New London, Wisconsin climate: Normal weather by month, frost dates and records
New London's normal year runs from 8°F January nights to 81°F July afternoons, with 34.9 inches of precipitation and 46 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.1°C, January lows of −13°C, July highs of 27°C, 885 mm of precipitation a year.
- NOAA stationNew London
- Station IDUSC00475932
- Location44.36°N 88.72°W
- Elevation800 ft (244 m)
- From the center3 miles
- Population7,524
On October 22, the normal high in New London is 55°F and the normal low 36°F, and the chance of measurable rain or snow is 31%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for New London.
- Jan 25° 8°
- Feb 29° 11°
- Mar 41° 22°
- Apr 54° 33°
- May 68° 45°
- Jun 77° 55°
- Jul 81° 59°
- Aug 79° 58°
- Sep 72° 49°
- Oct 58° 38°
- Nov 43° 26°
- Dec 30° 15°
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 New London each month?
July is the warmest month, with normal highs of 81°F; January the coldest, with normal lows of 8°F. The most precipitation falls in June (4.79 in), the least in February (1.18 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 25°F | 8°F | 16.5°F | 1.28 | 10.8 | 8 | <1 | 30 | 9 h 10 min |
| February | 29°F | 11°F | 19.7°F | 1.18 | 11.0 | 5 | <1 | 27 | 10 h 30 min |
| March | 41°F | 22°F | 31.1°F | 2.08 | 6.8 | 8 | <1 | 26 | 11 h 50 min |
| April | 54°F | 33°F | 43.8°F | 3.46 | 3.7 | 10 | <1 | 15 | 13 h 20 min |
| May | 68°F | 45°F | 56.4°F | 4.21 | 0.0 | 12 | <1 | 2 | 14 h 50 min |
| June | 77°F | 55°F | 66.0°F | 4.79 | 0.0 | 11 | 1 | <1 | 15 h 30 min |
| July | 81°F | 59°F | 70.1°F | 4.06 | 0.0 | 10 | 3 | <1 | 15 h 10 min |
| August | 79°F | 58°F | 68.5°F | 3.73 | 0.0 | 10 | 1 | <1 | 14 h 10 min |
| September | 72°F | 49°F | 60.4°F | 3.43 | 0.0 | 10 | <1 | 1 | 12 h 40 min |
| October | 58°F | 38°F | 47.8°F | 2.92 | 0.2 | 10 | <1 | 10 | 11 h |
| November | 43°F | 26°F | 34.8°F | 1.90 | 2.4 | 7 | <1 | 22 | 9 h 40 min |
| December | 30°F | 15°F | 22.7°F | 1.81 | 11.0 | 8 | <1 | 30 | 8 h 50 min |
| Year (annual) | 55°F | 35°F | 44.8°F | 34.85 | 45.9 | 110 | 6 | 164 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −4°C | −13°C | −8.6°C | 33 mm | 27 cm |
| February | −2°C | −12°C | −6.8°C | 30 mm | 28 cm |
| March | 5°C | −6°C | −0.5°C | 53 mm | 17 cm |
| April | 12°C | 1°C | 6.6°C | 88 mm | 9 cm |
| May | 20°C | 7°C | 13.6°C | 107 mm | 0 cm |
| June | 25°C | 13°C | 18.9°C | 122 mm | 0 cm |
| July | 27°C | 15°C | 21.2°C | 103 mm | 0 cm |
| August | 26°C | 14°C | 20.3°C | 95 mm | 0 cm |
| September | 22°C | 9°C | 15.8°C | 87 mm | 0 cm |
| October | 15°C | 3°C | 8.8°C | 74 mm | 1 cm |
| November | 6°C | −3°C | 1.6°C | 48 mm | 6 cm |
| December | −1°C | −9°C | −5.2°C | 46 mm | 28 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00475932; 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 New London?
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 USC00475932.
When is the last frost in New London?
In New London, the last spring frost (32°F) comes after May 4 in half of years and after May 19 in one year in ten; the first autumn frost comes before October 6 in half of years and before September 22 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 41 year in 10 after May 19; 9 in 10 after April 21
- First autumn frost, half of years before
- October 61 year in 10 before September 22; 9 in 10 before October 22
NOAA puts the median frost-free season at 153 days, and the season without a hard freeze (28°F) at 176 days.
