Climate at a Glance

Regional Rankings

Look up monthly rankings for 1-12, 18, 24, 36, 48, and 60-month time periods using the options below. Data and statistics are as of May 2021. For more information, please see Climatological Rankings.


California River Basin

Average Temperature Rankings, September 1940

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Period Value 1901-2000
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
September 1940
1-Month
66.6°F
(19.2°C)
68.5°F
(20.3°C)
-1.9°F
(-1.1°C)
20th Coolest Coolest since: 1931 1986
107th Warmest Warmest since: 1939 2020
Ties: 1961, 1972
Aug–Sep 1940
2-Month
70.6°F
(21.4°C)
71.1°F
(21.7°C)
-0.5°F
(-0.3°C)
40th Coolest Coolest since: 1930 1900
87th Warmest Warmest since: 1939 2020
Ties: 1915, 1923
Jul–Sep 1940
3-Month
71.7°F
(22.1°C)
72.3°F
(22.4°C)
-0.6°F
(-0.3°C)
31st Coolest Coolest since: 1930 1900
96th Warmest Warmest since: 1939 2020
Ties: 1896, 1921, 1944, 1947, 1987
Jun–Sep 1940
4-Month
71.9°F
(22.2°C)
71.3°F
(21.8°C)
0.6°F
(0.4°C)
80th Coolest Coolest since: 1934 1907
47th Warmest Warmest since: 1939 2020
Ties: 1998
May–Sep 1940
5-Month
70.4°F
(21.3°C)
69.2°F
(20.7°C)
1.2°F
(0.6°C)
96th Coolest Coolest since: 1939 1907
31st Warmest Warmest since: 1937 2020
Ties: 1974
Apr–Sep 1940
6-Month
68.0°F
(20.0°C)
66.7°F
(19.3°C)
1.3°F
(0.7°C)
96th Coolest Coolest since: 1938 1912
31st Warmest Warmest since: 1939 2020
Ties: 1959, 1966, 1990
Mar–Sep 1940
7-Month
65.6°F
(18.7°C)
64.1°F
(17.8°C)
1.5°F
(0.9°C)
98th Coolest Coolest since: 1939 1912
29th Warmest Warmest since: 1936 2014
Ties: 1990
Feb–Sep 1940
8-Month
63.3°F
(17.4°C)
61.8°F
(16.6°C)
1.5°F
(0.8°C)
102nd Coolest Coolest since: 1939 1911
25th Warmest Warmest since: 1934 2015
Ties: 1994
Jan–Sep 1940
9-Month
61.3°F
(16.3°C)
59.6°F
(15.3°C)
1.7°F
(1.0°C)
105th Coolest Coolest since: 1939 1903, 1911, 1917
22nd Warmest Warmest since: 1934 2015
Ties: 1986, 2001
Dec 1939–Sep 1940
10-Month
59.9°F
(15.5°C)
58.0°F
(14.4°C)
1.9°F
(1.1°C)
110th Coolest Coolest since: 1939 1917, 1933
16th Warmest Warmest since: 1934 2015
Ties: 1984, 2012
Nov 1939–Sep 1940
11-Month
59.1°F
(15.1°C)
57.1°F
(13.9°C)
2.0°F
(1.2°C)
110th Coolest Coolest since: 1939 1917
16th Warmest Warmest since: 1934 2015
Oct 1939–Sep 1940
12-Month
59.1°F
(15.1°C)
57.3°F
(14.1°C)
1.8°F
(1.0°C)
107th Coolest Coolest since: 1939 1917
19th Warmest Warmest since: 1934 2015
Ties: 2012
Apr 1939–Sep 1940
18-Month
62.2°F
(16.8°C)
60.5°F
(15.8°C)
1.7°F
(1.0°C)
110th Coolest Coolest since: 1939 1917
16th Warmest Warmest to Date 2015
Ties: 1959
Oct 1938–Sep 1940
24-Month
58.4°F
(14.7°C)
57.4°F
(14.1°C)
1.0°F
(0.6°C)
99th Coolest Coolest since: 1939 1913, 1917, 1949
26th Warmest Warmest since: 1935 2015
Ties: 1988, 1989, 2010, 2012
Oct 1937–Sep 1940
36-Month
58.3°F
(14.6°C)
57.4°F
(14.1°C)
0.9°F
(0.5°C)
94th Coolest Coolest since: 1939 1913
30th Warmest Warmest since: 1936 2016
Ties: 1993
Oct 1936–Sep 1940
48-Month
57.9°F
(14.4°C)
57.4°F
(14.1°C)
0.5°F
(0.3°C)
81st Coolest Coolest since: 1939 1913
42nd Warmest Warmest since: 1937 2017, 2018
Ties: 1936, 1959, 1982
Oct 1935–Sep 1940
60-Month
57.9°F
(14.4°C)
57.3°F
(14.1°C)
0.6°F
(0.3°C)
80th Coolest Coolest since: 1939 1913
42nd Warmest Warmest since: 1938 2018
Ties: 1985, 1987

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: Regional Time Series, published June 2021, retrieved on June 13, 2021 from https://www.ncdc.noaa.gov/cag/