What is the climate like in London, OH?

London has an annual average temperature of 50.4°F with about 42.3 inches of precipitation per year. Climate type: Hot-summer humid continental (Köppen Dfa).

What is the hottest month in London?

July is the warmest month in London, with an average high of 82.2°F.

What is the coldest month in London?

January is the coldest month in London, with an average low of 18.6°F.

What month does London get the most rain?

July is typically the wettest month in London, with about 4.96 inches of precipitation.

What plant hardiness zone is London in?

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

Has the climate in London changed recently?

8.5% of 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.

London, OH

Climate overview — based on NOAA 1991-2020 normals from LONDON FISH HATCHERY, OH US.

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

Year-round temperatures (°F)

Avg high Avg low

Climate summary

London has an annual average temperature of 50.4°F with about 42.3 inches of precipitation per year. The warmest month is July (average high 82.2°F), and the coldest is January (average low 18.6°F). July is typically the wettest month (4.96 in) and February the driest (2.28 in).

Pleasant months

2 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

46.5°F

warmest to coldest month

Heating need

5,799

HDD/yr

Cooling need

528

CDD/yr

Best time to visit London

Full guide →

Climate change signal

All-time records →

31 of 366 (8.5%) of 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.

1910s		6
1920s		34
1930s		84
1940s		49
1950s		36
1960s		24
1970s		25
1980s		41
1990s		18
2000s		13
2010s		13
2020s		23

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	33.2°F	18.6°F	25.9°F	3.12 in	—	10
February	36.7°F	20.6°F	28.6°F	2.28 in	—	8
March	47.7°F	28.5°F	38.1°F	3.70 in	—	9
April	61.1°F	38.5°F	49.8°F	4.05 in	—	11
May	71.3°F	49.8°F	60.5°F	4.67 in	—	11
June	79.3°F	59.6°F	69.5°F	4.71 in	—	10
July	82.2°F	62.6°F	72.4°F	4.96 in	—	10
August	80.9°F	60.5°F	70.7°F	2.87 in	—	7
September	75.7°F	52.8°F	64.2°F	2.91 in	—	7
October	64.0°F	41.1°F	52.5°F	2.83 in	—	7
November	49.8°F	31.8°F	40.8°F	2.96 in	—	8
December	38.5°F	24.0°F	31.3°F	3.22 in	—	8