Divisional Rankings

Divisional 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.

Montana, Climate Division 3. North Central

Precipitation Rankings, December 1917

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PeriodValue1901-2000
Mean
AnomalyRank
(1895-2022)
Wettest/Driest
Since
Record
December 1917
1-Month
2.51"
(63.75mm)
0.77"
(19.56mm)
1.74"
(44.19mm)
128th Driest
Driest since:
1913
1st Wettest
Wettest to Date
1917
Nov–Dec 1917
2-Month
2.54"
(64.52mm)
1.49"
(37.85mm)
1.05"
(26.67mm)
118th Driest
Driest since:
1908
11th Wettest
Wettest since:
1897
Oct–Dec 1917
3-Month
3.03"
(76.96mm)
2.31"
(58.67mm)
0.72"
(18.29mm)
101st Driest
Driest since:
1907
28th Wettest
Wettest since:
1946
Sep–Dec 1917
4-Month
5.17"
(131.32mm)
3.60"
(91.44mm)
1.57"
(39.88mm)
112th Driest
Driest since:
1904
17th Wettest
Wettest since:
1911
Aug–Dec 1917
5-Month
5.88"
(149.35mm)
4.94"
(125.48mm)
0.94"
(23.87mm)
101st Driest
Driest since:
1904
28th Wettest
Wettest since:
1985
Jul–Dec 1917
6-Month
6.19"
(157.23mm)
6.53"
(165.86mm)
-0.34"
(-8.63mm)
60th Driest
Driest since:
1904
69th Wettest
Wettest since:
1911
Jun–Dec 1917
7-Month
7.91"
(200.91mm)
9.48"
(240.79mm)
-1.57"
(-39.88mm)
33rd Driest
Driest since:
1904
96th Wettest
Wettest since:
1993
May–Dec 1917
8-Month
9.46"
(240.28mm)
11.64"
(295.66mm)
-2.18"
(-55.38mm)
29th Driest
Driest since:
1904
100th Wettest
Wettest since:
1927
Apr–Dec 1917
9-Month
10.86"
(275.84mm)
12.74"
(323.60mm)
-1.88"
(-47.76mm)
30th Driest
Driest since:
1904
99th Wettest
Wettest since:
1927
Mar–Dec 1917
10-Month
11.47"
(291.34mm)
13.55"
(344.17mm)
-2.08"
(-52.83mm)
26th Driest
Driest since:
1904
103rd Wettest
Wettest since:
1975
Feb–Dec 1917
11-Month
12.47"
(316.74mm)
14.16"
(359.66mm)
-1.69"
(-42.92mm)
36th Driest
Driest since:
1904
93rd Wettest
Wettest since:
1927
Jan–Dec 1917
12-Month
13.25"
(336.55mm)
14.96"
(379.98mm)
-1.71"
(-43.43mm)
35th Driest
Driest since:
1904
94th Wettest
Wettest since:
1927
Jul 1916–Dec 1917
18-Month
22.26"
(565.40mm)
21.51"
(546.35mm)
0.75"
(19.05mm)
80th Driest
Driest since:
1905
48th Wettest
Wettest since:
1927
Jan 1916–Dec 1917
24-Month
33.98"
(863.09mm)
29.93"
(760.22mm)
4.05"
(102.87mm)
107th Driest
Driest since:
1919
21st Wettest
Wettest since:
1897
Jan 1915–Dec 1917
36-Month
51.50"
(1,308.10mm)
44.97"
(1,142.24mm)
6.53"
(165.86mm)
119th Driest
Driest since:
1919
8th Wettest
Wettest since:
1898
Jan 1914–Dec 1917
48-Month
66.49"
(1,688.85mm)
60.02"
(1,524.51mm)
6.47"
(164.34mm)
114th Driest
Driest since:
1920
12th Wettest
Wettest since:
1899
Jan 1913–Dec 1917
60-Month
80.16"
(2,036.06mm)
75.12"
(1,908.05mm)
5.04"
(128.01mm)
97th Driest
Driest since:
1921
28th Wettest
Wettest since:
1899

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