NOAA's National Centers for Environmental Information
County Rankings
Chester County, Pennsylvania
December 1987 Average Temperature Rankings
| Period | Value | 1901-2000 Mean | Anomaly | Rank (1895-2025) | Coolest/Warmest Since | Record |
|---|---|---|---|---|---|---|
| December 1987 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 | ||||
| Nov– 2-Month | 40.2°F (4.6°C) | 37.4°F (3.0°C) | 2.8°F | 103rd Coolest | Coolest since: | 1917 |
| 28th Warmest | Warmest since: | 2015 | ||||
| Oct– 3-Month | 43.1°F (6.2°C) | 42.9°F (6.1°C) | 0.2°F | 61st Coolest | Coolest since: | 1917 |
| 70th Warmest | Warmest since: | 2015 | ||||
| Ties: 1951 | ||||||
| Sep– 4-Month | 48.8°F (9.3°C) | 48.4°F (9.1°C) | 0.4°F | 62nd Coolest | Coolest since: | 1917 |
| 69th Warmest | Warmest since: | 2015 | ||||
| Aug– 5-Month | 53.4°F (11.9°C) | 53.1°F (11.7°C) | 0.3°F | 61st Coolest | Coolest since: | 1917 |
| 70th Warmest | Warmest since: | 2015 | ||||
| Ties: 1932, 1939, 1965, 1977 | ||||||
| Jul– 6-Month | 57.3°F (14.1°C) | 56.6°F (13.7°C) | 0.7°F | 82nd Coolest | Coolest since: | 1917 |
| 49th Warmest | Warmest since: | 2015 | ||||
| Jun– 7-Month | 59.4°F (15.2°C) | 58.3°F (14.6°C) | 1.1°F | 93rd Coolest | Coolest since: | 1917 |
| 38th Warmest | Warmest since: | 2015 | ||||
| Ties: 1953, 1961, 1975 | ||||||
| May– 8-Month | 59.7°F (15.4°C) | 58.6°F (14.8°C) | 1.1°F | 92nd Coolest | Coolest since: | 1917 |
| 39th Warmest | Warmest since: | 2015 | ||||
| Apr– 9-Month | 58.7°F (14.8°C) | 57.7°F (14.3°C) | 1.0°F | 93rd Coolest | Coolest since: | 1917 |
| 38th Warmest | Warmest since: | 2015 | ||||
| Mar– 10-Month | 57.1°F (13.9°C) | 55.9°F (13.3°C) | 1.2°F | 99th Coolest | Coolest since: | 1917 |
| 32nd Warmest | Warmest since: | 2011 | ||||
| Feb– 11-Month | 54.6°F (12.6°C) | 53.6°F (12.0°C) | 1.0°F | 95th Coolest | Coolest since: | 1904 |
| 36th Warmest | Warmest since: | 2012, 2024 | ||||
| Jan– 12-Month | 52.5°F (11.4°C) | 51.5°F (10.8°C) | 1.0°F | 95th Coolest | Coolest since: | 1904 |
| 36th Warmest | Warmest since: | 2012 | ||||
| Ties: 1938, 1957 | ||||||
| Jul 1986– 18-Month | 53.9°F (12.2°C) | 53.2°F (11.8°C) | 0.7°F | 88th Coolest | Coolest since: | 1904 |
| 42nd Warmest | Warmest since: | 2012 | ||||
| Ties: 1919, 1939, 1957, 1971, 1986 | ||||||
| Jan 1986– 24-Month | 52.3°F (11.3°C) | 51.5°F (10.8°C) | 0.8°F | 92nd Coolest | Coolest since: | 1905 |
| 38th Warmest | Warmest since: | 2012, 2024 | ||||
| Ties: 1939, 1986 | ||||||
| Jan 1985– 36-Month | 52.3°F (11.3°C) | 51.5°F (10.8°C) | 0.8°F | 91st Coolest | Coolest since: | 1905 |
| 38th Warmest | Warmest since: | 2012 | ||||
| Jan 1984– 48-Month | 52.2°F (11.2°C) | 51.5°F (10.8°C) | 0.7°F | 90th Coolest | Coolest since: | 1907 |
| 38th Warmest | Warmest since: | 2023, 2024 | ||||
| Ties: 1932, 1949, 1953, 1986 | ||||||
| Jan 1983– 60-Month | 52.2°F (11.2°C) | 51.5°F (10.8°C) | 0.7°F | 89th Coolest | Coolest since: | 1907 |
| 38th Warmest | Warmest since: | 2024 | ||||
| Ties: 1933, 1954 | ||||||
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
