Ohio Climate – July 2026 Update
Top 5 Cities: Columbus, Cleveland, Cincinnati, Toledo, and Akron
Summary
Ohio experienced a warm, humid July, ending as the state's 15th warmest on record after an oppressive early heatwave gave way to intense thunderstorm activity. Across the globe, land temperatures reached their 3rd highest level for the period in 87 years of data. High humidity and heavy downpours defined the latter half of the month, with conditions expected to yield to typical late-summer warmth in the coming weeks.
This month in numbers
July 2026 recorded an average temperature of 23.83°C in Ohio, sitting 1.3°C above the 1961 to 1990 baseline to rank as the 15th warmest on record. Daytime maximums averaged 29.61°C (+0.8°C anomaly), while night-time minimums rose to 18.0°C (+1.7°C anomaly), bringing uncomfortable nocturnal mugginess. Precipitation totalled 93.22 mm, which was 10.7 mm below normal and ranked 43rd of 77 years. On a global scale, the monthly land temperature averaged 15.8°C (+1.6°C anomaly), making it the 3rd warmest July on record worldwide.
What changed
Over the three months from May to July 2026, Ohio averaged 19.85°C (+0.4°C anomaly), ranking 36th of 77 years, while total precipitation reached 326.14 mm (+26.4 mm anomaly) to rank 33rd. In contrast, global land temperatures over this three-month period averaged 14.34°C (+1.5°C anomaly), marking the 2nd warmest May to July span on record globally. Within the seven-state NOAA Ohio Valley climate region group, Ohio's monthly anomaly made it the 2nd warmest state in the cluster behind West Virginia.
What’s driving change?
The warmth and humidity were reinforced by that repeatedly stalled warm air masses and tropical moisture across the central United States. effects further prevented night-time cooling in major metropolitan areas, keeping minimum temperatures well above average. All of Ohio's 1 tropical cyclone this year happened in the past month, with its remnant moisture tracked on our live map at Extreme Weather tracker.
Looking ahead
Seasonal forecasts indicate a likelihood of above-average temperatures and variable precipitation continuing across the Ohio Valley through late summer and into early autumn.
Generated by Gemini from climate data and web sources
At a Glance
Temperature – Average
Climate Map – USUnited States
Source: NOAA Climate at a Glance — US states & climate regions (tavg, pcp), plus GPCC (Snow, water-equivalent). Anomalies are vs the 1961–1990 baseline. See methodology.
Typical Climate – Ohio
Köppen Dfa · ContinentalOhio has a continental climate (Köppen Dfa: Humid continental - hot summer), with distinct warm summers and cool-to-cold winters. July is typically the warmest month, averaging 23.6°C, while January is the coldest at -1.5°C. Annual precipitation averages around 1066mm, spread fairly evenly across the year.
Monthly climate normals (2016–2025) - bar colour and height show average temperature, the shaded area shows average monthly rain, with snow (water-equivalent) shown separately.
Data: NOAA National Centers for Environmental Information (temperature/precipitation; frost: World Bank CCKP; snow: GPCC (DWD)).
Long-Term Trends
Combined Timeline – Ohio
Right axis: everything else standardized to standard deviations (σ) from its own average, since mm/hours/days aren't directly comparable to °C or to each other.
Data: NOAA National Centers for Environmental Information (temperature/precipitation; frost: World Bank CCKP; snow: GPCC (DWD)).
Heatwave Days – Ohio
Warm Spell Duration Index (WSDI) - the WMO/ETCCDI heatwave measure: days in a 6+ day run above the local 90th-percentile temperature for that time of year.
Data: World Bank Climate Change Knowledge Portal (ERA5-derived). Refreshed roughly 1-2x/year, ~7-8 months behind present.
Year-on-Year Trends
The 4byo Climate Helix – Ohio
Data: NOAA National Centers for Environmental Information (temperature/precipitation; frost: World Bank CCKP; snow: GPCC (DWD)).
Monthly Temperature – Ohio
Background lines show the last 40 years (plus the record year and its opposite, wherever they fall).
