Climate at a Glance
Statewide 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 February 2021. For more information, please see Climatological Rankings.
Pennsylvania
Average Temperature Rankings, September 1999
View Period (Months):All1234567891011121824364860
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| Period | Value | 1901-2000 Mean |
Anomaly | Rank (1895-2020) |
Warmest/Coolest Since |
Record |
|---|---|---|---|---|---|---|
|
September 1999 1-Month |
62.8°F (17.1°C) | 61.7°F (16.5°C) |
1.1°F (0.6°C) | 83rd Coolest | Coolest since: 1997 | 1918 |
| 44th Warmest | Warmest since: 1998 | 1961 | ||||
| Ties: 1911, 1932, 1946, 1968 | ||||||
|
Aug–Sep 1999 2-Month |
65.6°F (18.7°C) | 65.0°F (18.3°C) |
0.6°F (0.4°C) | 77th Coolest | Coolest since: 1997 | 1963 |
| 50th Warmest | Warmest since: 1998 | 2016 | ||||
| Ties: 1910, 1938, 1965, 1985, 2017 | ||||||
|
Jul–Sep 1999 3-Month |
68.4°F (20.2°C) | 66.8°F (19.3°C) |
1.6°F (0.9°C) | 105th Coolest | Coolest since: 1998 | 1924, 1962, 1963, 1976 |
| 22nd Warmest | Warmest since: 1988 | 2016 | ||||
| Ties: 1983, 1988 | ||||||
|
Jun–Sep 1999 4-Month |
68.2°F (20.1°C) | 66.7°F (19.3°C) |
1.5°F (0.8°C) | 110th Coolest | Coolest since: 1998 | 1924 |
| 17th Warmest | Warmest since: 1959 | 2005, 2016 | ||||
| Ties: 1936, 2015 | ||||||
|
May–Sep 1999 5-Month |
66.4°F (19.1°C) | 64.8°F (18.2°C) |
1.6°F (0.9°C) | 104th Coolest | Coolest since: 1997 | 1924 |
| 23rd Warmest | Warmest since: 1998 | 2018 | ||||
| Ties: 1906, 2002, 2020 | ||||||
|
Apr–Sep 1999 6-Month |
63.4°F (17.4°C) | 61.8°F (16.6°C) |
1.6°F (0.8°C) | 109th Coolest | Coolest since: 1997 | 1907, 1924 |
| 18th Warmest | Warmest since: 1998 | 2010 | ||||
| Ties: 2017 | ||||||
|
Mar–Sep 1999 7-Month |
59.2°F (15.1°C) | 58.1°F (14.5°C) |
1.1°F (0.6°C) | 101st Coolest | Coolest since: 1997 | 1924 |
| 26th Warmest | Warmest since: 1998 | 2010 | ||||
| Ties: 1908 | ||||||
|
Feb–Sep 1999 8-Month |
55.8°F (13.2°C) | 54.2°F (12.3°C) |
1.6°F (0.9°C) | 113th Coolest | Coolest since: 1997 | 1924 |
| 14th Warmest | Warmest since: 1998 | 2012 | ||||
| Ties: 1898, 1945, 1949 | ||||||
|
Jan–Sep 1999 9-Month |
52.6°F (11.4°C) | 51.0°F (10.6°C) |
1.6°F (0.8°C) | 108th Coolest | Coolest since: 1997 | 1940 |
| 19th Warmest | Warmest since: 1998 | 2012 | ||||
|
Dec 1998–Sep 1999 10-Month |
50.9°F (10.5°C) | 48.7°F (9.3°C) |
2.2°F (1.2°C) | 115th Coolest | Coolest since: 1997 | 1904 |
| 11th Warmest | Warmest since: 1998 | 2012 | ||||
| Ties: 2019 | ||||||
|
Nov 1998–Sep 1999 11-Month |
50.1°F (10.1°C) | 47.9°F (8.8°C) |
2.2°F (1.3°C) | 114th Coolest | Coolest since: 1997 | 1904 |
| 12th Warmest | Warmest since: 1998 | 2012 | ||||
|
Oct 1998–Sep 1999 12-Month |
50.2°F (10.1°C) | 48.1°F (8.9°C) |
2.1°F (1.2°C) | 115th Coolest | Coolest since: 1997 | 1904 |
| 11th Warmest | Warmest since: 1998 | 2012 | ||||
| Ties: 1949 | ||||||
|
Apr 1998–Sep 1999 18-Month |
54.7°F (12.6°C) | 52.7°F (11.5°C) |
2.0°F (1.1°C) | 119th Coolest | Coolest since: 1998 | 1918 |
| 7th Warmest | Warmest since: 1991 | 2012 | ||||
| Ties: 1991, 2006 | ||||||
|
Oct 1997–Sep 1999 24-Month |
50.6°F (10.3°C) | 48.1°F (8.9°C) |
2.5°F (1.4°C) | 121st Coolest | Coolest since: 1998 | 1905 |
| 4th Warmest | Warmest to Date | 2017 | ||||
|
Oct 1996–Sep 1999 36-Month |
49.7°F (9.8°C) | 48.1°F (8.9°C) |
1.6°F (0.9°C) | 113th Coolest | Coolest since: 1998 | 1979 |
| 11th Warmest | Warmest since: 1933 | 2018 | ||||
| Ties: 1933 | ||||||
|
Oct 1995–Sep 1999 48-Month |
49.1°F (9.5°C) | 48.1°F (8.9°C) |
1.0°F (0.6°C) | 99th Coolest | Coolest since: 1998 | 1907 |
| 24th Warmest | Warmest since: 1993 | 2019 | ||||
| Ties: 1934, 1992, 1993, 2004 | ||||||
|
Oct 1994–Sep 1999 60-Month |
49.2°F (9.6°C) | 48.1°F (8.9°C) |
1.1°F (0.7°C) | 103rd Coolest | Coolest since: 1998 | 1908 |
| 19th Warmest | Warmest since: 1991 | 2020 | ||||
| Ties: 1991, 2000, 2004, 2005, 2007 | ||||||
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: Statewide Time Series, published March 2021, retrieved on March 9, 2021 from https://www.ncdc.noaa.gov/cag/