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, January 2021

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PeriodValue1901-2000
Mean		AnomalyRank
(1895-2023)		Warmest/Coolest
Since		Record
January 2021
1-Month		45.5°F
(7.5°C)		42.3°F
(5.7°C)		3.2°F
(1.8°C)		111th Coolest
Coolest since:
1937
19th Warmest
Warmest since:
2014
Ties: 1896, 1978
Dec 2020–Jan 2021
2-Month		45.5°F
(7.5°C)		42.7°F
(5.9°C)		2.8°F
(1.6°C)		116th Coolest
Coolest since:
1949
13th Warmest
Warmest since:
2018
Ties: 1938, 2011, 2019
Nov 2020–Jan 2021
3-Month		47.3°F
(8.5°C)		45.0°F
(7.2°C)		2.3°F
(1.3°C)		111th Coolest
Coolest since:
1949
18th Warmest
Warmest since:
2018
Oct 2020–Jan 2021
4-Month		52.0°F
(11.1°C)		48.6°F
(9.2°C)		3.4°F
(1.9°C)		124th Coolest
Coolest since:
1917
5th Warmest
Warmest since:
2015
Ties: 2000
Sep 2020–Jan 2021
5-Month		56.4°F
(13.6°C)		52.6°F
(11.4°C)		3.8°F
(2.2°C)		127th Coolest
Coolest since:
1917
2nd Warmest
Warmest since:
2015
Aug 2020–Jan 2021
6-Month		60.2°F
(15.7°C)		56.1°F
(13.4°C)		4.1°F
(2.3°C)		128th Coolest
Coolest since:
1917
1st Warmest
Warmest to Date
2021
Jul 2020–Jan 2021
7-Month		62.5°F
(16.9°C)		58.8°F
(14.9°C)		3.7°F
(2.0°C)		126th Coolest
Coolest since:
1917
3rd Warmest
Warmest since:
2015, 2018
Jun 2020–Jan 2021
8-Month		63.5°F
(17.5°C)		60.0°F
(15.6°C)		3.5°F
(1.9°C)		126th Coolest
Coolest since:
1917
3rd Warmest
Warmest since:
2018
May 2020–Jan 2021
9-Month		63.6°F
(17.6°C)		60.0°F
(15.6°C)		3.6°F
(2.0°C)		126th Coolest
Coolest since:
1917
3rd Warmest
Warmest since:
2015
Apr 2020–Jan 2021
10-Month		62.9°F
(17.2°C)		59.4°F
(15.2°C)		3.5°F
(2.0°C)		125th Coolest
Coolest since:
1917
4th Warmest
Warmest since:
2015
Mar 2020–Jan 2021
11-Month		61.5°F
(16.4°C)		58.5°F
(14.7°C)		3.0°F
(1.7°C)		125th Coolest
Coolest since:
1949
4th Warmest
Warmest since:
2015
Feb 2020–Jan 2021
12-Month		60.5°F
(15.8°C)		57.4°F
(14.1°C)		3.1°F
(1.7°C)		126th Coolest
Coolest since:
1949
3rd Warmest
Warmest since:
2015
Aug 2019–Jan 2021
18-Month		59.6°F
(15.3°C)		56.9°F
(13.8°C)		2.7°F
(1.5°C)		122nd Coolest
Coolest since:
1913
6th Warmest
Warmest since:
2016, 2022
Feb 2019–Jan 2021
24-Month		59.4°F
(15.2°C)		57.4°F
(14.1°C)		2.0°F
(1.1°C)		119th Coolest
Coolest since:
1913
9th Warmest
Warmest since:
2016
Feb 2018–Jan 2021
36-Month		59.6°F
(15.3°C)		57.4°F
(14.1°C)		2.2°F
(1.2°C)		118th Coolest
Coolest since:
1914
9th Warmest
Warmest since:
2016, 2017
Feb 2017–Jan 2021
48-Month		59.9°F
(15.5°C)		57.4°F
(14.1°C)		2.5°F
(1.4°C)		121st Coolest
Coolest since:
1913
5th Warmest
Warmest since:
2018
Feb 2016–Jan 2021
60-Month		59.9°F
(15.5°C)		57.3°F
(14.1°C)		2.6°F
(1.4°C)		120th Coolest
Coolest since:
1913
5th Warmest
Warmest since:
2018, 2019
Ties: 2020

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