Florence weather in September: Florence, South Carolina: normal highs, lows, rain and records for September
Florence in September has a normal high of 85°F and a normal low of 66°F, a daily mean of 76°F, falling from 89°F on the 1st to 82°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 4.53 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 19°C, 115 mm of precipitation in September.
- NOAA stationFlorence Regional Airport
- Station IDUSW00013744
- Location34.19°N 79.72°W
- Elevation146 ft (45 m)
- Population40,923
- Jan 57° 36°
- Feb 61° 39°
- Mar 68° 44°
- Apr 77° 52°
- May 84° 61°
- Jun 89° 69°
- Jul 92° 72°
- Aug 90° 71°
- Sep 85° 66°
- Oct 77° 54°
- Nov 67° 44°
- Dec 59° 38°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Florence in September?
The normal high is 85°F and the normal low 66°F, for a daily mean of 75.6°F. September is 5.3°F cooler than August and 10.1°F warmer than October. September is the 4th warmest month of the year in Florence and the 4th wettest. Across the month the normal high falls 7°F, from 89°F on September 1 to 82°F on September 30. From one year to the next September's mean temperature typically moves about 2.1°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 74°F and 78°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 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 89°F | 70°F | 32% | 21% |
| September 8 | 87°F | 68°F | 30% | 20% |
| September 15 | 86°F | 66°F | 30% | 19% |
| September 22 | 84°F | 64°F | 29% | 19% |
| September 30 | 82°F | 61°F | 28% | 18% |
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 | 89°F | 70°F | 32% | 21% | 13 h |
| September 2 | 88°F | 69°F | 31% | 20% | 12 h 50 min |
| September 3 | 88°F | 69°F | 31% | 20% | 12 h 50 min |
| September 4 | 88°F | 69°F | 31% | 20% | 12 h 50 min |
| September 5 | 88°F | 69°F | 31% | 20% | 12 h 50 min |
| September 6 | 88°F | 69°F | 31% | 20% | 12 h 40 min |
| September 7 | 87°F | 68°F | 31% | 20% | 12 h 40 min |
| September 8 | 87°F | 68°F | 30% | 20% | 12 h 40 min |
| September 9 | 87°F | 68°F | 30% | 20% | 12 h 40 min |
| September 10 | 87°F | 68°F | 30% | 20% | 12 h 40 min |
| September 11 | 87°F | 67°F | 30% | 20% | 12 h 30 min |
| September 12 | 86°F | 67°F | 30% | 20% | 12 h 30 min |
| September 13 | 86°F | 67°F | 30% | 19% | 12 h 30 min |
| September 14 | 86°F | 67°F | 30% | 19% | 12 h 30 min |
| September 15 | 86°F | 66°F | 30% | 19% | 12 h 30 min |
| September 16 | 86°F | 66°F | 30% | 19% | 12 h 20 min |
| September 17 | 85°F | 66°F | 30% | 19% | 12 h 20 min |
| September 18 | 85°F | 65°F | 30% | 19% | 12 h 20 min |
| September 19 | 85°F | 65°F | 30% | 19% | 12 h 20 min |
| September 20 | 85°F | 65°F | 30% | 19% | 12 h 20 min |
| September 21 | 84°F | 64°F | 30% | 19% | 12 h 10 min |
| September 22 | 84°F | 64°F | 29% | 19% | 12 h 10 min |
| September 23 | 84°F | 64°F | 29% | 19% | 12 h 10 min |
| September 24 | 83°F | 63°F | 29% | 19% | 12 h 10 min |
| September 25 | 83°F | 63°F | 29% | 19% | 12 h 10 min |
| September 26 | 83°F | 63°F | 29% | 19% | 12 h |
| September 27 | 83°F | 62°F | 28% | 18% | 12 h |
| September 28 | 82°F | 62°F | 28% | 18% | 12 h |
| September 29 | 82°F | 62°F | 28% | 18% | 12 h |
| September 30 | 82°F | 61°F | 28% | 18% | 11 h 50 min |
- Normal high
- 85°FSeptember average
- Normal low
- 66°FSeptember average
- Precipitation
- 4.53 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 8
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 25
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013744; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Florence in September?
On a given September day the chance of 0.01 inch or more is 30% on average, highest around September 1 (32%). In all, 4.53 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Florence, 8 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013744.
How humid and windy is Florence in September?
At 3 p.m. the normal temperature is 80°F with 51% relative humidity and a dew point of 60°F; at 6 a.m. it is 63°F with 91% humidity. The wind averages 6.5 mph, most often from the northeast in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 63°F | 60°F | 91% | 5.3 mph | 64% |
| 9 a.m. | 70°F | 62°F | 74% | 8.0 mph | 66% |
| noon | 78°F | 61°F | 56% | 8.7 mph | 58% |
| 3 p.m. | 80°F | 60°F | 51% | 8.5 mph | 58% |
| 6 p.m. | 74°F | 62°F | 65% | 6.0 mph | 68% |
| 9 p.m. | 68°F | 62°F | 81% | 5.3 mph | 71% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013744. 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 Florence?
The warmest September temperature on this station's record (since 1948) is 101°F, on September 6, 1954; the coldest is 41°F, on September 25, 1950. The wettest September brought 11.34 in (2008).
The September mean against the 1991-2020 normal of 75.6°F: 2021 76.3°F (+0.7), 2022 75.0°F (−0.6), 2023 74.2°F (−1.4), 2024 76.9°F (+1.3), 2025 74.9°F (−0.7), 2026 77.1°F (+1.5). 3 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 76.3°F | +0.7°F | 2.41 in |
| 2022 | 75.0°F | −0.6°F | 6.19 in |
| 2023 | 74.2°F | −1.4°F | 2.28 in |
| 2024 | 76.9°F | +1.3°F | 7.55 in |
| 2025 | 74.9°F | −0.7°F | 2.54 in |
| 2026 | 77.1°F | +1.5°F | 0.96 in |
Source: records: ACIS, station USW00013744; recent months: ACIS, station USW00013744. Records and recent months use complete months only.
How does September in Florence 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; Florence's is 85°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Florence in August90°F by day, 71°F at night
- Florence in October77°F by day, 54°F at night
- Florence 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