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Arizona Climate Summary July 2017

Summary of conditions for June 2017

June 2017 Temperature and Precipitation Summary

June 1st – 17th: June began with a low pressure system that brought scattered rainfall to northeastern Arizona on the 1st

and 2nd. Totals were less than 0.20” and affected cities includes Canyon de Chelly, Window Rock, Springerville, Alpine,

and St. Johns. Temperatures dropped down to near normal values with the warmest deserts at 101oF, and higher

elevations around 74oF. By the 3rd, high pressure had returned to the southwest. Temperatures rose back to the 106-

108oF range in the deserts and the dry conditions continued through the 6th. On the 7th and 8th, an easterly wave came

through bringing rain showers to the eastern part of the state. Nogales, Elgin, Alpine, Petrified Forest, Safford, St. Johns,

and Springerville all received rainfall, with the greatest rainfall of 0.58” at Alpine. Dry conditions returned and lasted

through the 19th. Temperatures dropped below normal into the upper 90s and lower 100s by the 12th and 13th as a cold

low pressure system moved over California, Nevada and Utah. The high elevations dipped into the lower 20s at night.

There was no moisture associated with the system in Arizona, but it did cool things down before our first heat wave of

the summer.

June 18th – 30th: The heat wave started on the 18th as a very strong high pressure ridge set up over southern Nevada.

The warmest temperature of the heat wave was 126oF at Bullhead City while 120oF was reported at East Mesa and Yuma

on the 20th of June. Phoenix and several cities in the valley had 119 on the 20th and highs ranged from 116 to 118 for 5

days in the southwest deserts. Even with the high pressure during the heat wave, isolated thunderstorms developed due

to the convection, dropping light rain showers over Alpine, Flagstaff and Nogales. All amounts were less than 0.20” and

fell on the 19th, 20th and 21st. Also, lightning from these and other dry thunderstorms sparked numerous wildfires. The

previous several months of dry conditions have made wildfire danger extremely high across the state, but particularly in

central and southern Arizona. High pressure remained in place the rest of the month keeping temperatures warmer than

normal, but the heat wave finally broke down on the 27th. During this time, scattered showers occurred on the 26th

through the 28th, but rainfall amounts were small. Once again the wet locations included Alpine, Springerville, Nogales,

Elgin, Bisbee and Flagstaff.

In This Issue: Overview of June, graphs of the June daily maximum and minimum temperatures, precipitation, mean

daily dew points for Flagstaff, Phoenix, and Tucson; June climate statistics, maps of mean monthly maximum and

minimum temperatures, precipitation, dew points, wind speeds for June; and graphs of the mean June temperature and

precipitation for the period of record for Tucson, Phoenix, and Flagstaff, graphs of the cumulative precipitation for the

calendar year for Flagstaff, Phoenix, and Tucson. Climate calendars for Flagstaff, Phoenix, Tucson, Prescott, Winslow

and Yuma, including daily and monthly normals and extremes, for each month of the year, are not yet updated through

2017. See p.19 of this report for calendar abbreviations. Data are preliminary and are from the National Weather

Service Forecast Offices in Flagstaff, Phoenix and Tucson.

**Note: The discrepancy between the Statewide Temperature and Precipitation values for Phoenix, Flagstaff and

Tucson and the daily values in their graphs are due to the reporting times. Statewide Temperature and Precipitation

values are taken at 5pm, while official daily records at the airports are taken from Midnight to Midnight.

Dr. Nancy J. Selover, State Climatologist

http://azclimate.asu.edu 480-965-6265

Edited by Nancy J. Selover

© 2017 Arizona State Climate Office

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June 2017 Daily Temperature, Precipitation, & Dew Point for Flagstaff, Phoenix, and Tucson

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FLAGSTAFF CLIMATE STATISTICS

June 2017

This June tied for 4th warmest with 2013 and had no

significant ranking for precipitation.

