As Heat Wave Blankets the Northeast, These Cities Will See the Largest Temperature Anomalies

By Evan Comen • June 22, 2025

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An unusual jet stream pattern is pushing extreme heat into unexpected corners of the U.S. this week, sending temperatures soaring well above seasonal norms across the Northeast and Great Lakes.

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While early-season heat waves are becoming more common, the incoming heat dome could bring dangerous, triple-digit temperatures to some cities for the first time in recorded history. In cities like Worcester, Massachusetts, and Providence, Rhode Island, daily highs are forecast to climb more than 20°F above the historical average.

This dramatic warming is the result of a stalled high-pressure system centered over the eastern U.S. that is allowing hot, stagnant air to settle over densely populated regions from Michigan to Connecticut. Cities accustomed to mild early-summer weather are now facing triple-digit highs, putting stress on power grids, public health systems, and infrastructure built for cooler conditions. A closer look at the data reveals the cities that will experience the greatest temperature anomalies this week.

To determine the cities where it will be abnormally hot this week, Climate Crisis 247 reviewed 72-hour temperature forecasts and historical station-level daily temperature readings from the NOAA. Cities were ranked based on the difference between the forecast minimum temperature for June 23-26, 2025, and the average observed minimum temperature for June 23-26 from 2006 to 2020. Gridded forecast data are from the National Digital Forecast Database, while historical temperature normals are from the Global Historical Climatology Network daily program of the National Centers for Environmental Information. Weather stations were matched to places using nearest neighbor analysis and were limited to cities within 50 miles of the city centroid. Only cities with at least 100,000 residents were considered.

25. New York, NY

Photo by Axel Houmadi on Unsplash

Forecast high, June 23: 95.6°F (+13.7°F above normal)
Forecast high, June 24: 88.5°F (+6.3°F above normal)
Forecast high, June 25: 95.6°F (+13.1°F above normal)
Forecast high, June 26: 95.6°F (+12.9°F above normal)
Total population: 8,622,467

24. Warren, MI

Photo by Snapwire on Pexels

Forecast high, June 23: 94.9°F (+13.8°F above normal)
Forecast high, June 24: 90.9°F (+9.6°F above normal)
Forecast high, June 25: 94.9°F (+13.4°F above normal)
Forecast high, June 26: 94.9°F (+13.2°F above normal)
Total population: 138,588

23. Pittsburgh, PA

Photo by Tyler Rutherford on Unsplash

Forecast high, June 23: 95.1°F (+14.3°F above normal)
Forecast high, June 24: 93.4°F (+12.4°F above normal)
Forecast high, June 25: 95.1°F (+13.9°F above normal)
Forecast high, June 26: 95.1°F (+13.7°F above normal)
Total population: 303,843

22. Jersey City, NJ

Photo by Manoj Kulkarni on Unsplash

Forecast high, June 23: 98.2°F (+14.3°F above normal)
Forecast high, June 24: 91.8°F (+7.6°F above normal)
Forecast high, June 25: 98.2°F (+13.7°F above normal)
Forecast high, June 26: 98.2°F (+13.4°F above normal)
Total population: 287,899

21. Stamford, CT

Photo by David Kanigan on Pexels

Forecast high, June 23: 96.5°F (+14.3°F above normal)
Forecast high, June 24: 89.5°F (+7.0°F above normal)
Forecast high, June 25: 96.5°F (+13.7°F above normal)
Forecast high, June 26: 96.5°F (+13.4°F above normal)
Total population: 135,413

20. New Bedford, MA

Photo by David Trinks on Unsplash

Forecast high, June 23: 93.7°F (+15.2°F above normal)
Forecast high, June 24: 83.1°F (+4.3°F above normal)
Forecast high, June 25: 93.7°F (+14.6°F above normal)
Forecast high, June 26: 93.7°F (+14.3°F above normal)
Total population: 100,620

19. Syracuse, NY

Photo by Joshua Hummell on Unsplash

Forecast high, June 23: 94.7°F (+16.1°F above normal)
Forecast high, June 24: 89.9°F (+11.0°F above normal)
Forecast high, June 25: 94.7°F (+15.6°F above normal)
Forecast high, June 26: 94.7°F (+15.3°F above normal)
Total population: 146,134

18. Elizabeth, NJ

Photo by Greg Martinez on Pexels

Forecast high, June 23: 100.8°F (+16.5°F above normal)
Forecast high, June 24: 93.6°F (+9.0°F above normal)
Forecast high, June 25: 100.8°F (+15.9°F above normal)
Forecast high, June 26: 100.8°F (+15.6°F above normal)
Total population: 135,665

17. Newark, NJ

Photo by Jimmy Woo on Unsplash

Forecast high, June 23: 100.4°F (+16.5°F above normal)
Forecast high, June 24: 93.9°F (+9.7°F above normal)
Forecast high, June 25: 100.4°F (+15.9°F above normal)
Forecast high, June 26: 100.4°F (+15.6°F above normal)
Total population: 307,355

16. Yonkers, NY

Photo by Atlas Obscura on Unsplash

Forecast high, June 23: 100.2°F (+16.6°F above normal)
Forecast high, June 24: 93.7°F (+9.8°F above normal)
Forecast high, June 25: 100.2°F (+16.0°F above normal)
Forecast high, June 26: 100.2°F (+15.7°F above normal)
Total population: 209,780

