Arizona Climate Summary July 2015 Summary of conditions for June 2015

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1 June 2015 Temperature and Precipitation Summary Arizona Climate Summary July 2015 Summary of conditions for June 2015 June 1 st 14 th : Similar to May, June began with high pressure in the west, and conditions remained dry through the first 4 days of the month. Temperatures were slightly cooler than normal with the warmest areas in the low 100s. By the 5 th, a trough of low pressure moved into the southwest bringing moisture from the eastern Pacific producing thunderstorms across central, eastern and northern Arizona. The southern and western borders remained dry. Rainfall totals for the 5 th and 6 th included 1.06 at Flagstaff, 0.66 at Page, 0.34 at Scottsdale, 0.86 at Window Rock, 0.33 at the north rim of the Grand Canyon, 0.76 at Navajo National Monument, 0.84 at Payson, 0.67 at Petrified Forest, 0.43 at Show Low, 0.19 at Phoenix, and 0.10 at Williams. The 7 th remained dry, but the low became cut-off and continued to hang around the southwest bringing moisture and rainfall to various parts of the state from the 8 th through the 14 th. Grand Canyon Airport had 1.51, Kingman had 1.07, Nogales had 0.54, Page had 0.64, Winslow had 0.48, Yuma had 0.31, Bisbee had 0.34, Grand Canyon North Rim had 1.90, Navajo National Monument had 1.03, and Petrified Forest had Temperatures remained below normal most of this time. June 15 th 30 th : High pressure returned to western Arizona by the 15 th, though the low pressure system over Texas continued to push moisture into the eastern part of the state, with scattered shower activity through the 18 th. Temperatures in the south central and southwest deserts were slightly warmer than normal in the 112 to 117 o F range. High pressure finally returned to the southwest deserts by the 19 th, but the clear skies were accompanied by cooler air, leaving temperatures below normal statewide. By the 23 rd the moisture returned to the southern border as the high moved over the Texas-New Mexico border. Rain fell across southern Arizona from the 23 rd through the 26 th, and light showers spread into northern Arizona from the 27 th through the end of the month. Totals included 1.01 at Bisbee- Douglas AP, 0.49 at Davis Monthan AFB, 0.56 at Flagstaff, 0.50 at Nogales, 0.67 at Prescott, 0.37 at Safford, 0.41 at St. Johns, 0.26 at Tucson AP, 0.82 at Bisbee, 2.51 at Coronado NM, and 1.30 at Show Low. Temperatures along the lower Colorado River, which remained dry, remained above 110 o F through the end of the month. 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. 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, can be downloaded directly from the State Climate website. See p.18 of this report for calendar abbreviations. Notice*** The National Climatic Data Center (NCDC) has changed its name to the National Center for Environmental Information (NCEI). The new website was unveiled April 21 st, There are some organizational changes at NOAA, associated with this change, but the mission of providing climate data will continue. Dr. Nancy J. Selover, State Climatologist Edited by Nancy J. Selover 2015 Arizona State Climate Office 1

2 June 2015 Daily Temperature, Precipitation, & Dew Point for Flagstaff, Phoenix, and Tucson 2

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4 FLAGSTAFF CLIMATE STATISTICS June 2015 This June was the 13 th warmest and the 8 th wettest June on record. Avg Max Temp (F) 79.7 Normal 77.9 Avg Min Temp (F) 46.2 Normal 41.9 Avg Mean Temp (F) 62.9 Normal 59.9 Departure from Normal (F) +3.0 Highest Monthly Avg Temp (F) 66.5 in 1974 Lowest Monthly Avg Temp (F) 53.0 in 1965 Highest Temp this month (F): 92 on 26 th Lowest Temp this month (F): 30 on 4 th Record High (F): 96 on 6/28/2013, 6/26/1970 Record Low (F): 22 on 5/02/1955, 6/02/1951 Temperature or precipitation records this month: 9 th HiMin 55 set, previous record 53 in th Precip 1.00 set, previous record 0.40 in 1903 Flagstaff Number of Days of: Minimum Temp 50 o F or higher 12 Minimum Temp 40 o F or lower 6 Maximum Temp 85 o F or higher 13 Maximum Temp 70 o F or lower 4 Heating Degree Days 105 Normal 170 Cooling Degree Days 50 Normal 17 Degree base 65 o F Total June Precipitation 1.70 Normal June Precipitation 0.36 Departure from normal Greatest 24-Hr Precipitation 1.07 on 5 th -6 th Total Precipitation Year-to-Date Departure from Normal Number of Days: Clear 24 Partly Cloudy 5 Cloudy 1 Greatest June Precipitation 2.92 in 1955 Least June Precipitation 0.00 in 2014, 2012, 2011 and 21 other years. Average Wind Speed Highest Peak Gust 5.9 mph 43 mph from 210 o on 3 rd PHOENIX CLIMATE STATISTICS June 2015 This June was the 3 rd warmest and the 10th wettest June on record. Avg Max Temp(F) Normal Avg Min Temp(F) 82.1 Normal 77.7 Avg Mean Temp (F) 94.0 Normal 90.8 Departure from Normal (F) +3.2 Highest Monthly Avg Temp (F) 94.8 in 2013 Lowest Monthly Avg Temp (F) 79.0 in 1965 Highest Temp this month (F): Lowest Temp this month (F): Record High (F): 122 on 6/26/1990 Record Low (F): 49 on 6/04/ on 18 th 71 on 7 th Temperature or precipitation records this month: 5 th HiPCP 0.16 set, previous record 0.00 in th HiPCP 0.03 set, previous record 0.01 in th HiMin 83 tied, first set in th HiMin 86 set, previous record 85 in th HiMax 114 set, previous record 113 in th HiMax 115 tied, first set in th HiMin 90 set, previous record 89 in 2006 Phoenix Number of Days of: Minimum Temp 80 o F or lower 12 Minimum Temp 90 o F or higher 2 Maximum Temp 100 o F or lower 7 Maximum Temp 110 o F or higher 11 4

