Brunswick weather in September: Brunswick, Georgia: normal highs, lows, rain and records for September
Brunswick in September has a normal high of 86°F and a normal low of 73°F, a daily mean of 79°F, falling from 88°F on the 1st to 83°F by the 30th. Measurable precipitation falls on 11 days in a normal September, 6.00 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 23°C, 152 mm of precipitation in September.
- NOAA stationBrunswick Malcolm McKinnon Airport
- Station IDUSW00013878
- Location31.15°N 81.39°W
- Elevation16 ft (5 m)
- Population15,520
- Jan 62° 44°
- Feb 65° 47°
- Mar 70° 53°
- Apr 76° 60°
- May 83° 68°
- Jun 88° 74°
- Jul 91° 76°
- Aug 90° 76°
- Sep 86° 73°
- Oct 79° 64°
- Nov 71° 53°
- Dec 64° 47°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Brunswick in September?
The normal high is 86°F and the normal low 73°F, for a daily mean of 79.1°F. September is 3.7°F cooler than August and 7.8°F warmer than October. September is the 4th warmest month of the year in Brunswick and the wettest. Across the month the normal high falls 5°F, from 88°F on September 1 to 83°F on September 30. From one year to the next September's mean temperature typically moves about 1.8°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 77°F and 81°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 41%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 88°F | 75°F | 41% | 28% |
| September 8 | 87°F | 74°F | 39% | 27% |
| September 15 | 86°F | 73°F | 37% | 25% |
| September 22 | 85°F | 72°F | 35% | 23% |
| September 30 | 83°F | 69°F | 32% | 21% |
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 | 88°F | 75°F | 41% | 28% | 12 h 50 min |
| September 2 | 88°F | 75°F | 40% | 28% | 12 h 50 min |
| September 3 | 88°F | 75°F | 40% | 28% | 12 h 50 min |
| September 4 | 88°F | 74°F | 40% | 28% | 12 h 40 min |
| September 5 | 88°F | 74°F | 40% | 28% | 12 h 40 min |
| September 6 | 87°F | 74°F | 39% | 28% | 12 h 40 min |
| September 7 | 87°F | 74°F | 39% | 27% | 12 h 40 min |
| September 8 | 87°F | 74°F | 39% | 27% | 12 h 40 min |
| September 9 | 87°F | 74°F | 38% | 27% | 12 h 40 min |
| September 10 | 87°F | 74°F | 38% | 27% | 12 h 30 min |
| September 11 | 87°F | 74°F | 38% | 26% | 12 h 30 min |
| September 12 | 87°F | 73°F | 38% | 26% | 12 h 30 min |
| September 13 | 86°F | 73°F | 37% | 26% | 12 h 30 min |
| September 14 | 86°F | 73°F | 37% | 26% | 12 h 30 min |
| September 15 | 86°F | 73°F | 37% | 25% | 12 h 20 min |
| September 16 | 86°F | 73°F | 36% | 25% | 12 h 20 min |
| September 17 | 86°F | 73°F | 36% | 25% | 12 h 20 min |
| September 18 | 86°F | 72°F | 36% | 24% | 12 h 20 min |
| September 19 | 85°F | 72°F | 36% | 24% | 12 h 20 min |
| September 20 | 85°F | 72°F | 35% | 24% | 12 h 10 min |
| September 21 | 85°F | 72°F | 35% | 23% | 12 h 10 min |
| September 22 | 85°F | 72°F | 35% | 23% | 12 h 10 min |
| September 23 | 85°F | 71°F | 34% | 23% | 12 h 10 min |
| September 24 | 84°F | 71°F | 34% | 22% | 12 h 10 min |
| September 25 | 84°F | 71°F | 33% | 22% | 12 h 10 min |
| September 26 | 84°F | 71°F | 33% | 22% | 12 h |
| September 27 | 84°F | 70°F | 33% | 22% | 12 h |
| September 28 | 84°F | 70°F | 32% | 21% | 12 h |
| September 29 | 83°F | 70°F | 32% | 21% | 12 h |
| September 30 | 83°F | 69°F | 32% | 21% | 12 h |
- Normal high
- 86°FSeptember average
- Normal low
- 73°FSeptember average
- Precipitation
- 6.00 inmonth total
- Days with precipitation
- 110.01 inch or more
- Days at 90°F or more
- 4
- Daylight
- 12 h 50 min to 12 hSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 27
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013878; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Brunswick in September?
On a given September day the chance of 0.01 inch or more is 36% on average, highest around September 1 (41%). In all, 6.00 in falls on 11 days of a normal September, 2 of them with an inch or more.
In a normal September in Brunswick, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013878.
How humid and windy is Brunswick in September?
At 3 p.m. the normal temperature is 80°F with 67% relative humidity and a dew point of 68°F; at 6 a.m. it is 71°F with 89% humidity. The wind averages 8.2 mph, most often from the east-northeast in the afternoon. A dew point of 65°F or more feels muggy to most people.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 71°F | 67°F | 89% | 6.4 mph | – |
| 9 a.m. | 76°F | 68°F | 77% | 8.8 mph | 57% |
| noon | 80°F | 68°F | 66% | 10.6 mph | 58% |
| 3 p.m. | 80°F | 68°F | 67% | 11.1 mph | 58% |
| 6 p.m. | 77°F | 68°F | 75% | 8.7 mph | 61% |
| 9 p.m. | 75°F | 68°F | 80% | 7.5 mph | 67% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013878. 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 Brunswick?
The warmest September temperature on this station's record (since 1944) is 98°F, on September 5, 1944; the coldest is 49°F, on September 30, 1967. The wettest September brought 19.95 in (1953).
The September mean against the 1991-2020 normal of 79.1°F: 2021 78.3°F (−0.8), 2022 78.8°F (−0.3), 2023 80.2°F (+1.1), 2025 77.7°F (−1.4), 2026 80.7°F (+1.6). 2 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 78.3°F | −0.8°F | 4.19 in |
| 2022 | 78.8°F | −0.3°F | 8.25 in |
| 2023 | 80.2°F | +1.1°F | 9.37 in |
| 2025 | 77.7°F | −1.4°F | – |
| 2026 | 80.7°F | +1.6°F | – |
Source: records: ACIS, station USW00013878; recent months: ACIS, station USW00013878. Records and recent months use complete months only.
How does September in Brunswick compare across Georgia?
Across the 101 places PlainClimate covers in Georgia, September normal highs run from 72°F in Mountain City to 90°F in Bainbridge; Brunswick's is 86°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.