Avg Max Temp (F) 83.6 Normal 77.9

Avg Min Temp (F) 45.4 Normal 41.9

Avg Mean Temp (F) 64.5 Normal 59.9

Departure from Normal (F) -+4.6

Highest Monthly Avg Temp (F) 66.5 in 1974

Lowest Monthly Avg Temp (F) 53.0 in 1965

Highest Temp this month (F): 93 on 23rd

Lowest Temp this month (F): 33 on 14th

Record High (F): 96 on 6/28/2013, 6/26/1970

Record Low (F): 22 on 6/2/1955, 6/2/1951

Temperature or precipitation records this month:

18th HiMax 92 tied, first set in 1940

18th HiMin 54 tied, first set in 1988

23rd HiMax 93 tied, first set in 1974

Flagstaff Number of Days of:

Minimum Temp 50oF or higher 9

Minimum Temp 40oF or lower 9

Maximum Temp 90oF or higher 7

Maximum Temp 75oF or lower 5

Heating Degree Days 75 Normal 170

Cooling Degree Days 68 Normal 17

Degree base 65oF

Total June Precipitation 0.17”

Normal June Precipitation 0.36”

Departure from normal -0.19”

Greatest 24-Hr Precipitation 0.12” on 19th

Total Precipitation Year-to-Date 9.81”

Departure from Normal +1.34”

Total June Snowfall 0.0” Normal 0.0”

Record June Snowfall 0.5” 1907

Number of Days:

Clear 30

Partly Cloudy 0

Cloudy 0

Greatest June Precipitation 2.92” in 1955

Least June Precipitation: 0.00” in 2014, 2012,

and 22 other years

Average Wind Speed 7.7 mph

Highest Peak Gust 50 mph from 240o on 12th

PHOENIX CLIMATE STATISTICS

June 2017

This June was the 2nd warmest and was tied for

driest with 70 other years.

Avg Max Temp(F) 107.9 Normal 103.9

Avg Min Temp(F) 81.4 Normal 77.7

Avg Mean Temp (F) 94.7 Normal 90.8

Departure from Normal (F) +3.9

Highest Monthly Avg Temp (F) 94.8 in 2016, 2013

Lowest Monthly Avg Temp (F) 79.0 in 1965

Highest Temp this month (F) 119 on 20th

Lowest Temp this month (F): 69 on 13th

Record High (F): 122 on 6/26/1990

Record Low (F): 49 on 6/04/1998

Temperature or precipitation records this month:

19th HiMax 118 tied, first set in 2016

20th HiMax 119 set, previous record 116 in 2016

21st HiMax 117 set, previous record 115 in 2008

21st HiMin 90 set, previous record 89 in 2005

22nd HiMin 91 set, previous record 90 in 2005

24th HiMax 116 tied, first set in 1994

25th HiMin 93 set, previous record 90 in 2015

26th HiMin 91 tied, first set in 1990

Phoenix Number of Days of:

Minimum Temp 75oF or lower 4

Minimum Temp 90oF or higher 4

Maximum Temp 100oF or lower 3

Maximum Temp 110oF or higher 11

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Heating Degree Days 0 Normal 0

Cooling Degree Days 899 Normal 774

Degree base 65oF

Total June Precipitation 0.00”

Normal June Precipitation 0.02”

Departure from normal -0.02”

Greatest 24-Hr Precipitation 0.00”

Total Precipitation Year-to-Date 2.41”

Departure from Normal -0.82

Greatest June Precipitation 1.70” in 1972

Least June Precipitation 0.00” in 2014, 2013, 2012,

and 68 other years.

Number of Days:

Clear 20

Partly Cloudy 10

Cloudy 0

Average Wind Speed 7.2 mph

Highest Peak Gust 39 mph from 170o on 11th

TUCSON CLIMATE STATISTICS

June 2017

This June was the warmest on record and had no

significant ranking for precipitation.

