Vienna weather in September: Vienna, Virginia: normal highs, lows, rain and records for September
Vienna in September has a normal high of 76°F and a normal low of 57°F, a daily mean of 67°F, falling from 80°F on the 1st to 71°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 4.16 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 24°C and low of 14°C, 106 mm of precipitation in September.
- NOAA stationVienna
- Station IDUSC00448737
- Location38.89°N 77.29°W
- Elevation418 ft (127 m)
- From the center2 miles
- Population16,562
- Jan 42° 23°
- Feb 45° 24°
- Mar 53° 32°
- Apr 65° 41°
- May 72° 52°
- Jun 80° 61°
- Jul 84° 67°
- Aug 82° 65°
- Sep 76° 57°
- Oct 65° 45°
- Nov 56° 35°
- Dec 46° 28°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Vienna in September?
The normal high is 76°F and the normal low 57°F, for a daily mean of 66.5°F. September is 7.1°F cooler than August and 11.2°F warmer than October. September is the 4th warmest month of the year in Vienna and the 3rd wettest. Across the month the normal high falls 9°F, from 80°F on September 1 to 71°F on September 30. From one year to the next September's mean temperature typically moves about 2.2°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 64°F and 69°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 | 80°F | 62°F | 30% | 19% |
| September 8 | 79°F | 60°F | 30% | 19% |
| September 15 | 76°F | 58°F | 29% | 18% |
| September 22 | 74°F | 55°F | 30% | 19% |
| September 30 | 71°F | 52°F | 30% | 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 | 80°F | 62°F | 30% | 19% | 13 h |
| September 2 | 80°F | 62°F | 30% | 19% | 13 h |
| September 3 | 80°F | 61°F | 30% | 19% | 13 h |
| September 4 | 80°F | 61°F | 30% | 19% | 13 h |
| September 5 | 79°F | 61°F | 30% | 19% | 12 h 50 min |
| September 6 | 79°F | 60°F | 30% | 19% | 12 h 50 min |
| September 7 | 79°F | 60°F | 30% | 19% | 12 h 50 min |
| September 8 | 79°F | 60°F | 30% | 19% | 12 h 50 min |
| September 9 | 78°F | 60°F | 29% | 18% | 12 h 50 min |
| September 10 | 78°F | 59°F | 29% | 18% | 12 h 40 min |
| September 11 | 78°F | 59°F | 29% | 18% | 12 h 40 min |
| September 12 | 77°F | 59°F | 29% | 18% | 12 h 40 min |
| September 13 | 77°F | 58°F | 29% | 18% | 12 h 40 min |
| September 14 | 77°F | 58°F | 29% | 18% | 12 h 30 min |
| September 15 | 76°F | 58°F | 29% | 18% | 12 h 30 min |
| September 16 | 76°F | 57°F | 29% | 18% | 12 h 30 min |
| September 17 | 76°F | 57°F | 29% | 18% | 12 h 30 min |
| September 18 | 75°F | 56°F | 29% | 18% | 12 h 20 min |
| September 19 | 75°F | 56°F | 29% | 18% | 12 h 20 min |
| September 20 | 75°F | 56°F | 29% | 18% | 12 h 20 min |
| September 21 | 74°F | 55°F | 30% | 18% | 12 h 20 min |
| September 22 | 74°F | 55°F | 30% | 19% | 12 h 10 min |
| September 23 | 73°F | 55°F | 30% | 19% | 12 h 10 min |
| September 24 | 73°F | 54°F | 30% | 19% | 12 h 10 min |
| September 25 | 73°F | 54°F | 30% | 19% | 12 h 10 min |
| September 26 | 72°F | 53°F | 30% | 19% | 12 h |
| September 27 | 72°F | 53°F | 30% | 19% | 12 h |
| September 28 | 72°F | 53°F | 30% | 18% | 12 h |
| September 29 | 71°F | 52°F | 30% | 18% | 12 h |
| September 30 | 71°F | 52°F | 30% | 18% | 11 h 50 min |
- Normal high
- 76°FSeptember average
- Normal low
- 57°FSeptember average
- Precipitation
- 4.16 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 25
- Days at 80°F or more
- 11
- Sunshine
- 76%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00448737; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Vienna in September?
On a given September day the chance of 0.01 inch or more is 29% on average, highest around September 27 (30%). In all, 4.16 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Vienna, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00448737.
What are the records for September in Vienna?
The warmest September temperature on this station's record (since 1948) is 98°F, on September 7, 2014; the coldest is 41°F, on September 19, 2013. The wettest September brought 11.30 in (1966).
The September mean against the 1991-2020 normal of 66.5°F: 2021 68.4°F (+1.9), 2022 66.8°F (+0.3), 2023 67.3°F (+0.8), 2024 66.2°F (−0.3), 2025 66.7°F (+0.2), 2026 67.9°F (+1.4). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 68.4°F | +1.9°F | 6.81 in |
| 2022 | 66.8°F | +0.3°F | 2.50 in |
| 2023 | 67.3°F | +0.8°F | 6.23 in |
| 2024 | 66.2°F | −0.3°F | 2.88 in |
| 2025 | 66.7°F | +0.2°F | 2.04 in |
| 2026 | 67.9°F | +1.4°F | 5.20 in |
Source: records: ACIS, station USC00448737; recent months: ACIS, station USC00448737. Records and recent months use complete months only.
How does September in Vienna 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; Vienna's is 76°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.