Mazomanie, Wisconsin climate: Normal weather by month, frost dates and records
Mazomanie's normal year runs from 7°F January nights to 82°F July afternoons, with 35.8 inches of precipitation and 30 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.7°C, January lows of −14°C, July highs of 28°C, 910 mm of precipitation a year.
- NOAA stationMazomanie Wastewater Treatment Plant
- Station IDUSC00475189
- Location43.17°N 89.82°W
- Elevation764 ft (233 m)
- Population1,769
On October 14, the normal high in Mazomanie is 62°F and the normal low 37°F, and the chance of measurable rain or snow is 23%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Mazomanie.
- Jan 28° 7°
- Feb 33° 10°
- Mar 44° 22°
- Apr 58° 33°
- May 70° 45°
- Jun 79° 55°
- Jul 82° 58°
- Aug 81° 57°
- Sep 74° 47°
- Oct 61° 37°
- Nov 46° 26°
- Dec 34° 14°
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 Mazomanie each month?
July is the warmest month, with normal highs of 82°F; January the coldest, with normal lows of 7°F. The most precipitation falls in June (5.62 in), the least in February (1.32 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 28°F | 7°F | 17.5°F | 1.54 | 7.7 | 5 | <1 | 30 | 9 h 20 min |
| February | 33°F | 10°F | 21.4°F | 1.32 | 9.5 | 6 | <1 | 27 | 10 h 30 min |
| March | 44°F | 22°F | 32.9°F | 2.29 | 4.1 | 6 | <1 | 25 | 11 h 50 min |
| April | 58°F | 33°F | 45.1°F | 3.81 | 1.0 | 8 | <1 | 13 | 13 h 20 min |
| May | 70°F | 45°F | 57.4°F | 4.38 | 0.0 | 10 | 1 | 2 | 14 h 40 min |
| June | 79°F | 55°F | 66.7°F | 5.62 | 0.0 | 9 | 1 | <1 | 15 h 20 min |
| July | 82°F | 58°F | 70.0°F | 3.93 | 0.0 | 7 | 4 | <1 | 15 h 10 min |
| August | 81°F | 57°F | 68.9°F | 3.26 | 0.0 | 7 | 3 | <1 | 14 h |
| September | 74°F | 47°F | 60.7°F | 2.84 | 0.0 | 7 | 1 | 1 | 12 h 30 min |
| October | 61°F | 37°F | 48.7°F | 2.88 | 0.5 | 7 | <1 | 10 | 11 h 10 min |
| November | 46°F | 26°F | 36.2°F | 2.33 | 0.7 | 6 | <1 | 19 | 9 h 50 min |
| December | 34°F | 14°F | 23.8°F | 1.61 | 6.5 | 6 | <1 | 28 | 9 h |
| Year (annual) | 57°F | 34°F | 45.8°F | 35.81 | 30.0 | 85 | 11 | 156 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −2°C | −14°C | −8.1°C | 39 mm | 20 cm |
| February | 0°C | −12°C | −5.9°C | 34 mm | 24 cm |
| March | 7°C | −6°C | 0.5°C | 58 mm | 10 cm |
| April | 14°C | 0°C | 7.3°C | 97 mm | 3 cm |
| May | 21°C | 7°C | 14.1°C | 111 mm | 0 cm |
| June | 26°C | 13°C | 19.3°C | 143 mm | 0 cm |
| July | 28°C | 14°C | 21.1°C | 100 mm | 0 cm |
| August | 27°C | 14°C | 20.5°C | 83 mm | 0 cm |
| September | 23°C | 9°C | 15.9°C | 72 mm | 0 cm |
| October | 16°C | 3°C | 9.3°C | 73 mm | 1 cm |
| November | 8°C | −3°C | 2.3°C | 59 mm | 2 cm |
| December | 1°C | −10°C | −4.6°C | 41 mm | 17 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00475189; 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 Mazomanie?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (7).
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 USC00475189.
