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A ridge of high pressure will be over Pennsylvania today. A weak cold front will push south across the state on Sunday, followed by a large high pressure system for most of next week.
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| Daily Records for September 20th for Both Sites. | | Town | Date
MM-DD | Record Max | Record Max Year(s) | Record Min | Record Min Year(s) | Record Precip | Record Precip Year(s) | Record Snowfall | Record Snowfall Year(s) | | Williamsport | 09-20 | 90 | 1895 | 34 | 1929 | 1.62 | 1977 | 0 | 2002 2001 | | Harrisburg | 09-20 | 93 | 1895 | 37 | 1979 | 1.45 | 1938 | 0 | 2002 2001 |
| Daily Normals for September 20th for Both Sites. | | Town | Date
MM-DD | Normal Max | Normal Mean | Normal Min | Normal Precip | Normal Snowfall | Normal HDDs | Normal CDDs | | Williamsport | 09-20 | 72 | 62 | 51 | 0.14 | 0 | 5 | 2 | | Harrisburg | 09-20 | 74 | 65 | 55 | 0.12 | 0 | 2 | 2 |
| Town | Month | Day | Sunrise | Sunset | Time Zone | | Williamsport | September | 20 | 6:54 AM | 7:08 PM | EDT | | Harrisburg | September | 20 | 6:54 AM | 7:07 PM | EDT |
See/Get more records and normals on our local Climate Page
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Big whirls have little whirls what feed on their velocity, little whirls have smaller whirls, and so on to viscosity.
-- L.F. Richardson
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