Data: NOAA National Centers for Environmental Information (temperature/precipitation; frost: World Bank CCKP; snow: GPCC (DWD)).
Records – Ohio
NOAA National Centers for Environmental Information (frost: World Bank CCKP; snow: GPCC (DWD)) - Anomalies vs 1901-2000 mean
Shifting Seasons
Warm / cold seasonsKöppen Dfa · ContinentalHow spring and autumn have shifted in Ohio. Spring is defined as the date monthly temperatures first rise above the long-term annual mean (10.1°C, from 1950–1979); autumn is the date they fall back below it. Temperature swings 25.9°C peak-to-peak across the year - a classic four-seasons rhythm.
Baseline vs recent monthly temperature climatology. Biggest warming: Feb (+3.1°C).
Data: NOAA National Centers for Environmental Information (temperature/precipitation; frost: World Bank CCKP; snow: GPCC (DWD)).
Emissions & Energy
Explore
Explore Climate Data
Data Sources
Data Sources for Ohio
Every figure on this page is sourced from official, openly published climate datasets. Anomalies are calculated against the 1961–1990 baseline (temperature) and 1991–2020 (rainfall, sunshine, frost) - see the Methodology & Sources page for the complete dataset list and update calendar.
Statewide monthly temperature and precipitation (nClimDiv).
Frost Days and Heatwave Days (Warm Spell Duration Index), ERA5-derived. World Bank Climate Change Knowledge Portal.
Monthly snow water-equivalent, Global Precipitation Climatology Centre (DWD).
FAQs
FAQs
How is the climate in Ohio changing?
Ohio is warming in line with the rest of the world. The page above shows the latest monthly temperature anomaly versus the 1961-1990 baseline, the long-term annual trend, and the region's rank in the historical record. The headline panel also shows the long-term trend rate per decade and the warmest and coolest years on file.
What is the climate like in Ohio?
Ohio has a continental climate (Köppen Dfa: Humid continental - hot summer), with distinct warm summers and cool-to-cold winters. July is typically the warmest month, averaging 23.6°C, while January is the coldest at -1.5°C. Annual precipitation averages around 1066mm, spread fairly evenly across the year.
Where does the climate data for Ohio come from?
Climate data for Ohio comes from NOAA Climate at a Glance (temperature and precipitation), refreshed every month, when the upstream temperature and rainfall data are refreshed.
What is the climate baseline used on this page?
Anomalies on this page are calculated against the 1961-1990 climatological baseline, which is the standard reference period used by the Met Office, NOAA, IPCC and most national climate services. Some panels also show the source-native 1901-2000 (NOAA) or 1991-2020 (WMO) baselines for verification. See Methodology & Sources for the full reference.
Which areas does the Ohio climate data cover?
The Ohio climate profile covers Columbus, Cleveland, Cincinnati, Toledo and surrounding areas. Ohio climate data from NOAA Climate at a Glance
How often is the Ohio climate update refreshed?
The Ohio climate update is refreshed monthly, typically a few days after the previous month closes and the upstream provider (Met Office HadUK-Grid, NOAA Climate at a Glance, Copernicus ERA5 or the Global Carbon Project) publishes its update. See the Climate Rankings for cross-region comparisons.
What counts as a Heatwave Day on the Ohio climate page?
Heatwave Days use the Warm Spell Duration Index (WSDI) - the WMO/ETCCDI-standard heatwave measure: days that are part of a run of 6 or more consecutive days above the local 90th-percentile temperature for that calendar day. The 90th-percentile threshold varies by time of year (a hot day in January is judged differently to one in July) but is fixed to the 1961-1990 baseline for every year shown - it does not shift as the climate warms, which is why Heatwave Days trend upward over time.
Does the Ohio climate page include frost and snow data?
Yes. Frost Days (days with a minimum temperature below 0°C, World Bank CCKP) and snow water-equivalent (GPCC) are shown alongside temperature and precipitation, each measured against the 1961-1990 baseline where a like-for-like historical comparison is available.