Chapel Hill weather in September: Chapel Hill, North Carolina: normal highs, lows, rain and records for September
Chapel Hill in September has a normal high of 82°F and a normal low of 62°F, a daily mean of 72°F, falling from 86°F on the 1st to 77°F by the 30th. Measurable precipitation falls on 12 days in a normal September, 4.41 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 17°C, 112 mm of precipitation in September.
- NOAA stationChapel Hill Williams Airport
- Station IDUSW00093785
- Location35.93°N 79.06°W
- Elevation512 ft (156 m)
- From the center1 miles
- Population64,028
- Jan 51° 32°
- Feb 55° 34°
- Mar 63° 40°
- Apr 72° 48°
- May 79° 57°
- Jun 86° 65°
- Jul 90° 69°
- Aug 88° 68°
- Sep 82° 62°
- Oct 72° 50°
- Nov 62° 40°
- Dec 54° 35°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Chapel Hill in September?
The normal high is 82°F and the normal low 62°F, for a daily mean of 72.0°F. September is 5.9°F cooler than August and 11.0°F warmer than October. September is the 4th warmest month of the year in Chapel Hill and the wettest. Across the month the normal high falls 9°F, from 86°F on September 1 to 77°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 42%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 86°F | 66°F | 39% | 21% |
| September 8 | 84°F | 65°F | 39% | 20% |
| September 15 | 82°F | 63°F | 40% | 21% |
| September 22 | 80°F | 60°F | 41% | 21% |
| September 30 | 77°F | 57°F | 41% | 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 | 86°F | 66°F | 39% | 21% | 13 h |
| September 2 | 86°F | 66°F | 39% | 21% | 13 h |
| September 3 | 85°F | 66°F | 39% | 21% | 12 h 50 min |
| September 4 | 85°F | 66°F | 39% | 21% | 12 h 50 min |
| September 5 | 85°F | 65°F | 39% | 21% | 12 h 50 min |
| September 6 | 85°F | 65°F | 39% | 21% | 12 h 50 min |
| September 7 | 84°F | 65°F | 39% | 20% | 12 h 50 min |
| September 8 | 84°F | 65°F | 39% | 20% | 12 h 40 min |
| September 9 | 84°F | 64°F | 39% | 20% | 12 h 40 min |
| September 10 | 84°F | 64°F | 39% | 20% | 12 h 40 min |
| September 11 | 83°F | 64°F | 39% | 20% | 12 h 40 min |
| September 12 | 83°F | 64°F | 40% | 20% | 12 h 30 min |
| September 13 | 83°F | 63°F | 40% | 20% | 12 h 30 min |
| September 14 | 83°F | 63°F | 40% | 20% | 12 h 30 min |
| September 15 | 82°F | 63°F | 40% | 21% | 12 h 30 min |
| September 16 | 82°F | 62°F | 40% | 21% | 12 h 30 min |
| September 17 | 82°F | 62°F | 40% | 21% | 12 h 20 min |
| September 18 | 81°F | 62°F | 41% | 21% | 12 h 20 min |
| September 19 | 81°F | 61°F | 41% | 21% | 12 h 20 min |
| September 20 | 81°F | 61°F | 41% | 21% | 12 h 20 min |
| September 21 | 80°F | 61°F | 41% | 21% | 12 h 10 min |
| September 22 | 80°F | 60°F | 41% | 21% | 12 h 10 min |
| September 23 | 80°F | 60°F | 41% | 21% | 12 h 10 min |
| September 24 | 79°F | 60°F | 42% | 21% | 12 h 10 min |
| September 25 | 79°F | 59°F | 42% | 21% | 12 h 10 min |
| September 26 | 79°F | 59°F | 42% | 21% | 12 h |
| September 27 | 78°F | 58°F | 42% | 21% | 12 h |
| September 28 | 78°F | 58°F | 42% | 21% | 12 h |
| September 29 | 78°F | 57°F | 41% | 20% | 12 h |
| September 30 | 77°F | 57°F | 41% | 20% | 11 h 50 min |
- Normal high
- 82°FSeptember average
- Normal low
- 62°FSeptember average
- Precipitation
- 4.41 inmonth total
- Days with precipitation
- 120.01 inch or more
- Days at 90°F or more
- 4
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 28
- Days at 80°F or more
- 19
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093785; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Chapel Hill in September?
On a given September day the chance of 0.01 inch or more is 40% on average, highest around September 25 (42%). In all, 4.41 in falls on 12 days of a normal September, 2 of them with an inch or more.
In a normal September in Chapel Hill, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093785.
How does September in Chapel Hill compare across North Carolina?
Across the 131 places PlainClimate covers in North Carolina, September normal highs run from 63°F in Beech Mountain to 87°F in Southport; Chapel Hill's is 82°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Chapel Hill in August88°F by day, 68°F at night
- Chapel Hill in October72°F by day, 50°F at night
- Chapel Hill through the yearEvery month, frost dates, records and recent years
- North Carolina in SeptemberThe statewide normal and the warmest and coolest places
- Southport: North Carolina's warmest Septembernormal high 87°F