Jackson, Wisconsin climate: Normal weather by month, frost dates and records
Jackson's normal year runs from 13°F January nights to 82°F July afternoons, with 32.6 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.2°C, January lows of −11°C, July highs of 28°C, 828 mm of precipitation a year.
- NOAA stationJackson
- Station IDUSC00473930
- Location43.32°N 88.17°W
- Elevation903 ft (275 m)
- From the centerunder 1 mile
- Population8,169
On October 22, the normal high in Jackson is 58°F and the normal low 38°F, and the chance of measurable rain or snow is 40%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Jackson.
- Jan 28° 13°
- Feb 32° 15°
- Mar 42° 25°
- Apr 54° 35°
- May 67° 46°
- Jun 77° 55°
- Jul 82° 60°
- Aug 80° 59°
- Sep 73° 52°
- Oct 61° 40°
- Nov 46° 29°
- Dec 34° 19°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Jackson each month?
July is the warmest month, with normal highs of 82°F; January the coldest, with normal lows of 13°F. The most precipitation falls in June (4.00 in), the least in January (1.36 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 28°F | 13°F | 20.2°F | 1.36 | 7 | <1 | 30 | 9 h 20 min |
| February | 32°F | 15°F | 23.4°F | 1.60 | 9 | <1 | 26 | 10 h 30 min |
| March | 42°F | 25°F | 33.2°F | 1.78 | 9 | <1 | 25 | 11 h 50 min |
| April | 54°F | 35°F | 44.6°F | 3.54 | 12 | <1 | 12 | 13 h 20 min |
| May | 67°F | 46°F | 56.3°F | 3.35 | 13 | <1 | 1 | 14 h 40 min |
| June | 77°F | 55°F | 66.3°F | 4.00 | 12 | 2 | <1 | 15 h 20 min |
| July | 82°F | 60°F | 71.1°F | 3.99 | 9 | 5 | <1 | 15 h 10 min |
| August | 80°F | 59°F | 69.5°F | 3.31 | 11 | 2 | <1 | 14 h |
| September | 73°F | 52°F | 62.2°F | 2.95 | 12 | 1 | <1 | 12 h 30 min |
| October | 61°F | 40°F | 50.3°F | 2.79 | 13 | <1 | 7 | 11 h 10 min |
| November | 46°F | 29°F | 37.1°F | 1.99 | 9 | <1 | 19 | 9 h 40 min |
| December | 34°F | 19°F | 26.3°F | 1.93 | 9 | <1 | 27 | 9 h |
| Year (annual) | 56°F | 37°F | 46.7°F | 32.59 | 125 | 10 | 146 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −2°C | −11°C | −6.6°C | 35 mm |
| February | 0°C | −9°C | −4.8°C | 41 mm |
| March | 6°C | −4°C | 0.7°C | 45 mm |
| April | 12°C | 2°C | 7.0°C | 90 mm |
| May | 19°C | 8°C | 13.5°C | 85 mm |
| June | 25°C | 13°C | 19.1°C | 102 mm |
| July | 28°C | 16°C | 21.7°C | 101 mm |
| August | 27°C | 15°C | 20.8°C | 84 mm |
| September | 23°C | 11°C | 16.8°C | 75 mm |
| October | 16°C | 5°C | 10.2°C | 71 mm |
| November | 8°C | −2°C | 2.8°C | 51 mm |
| December | 1°C | −7°C | −3.2°C | 49 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Germantown (6 miles away), gets 54 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00473930; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Jackson?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, July has the fewest days with rain (9).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00473930.
When is the last frost in Jackson?
In Jackson, the last spring frost (32°F) comes after April 30 in half of years and after May 15 in one year in ten; the first autumn frost comes before October 15 in half of years and before October 1 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 301 year in 10 after May 15; 9 in 10 after April 15
- First autumn frost, half of years before
- October 151 year in 10 before October 1; 9 in 10 before October 29
NOAA puts the median frost-free season at 167 days, and the season without a hard freeze (28°F) at 191 days.
