Regional Rankings

Regional Data Info
Please note, Palmer Indices are not available for NWS Regions. Degree Days are not available for Great Plains, Souther Plains and Gulf Coast Rockies and Westward, River Basins, or Agricultural Belts. Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

California River Basin

Average Temperature Rankings, October 2021

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2022)		Warmest/Coolest
Since		Record
October 2021
1-Month		58.2°F
(14.6°C)		59.5°F
(15.3°C)		-1.3°F
(-0.7°C)		34th Coolest
Coolest since:
1916
95th Warmest
Warmest since:
2020
Ties: 2004
Sep–Oct 2021
2-Month		65.2°F
(18.4°C)		64.0°F
(17.8°C)		1.2°F
(0.6°C)		93rd Coolest
Coolest since:
1916, 1920
36th Warmest
Warmest since:
2020
Ties: 1955, 1978, 2002
Aug–Oct 2021
3-Month		69.1°F
(20.6°C)		67.3°F
(19.6°C)		1.8°F
(1.0°C)		109th Coolest
Coolest since:
1900
20th Warmest
Warmest since:
2020
Jul–Oct 2021
4-Month		71.8°F
(22.1°C)		69.1°F
(20.6°C)		2.7°F
(1.5°C)		120th Coolest
Coolest since:
1912
9th Warmest
Warmest since:
2020
Ties: 1967
Jun–Oct 2021
5-Month		72.4°F
(22.4°C)		68.9°F
(20.5°C)		3.5°F
(1.9°C)		124th Coolest
Coolest since:
1912
5th Warmest
Warmest since:
2020
Ties: 2014
May–Oct 2021
6-Month		71.1°F
(21.7°C)		67.6°F
(19.8°C)		3.5°F
(1.9°C)		126th Coolest
Coolest since:
1916
3rd Warmest
Warmest since:
2020
Ties: 2014
Apr–Oct 2021
7-Month		69.3°F
(20.7°C)		65.6°F
(18.7°C)		3.7°F
(2.0°C)		127th Coolest
Coolest since:
1912
2nd Warmest
Warmest since:
2020
Mar–Oct 2021
8-Month		66.6°F
(19.2°C)		63.5°F
(17.5°C)		3.1°F
(1.7°C)		123rd Coolest
Coolest since:
1912
6th Warmest
Warmest since:
2014, 2015
Feb–Oct 2021
9-Month		64.5°F
(18.1°C)		61.5°F
(16.4°C)		3.0°F
(1.7°C)		123rd Coolest
Coolest since:
1912
6th Warmest
Warmest since:
2015
Ties: 2016
Jan–Oct 2021
10-Month		62.6°F
(17.0°C)		59.6°F
(15.3°C)		3.0°F
(1.7°C)		124th Coolest
Coolest since:
1911, 1912
5th Warmest
Warmest since:
2015
Dec 2020–Oct 2021
11-Month		61.0°F
(16.1°C)		58.1°F
(14.5°C)		2.9°F
(1.6°C)		123rd Coolest
Coolest since:
1912
5th Warmest
Warmest since:
2015
Ties: 2018
Nov 2020–Oct 2021
12-Month		60.2°F
(15.7°C)		57.4°F
(14.1°C)		2.8°F
(1.6°C)		122nd Coolest
Coolest since:
1912
6th Warmest
Warmest since:
2015
May 2020–Oct 2021
18-Month		64.0°F
(17.8°C)		60.8°F
(16.0°C)		3.2°F
(1.8°C)		125th Coolest
Coolest since:
1912
3rd Warmest
Warmest since:
2015
Nov 2019–Oct 2021
24-Month		60.4°F
(15.8°C)		57.4°F
(14.1°C)		3.0°F
(1.7°C)		123rd Coolest
Coolest since:
1912, 1949
4th Warmest
Warmest since:
2015
Nov 2018–Oct 2021
36-Month		59.7°F
(15.4°C)		57.4°F
(14.1°C)		2.3°F
(1.3°C)		118th Coolest
Coolest since:
1913
8th Warmest
Warmest since:
2016
Nov 2017–Oct 2021
48-Month		59.9°F
(15.5°C)		57.4°F
(14.1°C)		2.5°F
(1.4°C)		119th Coolest
Coolest since:
1912, 1913
6th Warmest
Warmest since:
2017
Nov 2016–Oct 2021
60-Month		59.9°F
(15.5°C)		57.4°F
(14.1°C)		2.5°F
(1.4°C)		118th Coolest
Coolest since:
1913
6th Warmest
Warmest since:
2018

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