US Ohio Valley Climate – June 2026 Update
Top States: Ohio, Illinois, Missouri, Indiana, and Tennessee
This month in numbers
The Ohio Valley region experienced a significantly warmer June, with temperatures averaging +0.50°C above the 1961–1990 baseline. This continues a pronounced warming trend, as the 3-month anomaly stands at +1.55°C and the 12-month rolling anomaly at +1.64°C. Globally, June saw a striking concentration of warmth in Europe, with 9 of the top 10 warmest 1-month anomalies being countries in that continent.
Hottest & coolest US states
Within the Ohio Valley, West Virginia US West Virginia was the warmest state in June, recording an anomaly of +0.81°C. Missouri US Missouri and Kentucky US Kentucky also experienced notably warmer conditions, at +0.71°C and +0.61°C respectively. Indiana US Indiana was the coolest state in the region, though still registering a positive anomaly of +0.10°C.
What's driving change?
The current strong El Niño event, with a NOAA ONI 3-month anomaly of +0.98°C, is a significant factor influencing the region's climate. El Niño conditions typically lead to warmer and drier winters in the Ohio Valley, and while June is outside the typical winter impact period, the strong El Niño is contributing to the overall warmer trend. The region also experienced several severe weather events in June, including a heatwave towards the end of the month with heat index values exceeding 100°F, and multiple severe thunderstorms, tornadoes, and flash flooding incidents across parts of the Ohio Valley. These extreme weather events, alongside the broader trend of seasonal shifts, highlight the ongoing changes in regional weather patterns.
Looking ahead
The current strong El Niño is expected to persist through the end of the year, with a 100% probability of El Niño conditions continuing through October, November, and December. This suggests a continued likelihood of warmer and drier conditions for the Ohio Valley in the coming months, particularly during the winter season.
Generated by Gemini from climate data and web sources
At a Glance
Temperature – Average
Climate Map – USA
Source: NOAA Climate at a Glance — US states & climate regions (tavg, pcp). Anomalies are vs the 1961–1990 baseline (temperature) or 1991–2020 (rainfall). See methodology.
Hottest & Coolest in US Ohio Valley this Month
1-month anomaly vs 1961–1990 across the 7 members we cover. Click a name to open its profile.
Member States
Year-on-Year Trends
The 4byo Climate Helix – US Ohio Valley
NOAA Climate at a Glance — regional tavg / pcp (monthly absolutes).
US Ohio Valley – Monthly Temperature – All Years
NOAA Climate at a Glance — regional tavg / pcp (monthly absolutes).
Records – US Ohio Valley
NOAA Climate at a Glance - regional tavg / pcp - Anomalies vs 1901-2000 mean
Shifting Seasons
Warm / cold seasonsHow spring and autumn have shifted in US Ohio Valley. Spring is defined as the date monthly temperatures first rise above the long-term annual mean (11.7°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: Mar (+2.5°C).
NOAA Climate at a Glance — regional tavg. Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Rainfall & Rain Days – Totals
Climate Systems
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Emissions & Energy
Explore
Explore Climate Data
Data Sources
Data Sources for US Ohio Valley
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.
FAQs
FAQs
How is the climate in US Ohio Valley changing?
US Ohio Valley 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.
Where does the climate data for US Ohio Valley come from?
Climate data for US Ohio Valley comes from authoritative climate datasets including national meteorological services and peer-reviewed reanalyses, 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 US Ohio Valley climate data cover?
The US Ohio Valley climate profile covers Ohio, Illinois, Missouri, Indiana and surrounding areas. NOAA Ohio Valley - IL, IN, KY, MO, OH, TN, WV
How often is the US Ohio Valley climate update refreshed?
The US Ohio Valley 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.