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Comparative Climate
 
California
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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
Auburn Dam Project
1972-1984
1.42
1.89
3.13
4.89
7.73
10.08
11.66
10.70
8.08
5.00
1.97
1.36
67.91
Bakersfield Airport *
 
2.00
2.60
4.70
6.70
9.70
12.30
13.50
12.10
9.10
6.20
3.20
1.80
83.70
Beaumont Pumping Plant
1948-1975
2.90
3.29
4.08
5.03
6.40
8.15
10.64
9.97
7.90
5.87
3.22
2.90
70.35
Berryessa Lake
1957-1970
1.53
2.15
3.79
5.82
8.90
11.00
13.22
12.06
8.67
5.72
2.48
1.66
77.00
Boca
1948-2002
M
M
M
M
6.83
8.55
10.01
9.11
6.51
4.32
M
M
45.33
Brannan Island
1968-1977
1.15
1.74
4.36
7.03
10.49
12.39
13.51
12.02
9.03
4.80
1.83
1.08
79.43
Burbank Valley Pump Pl *
  
3.50
3.60
4.80
5.70
6.30
7.30
9.20
8.30
7.10
5.40
4.00
3.60
68.80
Bulringame
1948-1978
1.27
1.81
3.60
5.28
6.85
7.82
8.42
7.39
5.74
3.78
1.98
1.28
55.22
Butler Valley Ranch
1970-1975
0.42
0.63
1.44
2.87
4.54
5.38
7.00
6.18
4.12
1.58
0.56
0.46
35.18
Cachuma Lake
1952-2002
2.77
3.57
4.42
5.99
7.52
8.55
9.48
8.97
7.00
5.42
3.49
2.79
69.97
Chico Exp Stn
1906-2002
1.26
2.14
3.82
5.63
8.28
10.11
11.50
9.70
7.36
4.46
2.09
1.30
67.65
Davis 1 WSW
1917-2002
1.49
2.34
4.51
7.09
10.16
12.20
12.80
11.29
9.07
6.37
2.89
1.45
81.66
Death Valley
1961-2002
3.97
5.42
9.07
13.00
16.68
19.03
20.95
18.87
14.06
9.76
5.57
3.72
140.10
Duttons Landing
1955-1977
1.42
2.09
3.87
5.70
7.74
9.34
9.34
8.27
6.75
4.65
2.25
1.46
62.88
Ferndale 2 NW
1963-1973
0.70
1.17
2.26
3.21
3.95
4.38
4.49
4.07
3.59
2.06
1.04
0.72
31.64
Folsom Dam
1955-1993
0.92
1.90
3.47
5.21
8.07
9.91
11.12
9.93
7.45
4.89
2.06
1.25
66.18
Fresno Airport *
 
1.30
2.10
4.20
6.30
9.30
11.40
12.40
10.70
7.90
5.00
2.30
1.20
74.10
Friant Government Camp
1948-2002
1.45
2.12
3.80
5.86
9.41
12.07
13.95
12.46
8.98
5.77
2.62
1.38
79.87
Grizzly Island Refuge
1971-1977
1.45
2.25
4.00
5.72
8.07
9.82
10.69
8.93
6.88
4.33
2.10
1.55
65.79
Indio U S Date Garden
1927-2002
2.85
4.38
7.15
9.98
12.73
14.85
14.95
13.59
10.80
7.60
3.98
2.49
105.35
Kettleman City 1 SSW
1955-2002
1.73
2.99
5.80
8.32
11.75
14.27
16.11
14.74
10.82
7.30
3.46
1.74
99.03
Knights Ferry 2 ESE
1959-1977
1.00
1.69
3.14
5.65
8.54
10.14
11.60
10.31
7.74
4.62
2.69
1.00
68.12
Lake Pillsbury 2
1964-1970
0.58
1.42
3.01
4.62
7.41
8.38
10.31
9.35
6.93
3.61
1.19
0.87
57.68
Lake Solano
1975-2002
1.50
2.38
4.25
6.57
9.18
11.19
11.45
9.85
7.59
5.29
2.59
1.66
73.50
Lake Spaulding Dam
1955-1971
M
M
M
M
7.20
9.98
12.38
11.85
8.94
6.64
M
M
56.99
Little Panoche Det Dam
1968-1975
1.77
2.89
5.87
9.39
14.56
16.31
18.45
16.63
12.46
7.60
3.04
1.78
110.75
Lodi
1948-2002
1.19
1.95
3.84
6.01
8.60
9.92
10.60
9.09
6.69
4.09
1.88
1.06
64.92
Long Beach Airport *
 
