Chilton, Wisconsin climate: Normal weather by month, frost dates and records
Chilton's normal year runs from 10°F January nights to 82°F July afternoons, with 33.9 inches of precipitation and 44 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.6°C, January lows of −12°C, July highs of 28°C, 860 mm of precipitation a year.
- NOAA stationChilton
- Station IDUSC00471568
- Location44.03°N 88.15°W
- Elevation840 ft (256 m)
- From the centerunder 1 mile
- Population4,183
On October 23, the normal high in Chilton is 55°F and the normal low 37°F, and the chance of measurable rain or snow is 34%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Chilton.
- Jan 26° 10°
- Feb 29° 12°
- Mar 41° 22°
- Apr 54° 34°
- May 67° 45°
- Jun 77° 56°
- Jul 82° 61°
- Aug 80° 59°
- Sep 73° 51°
- Oct 59° 39°
- Nov 44° 28°
- Dec 31° 17°
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 Chilton each month?
July is the warmest month, with normal highs of 82°F; January the coldest, with normal lows of 10°F. The most precipitation falls in June (4.74 in), the least in February (1.29 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 26°F | 10°F | 17.8°F | 1.48 | 11.3 | 10 | <1 | 30 | 9 h 10 min |
| February | 29°F | 12°F | 20.8°F | 1.29 | 11.3 | 9 | <1 | 27 | 10 h 30 min |
| March | 41°F | 22°F | 31.6°F | 1.92 | 5.8 | 9 | <1 | 26 | 11 h 50 min |
| April | 54°F | 34°F | 44.0°F | 3.07 | 2.6 | 11 | <1 | 14 | 13 h 20 min |
| May | 67°F | 45°F | 56.4°F | 3.78 | 0.1 | 12 | <1 | 2 | 14 h 40 min |
| June | 77°F | 56°F | 66.6°F | 4.74 | 0.0 | 11 | 2 | <1 | 15 h 30 min |
| July | 82°F | 61°F | 71.0°F | 3.91 | 0.0 | 11 | 3 | <1 | 15 h 10 min |
| August | 80°F | 59°F | 69.2°F | 3.60 | 0.0 | 11 | 1 | <1 | 14 h |
| September | 73°F | 51°F | 61.6°F | 3.31 | 0.0 | 10 | <1 | <1 | 12 h 40 min |
| October | 59°F | 39°F | 48.9°F | 2.98 | 0.6 | 11 | <1 | 7 | 11 h 10 min |
| November | 44°F | 28°F | 36.0°F | 2.10 | 1.9 | 9 | <1 | 21 | 9 h 40 min |
| December | 31°F | 17°F | 24.4°F | 1.67 | 9.9 | 10 | <1 | 29 | 9 h |
| Year (annual) | 55°F | 36°F | 45.7°F | 33.85 | 43.5 | 122 | 6 | 155 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −4°C | −12°C | −7.9°C | 38 mm | 29 cm |
| February | −1°C | −11°C | −6.2°C | 33 mm | 29 cm |
| March | 5°C | −5°C | −0.2°C | 49 mm | 15 cm |
| April | 12°C | 1°C | 6.7°C | 78 mm | 7 cm |
| May | 20°C | 7°C | 13.6°C | 96 mm | 0 cm |
| June | 25°C | 13°C | 19.2°C | 120 mm | 0 cm |
| July | 28°C | 16°C | 21.7°C | 99 mm | 0 cm |
| August | 26°C | 15°C | 20.7°C | 91 mm | 0 cm |
| September | 23°C | 10°C | 16.4°C | 84 mm | 0 cm |
| October | 15°C | 4°C | 9.4°C | 76 mm | 2 cm |
| November | 7°C | −2°C | 2.2°C | 53 mm | 5 cm |
| December | 0°C | −8°C | −4.2°C | 42 mm | 25 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00471568; 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 Chilton?
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 (10).
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 USC00471568.
When is the last frost in Chilton?
In Chilton, the last spring frost (32°F) comes after May 1 in half of years and after May 17 in one year in ten; the first autumn frost comes before October 14 in half of years and before September 29 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 11 year in 10 after May 17; 9 in 10 after April 19
- First autumn frost, half of years before
- October 141 year in 10 before September 29; 9 in 10 before October 30
NOAA puts the median frost-free season at 162 days, and the season without a hard freeze (28°F) at 187 days.
