NOAA's National Centers for Environmental Information
County Rankings
Chester County, Pennsylvania
December 2011 Average Temperature Rankings
| Period | Value | 1901-2000 Mean | Anomaly | Rank (1895-2025) | Coolest/Warmest Since | Record |
|---|---|---|---|---|---|---|
| December 2011 1-Month | 40.0°F (4.4°C) | 32.3°F (0.2°C) | 7.7°F | 125th Coolest | Coolest since: | 1989 |
| 6th Warmest | Warmest since: | 2015 | ||||
| Nov– 2-Month | 44.1°F (6.7°C) | 37.4°F (3.0°C) | 6.7°F | 127th Coolest | Coolest since: | 1917 |
| 4th Warmest | Warmest since: | 2015 | ||||
| Oct– 3-Month | 47.7°F (8.7°C) | 42.9°F (6.1°C) | 4.8°F | 127th Coolest | Coolest since: | 1917 |
| 4th Warmest | Warmest since: | 2015 | ||||
| Sep– 4-Month | 52.9°F (11.6°C) | 48.4°F (9.1°C) | 4.5°F | 128th Coolest | Coolest since: | 1917 |
| 3rd Warmest | Warmest since: | 2015 | ||||
| Aug– 5-Month | 56.9°F (13.8°C) | 53.1°F (11.7°C) | 3.8°F | 127th Coolest | Coolest since: | 1917 |
| 4th Warmest | Warmest since: | 2015 | ||||
| Ties: 1931, 2001 | ||||||
| Jul– 6-Month | 60.6°F (15.9°C) | 56.6°F (13.7°C) | 4.0°F | 129th Coolest | Coolest since: | 1917 |
| 2nd Warmest | Warmest to Date | 2015 | ||||
| Jun– 7-Month | 62.2°F (16.8°C) | 58.3°F (14.6°C) | 3.9°F | 129th Coolest | Coolest since: | 1917 |
| 2nd Warmest | Warmest to Date | 2015 | ||||
| May– 8-Month | 62.5°F (16.9°C) | 58.6°F (14.8°C) | 3.9°F | 129th Coolest | Coolest since: | 1917 |
| 2nd Warmest | Warmest to Date | 2015 | ||||
| Apr– 9-Month | 61.6°F (16.4°C) | 57.7°F (14.3°C) | 3.9°F | 129th Coolest | Coolest since: | 1917 |
| 2nd Warmest | Warmest to Date | 2015 | ||||
| Mar– 10-Month | 59.6°F (15.3°C) | 55.9°F (13.3°C) | 3.7°F | 130th Coolest | Coolest since: | 1917 |
| 1st Warmest | Warmest to Date | 2011 | ||||
| Feb– 11-Month | 57.2°F (14.0°C) | 53.6°F (12.0°C) | 3.6°F | 128th Coolest | Coolest since: | 1904 |
| 3rd Warmest | Warmest to Date | 2012, 2024 | ||||
| Jan– 12-Month | 54.7°F (12.6°C) | 51.5°F (10.8°C) | 3.2°F | 124th Coolest | Coolest since: | 1904 |
| 7th Warmest | Warmest since: | 2012 | ||||
| Jul 2010– 18-Month | 56.0°F (13.3°C) | 53.2°F (11.8°C) | 2.8°F | 121st Coolest | Coolest since: | 1904 |
| 9th Warmest | Warmest since: | 2012 | ||||
| Ties: 2002 | ||||||
| Jan 2010– 24-Month | 54.5°F (12.5°C) | 51.5°F (10.8°C) | 3.0°F | 124th Coolest | Coolest since: | 1905 |
| 6th Warmest | Warmest since: | 2012, 2024 | ||||
| Ties: 1999 | ||||||
| Jan 2009– 36-Month | 53.9°F (12.2°C) | 51.5°F (10.8°C) | 2.4°F | 116th Coolest | Coolest since: | 1905 |
| 13th Warmest | Warmest since: | 2012 | ||||
| Ties: 2006 | ||||||
| Jan 2008– 48-Month | 53.8°F (12.1°C) | 51.5°F (10.8°C) | 2.3°F | 117th Coolest | Coolest since: | 1907 |
| 11th Warmest | Warmest since: | 2023, 2024 | ||||
| Ties: 2007 | ||||||
| Jan 2007– 60-Month | 53.8°F (12.1°C) | 51.5°F (10.8°C) | 2.3°F | 118th Coolest | Coolest since: | 1907 |
| 9th Warmest | Warmest since: | 2024 | ||||
Citing This Page
- NOAA National Centers for Environmental information, Climate at a Glance: County Rankings, published March 2025, retrieved on March 13, 2025 from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/rankings
