July in Humboldt stays fresher than in 94% of U.S. towns
The depth of winter brings overnight lows near 11°. Only 69° separates winter nights from summer afternoons. In January, nights here are colder than in 93% of U.S. towns. Garden planting can start around May 6; autumn frost returns near October 12.
A year in Humboldt at a glance
Each month’s typical high and low, and what it brings.
What stands out about Humboldt’s climate
Compared with towns across the U.S., with Humboldt’s place in Wisconsin beside it.
What a year in Humboldt feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 158 frost-free days a year
In half of years the last 32° night comes by May 6 and the first by October 12. Frost and day counts come from NOAA’s station at Denmark Wwtp, WI, 10 miles from the town’s center, at about the same height.
The 2023 USDA map puts Humboldt’s center in zone 5b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −14°. 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 Denmark Wwtp, WI, falls mostly in December. Precipitation (rain plus melted snow) adds up to 33 inches a year; June is the wettest month and February the driest. Rain or snow falls on about 125 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Humboldt
95% 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 Denmark Wwtp, WI.
Living with Humboldt’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
158 frost-free days in zone 5b. The last frost comes by May 6 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 12.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September.
Parks & trails →Of the yearly building losses FEMA expects in Humboldt from natural hazards, river flooding is the largest share (51%); heat waves, cold waves, winter storms and ice storms together are 31%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Humboldt and its neighbors
Every town next door is within a degree of Humboldt in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Humboldt’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 |
|---|---|---|---|---|
| Humboldt, WI | 11° | 79° | 33" | 53" |
| Plattsburgh, NY | 9° | 80° | 34" | 50" |
| Houghton Lake, MI | 12° | 81° | 33" | 66" |
| Stewartville, MN | 6° | 81° | 36" | 53" |
| Colchester, VT | 10° | 81° | 38" | 50" |
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 Humboldt averaged 1.9° warmer than the 1900s. The biggest change is in December (+3.4°).
A bigger shift than in 84% 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 Humboldt compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Humboldt’s place among Wisconsin’s.
Humboldt weather by month
Highs, lows and precipitation from NOAA’s grid at Humboldt’s center; snow, wet days and snow on the ground from Denmark Wwtp, WI. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 25° | 11° | 1.6" | 12.1" | 10 | 26 | 7° – 30° |
| February | 29° | 13° | 1.2" | 12.3" | 9 | 24 | 10° – 31° |
| March | 40° | 22° | 1.9" | 6.5" | 8 | 15 | 22° – 44° |
| April | 52° | 33° | 3.1" | 4.3" | 11 | 3 | 34° – 48° |
| May | 65° | 43° | 3.6" | 0.0" | 11 | 0 | 48° – 60° |
| June | 75° | 54° | 4.0" | 0.0" | 12 | 0 | 60° – 69° |
| July | 79° | 59° | 3.6" | 0.0" | 11 | 0 | 63° – 74° |
| August | 77° | 57° | 3.4" | 0.0" | 10 | 0 | 62° – 72° |
| September | 70° | 49° | 3.2" | 0.0" | 11 | 0 | 54° – 64° |
| October | 57° | 39° | 3.1" | 0.5" | 12 | 0 | 43° – 54° |
| November | 43° | 28° | 2.2" | 1.5" | 9 | 2 | 27° – 43° |
| December | 31° | 17° | 1.8" | 15.3" | 11 | 18 | 12° – 34° |
| Year | 54° | 35° | 32.6" | 52.5" | 125 | 87 |
How much a month can swing
A normal is an average. January swings the most: from 1991 to 2020 its average ranged from 7° to 30°. June is the most reliable, staying within 9°.
Where Humboldt’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 Humboldt’s center.
- Snow: Denmark Wwtp, WI.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Denmark Wwtp, WI, 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 Humboldt’s climate
What is the weather like in Humboldt?
A typical July afternoon reaches 79°, a January night drops to 11°, and about 53 inches of snow falls in a normal winter. Colder January nights than 93% of U.S. towns; cooler July afternoons than 94% of U.S. towns.
How cold does it get in Humboldt in winter?
January nights average 11°. About 156 nights a year reach 32° or below and 21 reach 0° or below. In the coldest January of the last 30 years the month averaged 7°.
How much snow does Humboldt get?
About 53 inches in a normal winter at Denmark Wwtp, WI, most of it in December, with snow on the ground about 87 days a year.
How hot does it get in Humboldt?
July, with a typical high of 79° and a low of 59°. About 4 days a year reach 90° (Denmark Wwtp, WI).
When is the first and last frost in Humboldt?
In half of years the last spring frost (32°) comes by May 6 and the first fall frost by October 12, about 158 frost-free days, at Denmark Wwtp, WI.
What growing zone is Humboldt in?
Zone 5b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −14°.
What is the best time of year to visit Humboldt?
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 Humboldt getting warmer?
Yes: 1991–2020 averaged 1.9° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 84% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Humboldt.
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.