3.40
3.50
4.50
5.70
6.20
6.20
8.10
8.00
6.40
5.20
3.50
3.00
63.60
Los Angeles Airport *
 
3.50
3.60
5.10
5.80
6.70
6.40
7.80
7.30
6.10
5.30
4.00
3.60
65.50
Los Banos Det Resv
1968-2002
1.62
2.74
5.45
9.31
14.18
16.65
17.90
15.68
11.88
7.55
3.34
1.82
108.12
Mandeville Island
1955-1965
1.10
2.38
4.77
6.95
8.55
10.44
11.22
9.71
7.41
5.12
2.47
1.13
71.25
Manteca
1965-1977
1.20
1.71
4.04
6.33
9.24
10.53
11.64
10.22
7.19
4.13
1.78
1.16
69.17
Markley Cove
1970-2002
1.06
1.54
3.03
4.80
7.33
9.64
10.85
9.46
7.01
4.39
1.75
1.01
61.87
Nacimiento Dam
1957-1978
1.58
2.20
3.92
5.53
7.92
9.85
11.28
10.43
7.76
5.16
2.57
1.66
69.86
New Melones Dam
1979-1992
1.34
2.25
3.56
5.93
9.16
11.85
13.73
12.29
8.86
5.75
2.37
1.28
78.37
Oakdale Woodward Dam
1948-1967
1.03
1.72
3.42
5.47
8.95
11.88
14.23
12.22
8.53
5.52
2.10
1.02
76.09
Oakland Airport *
 
1.80
2.30
3.80
4.80
5.70
6.40
6.40
6.00
5.40
4.00
2.40
1.80
50.70
Panoche Creek
1953-1968
1.74
2.86
5.72
7.50
11.83
13.58
15.04
14.29
10.45
7.61
2.72
1.81
95.15
Red Bluff Aiport *
 
2.50
2.90
4.50
6.90
9.60
12.70
13.50
11.80
9.10
6.20
3.20
2.30
85.50
Sacramento Airport *
 
1.30
2.20
3.70
5.90
8.30
10.70
11.30
10.10
7.70
5.00
2.30
1.20
69.90
San Diego Airport *
 
3.20
3.40
4.70
6.10
6.40
5.60
6.80
6.70
5.80
4.90
3.80
3.30
60.50
San Francisco Airport *
 
1.70
2.40
3.80
5.30
6.40
7.10
6.70
6.60
5.90
4.40
2.40
1.70
54.50
San Luis Dam
1963-2002
1.44
2.49
5.29
8.64
13.13
15.78
18.41
16.67
11.99
7.46
3.02
1.58
105.90
SHASTA Dam
1948-2002
1.51
2.10
3.15
5.04
7.30
9.19
11.38
10.37
7.58
4.87
2.32
1.58
66.39
Stockton Mowry Bridge
1955-1965
0.72
1.58
3.87
5.97
8.47
10.95
10.82
9.56
6.60
3.93
1.70
0.74
64.91
Tahoe
1914-2002
M
M
M
M
4.27
5.24
5.97
5.35
3.18
1.57
M
M
25.58
Tracy Pumping Plant
1955-2002
1.54
2.48
5.31
8.16
12.00
14.88
16.92
14.52
10.62
6.59
2.95
1.47
97.44
Trinity Dam Vista Point
1959-1973
M
M
2.83
3.98
6.56
8.32
10.67
9.15
5.97
2.74
0.57
0.85
51.64
Trinity River Hatchery
1974-2002
0.58
1.02
2.75
4.45
6.77
8.31
9.72
8.90
6.17
3.22
0.99
0.51
53.39
Tulelake
1932-2002
M
M
M
4.56
7.55
8.39
9.52
8.53
6.80
3.49
M
M
48.84
Turntable Creek
1948-1969
1.98
2.60
3.76
5.25
6.32
8.29
10.23
9.90
8.35
5.71
3.08
2.37
67.84
Twitchell Dam
1962-2002
3.13
3.41
4.48
5.90
7.33
8.18
9.26
8.63
7.35
5.87
4.06
3.07
70.67
Warm Springs Dam
1973-1998
1.17
1.83
3.23
5.37
7.83
9.33
10.04
8.49
6.58
4.59
2.10
1.17
61.73
Whiskeytown Reservoir
1960-2002
0.90
1.23
2.51
4.04
6.41
8.07
10.07
8.82
6.26
3.42
1.14
0.78
53.65
Willow Creek 1 NW
1968-2002
0.58
1.35
1.81
2.74
4.73
6.50
7.53
6.05
3.79
1.94
0.75
0.92
38.69
Willows USBR
1967-1971
1.70
2.24
4.62
6.41
9.72
10.23
11.62
10.46
9.22
5.66
2.73
1.92
76.53
 
