Lancaster Weather in September
Average highs run from 84°F on September 1 to 76°F on September 30, and lows from 64°F to 55°F. Normal precipitation for the month is 4.15 in over about 9 wet days.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 80°F
- Average low
- 60°F
- Precipitation
- 4.15 in
- Record high
- 93°FSep 2, 2010
- Record low
- 49°FSep 22, 2006
- Chance of a freeze
- 0%
- Days of 90°F or more
- 4.1
- Daylight
- 12 h 59 min to 11 h 49 min
- Cloud cover
- 53%
- Humidity
- 75%
- Dew point
- 64°F
- Wind
- 9.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Sep 1 | 84°F | 64°F | 92°F 2010 | 59°F 2011 | 28% | 0% |
| Sep 2 | 84°F | 64°F | 93°F 2010 | 57°F 2017 | 28% | 0% |
| Sep 3 | 84°F | 63°F | 93°F 2014 | 59°F 2008 | 28% | 0% |
| Sep 4 | 84°F | 63°F | 93°F 2026 | 60°F 2007 | 28% | 0% |
| Sep 5 | 83°F | 63°F | 90°F 2002 | 57°F 2010 | 28% | 0% |
| Sep 6 | 83°F | 63°F | 91°F 2023 | 57°F 2010 | 28% | 0% |
| Sep 7 | 83°F | 63°F | 93°F 2023 | 58°F 2002 | 28% | 0% |
| Sep 8 | 83°F | 62°F | 88°F 2018 | 56°F 2017 | 28% | 0% |
| Sep 9 | 82°F | 62°F | 88°F 2016 | 54°F 2024 | 28% | 0% |
| Sep 10 | 82°F | 62°F | 91°F 2016 | 53°F 2017 | 28% | 0% |
| Sep 11 | 82°F | 62°F | 88°F 2007 | 55°F 2012 | 28% | 0% |
| Sep 12 | 82°F | 61°F | 91°F 2007 | 52°F 2012 | 28% | 0% |
| Sep 13 | 81°F | 61°F | 88°F 2021 | 52°F 2012 | 28% | 0% |
| Sep 14 | 81°F | 61°F | 88°F 2008 | 52°F 2015 | 28% | 0% |
| Sep 15 | 81°F | 60°F | 89°F 2008 | 52°F 2015 | 28% | 0% |
| Sep 16 | 80°F | 60°F | 86°F 2005 | 53°F 2012 | 28% | 0% |
| Sep 17 | 80°F | 60°F | 89°F 2010 | 54°F 2007 | 28% | 0% |
| Sep 18 | 80°F | 59°F | 90°F 2005 | 54°F 2007 | 28% | 0% |
| Sep 19 | 80°F | 59°F | 87°F 2022 | 55°F 2010 | 29% | 0% |
| Sep 20 | 79°F | 59°F | 87°F 2022 | 52°F 2009 | 29% | 0% |
| Sep 21 | 79°F | 58°F | 89°F 2022 | 50°F 2006 | 29% | 0% |
| Sep 22 | 79°F | 58°F | 83°F 2017 | 49°F 2006 | 29% | 0% |
| Sep 23 | 78°F | 58°F | 91°F 2010 | 50°F 2006 | 29% | 0% |
| Sep 24 | 78°F | 57°F | 90°F 2005 | 49°F 2012 | 30% | 0% |
| Sep 25 | 78°F | 57°F | 92°F 2010 | 50°F 2012 | 30% | 0% |
| Sep 26 | 77°F | 56°F | 91°F 2010 | 50°F 2012 | 30% | 0% |
| Sep 27 | 77°F | 56°F | 86°F 2007 | 54°F 2006 | 30% | 0% |
| Sep 28 | 77°F | 56°F | 87°F 2002 | 50°F 2022 | 30% | 0% |
| Sep 29 | 76°F | 55°F | 83°F 2017 | 55°F 2007 | 30% | 0% |
| Sep 30 | 76°F | 55°F | 81°F 2015 | 49°F 2006 | 30% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- September 1
- sunrise 6:36 AM, sunset 7:35 PM
- September 30
- sunrise 7:01 AM, sunset 6:50 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00448894 (Warsaw 2 Nw), public domain. Records: NOAA GHCN-Daily, station USC00446161, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.