When is the last frost in Mazomanie?
In Mazomanie, the last spring frost (32°F) comes after May 7 in half of years and after May 22 in one year in ten; the first autumn frost comes before October 1 in half of years and before September 18 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
- May 71 year in 10 after May 22; 9 in 10 after April 22
- First autumn frost, half of years before
- October 11 year in 10 before September 18; 9 in 10 before October 16
NOAA puts the median frost-free season at 148 days, and the season without a hard freeze (28°F) at 167 days.
A hard freeze (28°F) comes after April 27 in half of springs and before October 12 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Mazomanie in zone 5a in ZIP code 53560, the nearest ZIP area.
Frost dates for every NOAA station in Wisconsin · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00475189; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Mazomanie?
In a normal year in Mazomanie, 11 days a year reach 90°F, 156 nights fall to 32°F or colder and 85 days bring measurable precipitation.
- Days at 90°F or more
- 11a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 156a normal year
- Days that stay below freezing
- 55high of 32°F or less
- Days with 0.01 inch of precipitation
- 85a normal year
- Days with 1 inch of snow or more
- 12a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00475189.
How sunny is Mazomanie?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Mazomanie, 3.9 kWh per square metre a day. July is the sunniest month (80%) and December the cloudiest (60%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 66% | 1.7 |
| February | 73% | 2.8 |
| March | 72% | 3.8 |
| April | 67% | 4.6 |
| May | 70% | 5.5 |
| June | 75% | 6.1 |
| July | 80% | 6.2 |
| August | 78% | 5.3 |
| September | 77% | 4.2 |
| October | 68% | 2.8 |
| November | 66% | 1.8 |
| December | 60% | 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 Mazomanie need?
A normal year in Mazomanie brings 7,497 heating degree days, 40% more than the median U.S. place (5,373), and 528 cooling degree days, 42% 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 2,486 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,471 | 0 |
| February | 1,219 | 0 |
| March | 997 | 2 |
| April | 600 | 3 |
| May | 276 | 42 |
| June | 59 | 111 |
| July | 19 | 172 |
| August | 27 | 146 |
| September | 178 | 48 |
| October | 510 | 6 |
| November | 864 | 0 |
| December | 1,279 | 0 |
| Year (annual) | 7,497 | 528 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00475189. 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.
How does Mazomanie's climate compare?
Mazomanie is warmer than 99 of the other 164 places with their own NOAA record in Wisconsin, and wetter than 104. Across the 7,247 U.S. stations with normals, its annual mean of 45.8°F is warmer than 23%.
In the Köppen classification computed from these normals, Mazomanie 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.
Which places near Mazomanie share this climate record?
4 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Mount Horeb, WI7,803 people · 12 mi S
- Black Earth, WI1,511 people · 4 mi SE
- Blue Mounds, WI918 people · 11 mi S
- Arena, WI894 people · 4 mi W
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Mazomanie's climate
What is the coldest month in Mazomanie?
January, with a normal high of 28°F and a normal low of 7°F. The warmest is July (82°F by day, 58°F at night).
Does it snow in Mazomanie?
Yes: 30 inches in a normal year, falling on 15 days with 0.1 inch or more, the most in February (9.5 inches).
What is the rainiest month in Mazomanie?
June, with 5.62 in of precipitation in a normal year; the driest is February with 1.32 in.
What plant hardiness zone is Mazomanie in?
The USDA's 2023 map puts Mazomanie in zone 5a in ZIP code 53560, the nearest ZIP area.
How late can frost come in Mazomanie?
In half of years the last 32°F night comes after May 7; in one year in ten it comes after May 22. Waiting until May 22 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wisconsin climateThe statewide normals and every place in the state
- Sauk City, WI7 miles from this station, 45.9°F a year
- Lodi, WI18 miles from this station, 47.1°F a year
- Lone Rock, WI19 miles from this station, 47.3°F a year
- Charmany Farm, WI19 miles from this station, 46.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made