  State Extremes
 
* Also at earlier dates at the same time or other places
 
 
date or year
location
value
Record Highest Temp
10-Jul-13
Greenland Ranch
134.00
Record Lowest Temp
20-Jan-37
Boca
-45.00
Highest Average Annual Temp
  
Death Valley
76.30
Lowest Average Annual Temp
  
White Mountain 1
27.40
Consecutive Days Max >= 70
Apr-Oct 1992
Death Valley
205 days
Consecutive Days Min <= 32
Sep 72-May 73
White Mountain 2
265 days
       
Record Maximum Annual Precip
1909
Monumental
153.54
Record Minimum Annual Precip
1929
Death Valley
0.00
Record Maximum 24-hour Precip
22-23 Jan 1943
Hoegees Camp
26.12
Highest Average Annual Precip
  
Honeydew 1 SW
104.18
Lowest Average Annual Precip
  
Death Valley
2.25
Consecutive Days Measurable Precip
Jan-Mar 1998
Gasquet R.S.
63 days
Consecutive Days with no Measurable Precip
Aug 55-Jan 57
Ocotillo
468 days
       
Record Maximum Winter Snowfall
1906-07
Tamarack
884.00
Record Maximum 1-Day Snowfall
18-19 Jan 1933
Giant Forest
60.00
Highest Average Annual Snowfall
  
Soda Springs
470.70
 
  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
Bakersfield
1949-1999
27
26
25
14
5
1
*
1
4
5
15
18
143
2
0.86
Bishop
1954-1986
22
21
13
8
8
4
5
4
6
5
14
15
125
1
0.67
Blue Canyon
1948-1988
159
135
145
93
49
17
4
7
17
45
120
140
931
11
0.95
Eureka
1949-1999
123
104
109
62
42
19
6
11
16
44
98
117
750
9
0.92
Fresno
1948-1999
45
40
37
21
8
2
*
1
4
8
24
35
225
3
1.50
Long Beach Airport
1978-1999
43
37
38
11
3
2
1
1
4
7
16
24
187
2
1.36
Los Angeles Airport
1950-1999
41
35
30
15
4
1
1
1
4
5
19
26
181
2
1.57
Los Angeles City
1948-1999
43
37
33
16
4
1
*
2
4
5
19
27
191
2
1.77
Mount Shasta City
1948-1986
122
107
99
60
35
20
5
11
18
41
90
103
711
8
0.93
Oakland Airport
1948-1984
64
48
45
27
9
3
1
2
4
15
38
55
311
4
0.93
Red Bluff
1948-1996
68
50
45
24
12
7
1
4
7
18
50
59
345
4
1.44
Sacramento
1948-1994
66
55
53
26
10
3
1
1
5
15
39
56
330
4
1.00
San Diego Airport
1948-1999
39
29
30
16
6
3
1
1
4
7
19
24
179
2
1.36
San Francisco Airport
1948-1999
74
59
57
28
11
4
1
2
4
14
43
59
356
4
0.87
San Francisco City
1948-1999
77
62
59
28
12
4
1
3
5
16
49
64
380
4
1.40
Santa Maria
1948-1999
44
43
41
20
6
2
1
1
4
8
25
33
228
3
0.81
Stockton
1975-1995
47
48
53
23
7
3
2
2
7
12
32
41
277
3
0.86
 
  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
Eureka
43
46
52
57
58
59
55
51
55
50
44
41
51
Fresno
47
65
77
85
90
95
97
96
94
88
66
46
79
Los Angeles City
69
72
73
70
66
65
82
83
79
73
74
71
73
Red Bluff
52
63
67
79
83
88
96
94
93
81
60
50
78
Sacramento
48
65
74
82
90
94
97
96
93
86
66
49
78
San Diego
72
71
70
68
59
58
68
70
69
68
75
73
68
San Francisco City
56
62
69
73
72
73
66
65
72
70
62
53
66