Avg Max Temp(F) 105.3 Normal 100.3

Avg Min Temp(F) 74.1 Normal 69.3

Avg Mean Temp(F) 89.7 Normal 84.8

Departure from Normal (F) +4.9

Highest Monthly Avg Temp (F) 89.7 in 2017

Lowest Monthly Avg Temp (F) 77.6 in 1965,1894

Highest Temp this month (F): 116 on 20th

Lowest Temp this month (F): 61 on 14th

Record High (F): 117 on 6/26/1990

Record Low (F): 43 on 6/04/1908

No Temperature or precipitation records this month:

19th HiMax 115 tied, previously set in 2016

20th HiMax 116 set, previous record 112 in 2016

20th HiMin 87 set, previous record 83 in 1940

21st HiMax 115 set, previous record 112 in 1990

22nd HiMin 86 set, previous record 83 in 2005

23rd HiMax 84 set, previous record 113 in 1988

24th HiMax 113 tied, first set in 1994

24th HiMin 83 set, previous record 82 in 2006

25th HiMin 87 set, previous record 83 in 2015

26th HiMin 83 set, previous record 82 in 2002

Tucson Number of Days of:

Minimum Temp 70oF or lower 11

Minimum Temp 80oF or higher 9

Maximum Temp 100oF or lower 5

Maximum Temp 110oF or higher 6

Heating Degree Days 0 Normal 0

Cooling Degree Days 750 Normal 594

Degree base 65oF

Total June Precipitation Trace”

Normal June Precipitation 0.20”

Departure from normal -0.20”

Greatest 24-Hr Precipitation 0.00

Total Precipitation Year-to-Date 1.61”

Departure from Normal -1.66”

Greatest June Precipitation 2.07” in 1938

Least June Precipitation: 0.00” in 2014, 2010, 2002

and 28 other years.

Number of Days:

Clear 26

Partly Cloudy 0

Cloudy 0

Average Wind Speed 7.4 mph

Highest Peak Gust 53 mph from 70o on 20th

Data are from the National Weather Service and the

National Climatic Data Center and are preliminary.

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Wind Speeds for June:

Day Phoenix Flagstaff Tucson

(mph) Avg Max Avg Max Avg Max

1 8.1 26 6.5 32 6.3 28

2 6.3 22 3.1 19 5.9 18

3 6.8 20 2 24 6.3 19

4 8.1 20 7.6 27 6.7 23

5 7.6 22 6.6 30 5.8 28

6 8.1 26 7.2 28 6.1 30

7 7 24 8.5 35 9.6 45

8 5.7 28 9.1 32 9.1 29

9 7 27 13 39 6.9 33

10 6.6 22 15.4 40 7.4 30

11 11 39 18 43 9.3 32

12 8.9 26 19 50 8.5 30

13 5 20 6.1 26 5.4 22

14 5.2 20 5.9 29 5.7 25

15 5.7 19 5.8 27 6.1 22

16 7.1 26 4.9 26 7.4 228

17 6.6 24 7 27 5.8 27

18 6.4 23 4.6 29 7.4 26

19 6 22 5.5 35 7.3 32

20 5.1 21 3.2 30 7.9 31

21 8.6 24 4.7 21 6.8 41

22 8.9 27 7.1 33 8.9 28

23 8.9 26 5.8 26 7.8 28

24 5.8 28 4.9 26 6.3 34

25 9.2 26 6.5 36 10.4 33

26 7.8 26 7.4 31 9.2 32

27 9 25 11.5 45 8.7 30

28 8 25 11.2 40 9.4 29

29 6.6 21 7.2 34 7.5 26

30 5.8 16 4.4 22 6.4 23

Dew Points for June:

Daily Average Dew Point (oF):

