Atlantic Weather in September
Average highs run from 89°F on September 1 to 83°F on September 30, and lows from 71°F to 65°F. Normal precipitation for the month is 7.12 in over about 11 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
- 69°F
- Precipitation
- 7.12 in
- Record high
- 99°FSep 3, 2020
- Record low
- 44°FSep 25, 1990
- Chance of a freeze
- 0%
- Days of 90°F or more
- 3.9
- Daylight
- 12 h 54 min to 11 h 52 min
- Cloud cover
- 55%
- Humidity
- 79%
- Dew point
- 69°F
- Wind
- 11.4 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 | 89°F | 71°F | 96°F 1993 | 59°F 2011 | 38% | 0% |
| Sep 2 | 89°F | 71°F | 95°F 2014 | 59°F 2008 | 38% | 0% |
| Sep 3 | 89°F | 71°F | 99°F 2020 | 59°F 2008 | 38% | 0% |
| Sep 4 | 89°F | 71°F | 96°F 2020 | 54°F 2011 | 38% | 0% |
| Sep 5 | 89°F | 71°F | 98°F 1983 | 54°F 2010 | 38% | 0% |
| Sep 6 | 89°F | 71°F | 95°F 1983 | 51°F 1997 | 38% | 0% |
| Sep 7 | 88°F | 71°F | 97°F 1983 | 59°F 1967 | 38% | 0% |
| Sep 8 | 88°F | 71°F | 94°F 2010 | 52°F 1976 | 37% | 0% |
| Sep 9 | 88°F | 70°F | 97°F 1978 | 58°F 1965 | 37% | 0% |
| Sep 10 | 88°F | 70°F | 94°F 1983 | 54°F 1958 | 37% | 0% |
| Sep 11 | 88°F | 70°F | 96°F 1983 | 51°F 1956 | 37% | 0% |
| Sep 12 | 87°F | 70°F | 94°F 1983 | 51°F 1976 | 36% | 0% |
| Sep 13 | 87°F | 70°F | 92°F 2008 | 53°F 2011 | 36% | 0% |
| Sep 14 | 87°F | 69°F | 93°F 2010 | 53°F 2011 | 36% | 0% |
| Sep 15 | 87°F | 69°F | 94°F 2008 | 50°F 1964 | 36% | 0% |
| Sep 16 | 87°F | 69°F | 93°F 1956 | 53°F 1964 | 36% | 0% |
| Sep 17 | 86°F | 69°F | 93°F 1958 | 56°F 2011 | 35% | 0% |
| Sep 18 | 86°F | 69°F | 95°F 1958 | 56°F 2011 | 35% | 0% |
| Sep 19 | 86°F | 68°F | 96°F 1978 | 46°F 1990 | 35% | 0% |
| Sep 20 | 86°F | 68°F | 91°F 2017 | 49°F 1984 | 35% | 0% |
| Sep 21 | 85°F | 68°F | 90°F 2017 | 56°F 1996 | 35% | 0% |
| Sep 22 | 85°F | 67°F | 90°F 1980 | 50°F 2012 | 35% | 0% |
| Sep 23 | 85°F | 67°F | 93°F 1980 | 51°F 1976 | 34% | 0% |
| Sep 24 | 85°F | 67°F | 91°F 1986 | 47°F 1983 | 34% | 0% |
| Sep 25 | 85°F | 66°F | 95°F 1986 | 44°F 1990 | 34% | 0% |
| Sep 26 | 84°F | 66°F | 94°F 1986 | 46°F 2012 | 33% | 0% |
| Sep 27 | 84°F | 66°F | 94°F 1986 | 50°F 2012 | 33% | 0% |
| Sep 28 | 84°F | 65°F | 92°F 2017 | 50°F 2012 | 33% | 0% |
| Sep 29 | 84°F | 65°F | 90°F 2017 | 53°F 1956 | 32% | 0% |
| Sep 30 | 83°F | 65°F | 90°F 1986 | 46°F 1970 | 32% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- September 1
- sunrise 6:38 AM, sunset 7:32 PM
- September 30
- sunrise 6:59 AM, sunset 6:51 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00311606 (Cedar Is), public domain. Records: NOAA GHCN-Daily, station USC00311606, 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.