A hard freeze (28°F) comes after April 17 in half of springs and before October 27 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Jackson in zone 5b in ZIP code 53037. By the map's own method, the average of each year's coldest night over 1991-2020, Jackson's NOAA station is in zone 5b: the coldest night of a typical year reaches −11°F (19 complete years).
Frost dates for every NOAA station in Wisconsin · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00473930; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Jackson?
In a normal year in Jackson, 10 days a year reach 90°F, 146 nights fall to 32°F or colder and 125 days bring measurable precipitation.
- Days at 90°F or more
- 10a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 146a normal year
- Days that stay below freezing
- 63high of 32°F or less
- Days with 0.01 inch of precipitation
- 125a normal year
The highest temperature in this station's record (since 2001) is 103°F, on July 7, 2012; the lowest is −23°F, on January 31, 2019.
The wettest calendar year on that record is 2008, with 41.16 in; the snowiest season is 2008–09, with 77.7 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00473930; records: ACIS (NOAA Regional Climate Centers), station USC00473930. Records use complete months only; a month missing more than three days is left out.
How sunny is Jackson?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Jackson, 3.8 kWh per square metre a day. July is the sunniest month (80%) and December the cloudiest (59%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 63% | 1.6 |
| February | 70% | 2.7 |
| March | 70% | 3.7 |
| April | 68% | 4.6 |
| May | 71% | 5.5 |
| June | 76% | 6.1 |
| July | 80% | 6.3 |
| August | 78% | 5.3 |
| September | 77% | 4.2 |
| October | 68% | 2.7 |
| November | 66% | 1.8 |
| December | 59% | 1.3 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Jackson need?
A normal year in Jackson brings 7,178 heating degree days, 34% more than the median U.S. place (5,373), and 558 cooling degree days, 39% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,545 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,387 | 0 |
| February | 1,165 | 0 |
| March | 985 | 1 |
| April | 611 | 1 |
| May | 293 | 23 |
| June | 66 | 105 |
| July | 14 | 204 |
| August | 20 | 158 |
| September | 143 | 61 |
| October | 461 | 5 |
| November | 836 | 0 |
| December | 1,198 | 0 |
| Year (annual) | 7,178 | 558 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00473930. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Jackson been warmer than normal lately?
2025 averaged 47.8°F, 1.0°F above the 1991-2020 normal of 46.7°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 49.4°F | +2.7°F | 24.73 |
| 2022 | 47.1°F | +0.4°F | 40.13 |
| 2023 | 49.6°F | +2.9°F | 31.98 |
| 2024 | 49.9°F | +3.2°F | 38.17 |
| 2025 | 47.8°F | +1.0°F | 34.75 |
Source: observed years: ACIS, station USC00473930. A year counts only with all twelve months complete.
How does Jackson's climate compare?
Jackson is warmer than 130 of the other 164 places with their own NOAA record in Wisconsin, and wetter than 34. Across the 7,247 U.S. stations with normals, its annual mean of 46.7°F is warmer than 26%.
In the Köppen classification computed from these normals, Jackson is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Questions about Jackson's climate
What is the coldest month in Jackson?
January, with a normal high of 28°F and a normal low of 13°F. The warmest is July (82°F by day, 60°F at night).
Does it snow in Jackson?
Yes. NOAA publishes no 1991-2020 snowfall normal for Jackson's NOAA station; the nearest record that keeps one, Germantown (6 miles away), records 54 inches of snow in a normal year.
What is the rainiest month in Jackson?
June, with 4.00 in of precipitation in a normal year; the driest is January with 1.36 in.
What plant hardiness zone is Jackson in?
The USDA's 2023 map puts Jackson in zone 5b in ZIP code 53037. By the same method at Jackson's NOAA station, the coldest night of a typical year reaches −11°F (19 years, 1991-2020): zone 5b.
How late can frost come in Jackson?
In half of years the last 32°F night comes after April 30; in one year in ten it comes after May 15. Waiting until May 15 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wisconsin climateThe statewide normals and every place in the state
- Germantown, WI6 miles from this station, 45.8°F a year
- West Bend, WI6 miles from this station, 46.0°F a year
- Slinger, WI7 miles from this station, 44.4°F a year
- Richfield, WI7 miles from this station, 46.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made