Day Phx Tuc Flg

1 42 28 29

2 37 32 27

3 37 35 29

4 38 35 31

5 38 38 30

6 39 37 34

7 32 40 24

8 35 36 29

9 36 25 22

10 36 25 29

11 34 28 28

12 20 22 12

13 19 14 8

14 17 4 4

15 19 10 8

16 24 15 10

17 27 23 21

18 32 23 29

19 37 35 34

20 41 38 33

21 46 48 28

22 50 50 26

23 47 43 25

24 47 47 33

25 49 48 34

26 37 44 28

27 43 46 20

28 38 38 15

29 35 22 19

30 38 26 24

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The

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The minimum temperatures ranged from 23oF at Flagstaff to 69oF at Phoenix Airport. The lowest maximum temperature of 78oF was recorded at Snowslide

Canyon, while the highest maximum temperature was 126oF at Bullhead City. Most locations had no rainfall, while the highest rainfall amount was 1.48” at

Chiricahua National Monument. The lowest average dew point was 24oF at Flagstaff Airport and the highest was 52oF at Parker 2. The highest peak wind

gust was 39 mph at Bonita. Average wind speeds ranged from 3 mph in the Phoenix metro area and Payson to 12 mph at Kingman.

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June 2017

The highest average minimum temperature was 82oF at Glendale Airport and at Falcon Field in Mesa, and the lowest average minimum temperature was 38oF

at Sunrise Mountain. The highest average maximum temperature was 112oF at Bartlett Dam and the lowest average maximum temperature was 71oF at

Snowslide Canyon and Columbine.

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June

June minimum temperatures were 0-4oF warmer than normal across the western half of the state and 2-6oF warmer across eastern Arizona. Daytime

temperatures were also 2-6o F warmer than normal in southern Arizona and 4-8oF warmer than normal in the northern half of the state. Virtually the entire

state received less than 25% of normal rainfall for June. Only Greenlee and eastern Cochise counties had near and above normal rainfall this month.

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Calendar Year 2017

Nighttime temperatures were 1 to 3oF warmer than average across the state with a cooler than normal pocket in western Pima County. Daytime temperatures

were 1 to 3oF warmer than normal across the eastern half of the state. Southern Pima and Cochise County were 2-4oF warmer than normal. There were cool

pockets in southern Navajo, eastern Gila, northwestern Maricopa and western Pinal counties. Northern Arizona, La Paz, western Maricopa and Yuma

counties were slightly wetter than normal while the southeastern counties and southern Mohave County were drier than normal in June.

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2017 Water Year

The 2017 Water Year nighttime temperatures are 2 to 4oF warmer than average across most of the state. Southern Graham, northern Cochise, and western

Pima counties remain 0-2oF cooler than normal. Daytime temperatures were 1 to 4oF warmer than average across the state, and the warmest conditions were

found across the eastern and southeastern parts of the state. The northern 2/3 of Arizona has received over 100% of normal precipitation with a few drier than

normal pockets in southern Mohave and central Apache counties. The southern third of the state has been very dry, receiving less than 70% of normal

precipitation.

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June Mean Temperature Graphs – Flagstaff, Phoenix, and Tucson 1895-2017:

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June Mean Precipitation Graphs – Flagstaff, Phoenix, and Tucson 1895-2017

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2017 Cumulative Precipitation Graphs – Flagstaff, Phoenix and Tucson:

Flagstaff is 1.34” above normal, Tucson is 1.66” below normal, and Phoenix is 0.82” below normal.

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The downloadable normals and extremes calendars use the following abbreviations:

NORM = 30 year (1971-2000) average value (degrees Fahrenheit (F))

OBS = The temperature observation for that day this year

AVG = Average daily temperature

HI MAX = Highest maximum temperature for that day (F)

LO MAX = Lowest maximum temperature for that day (F)

LO MIN = Lowest minimum temperature for that day (F)

HI MIN = Highest minimum temperature for that day (F)

Mx PCP = Maximum precipitation for that day (inches)

Mx SNO = Maximum snowfall for that day (inches)