Durham, NC weather in September
In September, Durham sees highs around 83°F and lows around 63°F: warm and often humid, with some rain. Expect about 9 wet days.
- Normal high
- 83°F
- Normal low
- 63°F
- Wet days
- 9
- 5.2 in total
- Muggy days
- 13
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 86°F | 78°F |
| Normal low | 67°F | 57°F |
| Chance of a wet day | 30% | 28% |
| Sunrise / sunset | 6:47 am / 7:43 pm | 7:09 am / 7:01 pm |
| Daylight | 12.9 h | 11.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical September day
- 6 am64°Fdew point 62°F
- 9 am72°Fdew point 63°F
- Noon78°Fdew point 62°F
- 3 pm80°Fdew point 62°F
- 6 pm76°Fdew point 63°F
- 9 pm69°Fdew point 63°F
NOAA hourly normals (local standard time) from Raleigh Durham Intl Airport (10 mi away); average wind 6 mph; clear or few clouds in 47% of daytime hours, mostly cloudy or overcast in 38%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F6 of 30
- Hot dayshigh 90°F or more5 of 30
- Muggy daysdaily mean dew point 65°F or more13 of 30
- Wet daysat least 0.01 in of rain or melted snow9 of 30
- Notable rainat least 0.10 in6 of 30
- Freezing nightslow 32°F or below0 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 5.2 in; a dry September brings about 2.6 in and a wet one about 5.8 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 2 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202010: average high 89°F
- Coolest September2000: average high 78°F
- Wettest September1999: 21.8 in
- Driest September2005: 0.8 in
- Highest reading101°F (September 10, 2007)
- Lowest reading41°F (September 26, 2001)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 89°F | 83°F | 73°F |
| Normal low | 69°F | 63°F | 50°F |
| Wet days | 11 | 9 | 8 |
| Comfortable days | 1 | 6 | 17 |
| Daylight | 13.5 h | 12.4 h | 11.3 h |
Highs change by -6°F from August and -10°F into October.
Nearby alternatives in September
- Warmer: Columbia, SC183 mi · high 89°F · 8 wet days
- Cooler: Fayetteville, WV187 mi · high 76°F · 9 wet days
How Durham ranks in September
- Normal high174th warmest of 378 cities; 5th of 10 in North Carolina
- Wet days250th driest of 378
- Comfortable days190th most of 342
What to pack for Durham in September
- A rain jacket or umbrella – rain on about 9 days
Heating and cooling
September has 15 heating degree days and 243 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How hot is Durham in September?
The normal high is 83°F and the normal low is 63°F. From 1991 to 2020 the hottest September reading was 101°F (September 10, 2007).
Does it rain a lot in Durham in September?
About 9 days in September have at least 0.01 in of precipitation, and the normal total is 5.2 in. The wettest September in 1991-2020 was in 1999 (21.8 in); the driest was in 2005 (0.8 in).
Is September a good time to visit Durham?
September ranks 6th of 12 months on our comfort score for Durham (54 out of 100). It has about 6 comfortable days and about 5 days at 90°F or hotter. The best month is April.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates and humidity and wind by hour: Raleigh Durham Intl Airport (USW00013722), 9.6 mi SE of the city center, 416 ft . NOAA normals and daily records, 1991-2020.
- Cloud cover: Pope AFB (USW00013714), 57 mi S of the city center, 218 ft (177 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Raleigh-Durham International Airport (723060-13722), 9.6 mi SE of the city center, 395 ft . Hourly observations, 1991-2020.