NOAA's National Centers for Environmental Information
County Rankings
Chester County, Pennsylvania
December 1998 Average Temperature Rankings
| Period | Value | 1901-2000 Mean | Anomaly | Rank (1895-2025) | Coolest/Warmest Since | Record |
|---|---|---|---|---|---|---|
| December 1998 1-Month | 39.2°F (4.0°C) | 32.3°F (0.2°C) | 6.9°F | 122nd Coolest | Coolest since: | 1989 |
| 9th Warmest | Warmest since: | 2015 | ||||
| Ties: 1982 | ||||||
| Nov– 2-Month | 41.9°F (5.5°C) | 37.4°F (3.0°C) | 4.5°F | 120th Coolest | Coolest since: | 1917 |
| 11th Warmest | Warmest since: | 2015 | ||||
| Oct– 3-Month | 46.1°F (7.8°C) | 42.9°F (6.1°C) | 3.2°F | 113th Coolest | Coolest since: | 1917 |
| 18th Warmest | Warmest since: | 2015 | ||||
| Ties: 1941, 1946 | ||||||
| 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 | ||||
| Aug– 5-Month | 56.3°F (13.5°C) | 53.1°F (11.7°C) | 3.2°F | 121st Coolest | Coolest since: | 1917 |
| 10th Warmest | Warmest since: | 2015 | ||||
| Jul– 6-Month | 59.3°F (15.2°C) | 56.6°F (13.7°C) | 2.7°F | 116th Coolest | Coolest since: | 1917 |
| 15th Warmest | Warmest since: | 2015 | ||||
| Jun– 7-Month | 60.7°F (15.9°C) | 58.3°F (14.6°C) | 2.4°F | 115th Coolest | Coolest since: | 1917 |
| 16th Warmest | Warmest since: | 2015 | ||||
| May– 8-Month | 61.2°F (16.2°C) | 58.6°F (14.8°C) | 2.6°F | 119th Coolest | Coolest since: | 1917 |
| 12th Warmest | Warmest since: | 2015 | ||||
| Apr– 9-Month | 60.2°F (15.7°C) | 57.7°F (14.3°C) | 2.5°F | 121st Coolest | Coolest since: | 1917 |
| 10th Warmest | Warmest to Date | 2015 | ||||
| Mar– 10-Month | 58.5°F (14.7°C) | 55.9°F (13.3°C) | 2.6°F | 121st Coolest | Coolest since: | 1917 |
| 10th Warmest | Warmest to Date | 2011 | ||||
| Feb– 11-Month | 56.7°F (13.7°C) | 53.6°F (12.0°C) | 3.1°F | 125th Coolest | Coolest since: | 1904 |
| 6th Warmest | Warmest to Date | 2012, 2024 | ||||
| Jan– 12-Month | 55.2°F (12.9°C) | 51.5°F (10.8°C) | 3.7°F | 128th Coolest | Coolest since: | 1904 |
| 3rd Warmest | Warmest to Date | 2012 | ||||
| Jul 1997– 18-Month | 55.7°F (13.2°C) | 53.2°F (11.8°C) | 2.5°F | 115th Coolest | Coolest since: | 1904 |
| 15th Warmest | Warmest since: | 2012 | ||||
| Jan 1997– 24-Month | 53.5°F (11.9°C) | 51.5°F (10.8°C) | 2.0°F | 112th Coolest | Coolest since: | 1905 |
| 18th Warmest | Warmest since: | 2012, 2024 | ||||
| Jan 1996– 36-Month | 52.8°F (11.6°C) | 51.5°F (10.8°C) | 1.3°F | 102nd Coolest | Coolest since: | 1905 |
| 27th Warmest | Warmest since: | 2012 | ||||
| Jan 1995– 48-Month | 52.7°F (11.5°C) | 51.5°F (10.8°C) | 1.2°F | 98th Coolest | Coolest since: | 1907 |
| 30th Warmest | Warmest since: | 2023, 2024 | ||||
| Jan 1994– 60-Month | 52.5°F (11.4°C) | 51.5°F (10.8°C) | 1.0°F | 97th Coolest | Coolest since: | 1907 |
| 30th Warmest | Warmest since: | 2024 | ||||
| Ties: 1953, 1992 | ||||||
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
