Atlantic City weather in September: Atlantic City, New Jersey: normal highs, lows, rain and records for September
Atlantic City in September has a normal high of 79°F and a normal low of 58°F, a daily mean of 68°F, falling from 83°F on the 1st to 74°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 3.55 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 15°C, 90 mm of precipitation in September.
- NOAA stationAtlantic City International Airport
- Station IDUSW00093730
- Location39.45°N 74.57°W
- Elevation60 ft (18 m)
- From the center8 miles
- Population38,959
- Jan 43° 25°
- Feb 46° 26°
- Mar 53° 33°
- Apr 63° 42°
- May 73° 51°
- Jun 82° 61°
- Jul 87° 67°
- Aug 85° 65°
- Sep 79° 58°
- Oct 68° 46°
- Nov 57° 37°
- Dec 48° 29°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Atlantic City in September?
The normal high is 79°F and the normal low 58°F, for a daily mean of 68.4°F. September is 6.6°F cooler than August and 11.3°F warmer than October. September is the 4th warmest month of the year in Atlantic City and the 7th wettest. Across the month the normal high falls 9°F, from 83°F on September 1 to 74°F on September 30. From one year to the next September's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 66°F and 71°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 30%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 83°F | 63°F | 26% | 17% |
| September 8 | 81°F | 61°F | 26% | 17% |
| September 15 | 79°F | 59°F | 27% | 18% |
| September 22 | 77°F | 56°F | 29% | 19% |
| September 30 | 74°F | 53°F | 30% | 20% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 83°F | 63°F | 26% | 17% | 13 h 10 min |
| September 2 | 83°F | 62°F | 26% | 17% | 13 h |
| September 3 | 82°F | 62°F | 26% | 17% | 13 h |
| September 4 | 82°F | 62°F | 26% | 17% | 13 h |
| September 5 | 82°F | 62°F | 26% | 17% | 13 h |
| September 6 | 82°F | 61°F | 26% | 17% | 12 h 50 min |
| September 7 | 81°F | 61°F | 26% | 17% | 12 h 50 min |
| September 8 | 81°F | 61°F | 26% | 17% | 12 h 50 min |
| September 9 | 81°F | 61°F | 26% | 17% | 12 h 50 min |
| September 10 | 80°F | 60°F | 26% | 17% | 12 h 40 min |
| September 11 | 80°F | 60°F | 27% | 18% | 12 h 40 min |
| September 12 | 80°F | 60°F | 27% | 18% | 12 h 40 min |
| September 13 | 80°F | 59°F | 27% | 18% | 12 h 40 min |
| September 14 | 79°F | 59°F | 27% | 18% | 12 h 30 min |
| September 15 | 79°F | 59°F | 27% | 18% | 12 h 30 min |
| September 16 | 79°F | 58°F | 27% | 18% | 12 h 30 min |
| September 17 | 78°F | 58°F | 27% | 18% | 12 h 30 min |
| September 18 | 78°F | 58°F | 28% | 18% | 12 h 20 min |
| September 19 | 78°F | 57°F | 28% | 18% | 12 h 20 min |
| September 20 | 77°F | 57°F | 28% | 19% | 12 h 20 min |
| September 21 | 77°F | 57°F | 28% | 19% | 12 h 20 min |
| September 22 | 77°F | 56°F | 29% | 19% | 12 h 10 min |
| September 23 | 76°F | 56°F | 29% | 19% | 12 h 10 min |
| September 24 | 76°F | 55°F | 29% | 19% | 12 h 10 min |
| September 25 | 75°F | 55°F | 29% | 19% | 12 h 10 min |
| September 26 | 75°F | 55°F | 29% | 19% | 12 h |
| September 27 | 75°F | 54°F | 30% | 20% | 12 h |
| September 28 | 74°F | 54°F | 30% | 20% | 12 h |
| September 29 | 74°F | 53°F | 30% | 20% | 11 h 50 min |
| September 30 | 74°F | 53°F | 30% | 20% | 11 h 50 min |
- Normal high
- 79°FSeptember average
- Normal low
- 58°FSeptember average
- Precipitation
- 3.55 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 27
- Days at 80°F or more
- 13
- Sunshine
- 78%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093730; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Atlantic City in September?
On a given September day the chance of 0.01 inch or more is 28% on average, highest around September 29 (30%). In all, 3.55 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Atlantic City, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093730.
How humid and windy is Atlantic City in September?
At 3 p.m. the normal temperature is 71°F with 58% relative humidity and a dew point of 55°F; at 6 a.m. it is 57°F with 89% humidity. The wind averages 7.5 mph, most often from the south in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 57°F | 54°F | 89% | 5.5 mph | 65% |
| 9 a.m. | 66°F | 57°F | 72% | 9.4 mph | 63% |
| noon | 71°F | 55°F | 58% | 10.3 mph | 57% |
| 3 p.m. | 71°F | 55°F | 58% | 11.1 mph | 65% |
| 6 p.m. | 65°F | 56°F | 74% | 7.1 mph | 68% |
| 9 p.m. | 61°F | 56°F | 84% | 5.5 mph | 69% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00093730. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for September in Atlantic City?
The warmest September temperature on Atlantic City's official record (since 1943) is 99°F, on September 11, 1983; the coldest is 32°F, on September 24, 1967. The wettest September brought 8.54 in (2018).
The September mean against the 1991-2020 normal of 68.4°F: 2021 70.1°F (+1.7), 2022 68.2°F (−0.2), 2023 69.6°F (+1.2), 2024 68.4°F (at normal), 2025 69.1°F (+0.7), 2026 70.3°F (+1.9). 4 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 70.1°F | +1.7°F | 3.93 in |
| 2022 | 68.2°F | −0.2°F | 3.51 in |
| 2023 | 69.6°F | +1.2°F | 7.27 in |
| 2024 | 68.4°F | at normal | 0.56 in |
| 2025 | 69.1°F | +0.7°F | 4.36 in |
| 2026 | 70.3°F | +1.9°F | 5.85 in |
Source: records: ACIS, NWS threaded record ACYthr; recent months: ACIS, station USW00093730. Records and recent months use complete months only.
How does September in Atlantic City compare across New Jersey?
Across the 33 places PlainClimate covers in New Jersey, September normal highs run from 74°F in Andover to 80°F in Belleplain; Atlantic City's is 79°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Atlantic City in August85°F by day, 65°F at night
- Atlantic City in October68°F by day, 46°F at night
- Atlantic City through the yearEvery month, frost dates, records and recent years
- New Jersey in SeptemberThe statewide normal and the warmest and coolest places
- Belleplain: New Jersey's warmest Septembernormal high 80°F