Jackson, WI climate
Jackson has cold, snowy winters and pleasant summers. A typical July afternoon reaches 81°, a January night drops to 12°, and about 54 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Jackson feels like
Winter
Spring
Summer
Fall
Jackson weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 28° | 12° | 1.5" | 16.5" | 10 | 23 | 9° – 32° |
| February | 32° | 15° | 1.4" | 16.0" | 8 | 19 | 12° – 34° |
| March | 42° | 24° | 1.9" | 6.5" | 9 | 9 | 25° – 47° |
| April | 55° | 34° | 3.6" | 2.0" | 11 | 1 | 35° – 50° |
| May | 67° | 45° | 3.7" | 0.3" | 13 | 0 | 50° – 61° |
| June | 77° | 55° | 4.4" | 0 | 12 | 0 | 62° – 71° |
| July | 81° | 60° | 3.6" | 0 | 11 | 0 | 66° – 78° |
| August | 79° | 59° | 3.7" | 0 | 11 | 0 | 64° – 75° |
| September | 72° | 51° | 3.1" | 0 | 10 | 0 | 55° – 66° |
| October | 59° | 39° | 2.7" | 0.3" | 12 | 0 | 45° – 56° |
| November | 45° | 29° | 2.1" | 2.4" | 10 | 3 | 28° – 45° |
| December | 33° | 19° | 1.8" | 10.3" | 9 | 15 | 13° – 36° |
| Year | 56° | 37° | 33.6" | 54.3" | 125 | 70 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Jackson
Jackson gets 34 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 125 days a year. Snow covers the ground about 70 days of the year.
About 167 frost-free days a year
In half of years the last 32° night comes by April 30 and the first one by October 15. That leaves about 167 frost-free days for gardens, shorter than 64% of U.S. towns.
Heating and cooling a home in Jackson
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Jackson, 93% of that work is heating and 7% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Jackson and its neighbors
Jackson borders 6 towns with climate data. January nights across them vary by 1.9°. Polk has the coldest January nights (11°) and Jackson the hottest July afternoons (82°). Jackson’s January low is 12° and its July high 81°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Jackson compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Jackson averaged 1.3° warmer than the 1900s. The biggest change is in December (+3.1°). The shift is larger than in 59% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Jackson’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 13° to 36°. June is the most reliable, staying within 9°.
Common questions about Jackson’s climate
What is the coldest month in Jackson?
January, with a typical high of 28° and a low of 12°.
What is the hottest month in Jackson?
July, with a typical high of 81° and a low of 60°. About 10 days a year reach 90°.
How much snow does Jackson get?
About 54 inches in a normal winter, most of it in January.
When is the first frost in Jackson?
In half of years the first 32° night comes by October 15, and the last spring frost by April 30.
What is the rainiest month in Jackson?
June, with 4.4 inches of rain and melted snow. The year totals 34 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Jackson itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Germantown, WI (6 mi, snow) and Jackson, WI (3 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.