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Comparative Climate
 
Arizona
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  Pan Evaporation
 

Standard daily pan evaporation is measured using the four-foot diameter Class A evaporation pan. The pan water level reading is adjusted when precipitation is measure to obtain the actual evaporation. Most Class A pans are installed aboveground, allowing effects such as radiation on the side walls and heat exchnges with the pan material. These effects tend to increase the evaporation totals. The amounts can then be adjusted by multiplying the totals b 0.70 or 0.80 to more closely estimate the evaporation from naturally existing urfaces such as a shallow lake, wet soil or other moist natural surfaces.

Many stations do not measure pan evaportation during winter months. A "0.00" total indicates no measuement is taken.

Stations marked with an asterisk * have estimated totals computed from meteorological measurements using a form of the Penman equation.

 
period of record
jan
feb
mar
apr
may
jun
july
aug
sept
oct
nov
dec
year
Bartlett Dam
1939-2002
3.92 4.92 7.10 10.02 13.77 16.21 15.56 13.95 12.10 9.66 5.86 4.47 117.54
Davis Dam # 2
1958-1977
7.49 7.46 9.75 12.78 16.71 19.48 19.87 17.91 14.64 12.03 8.40 7.80 154.32
Davis Dam
1948-1961
3.54 5.13 7.60 9.30 11.33 13.33 13.14 12.15 9.51 7.24 5.38 3.88 101.53
Flagstaff WB Airport *
  2.00 2.00 3.00 5.00 7.00 9.00 8.00 6.00 5.00 4.00 2.50 1.70 54.00
Grand Canyon N P 2
1976-2002
M M M M 7.46 9.80 8.94 7.29 6.10 4.45 M M 44.04
Hawley Lake
1967-1988
M M M M 7.57 8.55 6.89 5.48 4.68 M M M 33.17
Mesa Exp Farm
1896-2002
3.03 4.02 6.11 8.64 11.33 12.67 13.10 11.87 9.69 6.81 4.15 2.96 94.38
Nogales 6 N
1952-2002
3.59 4.46 7.01 9.35 11.91 13.31 10.00 8.28 8.06 7.17 4.49 3.57 91.20
Page
1957-2002
M 2.60 5.84 8.27 10.72 12.86 13.06 11.38 8.42 5.13 2.29 M 80.57
Phoenix Airport *
  3.60 4.40 7.00 10.00 13.30 14.80 14.60 12.70 10.50 7.80 4.80 3.50 106.90
Roosevelt 1 WNW
1905-2002
2.45 3.56 5.91 8.66 11.99 14.58 14.39 12.29 10.07 6.79 3.70 2.32 96.71
Safford Agricultural Ctr
1948-2002
2.65 3.97 7.24 10.62 13.80 15.45 13.09 10.79 8.75 5.86 3.35 2.48 98.05
San Carlos Reservoir
1948-2002
2.26 3.32 5.71 8.41 11.70 13.97 13.43 11.42 9.20 6.30 3.55 2.18 91.45
Tucson Airport *
  4.60 5.20 7.70 10.90 13.80 15.20 13.10 11.50 10.70 8.70 5.70 4.40 111.45
Tucson Univ of Arizona
1894-2002
3.25 4.57 6.95 9.88 12.87 14.91 13.17 11.65 10.35 7.81 4.73 3.37 103.51
Tucson Univ of Arizona #1
1982-2002
3.94 4.68 7.53 10.57 14.14 16.51 14.61 12.17 10.71 8.05 4.93 3.23 111.07
Wahweap
1961-2002
1.95 2.77 6.30 9.42 12.82 14.94 15.26 13.31 10.06 7.06 3.69 2.60 100.18
Whiteriver
1900-2002
1.69 2.94 5.84 8.01 9.92 11.70 9.48 8.47 7.68 5.87 3.51 2.54 77.65
Winslow Aiport *
  2.00 3.10 5.50 8.10 10.90 13.10 11.90 10.10 8.70 6.10 3.40 1.90 84.70
Yuma Citrus Station
1920-2002
3.58 4.36 6.81 9.17 11.75 13.19 13.85 12.28 9.51 6.91 4.43 3.37 99.21
Yuma Airport *
  5.20 5.70 8.50 11.40 14.30 15.60 15.90 14.30 11.90 8.90 5.90 4.80 122.50
 
   State Extremes
 
* Also at earlier dates at the same time or other places
 
 
date or year
location
value
Record Highest Temp
29-Jun-94
Lake Havasu City
128.00
Record Lowest Temp
7-Jan-71
Hawley Lake
-40.00
Highest Average Annual Temp
  
Lake Havasu City
76.30
Lowest Average Annual Temp
  
Sunrise Mountain
38.30
Consecutive Days Max >= 70
Apr-Oct 1992
Yuma WSO AP
184 days
Consecutive Days Min <= 32
Oct 76-May 77
Fort Valley
241 days
       
Record Maximum Annual Precip
1978
Hawley Lake
58.92
Record Minimum Annual Precip
1956
Davis Dam
0.07
Record Maximum 24-hour Precip
4-5 Sep 1970
Workman Creek
11.40
Highest Average Annual Precip
  
Hawley Lake
38.18
Lowest Average Annual Precip
  
Lake Havasu City
2.67
Consecutive Days Measurable Precip
Jul-Aug 1983
Greer
31 days
Consecutive Days with no Measurable Precip
Feb 1901-Jan 1902
Sentinel
352 days
       
Record Maximum Winter Snowfall
1972-73
Sunrise Mountain
400.90
Record Maximum 1-Day Snowfall
14-Dec-67
Heber Ranger Stn
38.00
Highest Average Annual Snowfall
  
Sunrise Mountain
243.00
       
 
  Precipitation
(mean monthly & annual number of hrs with measurable precip with % of hrs and maximum 1-hr totals)
 

* = Less than 1/2 hour

Maximum 1-hour totals are based on data from top of the hour. Maximum 60-minute totals will be greater.
 
period of record
jan
feb
mar
apr
may
jun
july
aug
sept
oct
nov
dec
year
hour
inches
Flagstaff
1950-1999
56
51
58
35
17
8
29
34
25
26
35
49
422
5
2.25
Phoenix
1954-1999
19
16
17
5
3
2
9
11
8
10
11
19
130
2
1.35
Tucson
1948-1999
20
17
18
7
4
4
26
23
14
13
13
22
181
2
2.22
Winslow
1949-1999
15
16
15
9
8
5
18
21
17
15
13
20
172
2
2.09
Yuma
1951-1995
10
7
7
3
1
*
2
5
3
4
4
9
56
1
1.98
 
  Sunshine Days
(mean monthly & annual % of possible sunshine)
 

Only the first order stations record possible sunshine.

For more information click here on Western States, Alaska or Hawaii and Pacific Islands
 
jan
feb
mar
apr
may
jun
july
aug
sept
oct
nov
dec
annual
Flagstaff
77
73
76
82
88
86
75
76
81
79
75
73
78
Phoenix
78
80
84
89
93
94
85
85
89
88
83
77
85
Tucson
80
82
86
90
92
93
78
80
87
88
84
79
85
Yuma
84
87
90
94
95
97
91
91
93
92
87
82
90