Niagara Falls weather in September: Niagara Falls, New York: normal highs, lows, rain and records for September
Niagara Falls in September has a normal high of 73°F and a normal low of 52°F, a daily mean of 62°F, falling from 77°F on the 1st to 67°F by the 30th. Measurable precipitation falls on 11 days in a normal September, 3.27 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 11°C, 83 mm of precipitation in September.
- NOAA stationNiagara Falls International Airport
- Station IDUSW00004724
- Location43.11°N 78.95°W
- Elevation585 ft (178 m)
- From the center4 miles
- Population47,512
- Jan 32° 17°
- Feb 33° 17°
- Mar 41° 25°
- Apr 55° 34°
- May 68° 46°
- Jun 76° 56°
- Jul 81° 61°
- Aug 79° 60°
- Sep 73° 52°
- Oct 60° 42°
- Nov 47° 32°
- Dec 37° 24°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Niagara Falls in September?
The normal high is 73°F and the normal low 52°F, for a daily mean of 62.3°F. September is 7.1°F cooler than August and 11.7°F warmer than October. September is the 4th warmest month of the year in Niagara Falls and the 2nd wettest. Across the month the normal high falls 10°F, from 77°F on September 1 to 67°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 60°F and 65°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 43%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 77°F | 57°F | 32% | 19% |
| September 8 | 75°F | 55°F | 34% | 20% |
| September 15 | 73°F | 53°F | 36% | 21% |
| September 22 | 70°F | 50°F | 39% | 22% |
| September 30 | 67°F | 47°F | 43% | 25% |
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 | 77°F | 57°F | 32% | 19% | 13 h 10 min |
| September 2 | 77°F | 57°F | 33% | 19% | 13 h 10 min |
| September 3 | 77°F | 56°F | 33% | 19% | 13 h 10 min |
| September 4 | 76°F | 56°F | 33% | 19% | 13 h 10 min |
| September 5 | 76°F | 56°F | 33% | 19% | 13 h |
| September 6 | 76°F | 55°F | 33% | 19% | 13 h |
| September 7 | 76°F | 55°F | 33% | 20% | 13 h |
| September 8 | 75°F | 55°F | 34% | 20% | 12 h 50 min |
| September 9 | 75°F | 55°F | 34% | 20% | 12 h 50 min |
| September 10 | 75°F | 54°F | 34% | 20% | 12 h 50 min |
| September 11 | 74°F | 54°F | 35% | 20% | 12 h 50 min |
| September 12 | 74°F | 54°F | 35% | 21% | 12 h 40 min |
| September 13 | 74°F | 53°F | 35% | 21% | 12 h 40 min |
| September 14 | 73°F | 53°F | 35% | 21% | 12 h 40 min |
| September 15 | 73°F | 53°F | 36% | 21% | 12 h 30 min |
| September 16 | 73°F | 52°F | 36% | 21% | 12 h 30 min |
| September 17 | 72°F | 52°F | 36% | 21% | 12 h 30 min |
| September 18 | 72°F | 52°F | 37% | 22% | 12 h 30 min |
| September 19 | 72°F | 51°F | 37% | 22% | 12 h 20 min |
| September 20 | 71°F | 51°F | 38% | 22% | 12 h 20 min |
| September 21 | 71°F | 50°F | 38% | 22% | 12 h 20 min |
| September 22 | 70°F | 50°F | 39% | 22% | 12 h 10 min |
| September 23 | 70°F | 50°F | 39% | 23% | 12 h 10 min |
| September 24 | 69°F | 49°F | 40% | 23% | 12 h 10 min |
| September 25 | 69°F | 49°F | 40% | 23% | 12 h 10 min |
| September 26 | 69°F | 49°F | 41% | 24% | 12 h |
| September 27 | 68°F | 48°F | 42% | 24% | 12 h |
| September 28 | 68°F | 48°F | 42% | 24% | 12 h |
| September 29 | 67°F | 48°F | 43% | 25% | 11 h 50 min |
| September 30 | 67°F | 47°F | 43% | 25% | 11 h 50 min |
- Normal high
- 73°FSeptember average
- Normal low
- 52°FSeptember average
- Precipitation
- 3.27 inmonth total
- Days with precipitation
- 110.01 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
- 20
- Days at 80°F or more
- 7
- Sunshine
- 76%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00004724; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Niagara Falls in September?
On a given September day the chance of 0.01 inch or more is 37% on average, highest around September 30 (43%). In all, 3.27 in falls on 11 days of a normal September, 1 of them with an inch or more.
In a normal September in Niagara Falls, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00004724.
How humid and windy is Niagara Falls in September?
At 3 p.m. the normal temperature is 65°F with 58% relative humidity and a dew point of 49°F; at 6 a.m. it is 52°F with 87% humidity. The wind averages 8.8 mph, most often from the west-southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 52°F | 48°F | 87% | 6.8 mph | 51% |
| 9 a.m. | 59°F | 51°F | 75% | 9.8 mph | – |
| noon | 64°F | 50°F | 61% | 11.7 mph | 26% |
| 3 p.m. | 65°F | 49°F | 58% | 11.7 mph | – |
| 6 p.m. | 60°F | 50°F | 69% | 8.8 mph | 34% |
| 9 p.m. | 56°F | 49°F | 79% | 7.8 mph | 42% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00004724. 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 Niagara Falls?
The warmest September temperature on this station's record (since 1951) is 96°F, on September 3, 1953; the coldest is 30°F, on September 28, 1957. The wettest September brought 5.14 in (2006).
The September mean against the 1991-2020 normal of 62.3°F: 2021 66.3°F (+4.0), 2022 64.2°F (+1.9), 2023 65.9°F (+3.6), 2024 68.1°F (+5.8), 2025 64.5°F (+2.2), 2026 64.7°F (+2.4). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 66.3°F | +4.0°F | 2.23 in |
| 2022 | 64.2°F | +1.9°F | 1.67 in |
| 2023 | 65.9°F | +3.6°F | 1.38 in |
| 2024 | 68.1°F | +5.8°F | 2.11 in |
| 2025 | 64.5°F | +2.2°F | – |
| 2026 | 64.7°F | +2.4°F | – |
Source: records: ACIS, station USW00004724; recent months: ACIS, station USW00004724. Records and recent months use complete months only.
How does September in Niagara Falls 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; Niagara Falls's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Niagara Falls in August79°F by day, 60°F at night
- Niagara Falls in October60°F by day, 42°F at night
- Niagara Falls 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