Climate at a Glance

City 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 August 2021. For more information, please see Climatological Rankings.


Philadelphia, Pennsylvania

Average Temperature Rankings, December 1999

View Period (Months):All1234567891011121824364860
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  • Record Warmest
Period Value 1981-2010
Mean
Anomaly Rank
(1895-2020)
Warmest/Coolest
Since
Record
December 1999
1-Month
39.8°F
(4.3°C)
37.1°F
(2.8°C)
2.7°F
(1.5°C)
65th Coolest Coolest since: 1997 1989
17th Warmest Warmest since: 1998 2015
Nov–Dec 1999
2-Month
45.3°F
(7.4°C)
42.2°F
(5.7°C)
3.1°F
(1.7°C)
75th Coolest Coolest since: 1998 1976, 1989
6th Warmest Warmest since: 1990 2015
Ties: 1990
Oct–Dec 1999
3-Month
48.8°F
(9.3°C)
47.1°F
(8.4°C)
1.7°F
(0.9°C)
68th Coolest Coolest since: 1997 1976
13th Warmest Warmest since: 1998 2015
Sep–Dec 1999
4-Month
54.1°F
(12.3°C)
52.5°F
(11.4°C)
1.6°F
(0.9°C)
69th Coolest Coolest since: 1997 1976
12th Warmest Warmest since: 1998 2015
Ties: 2005
Aug–Dec 1999
5-Month
58.7°F
(14.8°C)
57.2°F
(14.0°C)
1.5°F
(0.8°C)
68th Coolest Coolest since: 1997 1976
13th Warmest Warmest since: 1998 2015
Ties: 1990, 2019
Jul–Dec 1999
6-Month
62.4°F
(16.9°C)
60.6°F
(15.9°C)
1.8°F
(1.0°C)
71st Coolest Coolest since: 1997 1962
10th Warmest Warmest since: 1998 2015
Ties: 2007, 2019
Jun–Dec 1999
7-Month
63.9°F
(17.7°C)
62.4°F
(16.9°C)
1.5°F
(0.8°C)
68th Coolest Coolest since: 1998 1962
12th Warmest Warmest to Date 2015
May–Dec 1999
8-Month
63.9°F
(17.7°C)
62.5°F
(16.9°C)
1.4°F
(0.8°C)
67th Coolest Coolest since: 1997 1962, 1967
13th Warmest Warmest since: 1998 2015
Apr–Dec 1999
9-Month
62.7°F
(17.1°C)
61.5°F
(16.4°C)
1.2°F
(0.7°C)
66th Coolest Coolest since: 1997 1967
14th Warmest Warmest since: 1998 2015
Ties: 2018
Mar–Dec 1999
10-Month
60.7°F
(15.9°C)
59.7°F
(15.4°C)
1.0°F
(0.5°C)
66th Coolest Coolest since: 1997 1950, 1967
13th Warmest Warmest since: 1998 2015
Ties: 2017
Feb–Dec 1999
11-Month
58.6°F
(14.8°C)
57.4°F
(14.1°C)
1.2°F
(0.7°C)
64th Coolest Coolest since: 1997 1967
15th Warmest Warmest since: 1998 2012
Jan–Dec 1999
12-Month
56.6°F
(13.7°C)
55.3°F
(12.9°C)
1.3°F
(0.8°C)
65th Coolest Coolest since: 1997 1958
14th Warmest Warmest since: 1998 2012
Ties: 2001
Jul 1998–Dec 1999
18-Month
58.6°F
(14.8°C)
57.1°F
(13.9°C)
1.5°F
(0.9°C)
69th Coolest Coolest since: 1998 1963
9th Warmest Warmest to Date 2016
Jan 1998–Dec 1999
24-Month
57.3°F
(14.1°C)
55.3°F
(12.9°C)
2.0°F
(1.2°C)
70th Coolest Coolest since: 1998 1963
6th Warmest Warmest to Date 2012
Ties: 2013
Jan 1997–Dec 1999
36-Month
56.4°F
(13.6°C)
55.3°F
(12.9°C)
1.1°F
(0.7°C)
61st Coolest Coolest since: 1998 1963
12th Warmest Warmest to Date 2012
Ties: 2010
Jan 1996–Dec 1999
48-Month
55.7°F
(13.2°C)
55.3°F
(12.9°C)
0.4°F
(0.3°C)
50th Coolest Coolest since: 1998 1963
20th Warmest Warmest to Date 2013
Ties: 2005
Jan 1995–Dec 1999
60-Month
55.6°F
(13.1°C)
55.3°F
(12.9°C)
0.3°F
(0.2°C)
47th Coolest Coolest since: 1998 1966
20th Warmest Warmest to Date 2020

Citing This Page

  • NOAA National Centers for Environmental information, Climate at a Glance: City Time Series, published September 2021, retrieved on September 22, 2021 from https://www.ncdc.noaa.gov/cag/