Hermantown gets about 90 inches of snow a winter, more than 97% of U.S. towns
A typical July afternoon reaches 77°, a January night drops to 2°, and about 90 inches of snow falls in a normal winter.
A year in Hermantown at a glance
Each month’s typical high and low, and what it brings.
What stands out about Hermantown’s climate
Compared with towns across the U.S., with Hermantown’s place in Minnesota beside it.
What a year in Hermantown feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 140 frost-free days a year
In half of years the last 32° night comes by May 13 and the first by October 1. Frost and day counts come from NOAA’s station at Duluth, MN, 3 miles from the town’s center, at about the same height.
The 2023 USDA map puts Hermantown’s center in zone 4b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −24°. 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 90 inches of snow a winter
Snow, measured at Duluth, MN, falls mostly in December. Precipitation (rain plus melted snow) adds up to 31 inches a year; June is the wettest month and February the driest. Rain or snow falls on about 133 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Hermantown
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 Duluth, MN.
Living with Hermantown’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
140 frost-free days in zone 4b. The last frost comes by May 13 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 1.
Months with highs of 62–84° and lows of 40° or more: June, July, August and September. 7.1 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Hermantown from natural hazards, river flooding is the largest share (81%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Hermantown and its neighbors
Canosia Township has the coldest January nights next door (0°, 2° 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 Hermantown’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 |
|---|---|---|---|---|
| Hermantown, MN | 2° | 77° | 31" | 90" |
| Rhinelander, WI | 3° | 78° | 33" | 82" |
| Kingsford, MI | 5° | 80° | 29" | 61" |
| Presque Isle, ME | 2° | 77° | 41" | 98" |
| Beekmantown, NY | 9° | 80° | 35" | 80" |
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 Hermantown averaged 1.9° warmer than the 1900s. The biggest change is in January (+3.8°).
A bigger shift than in 87% 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 Hermantown compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Hermantown’s place among Minnesota’s.
Hermantown weather by month
Highs, lows and precipitation from NOAA’s grid at Hermantown’s center; snow, wet days and snow on the ground from Duluth, MN. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 19° | 2° | 1.0" | 16.8" | 10 | 31 | −3° – 24° |
| February | 25° | 4° | 0.9" | 15.1" | 9 | 28 | 4° – 29° |
| March | 37° | 16° | 1.4" | 12.8" | 10 | 27 | 18° – 39° |
| April | 49° | 28° | 2.5" | 9.1" | 11 | 10 | 31° – 45° |
| May | 62° | 39° | 3.3" | 0.8" | 13 | 0 | 46° – 56° |
| June | 72° | 49° | 4.4" | 0.0" | 12 | 0 | 56° – 64° |
| July | 77° | 54° | 4.1" | 0.0" | 12 | 0 | 59° – 72° |
| August | 75° | 53° | 3.7" | 0.0" | 11 | 0 | 58° – 67° |
| September | 66° | 45° | 3.3" | 0.1" | 12 | 0 | 49° – 60° |
| October | 52° | 34° | 3.0" | 2.7" | 12 | 2 | 36° – 47° |
| November | 36° | 21° | 1.8" | 14.1" | 11 | 13 | 20° – 39° |
| December | 24° | 9° | 1.3" | 18.7" | 11 | 27 | 4° – 26° |
| Year | 50° | 29° | 30.6" | 90.2" | 133 | 137 |
How much a month can swing
A normal is an average. January swings the most: from 1991 to 2020 its average ranged from -3° to 24°. June is the most reliable, staying within 7°.
Where Hermantown’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 Hermantown’s center.
- Snow: Duluth, MN.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Duluth, MN, 3 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 Hermantown’s climate
What is the weather like in Hermantown?
A typical July afternoon reaches 77°, a January night drops to 2°, and about 90 inches of snow falls in a normal winter. Colder January nights than all but 72 U.S. towns; cooler July afternoons than 97% of U.S. towns.
How cold does it get in Hermantown in winter?
January nights average 2°. About 177 nights a year reach 32° or below and 38 reach 0° or below. In the coldest January of the last 30 years the month averaged −3°.
How much snow does Hermantown get?
About 90 inches in a normal winter at Duluth, MN, most of it in December, with snow on the ground about 137 days a year.
How hot does it get in Hermantown?
July, with a typical high of 77° and a low of 54°. About 2 days a year reach 90° (Duluth, MN).
When is the first and last frost in Hermantown?
In half of years the last spring frost (32°) comes by May 13 and the first fall frost by October 1, about 140 frost-free days, at Duluth, MN.
What growing zone is Hermantown in?
Zone 4b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −24°.
What is the best time of year to visit Hermantown?
By one simple rule (highs of 62–84° and lows of 40° or more), June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Hermantown getting warmer?
Yes: 1991–2020 averaged 1.9° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 87% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Hermantown.
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.