#15. Yuma County

- Winter 2024 average temperature: 56.6 degrees Fahrenheit
- Historic average summer temperature: 54.3 degrees
-- 2024 difference from historic average: +2.3 degrees

#14. La Paz County

- Winter 2024 average temperature: 55.3 degrees Fahrenheit
- Historic average summer temperature: 52.8 degrees
-- 2024 difference from historic average: +2.5 degrees

#13. Maricopa County

- Winter 2024 average temperature: 54.2 degrees Fahrenheit
- Historic average summer temperature: 52.4 degrees
-- 2024 difference from historic average: +1.8 degrees

#12. Pima County

- Winter 2024 average temperature: 53.0 degrees Fahrenheit
- Historic average summer temperature: 50.8 degrees
-- 2024 difference from historic average: +2.2 degrees

#11. Pinal County

- Winter 2024 average temperature: 52.8 degrees Fahrenheit
- Historic average summer temperature: 51.0 degrees
-- 2024 difference from historic average: +1.8 degrees

#10. Santa Cruz County

- Winter 2024 average temperature: 47.8 degrees Fahrenheit
- Historic average summer temperature: 45.5 degrees
-- 2024 difference from historic average: +2.3 degrees

#9. Cochise County

- Winter 2024 average temperature: 46.7 degrees Fahrenheit
- Historic average summer temperature: 44.8 degrees
-- 2024 difference from historic average: +1.9 degrees

#8. Mohave County

- Winter 2024 average temperature: 46.6 degrees Fahrenheit
- Historic average summer temperature: 43.9 degrees
-- 2024 difference from historic average: +2.8 degrees

#7. Graham County

- Winter 2024 average temperature: 45.8 degrees Fahrenheit
- Historic average summer temperature: 44.0 degrees
-- 2024 difference from historic average: +1.8 degrees

#6. Yavapai County

- Winter 2024 average temperature: 44.6 degrees Fahrenheit
- Historic average summer temperature: 42.3 degrees
-- 2024 difference from historic average: +2.3 degrees

#5. Gila County

- Winter 2024 average temperature: 44.0 degrees Fahrenheit
- Historic average summer temperature: 42.3 degrees
-- 2024 difference from historic average: +1.7 degrees

#4. Greenlee County

- Winter 2024 average temperature: 41.7 degrees Fahrenheit
- Historic average summer temperature: 39.8 degrees
-- 2024 difference from historic average: +1.9 degrees

#3. Coconino County

- Winter 2024 average temperature: 36.9 degrees Fahrenheit
- Historic average summer temperature: 33.7 degrees
-- 2024 difference from historic average: +3.2 degrees

#2. Navajo County

- Winter 2024 average temperature: 35.3 degrees Fahrenheit
- Historic average summer temperature: 32.5 degrees
-- 2024 difference from historic average: +2.8 degrees

#1. Apache County

- Winter 2024 average temperature: 34.4 degrees Fahrenheit
- Historic average summer temperature: 31.7 degrees
-- 2024 difference from historic average: +2.7 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.