Annual mean
Annual mean of daily highs
Annual mean of daily lows
Jefferson borough, Pennsylvania
Official LSAD Designation: Jefferson borough • Census GEOID: 4237944
• York County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Jefferson borough.
Reference Weather Station: MILLERS 4 NE, MD US (ID: USC00185934)
• Located 6.8 miles from community center
• Elevation: 262.1 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 39.5° | 23.7° | 31.6° | 3.58" |
| February | 42.9° | 25.3° | 34.1° | 2.94" |
| March | 51.8° | 31.9° | 41.8° | 4.14" |
| April | 64.5° | 41.8° | 53.2° | 3.84" |
| May | 73.2° | 51.3° | 62.3° | 3.96" |
| June | 80.8° | 60.0° | 70.4° | 3.80" |
| July | 84.9° | 64.4° | 74.6° | 4.73" |
| August | 83.1° | 62.6° | 72.9° | 4.19" |
| September | 76.7° | 56.3° | 66.5° | 5.11" |
| October | 65.4° | 45.4° | 55.4° | 4.19" |
| November | 53.9° | 35.9° | 44.9° | 3.36" |
| December | 43.7° | 28.4° | 36.1° | 4.04" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station MILLERS 4 NE, MD US (ID: USC00185934) • 6.8 miles from community center .
This is the same reference station used for monthly normals.
Source: NOAA NCEI Global Summary of the Year.
Annual temperature data table (°F)
| Year | Annual mean (°F) | Annual mean of daily highs (°F) | Annual mean of daily lows (°F) |
|---|---|---|---|
| 2010 | 54.1 | 63.8 | 44.3 |
| 2011 | 55.0 | 64.7 | 45.2 |
| 2012 | 56.0 | 66.0 | 46.1 |
| 2013 | 52.8 | 62.2 | 43.4 |
| 2014 | 51.6 | 61.4 | 41.9 |
| 2015 | 54.1 | 63.9 | 44.4 |
| 2016 | 54.8 | 64.3 | 45.3 |
| 2017 | 54.9 | 64.3 | 45.5 |
| 2018 | 54.0 | 62.7 | 45.2 |
| 2019 | 54.5 | 64.0 | 44.9 |
| 2020 | 55.4 | 65.0 | 45.9 |
| 2021 | 55.0 | 64.3 | 45.8 |
| 2022 | 53.9 | 63.8 | 44.1 |
| 2023 | 55.7 | 65.9 | 45.5 |
| 2024 | 56.0 | 65.9 | 46.2 |
| 2025 | 54.0 | 63.8 | 44.2 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.