County Rankings

County Data Info
Please note, Palmer Drought Severity Index (PDSI), Palmer Hydrological Drought Index (PHDI), and Palmer Modified Drought Index (PMDI) are not offered for multiple-month time scales.

Chester County, Pennsylvania

December 2015 Average Temperature Rankings

View Period (Months):
  • Record Coolest
  • Bottom ⅒
  • Bottom ⅓
  • Normal
  • Top ⅓
  • Top ⅒
  • Record Warmest
PeriodValue
1901-2000
Mean		AnomalyRank
(1895-2025)
Coolest/Warmest
Since		Record
December 2015
1-Month
47.3°F
(8.5°C)
32.3°F
(0.2°C)
15.0°F130th Coolest
Coolest since:
1989
1st WarmestWarmest to Date2015
Nov–Dec 2015
2-Month
48.1°F
(8.9°C)
37.4°F
(3.0°C)
10.7°F130th Coolest
Coolest since:
1917
1st WarmestWarmest to Date2015
Oct–Dec 2015
3-Month
50.0°F
(10.0°C)
42.9°F
(6.1°C)
7.1°F130th Coolest
Coolest since:
1917
1st WarmestWarmest to Date2015
Sep–Dec 2015
4-Month
55.0°F
(12.8°C)
48.4°F
(9.1°C)
6.6°F130th Coolest
Coolest since:
1917
1st WarmestWarmest to Date2015
Aug–Dec 2015
5-Month
58.8°F
(14.9°C)
53.1°F
(11.7°C)
5.7°F130th Coolest
Coolest since:
1917
1st WarmestWarmest to Date2015
Jul–Dec 2015
6-Month
61.5°F
(16.4°C)
56.6°F
(13.7°C)
4.9°F130th Coolest
Coolest since:
1917
1st WarmestWarmest to Date2015
Jun–Dec 2015
7-Month
62.9°F
(17.2°C)
58.3°F
(14.6°C)
4.6°F130th Coolest
Coolest since:
1917
1st WarmestWarmest to Date2015
May–Dec 2015
8-Month
63.4°F
(17.4°C)
58.6°F
(14.8°C)
4.8°F130th Coolest
Coolest since:
1917
1st WarmestWarmest to Date2015
Apr–Dec 2015
9-Month
62.1°F
(16.7°C)
57.7°F
(14.3°C)
4.4°F130th Coolest
Coolest since:
1917
1st WarmestWarmest to Date2015
Mar–Dec 2015
10-Month
59.5°F
(15.3°C)
55.9°F
(13.3°C)
3.6°F129th Coolest
Coolest since:
1917
2nd Warmest
Warmest since:
2011
Feb–Dec 2015
11-Month
56.1°F
(13.4°C)
53.6°F
(12.0°C)
2.5°F118th Coolest
Coolest since:
1904
13th Warmest
Warmest since:
2012, 2024
Jan–Dec 2015
12-Month
53.7°F
(12.1°C)
51.5°F
(10.8°C)
2.2°F113th Coolest
Coolest since:
1904
18th Warmest
Warmest since:
2012
Ties: 1949, 2007
Jul 2014–Dec 2015
18-Month
55.1°F
(12.8°C)
53.2°F
(11.8°C)
1.9°F110th Coolest
Coolest since:
1904
20th Warmest
Warmest since:
2012
Jan 2014–Dec 2015
24-Month
52.6°F
(11.4°C)
51.5°F
(10.8°C)
1.1°F99th Coolest
Coolest since:
1905
31st Warmest
Warmest since:
2012, 2024
Ties: 1922, 1931
Jan 2013–Dec 2015
36-Month
52.7°F
(11.5°C)
51.5°F
(10.8°C)
1.2°F100th Coolest
Coolest since:
1905
29th Warmest
Warmest since:
2012
Ties: 1954
Jan 2012–Dec 2015
48-Month
53.4°F
(11.9°C)
51.5°F
(10.8°C)
1.9°F109th Coolest
Coolest since:
1907
19th Warmest
Warmest since:
2023, 2024
Ties: 2006
Jan 2011–Dec 2015
60-Month
53.7°F
(12.1°C)
51.5°F
(10.8°C)
2.2°F114th Coolest
Coolest since:
1907
13th Warmest
Warmest since:
2024
Ties: 2008

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