Here's a list that nobody can dispute because it's from a reputable
publication (Money Magazine / CNN website) not some crank posting from
his basement (Roger Coppock).

Oh--it case anybody wonders--these are SUMMERTIME temperatures not year
round temperatures. In the Northern Hemisphere, it gets hot during the
summer. Blame it on "global warming" caused by the earth tilting on
its axis.

RL

Hottest / Coldest
Here are cities from the Best Places database with the highest average
temperatures in July - 4 also are finalists on the overall list this
year.
Rank City Avg. high temp in July (°F)
1 Avondale, AZ 107.6°F
1 Glendale, AZ 107.6°F
1 Peoria, AZ 107.6°F
1 Surprise, AZ 107.6°F
5 Lake Havasu City, AZ 107.5°F
5 Las Vegas, NV 107.5°F
5 North Las Vegas, NV 107.5°F
5 Sunrise Manor, NV 107.5°F
9 Yuma, AZ 107.3°F
10 Chandler, AZ 105.7°F
10 Gilbert, AZ 105.7°F
10 Mesa, AZ 105.7°F
13 Scottsdale, AZ 105.2°F
14 Phoenix, AZ 104.2°F
15 Henderson, NV 104.1°F
15 Paradise, NV 104.1°F
15 Spring Valley, NV 104.1°F
18 Tempe, AZ 103.6°F
19 Casas Adobes, AZ 100.7°F
19 Catalina Foothills, AZ 100.7°F
21 Tucson, AZ 100.5°F
22 Apple Valley, CA 99.1°F
22 Hesperia, CA 99.1°F
22 Victorville, CA 99.1°F
25 Redding, CA 98.5°F

Only cities within 50 miles of a weather station considered.
Source: NOAA National Weather Center observ