Newark weather in September: Newark, New Jersey: normal highs, lows, rain and records for September
Newark in September has a normal high of 78°F and a normal low of 61°F, a daily mean of 69°F, falling from 82°F on the 1st to 72°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 3.82 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 16°C, 97 mm of precipitation in September.
- NOAA stationNewark Liberty International Airport
- Station IDUSW00014734
- Location40.68°N 74.17°W
- Elevation7 ft (2 m)
- From the center3 miles
- Population317,303
- Jan 40° 26°
- Feb 43° 27°
- Mar 51° 34°
- Apr 63° 44°
- May 73° 54°
- Jun 82° 64°
- Jul 87° 69°
- Aug 85° 68°
- Sep 78° 61°
- Oct 66° 49°
- Nov 55° 39°
- Dec 45° 31°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Newark in September?
The normal high is 78°F and the normal low 61°F, for a daily mean of 69.2°F. September is 7.2°F cooler than August and 11.7°F warmer than October. September is the 4th warmest month of the year in Newark and the 8th wettest. Across the month the normal high falls 10°F, from 82°F on September 1 to 72°F on September 30. From one year to the next September's mean temperature typically moves about 2.0°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 67°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 31%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 82°F | 65°F | 28% | 18% |
| September 8 | 81°F | 63°F | 28% | 18% |
| September 15 | 78°F | 61°F | 28% | 18% |
| September 22 | 76°F | 59°F | 29% | 18% |
| September 30 | 72°F | 55°F | 31% | 19% |
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 | 82°F | 65°F | 28% | 18% | 13 h 10 min |
| September 2 | 82°F | 65°F | 28% | 18% | 13 h 10 min |
| September 3 | 82°F | 65°F | 28% | 18% | 13 h |
| September 4 | 82°F | 65°F | 28% | 18% | 13 h |
| September 5 | 81°F | 64°F | 28% | 18% | 13 h |
| September 6 | 81°F | 64°F | 28% | 18% | 13 h |
| September 7 | 81°F | 64°F | 28% | 18% | 12 h 50 min |
| September 8 | 81°F | 63°F | 28% | 18% | 12 h 50 min |
| September 9 | 80°F | 63°F | 27% | 18% | 12 h 50 min |
| September 10 | 80°F | 63°F | 27% | 18% | 12 h 50 min |
| September 11 | 80°F | 63°F | 28% | 18% | 12 h 40 min |
| September 12 | 79°F | 62°F | 28% | 18% | 12 h 40 min |
| September 13 | 79°F | 62°F | 28% | 18% | 12 h 40 min |
| September 14 | 79°F | 62°F | 28% | 18% | 12 h 30 min |
| September 15 | 78°F | 61°F | 28% | 18% | 12 h 30 min |
| September 16 | 78°F | 61°F | 28% | 18% | 12 h 30 min |
| September 17 | 77°F | 60°F | 28% | 18% | 12 h 30 min |
| September 18 | 77°F | 60°F | 28% | 18% | 12 h 20 min |
| September 19 | 77°F | 60°F | 29% | 18% | 12 h 20 min |
| September 20 | 76°F | 59°F | 29% | 18% | 12 h 20 min |
| September 21 | 76°F | 59°F | 29% | 18% | 12 h 20 min |
| September 22 | 76°F | 59°F | 29% | 18% | 12 h 10 min |
| September 23 | 75°F | 58°F | 30% | 18% | 12 h 10 min |
| September 24 | 75°F | 58°F | 30% | 19% | 12 h 10 min |
| September 25 | 74°F | 57°F | 30% | 19% | 12 h 10 min |
| September 26 | 74°F | 57°F | 30% | 19% | 12 h |
| September 27 | 73°F | 56°F | 30% | 19% | 12 h |
| September 28 | 73°F | 56°F | 31% | 19% | 12 h |
| September 29 | 73°F | 56°F | 31% | 19% | 11 h 50 min |
| September 30 | 72°F | 55°F | 31% | 19% | 11 h 50 min |
- Normal high
- 78°FSeptember average
- Normal low
- 61°FSeptember average
- Precipitation
- 3.82 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 2
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 26
- Days at 80°F or more
- 13
- Sunshine
- 76%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014734; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Newark in September?
On a given September day the chance of 0.01 inch or more is 29% on average, highest around September 29 (31%). In all, 3.82 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Newark, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014734.
How humid and windy is Newark in September?
At 3 p.m. the normal temperature is 71°F with 51% relative humidity and a dew point of 52°F; at 6 a.m. it is 58°F with 81% humidity. The wind averages 8.8 mph, most often from the west in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 58°F | 52°F | 81% | 7.7 mph | 39% |
| 9 a.m. | 64°F | 53°F | 67% | 9.5 mph | 36% |
| noon | 69°F | 52°F | 54% | 10.4 mph | 28% |
| 3 p.m. | 71°F | 52°F | 51% | 11.1 mph | 31% |
| 6 p.m. | 67°F | 52°F | 59% | 9.5 mph | 35% |
| 9 p.m. | 64°F | 53°F | 69% | 8.0 mph | 50% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014734. 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 Newark?
The warmest September temperature on Newark's official record (since 1843) is 105°F, on September 2, 1953; the coldest is 34°F, on September 23, 1904. The wettest September brought 17.66 in (1882).
The September mean against the 1991-2020 normal of 69.2°F: 2021 72.5°F (+3.3), 2022 69.7°F (+0.5), 2023 71.2°F (+2.0), 2024 69.8°F (+0.6), 2025 71.7°F (+2.5), 2026 69.9°F (+0.7). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 72.5°F | +3.3°F | 10.50 in |
| 2022 | 69.7°F | +0.5°F | 3.73 in |
| 2023 | 71.2°F | +2.0°F | 8.31 in |
| 2024 | 69.8°F | +0.6°F | 0.89 in |
| 2025 | 71.7°F | +2.5°F | 1.71 in |
| 2026 | 69.9°F | +0.7°F | 3.79 in |
Source: records: ACIS, NWS threaded record EWRthr; recent months: ACIS, station USW00014734. Records and recent months use complete months only.
How does September in Newark 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; Newark's is 78°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.