Wisconsin Climate – June 2026 Update
Top 5 Cities: Milwaukee, Madison, Green Bay, Kenosha, and Racine
This month in numbers
Wisconsin experienced a warmer and wetter June, with the average temperature for the month at 18.5°C, an anomaly of +0.7°C compared to the 1961–1990 baseline, ranking it the 34th warmest June in 77 years of records. Precipitation was also above average, with 116.08 mm falling, an increase of 18 mm, making it the 30th wettest June on record. Globally, June 2026 was the 3rd warmest June on record for land temperatures, with an anomaly of +1°C.
What changed
Looking at the broader picture, the April–June 2026 period saw an average temperature of 13.04°C, an anomaly of +0.8°C, ranking it the 21st warmest such period in 77 years. Precipitation for this three-month period was significantly above average at 107.95 mm, an anomaly of +23.5 mm, making it the 19th wettest April–June on record. Wisconsin's 1-month temperature anomaly of +0.71°C places it 184th out of 234 regions globally, while its 3-month anomaly of +0.80°C ranks it 187th. The state's 12-month rolling anomaly of +1.54°C places it 127th globally. The entire NOAA Upper Midwest US climate region, which includes Wisconsin, also experienced warmer-than-average conditions, with a 1-month anomaly of +0.68°C.
What’s driving change?
The warmer conditions in Wisconsin align with the broader trend of land warming faster than ocean, and the , where higher-latitude regions tend to warm more rapidly. Wisconsin has also seen a notable cluster of wildfire activity recently, with four wildfire events occurring between June 27 and July 12, representing 100% of the annual total for the past 12 months. This unusual concentration of wildfires for the region and season can be tracked further at Extreme Weather tracker. The emergence of El Niño conditions, which are likely to persist through at least the end of 2026, is also a significant climate driver. El Niño is typically associated with warmer, drier conditions in northern states like Wisconsin due to shifts in the Pacific jet stream.
Looking ahead
NOAA's Climate Prediction Center indicates equal chances of above, near, or below-average temperatures and rainfall for Wisconsin for the summer months of June, July, and August.
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.
Year-on-Year Trends
The 4byo Climate Helix – Wisconsin
Data: NOAA National Centers for Environmental Information. Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Wisconsin – Monthly Temperature – All Years
Data: NOAA National Centers for Environmental Information. Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Records – Wisconsin
NOAA National Centers for Environmental Information - Anomalies vs 1901-2000 mean
Shifting Seasons
Warm/cold + wet/dryKöppen Dfb · ContinentalWisconsin has both a clear warm/cold cycle (±16.0°C) and a wet/dry cycle (4× wet:dry ratio). Both sides of the annual rhythm are shown below.
Monthly rainfall climatology. A “wet month” exceeds the baseline monthly mean (dashed gold line). Biggest month-to-month shift: Oct (+20 mm, +34%).
Data: NOAA National Centers for Environmental Information. Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Rainfall & Precipitation
Rainfall & Rain Days – Totals
Emissions & Energy
Explore
Explore Climate Data
Data Sources
Data Sources for Wisconsin
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 Wisconsin changing?
Wisconsin 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 Wisconsin come from?
Climate data for Wisconsin 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 Wisconsin climate data cover?
The Wisconsin climate profile covers Milwaukee, Madison, Green Bay, Kenosha and surrounding areas. Wisconsin climate data from NOAA Climate at a Glance
How often is the Wisconsin climate update refreshed?
The Wisconsin 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.