A hard freeze (28°F) comes after April 22 in half of springs and before October 27 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Chilton in zone 5b in ZIP code 53014, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Chilton's NOAA station is in zone 5b: the coldest night of a typical year reaches −13°F (30 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 USC00471568; 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 Chilton?
In a normal year in Chilton, 6 days a year reach 90°F, 155 nights fall to 32°F or colder and 122 days bring measurable precipitation.
- Days at 90°F or more
- 6a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 155a normal year
- Days that stay below freezing
- 67high of 32°F or less
- Days with 0.01 inch of precipitation
- 122a normal year
- Days with 1 inch of snow or more
- 16a normal year
The highest temperature in this station's record (since 1894) is 103°F, on July 14, 1995; the lowest is −34°F, on February 10, 1899.
The wettest calendar year on that record is 2019, with 47.24 in; the snowiest season is 1958–59, with 74.7 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00471568; records: ACIS (NOAA Regional Climate Centers), station USC00471568. Records use complete months only; a month missing more than three days is left out.
How sunny is Chilton?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Chilton, 3.8 kWh per square metre a day. July is the sunniest month (80%) and December the cloudiest (58%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 65% | 1.6 |
| February | 72% | 2.7 |
| March | 72% | 3.8 |
| April | 68% | 4.6 |
| May | 71% | 5.6 |
| June | 74% | 6.1 |
| July | 80% | 6.3 |
| August | 77% | 5.3 |
| September | 76% | 4.1 |
| October | 68% | 2.6 |
| November | 65% | 1.7 |
| December | 58% | 1.2 |
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 Chilton need?
A normal year in Chilton brings 7,552 heating degree days, 41% more than the median U.S. place (5,373), and 556 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 2,499 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,465 | 0 |
| February | 1,237 | 0 |
| March | 1,034 | 0 |
| April | 630 | 2 |
| May | 293 | 27 |
| June | 66 | 114 |
| July | 13 | 201 |
| August | 25 | 155 |
| September | 156 | 54 |
| October | 502 | 4 |
| November | 870 | 0 |
| December | 1,260 | 0 |
| Year (annual) | 7,552 | 556 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00471568. 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 Chilton been warmer than normal lately?
2025 averaged 45.8°F, 0.1°F above the 1991-2020 normal of 45.7°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 47.5°F | +1.8°F | 34.14 | 30.9 |
| 2022 | 45.1°F | −0.6°F | 32.51 | 37.7 |
| 2023 | 47.4°F | +1.7°F | 29.63 | 58.1 |
| 2024 | 48.6°F | +2.9°F | 42.08 | 49.9 |
| 2025 | 45.8°F | +0.1°F | 28.39 | 48.6 |
Over 75 complete years from 1896 to 2025, the station's annual mean temperature rose at a fitted 2.5°F per century (+0.14°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00471568; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Chilton's climate compare?
Chilton is warmer than 94 of the other 164 places with their own NOAA record in Wisconsin, and wetter than 57. Across the 7,247 U.S. stations with normals, its annual mean of 45.7°F is warmer than 22%.
In the Köppen classification computed from these normals, Chilton 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 Chilton share this climate record?
5 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.
- Kiel, WI3,975 people · 10 mi SE
- New Holstein, WI3,051 people · 6 mi SE
- St. Nazianz, WI713 people · 11 mi E
- Stockbridge, WI659 people · 8 mi W
- Brothertown, WI216 people · 9 mi SW
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 Chilton's climate
What is the coldest month in Chilton?
January, with a normal high of 26°F and a normal low of 10°F. The warmest is July (82°F by day, 61°F at night).
Does it snow in Chilton?
Yes: 44 inches in a normal year, falling on 28 days with 0.1 inch or more, the most in January (11.3 inches).
What is the rainiest month in Chilton?
June, with 4.74 in of precipitation in a normal year; the driest is February with 1.29 in.
What plant hardiness zone is Chilton in?
The USDA's 2023 map puts Chilton in zone 5b in ZIP code 53014, the nearest ZIP area. By the same method at Chilton's NOAA station, the coldest night of a typical year reaches −13°F (30 years, 1991-2020): zone 5b.
How late can frost come in Chilton?
In half of years the last 32°F night comes after May 1; in one year in ten it comes after May 17. Waiting until May 17 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wisconsin climateThe statewide normals and every place in the state
- Brillion, WI9 miles from this station, 45.2°F a year
- Oshkosh, WI21 miles from this station, 46.3°F a year
- Appleton, WI22 miles from this station, 45.6°F a year
- Plymouth, WI22 miles from this station, 45.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made