The record high in Phoenix was set--
122 on June 26, 1990;
121 on July 28, 1995;
120 on June 25, 1990;
118 on July 16, 1925,
June
**Average high temperature: 103**
Average low temperature: 72
Warmest ever: 122
Coldest ever: 50
Average precipitation: .1
July
**Average high temperature: 105**
Average low temperature: 80
Warmest ever: 121
Coldest ever: 61
Average precipitation: .8
August
**Average high temperature: 103**
Average low temperature: 79
Warmest ever: 116
Coldest ever: 60
Average precipitation: 1.0
It does get hot here,no doubt about it, however this guy makes it sound like Phoenix is 115-125 on a regular basis. The above dates are RECORDS, extreme heat not the norm. I work out of my trucks, which all pull trailers on a daily basis with all but one with under 100,000mi. Maintain your truck well, change fluids, respect your truck and don't drive like an idiot while towing and you will be fine. I do have larger coolers on my 01 Ford and Dodge but the 6.0 Excursion has never ever had a heat problem even on the hottest of days.
Gary