Fox Theatre · Photo: Chris Rand · CC BY-SA 3.0Summers in Allouez are cooler than in 93% of U.S. towns
January mornings start at about 11°. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 68° apart. Winter nights are cold: in January they are colder than in 92% of U.S. towns. Seedlings are safe outdoors from about April 30, with the first autumn frost due around October 9.
A year in Allouez at a glance
Each month’s typical high and low, and what it brings.
What stands out about Allouez’s climate
Compared with towns across the U.S., with Allouez’s place in Wisconsin beside it.
What a year in Allouez feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 161 frost-free days a year
In half of years the last 32° night comes by April 30 and the first by October 9. Frost and day counts come from NOAA’s station at Green Bay, WI, 5 miles from the town’s center, at about the same height.
The 2023 USDA map puts Allouez’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 56 inches of snow a winter
Snow, measured at Green Bay, WI, falls mostly in January and 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 126 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Allouez
94% 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 Green Bay, WI.
Living with Allouez’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
161 frost-free days in zone 5b. 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 9.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 5.9 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Allouez from natural hazards, river flooding is the largest share (71%); heat waves, cold waves, winter storms and ice storms together are 18%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Allouez and its neighbors
Every town next door is within a degree of Allouez in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Allouez’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 |
|---|---|---|---|---|
| Allouez, WI | 11° | 80° | 33" | 56" |
| Plattsburgh, NY | 9° | 80° | 34" | 50" |
| Houghton Lake, MI | 12° | 81° | 33" | 66" |
| Colchester, VT | 10° | 81° | 38" | 50" |
| Stewartville, MN | 6° | 81° | 36" | 53" |
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 Allouez averaged 2.0° warmer than the 1900s. The biggest change is in December (+3.7°).
A bigger shift than in 91% 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 Allouez compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Allouez’s place among Wisconsin’s.
Allouez weather by month
Highs, lows and precipitation from NOAA’s grid at Allouez’s center; snow, wet days and snow on the ground from Green Bay, WI. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 26° | 11° | 1.5" | 14.3" | 11 | 24 | 7° – 31° |
| February | 30° | 14° | 1.2" | 12.0" | 9 | 24 | 10° – 32° |
| March | 40° | 24° | 1.9" | 8.1" | 10 | 13 | 23° – 46° |
| April | 52° | 34° | 3.0" | 4.7" | 12 | 2 | 35° – 49° |
| May | 65° | 44° | 3.6" | 0.0" | 12 | 0 | 48° – 61° |
| June | 75° | 55° | 4.1" | 0.0" | 11 | 0 | 61° – 69° |
| July | 80° | 59° | 3.7" | 0.0" | 11 | 0 | 63° – 75° |
| August | 78° | 58° | 3.4" | 0.0" | 10 | 0 | 63° – 73° |
| September | 71° | 51° | 3.3" | 0.0" | 10 | 0 | 54° – 66° |
| October | 57° | 39° | 2.9" | 0.3" | 10 | 0 | 44° – 55° |
| November | 44° | 29° | 2.1" | 3.1" | 10 | 3 | 27° – 44° |
| December | 32° | 18° | 1.8" | 13.1" | 11 | 17 | 12° – 35° |
| Year | 54° | 36° | 32.5" | 55.6" | 126 | 82 |
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 31°. June is the most reliable, staying within 9°.
Where Allouez’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 Allouez’s center.
- Snow: Green Bay, WI.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Green Bay, WI, 5 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 Allouez’s climate
What is the weather like in Allouez?
A typical July afternoon reaches 80°, a January night drops to 11°, and about 56 inches of snow falls in a normal winter. Colder January nights than 92% of U.S. towns; cooler July afternoons than 93% of U.S. towns.
How cold does it get in Allouez in winter?
January nights average 11°. About 152 nights a year reach 32° or below and 19 reach 0° or below. In the coldest January of the last 30 years the month averaged 7°.
How much snow does Allouez get?
About 56 inches in a normal winter at Green Bay, WI, most of it in January and December, with snow on the ground about 82 days a year.
How hot does it get in Allouez?
July, with a typical high of 80° and a low of 59°. About 6 days a year reach 90° (Green Bay, WI).
When is the first and last frost in Allouez?
In half of years the last spring frost (32°) comes by April 30 and the first fall frost by October 9, about 161 frost-free days, at Green Bay, WI.
What growing zone is Allouez 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 Allouez?
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 Allouez getting warmer?
Yes: 1991–2020 averaged 2.0° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 91% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Allouez.
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.