What is the hottest month in New London?

July is the warmest month in New London, with an average high of 83.0°F.

What is the coldest month in New London?

January is the coldest month in New London, with an average low of 19.0°F.

What month does New London get the most rain?

June is typically the wettest month in New London, with about 4.31 inches of precipitation.

What plant hardiness zone is New London in?

New London is approximately in USDA plant hardiness Zone 7a, based on the average annual extreme minimum temperature.

Has the climate in New London changed recently?

9% 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, OH

Climate overview — based on NOAA 1991-2020 normals from NORWALK WWTP, OH US.

Dfa Hot-summer humid continental climate 7a USDA hardiness Zone 7a

Year-round temperatures (°F)

Avg high Avg low

Climate summary

New London has an annual average temperature of 50.5°F with about 40.1 inches of precipitation per year and 32.7 inches of snow. The warmest month is July (average high 83.0°F), and the coldest is January (average low 19.0°F). June is typically the wettest month (4.31 in) and February the driest (2.31 in). Snow typically falls from November through April.

Pleasant months

2 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

47.1°F

warmest to coldest month

Heating need

5,805

HDD/yr

Cooling need

576

CDD/yr

Best time to visit New London

Full guide →

Climate change signal

All-time records →

33 of 366 (9%) 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		41
1900s		35
1910s		43
1920s		26
1930s		76
1940s		19
1950s		21
1960s		10
1970s		9
1980s		16
1990s		15
2000s		11
2010s		30
2020s		14

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	33.4°F	19.0°F	26.2°F	2.68 in	9.7 in	14
February	36.2°F	20.4°F	28.3°F	2.31 in	8.2 in	12
March	45.5°F	27.9°F	36.7°F	2.90 in	5.1 in	12
April	58.7°F	38.1°F	48.4°F	3.95 in	1.6 in	13
May	70.2°F	49.9°F	60.1°F	3.91 in	—	13
June	79.3°F	59.8°F	69.5°F	4.31 in	—	12
July	83.0°F	63.6°F	73.3°F	4.19 in	—	10
August	81.3°F	61.6°F	71.4°F	3.54 in	—	10
September	75.5°F	54.5°F	65.0°F	3.55 in	—	9
October	63.3°F	43.3°F	53.3°F	3.34 in	—	11
November	49.7°F	33.7°F	41.7°F	2.83 in	1.5 in	10
December	38.5°F	25.1°F	31.8°F	2.57 in	6.6 in	12