5 Heating Degree Days 0 Normal 0 Cooling Degree Days 876 Normal 774 Degree base 65 o F Total June Precipitation 0.25 Normal June Precipitation 0.02 Departure from normal Greatest 24-Hr Precipitation th -6 th Total Precipitation Year-to-Date 2.75 Departure from Normal Number of Days: Clear 15 Partly Cloudy 12 Cloudy 1 Greatest June Precipitation 1.70 in 1972 Least June Precipitation 0.00 in 2014, 2013, 2012, and 67 other years Average Wind Speed 7.7 mph Highest Peak Gust 51 mph from 80 o on 27 th TUCSON CLIMATE STATISTICS June 2015 This June was the 4 th warmest and was tied with 1920 as the 14 th wettest June on record. Avg Max Temp(F) Normal Avg Min Temp(F) 74.2 Normal 69.3 Avg Mean Temp(F) 88.6 Normal 84.8 Departure from Normal (F) +3.8 Highest Monthly Avg Temp (F) 89.4 in 2013 Lowest Monthly Avg Temp (F) 77.6 in 1965 &1894 Highest Temp this month (F): Lowest Temp this month (F): Record High (F): 117 on 6/26/1990 Record Low (F): 43 on 6/04/ on 18 th, 19 th 68 on 4 th, 6 th, 7 th Temperature or precipitation records this month 17 th HiMax 109 tied, first set in st HiMin 83 set, previous record 82 in rd HiMin 80 tied, first set in th HiMin 83 set, previous record 81 in 1970 Tucson Number of Days of: Minimum Temp 70 o F or lower 8 Minimum Temp 80 o F or higher 4 Maximum Temp 90 o F or lower 1 Maximum Temp 110 o F or higher 2 Heating Degree Days 0 Normal 0 Cooling Degree Days 713 Normal 594 Degree base 65 o F Total June Precipitation 0.56 Normal June Precipitation 0.20 Departure from normal Greatest 24-Hr Precipitation 0.26 on th Total Precipitation Year-to-Date 4.26 Departure from Normal Greatest June Precipitation 2.07 in 1938 Least June Precipitation 0.00 in 2014, 2010, 2002, and 27 other years Number of Days: Clear 28 Partly Cloudy 2 Cloudy 0 Average Wind Speed Highest Peak Gust 7.7 mph 59 mph from 70 o on 25 th Data are from the National Weather Service and the National Climatic Data Center and are preliminary. 5

6 Wind Speeds for May: Day Phoenix Flagstaff Tucson (mph) Avg Max Avg Max Avg Max Dew Points for May: Daily Average Dew Point ( o F): Day Phx Tuc Flg

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10 June minimum temperatures were generally 2 to 6 o F warmer than average across most of the state. Much of Graham and Greenlee counties were 6 to 8 o F warmer than normal. Daytime temperatures were more varied with warmer than normal conditions across most of the state and cooler than normal conditions in pockets of Pinal, western Maricopa, southern Mohave and Navajo counties, and northern Navajo and Apache counties. June precipitation was unusual, much like May, with wetter than normal conditions including 400 to 1200% of normal in many areas. However, in many cases this amounted to an inch or less for the month as June is typically a relatively dry month. 10

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12 Calendar Year 2015 Calendar year minimum temperatures have been generally 0 to 3 o F warmer than average, with the warmest conditions in Gila County, and cooler than normal conditions in Graham County. Daytime temperatures have been 1 to 3 o F warmer than average across the northwest half of the state, and slightly warmer than average in the southeast. Exceptions are cooler than normal areas in western Maricopa and Pinal counties, and central Apache, southern Gila, and northwest Graham County. Precipitation continues to be highly variable across the state, but most areas are within 70% of normal while the Colorado Plateau is above 150% of normal. 12

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14 2015 Water Year The water year minimum temperatures are 0-4 o F warmer than average statewide, with Gila County as much as 6 o F warmer than normal. Graham County is slightly cooler than average. Daytime temperatures have been 1-4 o F warmer than average across northern Arizona, with southern Arizona within 2 o F of normal, and cool pockets in western Pinal County and along the Gila-Graham County boundary. Precipitation has been well below average along much of the Mogollon Rim, northwestern Coconino County, Mohave County and northern Maricopa County. The Colorado plateau and parts of southern Arizona have received between 130 and 175% of normal precipitation. 14

15 June Mean Temperature Graphs Flagstaff, Phoenix, and Tucson : 15

16 June Mean Precipitation Graphs Flagstaff, Phoenix, and Tucson : 16

17 2015 Cumulative Precipitation Graphs Flagstaff, Phoenix and Tucson: Flagstaff is about 4 wetter than normal, Tucson is about 1 wetter than normal and Phoenix is 0.48 drier than normal. 17

18 The downloadable normals and extremes calendars use the following abbreviations: NORM = 30 year ( ) 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) 18