Michigan Climate – July 2026 Update
Top 5 Cities: Detroit, Grand Rapids, Warren, Sterling Heights, and Ann Arbor
Summary
Michigan recorded its 8th warmest July on record as summer heat stretched across the Great Lakes. The state average temperature reached 22.11°C, sitting 2.0°C above the historic baseline, while precipitation ran below normal. The warmth built as global land temperatures hit record-near heights, with elevated temperatures favoured to persist across the region into autumn.
This month in numbers
The month was highlighted by an average temperature of 22.11°C (+2.0°C vs the 1961-1990 baseline), ranking as Michigan's 8th warmest July in 77 years of records. Daytime maximum temperatures averaged 28.5°C, making it the 9th warmest July for peak afternoon heat. Rainfall was sparse, with 64.01 mm of precipitation falling state-wide (-10.3 mm vs baseline) to rank 64th driest. Internationally, global land temperatures reached 15.8°C, marking the 3rd warmest July on record globally.
What changed
Looking across the broader May to July season, Michigan averaged 17.26°C, sitting 0.7°C above baseline to rank as the 26th warmest such stretch on record. Total three-month precipitation reached 215.14 mm, ranking 62nd wettest. Globally, the May to July period recorded its 2nd warmest land temperatures on record at 14.34°C (+1.5°C anomaly). Within its regional group, Michigan tracked closely with neighbouring states, registering a monthly anomaly just 0.05°C higher than the Upper Midwest US climate region average.
What’s driving change?
The warmth in Michigan is being propelled by atmospheric that parked warm air masses over the Midwest, combined with the fundamental climate pattern where . All of Michigan's 1 flood this year has happened in the past month, which is tracked on our live map at Extreme Weather tracker. All of Michigan's 2 wildfires this year have happened in the past month as drier conditions took hold across northern forests.
Looking ahead
Seasonal outlooks from the NOAA Climate Prediction Center favour above-normal temperatures and near-average precipitation across Michigan through the coming months into 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 – Michigan
Köppen Dfb · ContinentalMichigan has a continental climate (Köppen Dfb: Humid continental - warm summer), with distinct warm summers and cool-to-cold winters. July is typically the warmest month, averaging 21.0°C, while January is the coldest at -5.4°C. Annual precipitation averages around 899mm, 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 – Michigan
Precipitation, Sunshine, Frost and Snow are converted to standard deviations from their own average so they can share an axis with Temperature.
Data: NOAA National Centers for Environmental Information (temperature/precipitation; frost: World Bank CCKP; snow: GPCC (DWD)).
Heatwave Days – Michigan
Warm Spell Duration Index (WSDI) - 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 – Michigan
Data: NOAA National Centers for Environmental Information (temperature/precipitation; frost: World Bank CCKP; snow: GPCC (DWD)).
Monthly Temperature – Michigan
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 – Michigan
NOAA National Centers for Environmental Information (frost: World Bank CCKP; snow: GPCC (DWD)) - Anomalies vs 1901-2000 mean
Shifting Seasons
Warm / cold seasonsKöppen Dfb · ContinentalHow spring and autumn have shifted in Michigan. Spring is defined as the date monthly temperatures first rise above the long-term annual mean (6.4°C, from 1950–1979); autumn is the date they fall back below it. Temperature swings 27.9°C peak-to-peak across the year - a classic four-seasons rhythm.
Baseline vs recent monthly temperature climatology. Biggest warming: Jan (+2.7°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 Michigan
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 Michigan changing?
Michigan 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 Michigan?
Michigan has a continental climate (Köppen Dfb: Humid continental - warm summer), with distinct warm summers and cool-to-cold winters. July is typically the warmest month, averaging 21.0°C, while January is the coldest at -5.4°C. Annual precipitation averages around 899mm, spread fairly evenly across the year.
Where does the climate data for Michigan come from?
Climate data for Michigan 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 Michigan climate data cover?
The Michigan climate profile covers Detroit, Grand Rapids, Warren, Sterling Heights and surrounding areas. Michigan climate data from NOAA Climate at a Glance
How often is the Michigan climate update refreshed?
The Michigan 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 Michigan 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 Michigan 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.