, at E Jordan 2nw, MI.
What growing zone is South Arm Township in?
Zone 5a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −15°.
What is the best time of year to visit South Arm 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 South Arm Township getting warmer?
Yes: 1991–2020 averaged 1.8° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 77% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in South Arm 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.