Arlington Weather in September
Average highs run from 89°F on September 1 to 84°F on September 30, and lows from 69°F to 61°F. Normal precipitation for the month is 4.30 in over about 10 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
- 87°F
- Average low
- 65°F
- Precipitation
- 4.30 in
- Record high
- 102°FSep 13, 2010
- Record low
- 46°FSep 26, 2001
- Chance of a freeze
- 0%
- Days of 90°F or more
- 11.1
- Daylight
- 12 h 47 min to 11 h 53 min
- Cloud cover
- 48%
- Humidity
- 72%
- Dew point
- 66°F
- Wind
- 7.6 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 89°F | 69°F | 99°F 2011 | 70°F 2001 | 38% |
| Sep 2 | 89°F | 69°F | 99°F 2011 | 62°F 2025 | 38% |
| Sep 3 | 89°F | 69°F | 99°F 2011 | 64°F 2025 | 37% |
| Sep 4 | 88°F | 68°F | 98°F 2010 | 67°F 2025 | 37% |
| Sep 5 | 88°F | 68°F | 96°F 2006 | 66°F 2021 | 36% |
| Sep 6 | 88°F | 68°F | 96°F 2008 | 66°F 2010 | 36% |
| Sep 7 | 88°F | 68°F | 98°F 2010 | 56°F 2011 | 36% |
| Sep 8 | 88°F | 67°F | 98°F 2010 | 59°F 2011 | 35% |
| Sep 9 | 88°F | 67°F | 98°F 2019 | 58°F 2011 | 35% |
| Sep 10 | 88°F | 67°F | 99°F 2010 | 59°F 2011 | 34% |
| Sep 11 | 88°F | 67°F | 101°F 2010 | 58°F 2011 | 34% |
| Sep 12 | 88°F | 66°F | 101°F 2010 | 54°F 2017 | 34% |
| Sep 13 | 87°F | 66°F | 102°F 2010 | 59°F 2015 | 33% |
| Sep 14 | 87°F | 66°F | 99°F 2010 | 53°F 2001 | 33% |
| Sep 15 | 87°F | 66°F | 99°F 2010 | 53°F 2001 | 33% |
| Sep 16 | 87°F | 65°F | 96°F 2010 | 52°F 2001 | 32% |
| Sep 17 | 87°F | 65°F | 95°F 2005 | 58°F 2001 | 32% |
| Sep 18 | 87°F | 65°F | 99°F 2010 | 62°F 2023 | 32% |
| Sep 19 | 86°F | 64°F | 100°F 2010 | 59°F 2023 | 31% |
| Sep 20 | 86°F | 64°F | 100°F 2010 | 59°F 2006 | 31% |
| Sep 21 | 86°F | 64°F | 102°F 2010 | 59°F 2006 | 31% |
| Sep 22 | 86°F | 63°F | 100°F 2010 | 59°F 2020 | 30% |
| Sep 23 | 86°F | 63°F | 99°F 2010 | 55°F 2021 | 30% |
| Sep 24 | 86°F | 63°F | 99°F 2016 | 54°F 2021 | 30% |
| Sep 25 | 85°F | 62°F | 99°F 2010 | 51°F 2001 | 29% |
| Sep 26 | 85°F | 62°F | 97°F 2019 | 46°F 2001 | 29% |
| Sep 27 | 85°F | 62°F | 95°F 2011 | 49°F 2001 | 29% |
| Sep 28 | 85°F | 61°F | 99°F 2019 | 49°F 2001 | 28% |
| Sep 29 | 84°F | 61°F | 96°F 2017 | 48°F 2001 | 28% |
| Sep 30 | 84°F | 61°F | 96°F 2017 | 46°F 2001 | 28% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- September 1
- sunrise 7:15 AM, sunset 8:02 PM
- September 30
- sunrise 7:32 AM, sunset 7:25 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00063828 (Newton 8 W), public domain. Records: NOAA GHCN-Daily, station USC00092738, 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.