Roanoke weather in September: Roanoke, Virginia: normal highs, lows, rain and records for September
Roanoke in September has a normal high of 80°F and a normal low of 59°F, a daily mean of 70°F, falling from 84°F on the 1st to 75°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 4.06 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 15°C, 103 mm of precipitation in September.
- NOAA stationRoanoke-Blacksburg Regional Airport
- Station IDUSW00013741
- Location37.32°N 79.97°W
- Elevation1,175 ft (358 m)
- From the center3 miles
- Population97,912
- Jan 47° 29°
- Feb 51° 31°
- Mar 59° 38°
- Apr 70° 46°
- May 77° 55°
- Jun 84° 63°
- Jul 88° 67°
- Aug 87° 66°
- Sep 80° 59°
- Oct 70° 48°
- Nov 59° 38°
- Dec 50° 32°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Roanoke in September?
The normal high is 80°F and the normal low 59°F, for a daily mean of 69.6°F. September is 6.6°F cooler than August and 10.7°F warmer than October. September is the 4th warmest month of the year in Roanoke and the 4th wettest. Across the month the normal high falls 9°F, from 84°F on September 1 to 75°F on September 30. From one year to the next September's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 67°F and 72°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 29%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 84°F | 64°F | 29% | 18% |
| September 8 | 82°F | 62°F | 29% | 18% |
| September 15 | 80°F | 60°F | 28% | 18% |
| September 22 | 78°F | 57°F | 28% | 18% |
| September 30 | 75°F | 54°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 | 84°F | 64°F | 29% | 18% | 13 h |
| September 2 | 84°F | 63°F | 29% | 18% | 13 h |
| September 3 | 84°F | 63°F | 29% | 18% | 13 h |
| September 4 | 84°F | 63°F | 29% | 18% | 12 h 50 min |
| September 5 | 83°F | 63°F | 29% | 18% | 12 h 50 min |
| September 6 | 83°F | 62°F | 29% | 18% | 12 h 50 min |
| September 7 | 83°F | 62°F | 29% | 18% | 12 h 50 min |
| September 8 | 82°F | 62°F | 29% | 18% | 12 h 50 min |
| September 9 | 82°F | 61°F | 29% | 18% | 12 h 40 min |
| September 10 | 82°F | 61°F | 29% | 18% | 12 h 40 min |
| September 11 | 82°F | 61°F | 28% | 18% | 12 h 40 min |
| September 12 | 81°F | 60°F | 28% | 18% | 12 h 40 min |
| September 13 | 81°F | 60°F | 28% | 18% | 12 h 30 min |
| September 14 | 81°F | 60°F | 28% | 18% | 12 h 30 min |
| September 15 | 80°F | 60°F | 28% | 18% | 12 h 30 min |
| September 16 | 80°F | 59°F | 28% | 18% | 12 h 30 min |
| September 17 | 80°F | 59°F | 28% | 18% | 12 h 20 min |
| September 18 | 79°F | 59°F | 28% | 18% | 12 h 20 min |
| September 19 | 79°F | 58°F | 28% | 18% | 12 h 20 min |
| September 20 | 79°F | 58°F | 28% | 18% | 12 h 20 min |
| September 21 | 78°F | 57°F | 28% | 18% | 12 h 10 min |
| September 22 | 78°F | 57°F | 28% | 18% | 12 h 10 min |
| September 23 | 78°F | 57°F | 28% | 18% | 12 h 10 min |
| September 24 | 77°F | 56°F | 28% | 18% | 12 h 10 min |
| September 25 | 77°F | 56°F | 28% | 18% | 12 h 10 min |
| September 26 | 77°F | 56°F | 28% | 18% | 12 h |
| September 27 | 76°F | 55°F | 28% | 18% | 12 h |
| September 28 | 76°F | 55°F | 28% | 18% | 12 h |
| September 29 | 76°F | 54°F | 28% | 18% | 12 h |
| September 30 | 75°F | 54°F | 28% | 18% | 11 h 50 min |
- Normal high
- 80°FSeptember average
- Normal low
- 59°FSeptember average
- Precipitation
- 4.06 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 27
- Days at 80°F or more
- 15
- Sunshine
- 75%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013741; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Roanoke in September?
On a given September day the chance of 0.01 inch or more is 28% on average, highest around September 1 (29%). In all, 4.06 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Roanoke, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013741.
How humid and windy is Roanoke in September?
At 3 p.m. the normal temperature is 73°F with 50% relative humidity and a dew point of 53°F; at 6 a.m. it is 57°F with 85% humidity. The wind averages 5.3 mph, most often from the west-southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 57°F | 52°F | 85% | 3.9 mph | 57% |
| 9 a.m. | 63°F | 54°F | 72% | 5.5 mph | 53% |
| noon | 70°F | 54°F | 56% | 7.4 mph | 47% |
| 3 p.m. | 73°F | 53°F | 50% | 8.2 mph | 44% |
| 6 p.m. | 68°F | 53°F | 59% | 6.9 mph | 58% |
| 9 p.m. | 63°F | 54°F | 73% | 3.8 mph | 63% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013741. 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 Roanoke?
The warmest September temperature on Roanoke's official record (since 1912) is 103°F, on September 1, 1932; the coldest is 32°F, on September 30, 1942. The wettest September brought 12.06 in (1945).
The September mean against the 1991-2020 normal of 69.6°F: 2021 71.5°F (+1.9), 2022 69.7°F (+0.1), 2023 70.9°F (+1.3), 2024 68.8°F (−0.8), 2025 68.8°F (−0.8), 2026 74.0°F (+4.4). 4 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 71.5°F | +1.9°F | 4.84 in |
| 2022 | 69.7°F | +0.1°F | 4.19 in |
| 2023 | 70.9°F | +1.3°F | 2.79 in |
| 2024 | 68.8°F | −0.8°F | 8.61 in |
| 2025 | 68.8°F | −0.8°F | 2.22 in |
| 2026 | 74.0°F | +4.4°F | 1.40 in |
Source: records: ACIS, NWS threaded record ROAthr; recent months: ACIS, station USW00013741. Records and recent months use complete months only.
How does September in Roanoke compare across Virginia?
Across the 81 places PlainClimate covers in Virginia, September normal highs run from 73°F in Floyd to 85°F in Chesapeake; Roanoke's is 80°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.