A hard freeze (28°F) comes after April 24 in half of springs and before October 18 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts New London in zone 5a in ZIP code 54961, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, New London's NOAA station is in zone 5a: the coldest night of a typical year reaches −17°F (27 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 USC00475932; 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 New London?
In a normal year in New London, 6 days a year reach 90°F, 164 nights fall to 32°F or colder and 110 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
- 164a normal year
- Days that stay below freezing
- 70high of 32°F or less
- Days with 0.01 inch of precipitation
- 110a normal year
- Days with 1 inch of snow or more
- 15a normal year
The highest temperature in this station's record (since 1896) is 109°F, on July 13, 1936; the lowest is −37°F, on February 11, 1899.
The wettest calendar year on that record is 2024, with 48.93 in; the snowiest season is 1951–52, with 92.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00475932; records: ACIS (NOAA Regional Climate Centers), station USC00475932. Records use complete months only; a month missing more than three days is left out.
How sunny is New London?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around New London, 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 New London need?
A normal year in New London brings 7,816 heating degree days, 45% more than the median U.S. place (5,373), and 497 cooling degree days, 45% 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 2,378 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,502 | 0 |
| February | 1,268 | 0 |
| March | 1,050 | 1 |
| April | 639 | 1 |
| May | 292 | 27 |
| June | 72 | 102 |
| July | 20 | 176 |
| August | 34 | 141 |
| September | 186 | 47 |
| October | 537 | 4 |
| November | 906 | 0 |
| December | 1,311 | 0 |
| Year (annual) | 7,816 | 497 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00475932. 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 New London been warmer than normal lately?
2024 averaged 49.2°F, 4.4°F above the 1991-2020 normal of 44.8°F. 3 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 46.7°F | +1.9°F | 34.25 | 40.4 |
| 2022 | 44.6°F | −0.2°F | 36.45 | 34.6 |
| 2023 | 48.0°F | +3.2°F | 29.62 | 53.3 |
| 2024 | 49.2°F | +4.4°F | 48.93 | 44.6 |
Over 85 complete years from 1898 to 2024, the station's annual mean temperature rose at a fitted 2.6°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 USC00475932; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does New London's climate compare?
New London is warmer than 74 of the other 164 places with their own NOAA record in Wisconsin, and wetter than 84. Across the 7,247 U.S. stations with normals, its annual mean of 44.8°F is warmer than 18%.
In the Köppen classification computed from these normals, New London 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 New London share this climate record?
6 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.
- Hortonville, WI3,331 people · 4 mi E
- Shiocton, WI932 people · 9 mi NE
- Dale, WI680 people · 6 mi S
- Fremont, WI677 people · 10 mi SW
- Winchester, WI619 people · 11 mi S
- Northport, WI421 people · 6 mi NW
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 New London's climate
What is the coldest month in New London?
January, with a normal high of 25°F and a normal low of 8°F. The warmest is July (81°F by day, 59°F at night).
Does it snow in New London?
Yes: 46 inches in a normal year, falling on 26 days with 0.1 inch or more, the most in February (11.0 inches).
What is the rainiest month in New London?
June, with 4.79 in of precipitation in a normal year; the driest is February with 1.18 in.
What plant hardiness zone is New London in?
The USDA's 2023 map puts New London in zone 5a in ZIP code 54961, the nearest ZIP area. By the same method at New London's NOAA station, the coldest night of a typical year reaches −17°F (27 years, 1991-2020): zone 5a.
How late can frost come in New London?
In half of years the last 32°F night comes after May 4; in one year in ten it comes after May 19. Waiting until May 19 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wisconsin climateThe statewide normals and every place in the state
- Appleton, WI15 miles from this station, 45.6°F a year
- Waupaca, WI17 miles from this station, 44.8°F a year
- Clintonville, WI18 miles from this station, 44.5°F a year
- Oshkosh, WI27 miles from this station, 46.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made