NOAA's National Centers for Environmental Information
County Rankings
Chester County, Pennsylvania
December 2020 Average Temperature Rankings
| Period | Value | 1901-2000 Mean | Anomaly | Rank (1895-2025) | Coolest/Warmest Since | Record |
|---|---|---|---|---|---|---|
| December 2020 1-Month | 36.0°F (2.2°C) | 32.3°F (0.2°C) | 3.7°F | 105th Coolest | Coolest since: | 1989 |
| 26th Warmest | Warmest since: | 2015 | ||||
| Ties: 1940, 1987 | ||||||
| Nov– 2-Month | 42.4°F (5.8°C) | 37.4°F (3.0°C) | 5.0°F | 122nd Coolest | Coolest since: | 1917 |
| 9th Warmest | Warmest since: | 2015 | ||||
| Ties: 1990 | ||||||
| Oct– 3-Month | 47.0°F (8.3°C) | 42.9°F (6.1°C) | 4.1°F | 123rd Coolest | Coolest since: | 1917 |
| 8th Warmest | Warmest since: | 2015 | ||||
| Ties: 1984 | ||||||
| Sep– 4-Month | 51.8°F (11.0°C) | 48.4°F (9.1°C) | 3.4°F | 122nd Coolest | Coolest since: | 1917 |
| 9th Warmest | Warmest since: | 2015 | ||||
| Ties: 1971, 1998 | ||||||
| Aug– 5-Month | 56.5°F (13.6°C) | 53.1°F (11.7°C) | 3.4°F | 123rd Coolest | Coolest since: | 1917 |
| 8th Warmest | Warmest since: | 2015 | ||||
| Ties: 2007 | ||||||
| Jul– 6-Month | 60.2°F (15.7°C) | 56.6°F (13.7°C) | 3.6°F | 126th Coolest | Coolest since: | 1917 |
| 5th Warmest | Warmest since: | 2015 | ||||
| Jun– 7-Month | 61.8°F (16.6°C) | 58.3°F (14.6°C) | 3.5°F | 126th Coolest | Coolest since: | 1917 |
| 5th Warmest | Warmest since: | 2015 | ||||
| May– 8-Month | 61.4°F (16.3°C) | 58.6°F (14.8°C) | 2.8°F | 122nd Coolest | Coolest since: | 1917 |
| 9th Warmest | Warmest since: | 2015 | ||||
| Ties: 2012 | ||||||
| Apr– 9-Month | 60.0°F (15.6°C) | 57.7°F (14.3°C) | 2.3°F | 116th Coolest | Coolest since: | 1917 |
| 15th Warmest | Warmest since: | 2015 | ||||
| Ties: 1931, 1991 | ||||||
| Mar– 10-Month | 58.6°F (14.8°C) | 55.9°F (13.3°C) | 2.7°F | 122nd Coolest | Coolest since: | 1917 |
| 9th Warmest | Warmest since: | 2011 | ||||
| Feb– 11-Month | 56.8°F (13.8°C) | 53.6°F (12.0°C) | 3.2°F | 127th Coolest | Coolest since: | 1904 |
| 4th Warmest | Warmest since: | 2012, 2024 | ||||
| Ties: 2016 | ||||||
| Jan– 12-Month | 55.1°F (12.8°C) | 51.5°F (10.8°C) | 3.6°F | 127th Coolest | Coolest since: | 1904 |
| 4th Warmest | Warmest since: | 2012 | ||||
| Jul 2019– 18-Month | 56.4°F (13.6°C) | 53.2°F (11.8°C) | 3.2°F | 123rd Coolest | Coolest since: | 1904 |
| 7th Warmest | Warmest since: | 2012 | ||||
| Jan 2019– 24-Month | 54.6°F (12.6°C) | 51.5°F (10.8°C) | 3.1°F | 126th Coolest | Coolest since: | 1905 |
| 4th Warmest | Warmest since: | 2012, 2024 | ||||
| Ties: 2017 | ||||||
| Jan 2018– 36-Month | 54.3°F (12.4°C) | 51.5°F (10.8°C) | 2.8°F | 123rd Coolest | Coolest since: | 1905 |
| 6th Warmest | Warmest since: | 2012 | ||||
| Ties: 2013, 2017, 2018 | ||||||
| Jan 2017– 48-Month | 54.4°F (12.4°C) | 51.5°F (10.8°C) | 2.9°F | 125th Coolest | Coolest since: | 1907 |
| 3rd Warmest | Warmest to Date | 2023, 2024 | ||||
| Jan 2016– 60-Month | 54.4°F (12.4°C) | 51.5°F (10.8°C) | 2.9°F | 124th Coolest | Coolest since: | 1907 |
| 3rd Warmest | Warmest to Date | 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
