Ohio has an average annual temperature of
51.8°F
(across all 36 cities) with approximately
958 mm of annual precipitation
and average humidity of 78%.
The warmest city is Cincinnati
with average July highs of 95.7°F,
while Lima
is the coldest with average January lows of -2.2°F.
This page covers 45 years of NASA POWER climate data (1981–2025)
including temperature, rainfall, humidity, wind speed, and solar radiation.
Aug is typically the warmest month across Ohio with average highs around
91.6°F, while
Jan is the coldest with average lows near
2.1°F.
May is the wettest month with approximately
102 mm of rainfall on average.
Month
Max Temp
Min Temp
Avg Temp
Rain (mm)
Humidity
Wind (m/s)
Solar (kWh/m²)
Jan
53.4°F
2.1°F
27.7°F
62
87%
3.1
1.60
Feb
57.9°F
5.7°F
31.8°F
59
85%
2.9
2.50
Mar
68°F
14.4°F
41.2°F
78
81%
2.8
3.50
Apr
75.7°F
24.3°F
50°F
93
78%
2.6
4.70
May
82.2°F
35.8°F
59°F
102
77%
2.1
5.40
Jun
88.2°F
46.2°F
67.3°F
99
76%
1.8
6.00
Jul
90.7°F
54°F
72.3°F
96
73%
1.6
5.90
Aug
91.6°F
51.8°F
71.8°F
81
70%
1.6
5.30
Sep
88.9°F
42.4°F
65.7°F
75
70%
1.8
4.30
Oct
80.2°F
30.7°F
55.6°F
74
73%
2.2
3.00
Nov
68.5°F
21°F
44.8°F
75
79%
2.5
2.00
Dec
56.7°F
9.7°F
33.1°F
74
85%
2.7
1.40
📈 Ohio Yearly Climate Trends
🌡️ Annual Temperature Trend
State-wide avg annual high & low · Last 10 years
📈 Ohio Long-Term Climate Trends (1981–2025)
This chart shows how Ohio's average temperatures have shifted across 45 years.
Use the range buttons to focus on recent decades or view the full historical record.
Data is averaged across all 36 cities in the state.
🌧️ Annual Precipitation Trend
State-wide avg annual precipitation · Last 10 years · mm/year
🔗 Explore Cities in Ohio
Browse detailed weather history, monthly averages, and 45-year climate trends for every city in Ohio.
Cincinnati is the wettest city in Ohio with approximately 1072 mm of annual precipitation on average. View Cincinnati weather history →
What is the warmest month in Ohio?▼
Aug is the warmest month across Ohio, with state-wide average highs of 91.6°F and average lows of 51.8°F.
How many cities in Ohio have weather data?▼
TownPillar has historical weather data for 36 cities in Ohio, covering 45 years of NASA POWER climate records from 1981 to 2025.
Which month has the most sunshine in Ohio?▼
Jun is the sunniest month across Ohio with an average solar radiation of 6.00 kWh/m²/day state-wide. This solar radiation data from NASA POWER is useful for solar energy planning, agriculture, and understanding seasonal sunshine availability.
Where does this climate data come from?▼
All data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis data. It includes monthly temperature, precipitation, humidity, wind speed, and solar radiation at 0.5° × 0.625° spatial resolution.
📚 Data Source
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources). Data covers 45 years (1981–2025) across 36 cities in Ohio at monthly temporal resolution.