15. Boston, MA

Photo by todd kent on Unsplash

Forecast high, June 23: 95.2°F (+16.7°F above normal)
Forecast high, June 24: 79.6°F (+0.8°F above normal)
Forecast high, June 25: 95.2°F (+16.0°F above normal)
Forecast high, June 26: 95.2°F (+15.7°F above normal)
Total population: 665,945

14. Bridgeport, CT

Photo by Bill Burke on Unsplash

Forecast high, June 23: 97.4°F (+17.0°F above normal)
Forecast high, June 24: 89.6°F (+8.9°F above normal)
Forecast high, June 25: 97.4°F (+16.4°F above normal)
Forecast high, June 26: 97.4°F (+16.1°F above normal)
Total population: 148,470

13. New Haven, CT

Photo by Richard Liu on Unsplash

Forecast high, June 23: 97.5°F (+18.0°F above normal)
Forecast high, June 24: 90.0°F (+10.2°F above normal)
Forecast high, June 25: 97.5°F (+17.4°F above normal)
Forecast high, June 26: 97.5°F (+17.1°F above normal)
Total population: 135,736

12. Paterson, NJ

Photo by Robert Thiemann on Unsplash

Forecast high, June 23: 101.0°F (+18.1°F above normal)
Forecast high, June 24: 96.0°F (+12.9°F above normal)
Forecast high, June 25: 101.0°F (+17.6°F above normal)
Forecast high, June 26: 101.0°F (+17.3°F above normal)
Total population: 157,864

11. Lynn, MA

Photo by sundesh kami on Unsplash

Forecast high, June 23: 94.5°F (+18.3°F above normal)
Forecast high, June 24: 79.3°F (+2.8°F above normal)
Forecast high, June 25: 94.5°F (+17.6°F above normal)
Forecast high, June 26: 94.5°F (+17.3°F above normal)
Total population: 100,653

10. Quincy, MA

Photo by Andrew Heald on Unsplash

Forecast high, June 23: 96.8°F (+18.3°F above normal)
Forecast high, June 24: 80.7°F (+1.9°F above normal)
Forecast high, June 25: 96.8°F (+17.6°F above normal)
Forecast high, June 26: 96.8°F (+17.3°F above normal)
Total population: 100,981

9. Springfield, MA

Photo by Tyson Moultrie on Unsplash

Forecast high, June 23: 100.1°F (+18.5°F above normal)
Forecast high, June 24: 92.9°F (+11.0°F above normal)
Forecast high, June 25: 100.1°F (+17.9°F above normal)
Forecast high, June 26: 100.1°F (+17.5°F above normal)
Total population: 155,305

8. Waterbury, CT

Photo by Jeff Caron-Robert on Unsplash

Forecast high, June 23: 99.8°F (+19.0°F above normal)
Forecast high, June 24: 93.4°F (+12.3°F above normal)
Forecast high, June 25: 99.8°F (+18.4°F above normal)
Forecast high, June 26: 99.8°F (+18.1°F above normal)
Total population: 114,480

7. Manchester, NH

Photo by Pixabay on Pexels

Forecast high, June 23: 99.8°F (+19.1°F above normal)
Forecast high, June 24: 87.2°F (+6.2°F above normal)
Forecast high, June 25: 99.8°F (+18.5°F above normal)
Forecast high, June 26: 99.8°F (+18.2°F above normal)
Total population: 115,037

6. Cambridge, MA

Photo by Bernd 📷 Dittrich on Unsplash

Forecast high, June 23: 100.3°F (+19.2°F above normal)
Forecast high, June 24: 84.3°F (+2.8°F above normal)
Forecast high, June 25: 100.3°F (+18.4°F above normal)
Forecast high, June 26: 100.3°F (+18.1°F above normal)
Total population: 117,962

5. Lowell, MA

Photo by Roddy Trull on Pexels

Forecast high, June 23: 100.8°F (+19.7°F above normal)
Forecast high, June 24: 86.6°F (+5.1°F above normal)
Forecast high, June 25: 100.8°F (+19.0°F above normal)
Forecast high, June 26: 100.8°F (+18.6°F above normal)
Total population: 114,737

4. Hartford, CT

Photo by Balazs Busznyak on Unsplash

Forecast high, June 23: 101.8°F (+19.9°F above normal)
Forecast high, June 24: 94.8°F (+12.6°F above normal)
Forecast high, June 25: 101.8°F (+19.3°F above normal)
Forecast high, June 26: 101.8°F (+19.0°F above normal)
Total population: 121,057

3. Brockton, MA

Photo by John Fay on Unsplash

Forecast high, June 23: 100.4°F (+20.4°F above normal)
Forecast high, June 24: 85.0°F (+4.7°F above normal)
Forecast high, June 25: 100.4°F (+19.8°F above normal)
Forecast high, June 26: 100.4°F (+19.5°F above normal)
Total population: 104,713

2. Providence, RI

Photo by Justin Case on Unsplash

Forecast high, June 23: 100.2°F (+20.5°F above normal)
Forecast high, June 24: 90.1°F (+10.1°F above normal)
Forecast high, June 25: 100.2°F (+19.9°F above normal)
Forecast high, June 26: 100.2°F (+19.6°F above normal)
Total population: 189,715

1. Worcester, MA

Photo by Cloris Ying on Unsplash

Forecast high, June 23: 99.0°F (+22.5°F above normal)
Forecast high, June 24: 88.9°F (+12.1°F above normal)
Forecast high, June 25: 99.0°F (+21.9°F above normal)
Forecast high, June 26: 99.0°F (+21.6°F above normal)
Total population: 204,191

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