Climatology 101: 3rd warmest August, 2nd warmest Summer in Tucson

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A little late on posting the August & Summer 2015 climate report for the Old Pueblo. Thank an active Monsoon week for that. Here’s the complete details compiled by the geniuses at NWS Tucson, including a very interesting streak that finally ended Thursday.

Tucsonans experienced yet another hot August with the average temperature of 89.0° being ranked as the 3rd hottest August on record. On the 15th, the airport hit 110° for the first time in August since 2003. This also ranks as the 2nd hottest August high temperature on record. For the 10th time on record all the daily lows 70° or warmer. Temperature extremes for the month ranged from a record high of 110° on the 15th to a low of 72° on the 13th & 25th.. 
Top 5 HOTTEST August’s
Avg. monthly temperature/year
1) 90.2° 1994
2) 89.3° 2011
3) 89.0° 2015
4) 88.7° 2009
5) 88.2° 2012
August 2015 daily high temperature departure from normal August 2015 daily low temperature departure from normal
Click on image above for larger view
As is normally the case during the summer thunderstorm season, rainfall amounts varied widely across the metro area. Using several sources like rainlog.org, the Pima County Regional Flood Control District gages and CoCoRaHS, rainfall amounts for the month ranged from 1″-3.50″ with localized spots up to 5″. The International airport, which is the official recording location for Tucson, recorded 1.80″ which ranks as the 53rd driestAugust on record.
August 2015 stats
Month
Normal
Departure
Average high temperature
101.4°
97.4°
+ 4.0°
Average low temperature
76.6°
73.3°
+ 3.3°
Average temperature
89.0°
85.3°
+ 3.7°
Number of 100° + highs
20
14
+ 6
Rainfall
1.80″
2.39″
– 0.59″ 

Summer 2015 Summer '15 climate recap for Tucson Arizona
2nd hottest on record, tied with 2013
Below normal rainfall
Warmest average low temperature on record
7th straight Summer to be ranked as the Top 10 warmest
83 consecutive days of lows being 70° or warmer Click to enlarge
The forecast for summer 2013, issued by the Climate Prediction Center back in mid-May, called for slightly enhanced probabilities for ABOVE normal temperatures and equal chances of either above normal, normal or below normal rainfall. Hot is was with below normal rainfall.
Summer 2014 was definitely a hot one with the average temperature of 88.3° going into the record books as the 2ND HOTTEST summer on record, tied with 2013. The hottest summer on record was back in 1994. This is the seventh summer to be ranked as the Top 10 warmest. Summer temperature extremes ranged from 110° on June 18th, June 19th and August 15th to a low of 68° on June 4th, 6th & 7th. The summer ended with the airport recording 83 straight days in which the daily low temperature was 70° or warmer.
Summer 2015 daily high temperature departure from normal Summer 2015 daily low temperature departure from normal
Click on image above for larger view
Rainfall amounts across the metro area for the summer season, using several sources like rainlog.org, the Pima County Regional Flood Control District gages and CoCoRaHS, varied widely and ranged from 1.5″-6″ with localized spots up to 7.50″. Officially, the airport recorded 4.44″ which is four-tenths of an inch below normal and goes into the record books as the 60th driest summer on record.
Summer 2015 stats
Season
Normal
Departure
Average high temperature
100.8°
99.1°
+ 1.7°
Average low temperature
75.7°
72.3°
+ 3.4°
Average temperature
88.3°
85.7°
+ 2.6°
Number of 100° + highs
58
51
+ 7
Number of 105° + highs
21
20
+ 1
Rainfall
4.44″
4.84″
– 0.40″
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