Biloxi weather in September: Biloxi, Mississippi: normal highs, lows, rain and records for September
Biloxi in September has a normal high of 87°F and a normal low of 72°F, a daily mean of 79°F, falling from 89°F on the 1st to 84°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 5.24 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 22°C, 133 mm of precipitation in September.
- NOAA stationBiloxi
- Station IDUSC00220792
- Location30.39°N 89.00°W
- Elevation10 ft (3 m)
- From the center5 miles
- Population48,144
- Jan 60° 44°
- Feb 63° 47°
- Mar 69° 53°
- Apr 76° 60°
- May 83° 68°
- Jun 88° 74°
- Jul 90° 75°
- Aug 90° 75°
- Sep 87° 72°
- Oct 79° 62°
- Nov 69° 51°
- Dec 62° 46°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Biloxi in September?
The normal high is 87°F and the normal low 72°F, for a daily mean of 79.2°F. September is 3.3°F cooler than August and 8.7°F warmer than October. September is the 4th warmest month of the year in Biloxi and the 7th wettest. Across the month the normal high falls 5°F, from 89°F on September 1 to 84°F on September 30. From one year to the next September's mean temperature typically moves about 1.7°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 78°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 36%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 89°F | 74°F | 36% | 25% |
| September 8 | 88°F | 73°F | 32% | 22% |
| September 15 | 87°F | 72°F | 30% | 20% |
| September 22 | 86°F | 70°F | 27% | 18% |
| September 30 | 84°F | 68°F | 24% | 16% |
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 | 89°F | 74°F | 36% | 25% | 12 h 50 min |
| September 2 | 89°F | 74°F | 36% | 25% | 12 h 50 min |
| September 3 | 89°F | 74°F | 35% | 24% | 12 h 40 min |
| September 4 | 89°F | 74°F | 35% | 24% | 12 h 40 min |
| September 5 | 89°F | 74°F | 34% | 24% | 12 h 40 min |
| September 6 | 89°F | 73°F | 34% | 23% | 12 h 40 min |
| September 7 | 88°F | 73°F | 33% | 23% | 12 h 40 min |
| September 8 | 88°F | 73°F | 32% | 22% | 12 h 40 min |
| September 9 | 88°F | 73°F | 32% | 22% | 12 h 30 min |
| September 10 | 88°F | 73°F | 32% | 22% | 12 h 30 min |
| September 11 | 88°F | 73°F | 31% | 21% | 12 h 30 min |
| September 12 | 88°F | 72°F | 31% | 21% | 12 h 30 min |
| September 13 | 88°F | 72°F | 30% | 21% | 12 h 30 min |
| September 14 | 87°F | 72°F | 30% | 20% | 12 h 30 min |
| September 15 | 87°F | 72°F | 30% | 20% | 12 h 20 min |
| September 16 | 87°F | 72°F | 29% | 20% | 12 h 20 min |
| September 17 | 87°F | 72°F | 29% | 19% | 12 h 20 min |
| September 18 | 87°F | 71°F | 28% | 19% | 12 h 20 min |
| September 19 | 87°F | 71°F | 28% | 19% | 12 h 20 min |
| September 20 | 86°F | 71°F | 28% | 19% | 12 h 10 min |
| September 21 | 86°F | 71°F | 28% | 18% | 12 h 10 min |
| September 22 | 86°F | 70°F | 27% | 18% | 12 h 10 min |
| September 23 | 86°F | 70°F | 27% | 18% | 12 h 10 min |
| September 24 | 86°F | 70°F | 26% | 17% | 12 h 10 min |
| September 25 | 85°F | 70°F | 26% | 17% | 12 h 10 min |
| September 26 | 85°F | 69°F | 26% | 17% | 12 h |
| September 27 | 85°F | 69°F | 25% | 17% | 12 h |
| September 28 | 85°F | 69°F | 25% | 16% | 12 h |
| September 29 | 84°F | 68°F | 25% | 16% | 12 h |
| September 30 | 84°F | 68°F | 24% | 16% | 12 h |
- Normal high
- 87°FSeptember average
- Normal low
- 72°FSeptember average
- Precipitation
- 5.24 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 8
- 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
- 28
- Sunshine
- 83%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00220792; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Biloxi in September?
On a given September day the chance of 0.01 inch or more is 30% on average, highest around September 1 (36%). In all, 5.24 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Biloxi, 8 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00220792.
What are the records for September in Biloxi?
The warmest September temperature on this station's record (since 1893) is 101°F, on September 10, 1954; the coldest is 44°F, on September 26, 1899. The wettest September brought 27.70 in (1998).
The September mean against the 1991-2020 normal of 79.2°F: 2021 77.0°F (−2.2), 2023 81.4°F (+2.2), 2024 79.5°F (+0.3), 2025 81.0°F (+1.8), 2026 82.9°F (+3.7). 4 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 77.0°F | −2.2°F | 16.29 in |
| 2023 | 81.4°F | +2.2°F | 1.41 in |
| 2024 | 79.5°F | +0.3°F | 8.96 in |
| 2025 | 81.0°F | +1.8°F | 1.92 in |
| 2026 | 82.9°F | +3.7°F | 1.77 in |
Source: records: ACIS, station USC00220792; recent months: ACIS, station USC00220792. Records and recent months use complete months only.
How does September in Biloxi compare across Mississippi?
Across the 81 places PlainClimate covers in Mississippi, September normal highs run from 83°F in Holly Springs to 91°F in Monticello; Biloxi's is 87°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.