What is the hottest month in New London?

July is the warmest month in New London, with an average high of 81.1°F.

What is the coldest month in New London?

January is the coldest month in New London, with an average low of 8.3°F.

What month does New London get the most rain?

June is typically the wettest month in New London, with about 4.79 inches of precipitation.

What plant hardiness zone is New London in?

New London is approximately in USDA plant hardiness Zone 6a, based on the average annual extreme minimum temperature.

Has the climate in New London changed recently?

11.2% of New London's all-time daily heat records were set in the last decade (since 2015), compared to roughly 5% if records were evenly distributed over time.

New London, WI

Climate overview — based on NOAA 1991-2020 normals from NEW LONDON, WI US.

Dfb Warm-summer humid continental climate 6a USDA hardiness Zone 6a

Year-round temperatures (°F)

Avg high Avg low

Climate summary

New London has an annual average temperature of 44.8°F with about 34.9 inches of precipitation per year and 45.9 inches of snow. The warmest month is July (average high 81.1°F), and the coldest is January (average low 8.3°F). June is typically the wettest month (4.79 in) and February the driest (1.18 in). Snow typically falls from October through April.

Pleasant months

2 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

53.6°F

warmest to coldest month

Heating need

7,554

HDD/yr

Cooling need

288

CDD/yr

Best time to visit New London

Full guide →

Climate change signal

All-time records →

41 of 366 (11.2%) of New London's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.

1890s		7
1900s		18
1910s		21
1920s		27
1930s		81
1940s		27
1950s		17
1960s		21
1970s		23
1980s		24
1990s		19
2000s		28
2010s		25
2020s		28

Bars: number of all-time daily heat records still standing that were set in each decade.

Monthly averages

Month	Avg High	Avg Low	Avg Temp	Precipitation	Snow	Rainy days
January	24.8°F	8.3°F	16.5°F	1.28 in	10.8 in	8
February	28.6°F	10.8°F	19.7°F	1.18 in	11.0 in	5
March	40.7°F	21.6°F	31.1°F	2.08 in	6.8 in	8
April	54.2°F	33.3°F	43.8°F	3.46 in	3.7 in	10
May	67.6°F	45.3°F	56.4°F	4.21 in	—	12
June	77.0°F	55.0°F	66.0°F	4.79 in	—	11
July	81.1°F	59.0°F	70.1°F	4.06 in	—	10
August	79.2°F	57.7°F	68.5°F	3.73 in	—	10
September	71.7°F	49.0°F	60.4°F	3.43 in	—	10
October	58.1°F	37.5°F	47.8°F	2.92 in	0.2 in	10
November	43.2°F	26.4°F	34.8°F	1.90 in	2.4 in	7
December	30.3°F	15.1°F	22.7°F	1.81 in	11.0 in	8