Monitored days with good air quality
67.0%
2025 · U.S. EPA AirData
Annual fires
≈ 900
Area in drought (D1–D4), yearly average
13.5%
2025 · U.S. Drought Monitor
Total withdrawals
≈ 8.5 B gal/day
Energy-related CO₂ emissions
194
2021 · U.S. EIA State Energy Data System
Average annual temperature
51.9
2025 · NOAA National Centers for Environmental Information
Air Quality
Pollution levels.
Monitored days with good air quality
67.0%
2025 · U.S. EPA AirData
Monitored days unhealthy for sensitive groups or worse
0.9%
2025 · U.S. EPA AirData
Average PM2.5
9.1 µg/m³
Ozone alerts
Cleveland, Cincinnati
Monitored days with good air quality
1990–202567%
U.S. EPA AirData, Annual AQI by County, all monitored Ohio counties.
Monitored days unhealthy for sensitive groups or worse
1990–20250.9%
U.S. EPA AirData, Annual AQI by County (AQI above 100).
| Indicator | Ohio | U.S. |
|---|---|---|
| Average PM2.5 (µg/m³)2023, EPA | 9.1 | 8.2 |
Wildfires
Fire activity.
Annual fires
≈ 900
Acres burned
≈ 4,500
Risk level
Very low
| Indicator | Ohio | U.S. |
|---|---|---|
| Acres burned per year (thousands)2023, NIFC | 4.5 | 7000 |
Drought
Dry conditions.
Area in drought (D1–D4), yearly average
13.5%
2025 · U.S. Drought Monitor
Area in extreme or exceptional drought (D3–D4)
2.4%
2025 · U.S. Drought Monitor
Severe drought
Rare
Risk level
Low
Area in drought (D1–D4), yearly average
2000–202513.5%
U.S. Drought Monitor (NDMC / USDA / NOAA), average of weekly maps.
Area in extreme or exceptional drought (D3–D4)
2000–20252.4%
U.S. Drought Monitor (NDMC / USDA / NOAA), average of weekly maps.
| Indicator | Ohio | U.S. |
|---|---|---|
| Share of area in drought (%)2024, US Drought Monitor | 8 | 26 |
Water Usage
Water withdrawals.
Total withdrawals
≈ 8.5 B gal/day
Main use
Thermoelectric power
Public supply
≈ 1.4 B gal/day
| Indicator | Ohio | U.S. |
|---|---|---|
| Water withdrawals per capita (gal/day)2020, USGS | 715 | 1000 |
- •Ohio borders Lake Erie, part of the largest freshwater system on Earth.
Emissions
Greenhouse gases.
Energy-related CO₂ emissions
194
2021 · U.S. EIA State Energy Data System
Transportation CO₂ emissions
58.8
2021 · U.S. EIA State Energy Data System
Rank
5th in the U.S.
Per capita
17.3 t
Energy-related CO₂ emissions
1970–2021194▼ 30%
U.S. EIA State Energy Data System, all sectors and fuels (FRED EMISSCO2TOTVTTTOOHA).
Transportation CO₂ emissions
1970–202158.8▲ 23%
U.S. EIA State Energy Data System, transportation sector (FRED EMISSCO2TOTVTCTOOHA).
| Indicator | Ohio | U.S. |
|---|---|---|
| CO2 emissions per capita (t)2023, EIA | 17.3 | 14.4 |
Climate Indicators
Temperature and rainfall.
Average annual temperature
51.9
2025 · NOAA National Centers for Environmental Information
Annual precipitation
39.1
2025 · NOAA National Centers for Environmental Information
Average temperature
11.3 °C
Warming since 1900
+0.8 °C
Average annual temperature
1895–202551.9▲ 6%
NOAA National Centers for Environmental Information, Climate at a Glance, statewide January–December average.
Annual precipitation
1895–202539.11▲ 38%
NOAA National Centers for Environmental Information, Climate at a Glance, statewide January–December total.
| Indicator | Ohio | U.S. |
|---|---|---|
| Annual precipitation (mm)NOAA normals | 1040 | 767 |