Greenville weather in September: Greenville, South Carolina: normal highs, lows, rain and records for September
Greenville in September has a normal high of 83°F and a normal low of 62°F, a daily mean of 73°F, falling from 86°F on the 1st to 78°F by the 30th. Measurable precipitation falls on 8 days in a normal September, 3.73 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 17°C, 95 mm of precipitation in September.
- NOAA stationGrnvl Spart International Airport
- Station IDUSW00003870
- Location34.88°N 82.22°W
- Elevation940 ft (287 m)
- Population74,371
- Jan 53° 32°
- Feb 57° 35°
- Mar 64° 41°
- Apr 73° 49°
- May 80° 58°
- Jun 87° 66°
- Jul 90° 69°
- Aug 89° 68°
- Sep 83° 62°
- Oct 73° 50°
- Nov 63° 40°
- Dec 55° 35°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Greenville in September?
The normal high is 83°F and the normal low 62°F, for a daily mean of 72.5°F. September is 5.9°F cooler than August and 10.8°F warmer than October. September is the 4th warmest month of the year in Greenville and the 11th wettest. Across the month the normal high falls 8°F, from 86°F on September 1 to 78°F on September 30. From one year to the next September's mean temperature typically moves about 2.5°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 70°F and 75°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 | 86°F | 67°F | 30% | 18% |
| September 8 | 85°F | 65°F | 28% | 17% |
| September 15 | 83°F | 63°F | 26% | 16% |
| September 22 | 81°F | 60°F | 26% | 16% |
| September 30 | 78°F | 57°F | 25% | 16% |
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 | 86°F | 67°F | 30% | 18% | 13 h |
| September 2 | 86°F | 66°F | 30% | 18% | 12 h 50 min |
| September 3 | 86°F | 66°F | 29% | 18% | 12 h 50 min |
| September 4 | 86°F | 66°F | 29% | 18% | 12 h 50 min |
| September 5 | 86°F | 66°F | 29% | 17% | 12 h 50 min |
| September 6 | 85°F | 65°F | 28% | 17% | 12 h 50 min |
| September 7 | 85°F | 65°F | 28% | 17% | 12 h 40 min |
| September 8 | 85°F | 65°F | 28% | 17% | 12 h 40 min |
| September 9 | 85°F | 65°F | 27% | 17% | 12 h 40 min |
| September 10 | 84°F | 64°F | 27% | 17% | 12 h 40 min |
| September 11 | 84°F | 64°F | 27% | 17% | 12 h 40 min |
| September 12 | 84°F | 64°F | 27% | 16% | 12 h 30 min |
| September 13 | 84°F | 64°F | 27% | 16% | 12 h 30 min |
| September 14 | 83°F | 63°F | 26% | 16% | 12 h 30 min |
| September 15 | 83°F | 63°F | 26% | 16% | 12 h 30 min |
| September 16 | 83°F | 63°F | 26% | 16% | 12 h 20 min |
| September 17 | 83°F | 62°F | 26% | 16% | 12 h 20 min |
| September 18 | 82°F | 62°F | 26% | 16% | 12 h 20 min |
| September 19 | 82°F | 62°F | 26% | 16% | 12 h 20 min |
| September 20 | 82°F | 61°F | 26% | 16% | 12 h 20 min |
| September 21 | 81°F | 61°F | 26% | 16% | 12 h 10 min |
| September 22 | 81°F | 60°F | 26% | 16% | 12 h 10 min |
| September 23 | 81°F | 60°F | 25% | 16% | 12 h 10 min |
| September 24 | 80°F | 60°F | 25% | 16% | 12 h 10 min |
| September 25 | 80°F | 59°F | 25% | 16% | 12 h 10 min |
| September 26 | 80°F | 59°F | 25% | 16% | 12 h |
| September 27 | 79°F | 58°F | 25% | 16% | 12 h |
| September 28 | 79°F | 58°F | 25% | 16% | 12 h |
| September 29 | 79°F | 58°F | 25% | 16% | 12 h |
| September 30 | 78°F | 57°F | 25% | 16% | 11 h 50 min |
- Normal high
- 83°FSeptember average
- Normal low
- 62°FSeptember average
- Precipitation
- 3.73 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 5
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 29
- Days at 80°F or more
- 20
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00003870; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Greenville in September?
On a given September day the chance of 0.01 inch or more is 27% on average, highest around September 1 (30%). In all, 3.73 in falls on 8 days of a normal September, 1 of them with an inch or more.
In a normal September in Greenville, 5 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00003870.
How humid and windy is Greenville in September?
At 3 p.m. the normal temperature is 76°F with 50% relative humidity and a dew point of 56°F; at 6 a.m. it is 60°F with 88% humidity. The wind averages 6.0 mph, most often from the northeast in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 60°F | 56°F | 88% | 4.9 mph | 65% |
| 9 a.m. | 67°F | 58°F | 73% | 7.2 mph | 65% |
| noon | 74°F | 57°F | 56% | 8.0 mph | 61% |
| 3 p.m. | 76°F | 56°F | 50% | 7.9 mph | 65% |
| 6 p.m. | 71°F | 58°F | 62% | 6.0 mph | 71% |
| 9 p.m. | 65°F | 58°F | 76% | 4.6 mph | 68% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00003870. 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 Greenville?
The warmest September temperature on this station's record (since 1962) is 98°F, on September 2, 2011; the coldest is 36°F, on September 30, 1967. The wettest September brought 11.65 in (1975).
The September mean against the 1991-2020 normal of 72.5°F: 2021 71.7°F (−0.8), 2022 70.9°F (−1.6), 2023 72.9°F (+0.4), 2024 72.8°F (+0.3), 2025 71.2°F (−1.3), 2026 75.4°F (+2.9). 3 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 71.7°F | −0.8°F | 3.44 in |
| 2022 | 70.9°F | −1.6°F | 5.10 in |
| 2023 | 72.9°F | +0.4°F | 0.72 in |
| 2024 | 72.8°F | +0.3°F | 10.94 in |
| 2025 | 71.2°F | −1.3°F | 1.06 in |
| 2026 | 75.4°F | +2.9°F | 2.79 in |
Source: records: ACIS, station USW00003870; recent months: ACIS, station USW00003870. Records and recent months use complete months only.
How does September in Greenville compare across South Carolina?
Across the 73 places PlainClimate covers in South Carolina, September normal highs run from 71°F in Caesars Head to 87°F in Barnwell; Greenville's is 83°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Greenville in August89°F by day, 68°F at night
- Greenville in October73°F by day, 50°F at night
- Greenville through the yearEvery month, frost dates, records and recent years
- South Carolina in SeptemberThe statewide normal and the warmest and coolest places
- Barnwell: South Carolina's warmest Septembernormal high 87°F