Quantico weather in September: Quantico, Virginia: normal highs, lows, rain and records for September
Quantico in September has a normal high of 80°F and a normal low of 62°F, a daily mean of 71°F, falling from 84°F on the 1st to 75°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 3.43 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 17°C, 87 mm of precipitation in September.
- NOAA stationQuantico Marine Corps Air Station
- Station IDUSW00013773
- Location38.50°N 77.30°W
- Elevation10 ft (3 m)
- Population591
- Jan 45° 28°
- Feb 48° 30°
- Mar 56° 37°
- Apr 68° 47°
- May 76° 57°
- Jun 84° 66°
- Jul 88° 71°
- Aug 86° 69°
- Sep 80° 62°
- Oct 69° 50°
- Nov 58° 39°
- Dec 49° 32°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Quantico in September?
The normal high is 80°F and the normal low 62°F, for a daily mean of 70.8°F. September is 6.8°F cooler than August and 11.6°F warmer than October. September is the 4th warmest month of the year in Quantico and the 6th 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 2.3°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 69°F and 73°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 31%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 84°F | 67°F | 27% | 16% |
| September 8 | 82°F | 65°F | 28% | 17% |
| September 15 | 80°F | 63°F | 29% | 17% |
| September 22 | 77°F | 60°F | 31% | 18% |
| September 30 | 75°F | 57°F | 31% | 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 | 67°F | 27% | 16% | 13 h |
| September 2 | 84°F | 66°F | 27% | 16% | 13 h |
| September 3 | 83°F | 66°F | 27% | 16% | 13 h |
| September 4 | 83°F | 66°F | 28% | 16% | 13 h |
| September 5 | 83°F | 66°F | 28% | 17% | 12 h 50 min |
| September 6 | 83°F | 65°F | 28% | 17% | 12 h 50 min |
| September 7 | 82°F | 65°F | 28% | 17% | 12 h 50 min |
| September 8 | 82°F | 65°F | 28% | 17% | 12 h 50 min |
| September 9 | 82°F | 65°F | 28% | 17% | 12 h 40 min |
| September 10 | 81°F | 64°F | 28% | 17% | 12 h 40 min |
| September 11 | 81°F | 64°F | 29% | 17% | 12 h 40 min |
| September 12 | 81°F | 64°F | 29% | 17% | 12 h 40 min |
| September 13 | 81°F | 63°F | 29% | 17% | 12 h 30 min |
| September 14 | 80°F | 63°F | 29% | 17% | 12 h 30 min |
| September 15 | 80°F | 63°F | 29% | 17% | 12 h 30 min |
| September 16 | 80°F | 62°F | 29% | 17% | 12 h 30 min |
| September 17 | 79°F | 62°F | 30% | 18% | 12 h 20 min |
| September 18 | 79°F | 62°F | 30% | 18% | 12 h 20 min |
| September 19 | 79°F | 61°F | 30% | 18% | 12 h 20 min |
| September 20 | 78°F | 61°F | 30% | 18% | 12 h 20 min |
| September 21 | 78°F | 60°F | 30% | 18% | 12 h 20 min |
| September 22 | 77°F | 60°F | 31% | 18% | 12 h 10 min |
| September 23 | 77°F | 60°F | 31% | 18% | 12 h 10 min |
| September 24 | 77°F | 59°F | 31% | 18% | 12 h 10 min |
| September 25 | 76°F | 59°F | 31% | 18% | 12 h 10 min |
| September 26 | 76°F | 58°F | 31% | 18% | 12 h |
| September 27 | 76°F | 58°F | 31% | 18% | 12 h |
| September 28 | 75°F | 57°F | 31% | 18% | 12 h |
| September 29 | 75°F | 57°F | 31% | 18% | 12 h |
| September 30 | 75°F | 57°F | 31% | 18% | 11 h 50 min |
- Normal high
- 80°FSeptember average
- Normal low
- 62°FSeptember average
- Precipitation
- 3.43 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 2
- 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
- 15
- Sunshine
- 76%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013773; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Quantico in September?
On a given September day the chance of 0.01 inch or more is 29% on average, highest around September 26 (31%). In all, 3.43 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Quantico, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013773.
How humid and windy is Quantico in September?
At 3 p.m. the normal temperature is 72°F with 56% relative humidity and a dew point of 56°F; at 6 a.m. it is 59°F with 86% humidity. The wind averages 6.8 mph, most often from the east-southeast in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 59°F | 55°F | 86% | 6.3 mph | 47% |
| 9 a.m. | 65°F | 56°F | 74% | 6.9 mph | 44% |
| noon | 70°F | 57°F | 62% | 7.9 mph | 39% |
| 3 p.m. | 72°F | 56°F | 56% | 7.6 mph | 41% |
| 6 p.m. | 68°F | 57°F | 69% | 6.0 mph | 49% |
| 9 p.m. | 63°F | 57°F | 80% | 6.5 mph | 59% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013773. 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 Quantico?
The warmest September temperature on this station's record (since 1945) is 105°F, on September 7, 1954; the coldest is 38°F, on September 28, 1947. The wettest September brought 13.52 in (1975).
The September mean against the 1991-2020 normal of 70.8°F: 2021 72.8°F (+2.0), 2022 71.9°F (+1.1), 2023 72.4°F (+1.6), 2025 71.0°F (+0.2), 2026 75.1°F (+4.3). 5 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 72.8°F | +2.0°F | 1.70 in |
| 2022 | 71.9°F | +1.1°F | 1.74 in |
| 2023 | 72.4°F | +1.6°F | 4.27 in |
| 2025 | 71.0°F | +0.2°F | – |
| 2026 | 75.1°F | +4.3°F | – |
Source: records: ACIS, station USW00013773; recent months: ACIS, station USW00013773. Records and recent months use complete months only.
How does September in Quantico 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; Quantico's is 80°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.