Westerville weather in September: Westerville, Ohio: normal highs, lows, rain and records for September
Westerville in September has a normal high of 79°F and a normal low of 56°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, 3.29 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 13°C, 84 mm of precipitation in September.
- NOAA stationWesterville
- Station IDUSC00338951
- Location40.13°N 82.94°W
- Elevation802 ft (244 m)
- From the center2 miles
- Population38,612
- Jan 38° 22°
- Feb 42° 24°
- Mar 53° 32°
- Apr 66° 42°
- May 76° 52°
- Jun 83° 61°
- Jul 86° 65°
- Aug 85° 63°
- Sep 79° 56°
- Oct 67° 45°
- Nov 53° 35°
- Dec 42° 27°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Westerville in September?
The normal high is 79°F and the normal low 56°F, for a daily mean of 67.6°F. September is 6.2°F cooler than August and 11.6°F warmer than October. September is the 4th warmest month of the year in Westerville 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 2.6°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 65°F and 70°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 | 83°F | 61°F | 29% | 19% |
| September 8 | 82°F | 59°F | 29% | 19% |
| September 15 | 80°F | 56°F | 29% | 19% |
| September 22 | 77°F | 54°F | 30% | 19% |
| September 30 | 74°F | 51°F | 31% | 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 | 61°F | 29% | 19% | 13 h 10 min |
| September 2 | 83°F | 60°F | 29% | 19% | 13 h |
| September 3 | 83°F | 60°F | 29% | 19% | 13 h |
| September 4 | 83°F | 60°F | 29% | 19% | 13 h |
| September 5 | 82°F | 60°F | 29% | 19% | 13 h |
| September 6 | 82°F | 59°F | 29% | 19% | 12 h 50 min |
| September 7 | 82°F | 59°F | 29% | 19% | 12 h 50 min |
| September 8 | 82°F | 59°F | 29% | 19% | 12 h 50 min |
| September 9 | 81°F | 58°F | 29% | 19% | 12 h 50 min |
| September 10 | 81°F | 58°F | 29% | 19% | 12 h 40 min |
| September 11 | 81°F | 58°F | 29% | 19% | 12 h 40 min |
| September 12 | 81°F | 57°F | 29% | 19% | 12 h 40 min |
| September 13 | 80°F | 57°F | 29% | 19% | 12 h 40 min |
| September 14 | 80°F | 57°F | 29% | 19% | 12 h 30 min |
| September 15 | 80°F | 56°F | 29% | 19% | 12 h 30 min |
| September 16 | 79°F | 56°F | 30% | 19% | 12 h 30 min |
| September 17 | 79°F | 56°F | 30% | 19% | 12 h 30 min |
| September 18 | 79°F | 55°F | 30% | 19% | 12 h 20 min |
| September 19 | 78°F | 55°F | 30% | 19% | 12 h 20 min |
| September 20 | 78°F | 55°F | 30% | 19% | 12 h 20 min |
| September 21 | 78°F | 54°F | 30% | 19% | 12 h 20 min |
| September 22 | 77°F | 54°F | 30% | 19% | 12 h 10 min |
| September 23 | 77°F | 53°F | 30% | 19% | 12 h 10 min |
| September 24 | 76°F | 53°F | 31% | 19% | 12 h 10 min |
| September 25 | 76°F | 53°F | 31% | 20% | 12 h 10 min |
| September 26 | 76°F | 52°F | 31% | 20% | 12 h |
| September 27 | 75°F | 52°F | 31% | 20% | 12 h |
| September 28 | 75°F | 51°F | 31% | 20% | 12 h |
| September 29 | 75°F | 51°F | 31% | 20% | 11 h 50 min |
| September 30 | 74°F | 51°F | 31% | 20% | 11 h 50 min |
- Normal high
- 79°FSeptember average
- Normal low
- 56°FSeptember average
- Precipitation
- 3.29 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 3
- 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
- 15
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00338951; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Westerville in September?
On a given September day the chance of 0.01 inch or more is 30% on average, highest around September 30 (31%). In all, 3.29 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Westerville, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00338951.
What are the records for September in Westerville?
The warmest September temperature on this station's record (since 1897) is 101°F, on September 2, 1953; the coldest is 29°F, on September 30, 1963. The wettest September brought 9.28 in (2018).
The September mean against the 1991-2020 normal of 67.6°F: 2021 68.8°F (+1.2), 2022 66.3°F (−1.3), 2023 66.8°F (−0.8), 2024 68.8°F (+1.2), 2025 67.9°F (+0.3), 2026 70.4°F (+2.8). 4 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 68.8°F | +1.2°F | 3.12 in |
| 2022 | 66.3°F | −1.3°F | 3.61 in |
| 2023 | 66.8°F | −0.8°F | 0.53 in |
| 2024 | 68.8°F | +1.2°F | 2.94 in |
| 2025 | 67.9°F | +0.3°F | 2.09 in |
| 2026 | 70.4°F | +2.8°F | 5.44 in |
Source: records: ACIS, station USC00338951; recent months: ACIS, station USC00338951. Records and recent months use complete months only.
How does September in Westerville compare across Ohio?
Across the 99 places PlainClimate covers in Ohio, September normal highs run from 73°F in Ashtabula to 81°F in Chilo; Westerville's is 79°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.