Plattsburgh weather in September: Plattsburgh, New York: normal highs, lows, rain and records for September
Plattsburgh in September has a normal high of 71°F and a normal low of 49°F, a daily mean of 60°F, falling from 76°F on the 1st to 64°F by the 30th. Measurable precipitation falls on 12 days in a normal September, 3.11 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 22°C and low of 9°C, 79 mm of precipitation in September.
- NOAA stationPlattsburgh International Airport
- Station IDUSW00064776
- Location44.65°N 73.47°W
- Elevation234 ft (71 m)
- From the center3 miles
- Population19,758
- Jan 28° 10°
- Feb 31° 11°
- Mar 40° 21°
- Apr 54° 33°
- May 68° 44°
- Jun 75° 53°
- Jul 81° 59°
- Aug 79° 57°
- Sep 71° 49°
- Oct 58° 38°
- Nov 46° 29°
- Dec 34° 19°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Plattsburgh in September?
The normal high is 71°F and the normal low 49°F, for a daily mean of 59.7°F. September is 8.0°F cooler than August and 11.7°F warmer than October. September is the 4th warmest month of the year in Plattsburgh and the 4th wettest. Across the month the normal high falls 12°F, from 76°F on September 1 to 64°F on September 30. From one year to the next September's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 57°F and 62°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 42%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 76°F | 53°F | 38% | 18% |
| September 8 | 74°F | 51°F | 38% | 18% |
| September 15 | 71°F | 49°F | 38% | 19% |
| September 22 | 68°F | 47°F | 40% | 20% |
| September 30 | 64°F | 44°F | 42% | 21% |
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 | 76°F | 53°F | 38% | 18% | 13 h 20 min |
| September 2 | 76°F | 53°F | 38% | 18% | 13 h 20 min |
| September 3 | 76°F | 53°F | 38% | 18% | 13 h 10 min |
| September 4 | 75°F | 52°F | 38% | 18% | 13 h 10 min |
| September 5 | 75°F | 52°F | 38% | 18% | 13 h 10 min |
| September 6 | 75°F | 52°F | 38% | 18% | 13 h |
| September 7 | 74°F | 51°F | 38% | 18% | 13 h |
| September 8 | 74°F | 51°F | 38% | 18% | 13 h |
| September 9 | 74°F | 51°F | 38% | 19% | 12 h 50 min |
| September 10 | 73°F | 51°F | 38% | 19% | 12 h 50 min |
| September 11 | 73°F | 50°F | 38% | 19% | 12 h 50 min |
| September 12 | 72°F | 50°F | 38% | 19% | 12 h 50 min |
| September 13 | 72°F | 50°F | 38% | 19% | 12 h 40 min |
| September 14 | 72°F | 49°F | 38% | 19% | 12 h 40 min |
| September 15 | 71°F | 49°F | 38% | 19% | 12 h 40 min |
| September 16 | 71°F | 49°F | 38% | 19% | 12 h 30 min |
| September 17 | 70°F | 48°F | 39% | 19% | 12 h 30 min |
| September 18 | 70°F | 48°F | 39% | 19% | 12 h 30 min |
| September 19 | 70°F | 48°F | 39% | 19% | 12 h 20 min |
| September 20 | 69°F | 47°F | 39% | 19% | 12 h 20 min |
| September 21 | 69°F | 47°F | 40% | 20% | 12 h 20 min |
| September 22 | 68°F | 47°F | 40% | 20% | 12 h 10 min |
| September 23 | 68°F | 46°F | 40% | 20% | 12 h 10 min |
| September 24 | 67°F | 46°F | 41% | 20% | 12 h 10 min |
| September 25 | 67°F | 46°F | 41% | 21% | 12 h 10 min |
| September 26 | 66°F | 45°F | 41% | 21% | 12 h |
| September 27 | 66°F | 45°F | 41% | 21% | 12 h |
| September 28 | 65°F | 45°F | 42% | 21% | 12 h |
| September 29 | 65°F | 44°F | 42% | 21% | 11 h 50 min |
| September 30 | 64°F | 44°F | 42% | 21% | 11 h 50 min |
- Normal high
- 71°FSeptember average
- Normal low
- 49°FSeptember average
- Precipitation
- 3.11 inmonth total
- Days with precipitation
- 120.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 13 h 20 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 18
- Days at 80°F or more
- 5
- Sunshine
- 75%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00064776; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Plattsburgh in September?
On a given September day the chance of 0.01 inch or more is 39% on average, highest around September 30 (42%). In all, 3.11 in falls on 12 days of a normal September, 1 of them with an inch or more.
In a normal September in Plattsburgh, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00064776.
What are the records for September in Plattsburgh?
The warmest September temperature on Plattsburgh's official record (since 1945) is 95°F, on September 5, 1959; the coldest is 25°F, on September 29, 2000. The wettest September brought 9.41 in (1977).
The September mean against the 1991-2020 normal of 59.7°F: 2021 61.7°F (+2.0), 2022 59.5°F (−0.2), 2023 62.5°F (+2.8), 2024 64.5°F (+4.8), 2025 61.5°F (+1.8), 2026 60.5°F (+0.8). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 61.7°F | +2.0°F | 3.25 in |
| 2022 | 59.5°F | −0.2°F | 2.78 in |
| 2023 | 62.5°F | +2.8°F | 2.73 in |
| 2024 | 64.5°F | +4.8°F | 1.70 in |
| 2025 | 61.5°F | +1.8°F | 2.27 in |
| 2026 | 60.5°F | +0.8°F | 1.68 in |
Source: records: ACIS, NWS threaded record PBGthr; recent months: ACIS, station USW00064776. Records and recent months use complete months only.
How does September in Plattsburgh compare across New York?
Across the 131 places PlainClimate covers in New York, September normal highs run from 64°F in Cooperstown to 78°F in Wantagh; Plattsburgh's is 71°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Plattsburgh in August79°F by day, 57°F at night
- Plattsburgh in October58°F by day, 38°F at night
- Plattsburgh through the yearEvery month, frost dates, records and recent years
- New York in SeptemberThe statewide normal and the warmest and coolest places
- Wantagh: New York's warmest Septembernormal high 78°F