The data is collected at 00:00 UTC and 12:00 UTC of each day.
For Tucson, AZ, (UTC -7:00) that corresponds
to 5:00 pm and 5:00 am respectively ...
ignoring daylight savings time.
Surface temperatures
Morning Afternoon
C F C F
02-15 7.8 46.0 26.7 80.1
05-15 18.3 64.9 37.2 99.0
08-14 23.9 75.0 36.7 98.1