#10. Rockingham County

- Winter 2024 average temperature: 31.9 degrees Fahrenheit
- Historic average summer temperature: 24.2 degrees
-- 2024 difference from historic average: +7.6 degrees

#9. Hillsborough County

- Winter 2024 average temperature: 31.5 degrees Fahrenheit
- Historic average summer temperature: 22.8 degrees
-- 2024 difference from historic average: +8.7 degrees

#8. Cheshire County

- Winter 2024 average temperature: 30.1 degrees Fahrenheit
- Historic average summer temperature: 21.2 degrees
-- 2024 difference from historic average: +8.9 degrees

#5. Belknap County (tie)

- Winter 2024 average temperature: 30.0 degrees Fahrenheit
- Historic average summer temperature: 20.9 degrees
-- 2024 difference from historic average: +9.1 degrees

#5. Merrimack County (tie)

- Winter 2024 average temperature: 30.0 degrees Fahrenheit
- Historic average summer temperature: 21.2 degrees
-- 2024 difference from historic average: +8.8 degrees

#5. Strafford County (tie)

- Winter 2024 average temperature: 30.0 degrees Fahrenheit
- Historic average summer temperature: 22.8 degrees
-- 2024 difference from historic average: +7.2 degrees

#4. Sullivan County

- Winter 2024 average temperature: 28.7 degrees Fahrenheit
- Historic average summer temperature: 19.4 degrees
-- 2024 difference from historic average: +9.4 degrees

#3. Carroll County

- Winter 2024 average temperature: 28.0 degrees Fahrenheit
- Historic average summer temperature: 19.0 degrees
-- 2024 difference from historic average: +9 degrees

#2. Grafton County

- Winter 2024 average temperature: 26.9 degrees Fahrenheit
- Historic average summer temperature: 17.2 degrees
-- 2024 difference from historic average: +9.7 degrees

#1. Coos County

- Winter 2024 average temperature: 23.7 degrees Fahrenheit
- Historic average summer temperature: 14.0 degrees
-- 2024 difference from historic average: +9.7 degrees

This story features data reporting by Wade Zhou, writing by Andrea Vale, and is part of a series utilizing data automation across 48 states.