Statewide Rankings

Statewide Data Info
Please note, Degree Days and Palmer Indices are not available for Alaska. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Arizona

Precipitation Rankings, April 1978

View Period (Months):
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  • Record Driest
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  • Record Wettest
Period Value 1901-2000
Mean
Anomaly Rank
(1895-2022)
Wettest/Driest
Since
Record
April 1978
1-Month
0.56"
(14.22mm)
0.57"
(14.48mm)
-0.01"
(-0.26mm)
82nd Driest
Driest since:
1989, 1991
47th Wettest
Wettest since:
1926
Ties: 1923
Mar–Apr 1978
2-Month
3.41"
(86.61mm)
1.69"
(42.93mm)
1.72"
(43.68mm)
121st Driest
Driest since:
2008
8th Wettest
Wettest since:
1905
Feb–Apr 1978
3-Month
5.72"
(145.29mm)
2.83"
(71.88mm)
2.89"
(73.41mm)
126th Driest
Driest since:
1972
3rd Wettest
Wettest since:
1905
Jan–Apr 1978
4-Month
8.64"
(219.46mm)
3.98"
(101.09mm)
4.66"
(118.37mm)
125th Driest
Driest since:
1972
4th Wettest
Wettest since:
1905
Dec 1977–Apr 1978
5-Month
9.52"
(241.81mm)
5.16"
(131.06mm)
4.36"
(110.75mm)
123rd Driest
Driest since:
1904
5th Wettest
Wettest since:
1905
Nov 1977–Apr 1978
6-Month
9.87"
(250.70mm)
6.01"
(152.65mm)
3.86"
(98.05mm)
119th Driest
Driest since:
1904
9th Wettest
Wettest since:
1905
Oct 1977–Apr 1978
7-Month
11.08"
(281.43mm)
6.89"
(175.01mm)
4.19"
(106.42mm)
120th Driest
Driest since:
1904
8th Wettest
Wettest since:
1941
Sep 1977–Apr 1978
8-Month
12.40"
(314.96mm)
8.08"
(205.23mm)
4.32"
(109.73mm)
119th Driest
Driest since:
2002
9th Wettest
Wettest since:
1941
Aug 1977–Apr 1978
9-Month
14.37"
(365.00mm)
10.16"
(258.06mm)
4.21"
(106.94mm)
116th Driest
Driest since:
2021
12th Wettest
Wettest since:
1941
Jul 1977–Apr 1978
10-Month
16.16"
(410.46mm)
11.97"
(304.04mm)
4.19"
(106.42mm)
116th Driest
Driest since:
2021
12th Wettest
Wettest since:
1941
Jun 1977–Apr 1978
11-Month
16.50"
(419.10mm)
12.25"
(311.15mm)
4.25"
(107.95mm)
117th Driest
Driest since:
2021
11th Wettest
Wettest since:
1941
May 1977–Apr 1978
12-Month
16.91"
(429.51mm)
12.59"
(319.79mm)
4.32"
(109.72mm)
117th Driest
Driest since:
2021
11th Wettest
Wettest since:
1941
Nov 1976–Apr 1978
18-Month
19.97"
(507.24mm)
18.61"
(472.69mm)
1.36"
(34.55mm)
92nd Driest
Driest since:
1903
35th Wettest
Wettest since:
1993
May 1976–Apr 1978
24-Month
27.24"
(691.90mm)
25.16"
(639.06mm)
2.08"
(52.84mm)
96th Driest
Driest since:
1904
31st Wettest
Wettest since:
1906
May 1975–Apr 1978
36-Month
37.46"
(951.48mm)
37.71"
(957.83mm)
-0.25"
(-6.35mm)
76th Driest
Driest since:
1904
50th Wettest
Wettest since:
1907
Ties: 1954
May 1974–Apr 1978
48-Month
49.16"
(1,248.66mm)
50.22"
(1,275.59mm)
-1.06"
(-26.93mm)
67th Driest
Driest since:
1904
58th Wettest
Wettest since:
1908
May 1973–Apr 1978
60-Month
56.66"
(1,439.16mm)
62.77"
(1,594.36mm)
-6.11"
(-155.20mm)
36th Driest
Driest since:
1904
88th Wettest
Wettest since:
1909

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