McComb weather in September: McComb, Mississippi: normal highs, lows, rain and records for September
McComb in September has a normal high of 87°F and a normal low of 67°F, a daily mean of 77°F, falling from 90°F on the 1st to 84°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 4.30 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 19°C, 109 mm of precipitation in September.
- NOAA stationMcComb/Pike County/John E Lewis Airport
- Station IDUSW00093919
- Location31.18°N 90.47°W
- Elevation413 ft (126 m)
- Population11,762
- Jan 60° 38°
- Feb 64° 42°
- Mar 71° 48°
- Apr 77° 54°
- May 84° 62°
- Jun 89° 69°
- Jul 91° 71°
- Aug 91° 71°
- Sep 87° 67°
- Oct 79° 56°
- Nov 69° 45°
- Dec 62° 41°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is McComb in September?
The normal high is 87°F and the normal low 67°F, for a daily mean of 76.9°F. September is 4.1°F cooler than August and 9.4°F warmer than October. September is the 4th warmest month of the year in McComb and the 10th wettest. Across the month the normal high falls 6°F, from 90°F on September 1 to 84°F on September 30. From one year to the next September's mean temperature typically moves about 2.1°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 75°F and 79°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 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 90°F | 70°F | 35% | 22% |
| September 8 | 89°F | 69°F | 32% | 21% |
| September 15 | 87°F | 67°F | 29% | 19% |
| September 22 | 86°F | 65°F | 27% | 17% |
| September 30 | 84°F | 62°F | 24% | 15% |
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 | 90°F | 70°F | 35% | 22% | 12 h 50 min |
| September 2 | 90°F | 70°F | 35% | 22% | 12 h 50 min |
| September 3 | 89°F | 69°F | 34% | 22% | 12 h 50 min |
| September 4 | 89°F | 69°F | 34% | 22% | 12 h 40 min |
| September 5 | 89°F | 69°F | 33% | 21% | 12 h 40 min |
| September 6 | 89°F | 69°F | 33% | 21% | 12 h 40 min |
| September 7 | 89°F | 69°F | 32% | 21% | 12 h 40 min |
| September 8 | 89°F | 69°F | 32% | 21% | 12 h 40 min |
| September 9 | 89°F | 68°F | 32% | 20% | 12 h 40 min |
| September 10 | 88°F | 68°F | 31% | 20% | 12 h 30 min |
| September 11 | 88°F | 68°F | 31% | 20% | 12 h 30 min |
| September 12 | 88°F | 68°F | 30% | 20% | 12 h 30 min |
| September 13 | 88°F | 68°F | 30% | 19% | 12 h 30 min |
| September 14 | 88°F | 67°F | 30% | 19% | 12 h 30 min |
| September 15 | 87°F | 67°F | 29% | 19% | 12 h 20 min |
| September 16 | 87°F | 67°F | 29% | 19% | 12 h 20 min |
| September 17 | 87°F | 67°F | 28% | 19% | 12 h 20 min |
| September 18 | 87°F | 66°F | 28% | 18% | 12 h 20 min |
| September 19 | 87°F | 66°F | 28% | 18% | 12 h 20 min |
| September 20 | 87°F | 66°F | 27% | 18% | 12 h 10 min |
| September 21 | 86°F | 65°F | 27% | 18% | 12 h 10 min |
| September 22 | 86°F | 65°F | 27% | 17% | 12 h 10 min |
| September 23 | 86°F | 65°F | 26% | 17% | 12 h 10 min |
| September 24 | 86°F | 65°F | 26% | 17% | 12 h 10 min |
| September 25 | 85°F | 64°F | 25% | 16% | 12 h 10 min |
| September 26 | 85°F | 64°F | 25% | 16% | 12 h |
| September 27 | 85°F | 64°F | 25% | 16% | 12 h |
| September 28 | 85°F | 63°F | 24% | 15% | 12 h |
| September 29 | 84°F | 63°F | 24% | 15% | 12 h |
| September 30 | 84°F | 62°F | 24% | 15% | 12 h |
- Normal high
- 87°FSeptember average
- Normal low
- 67°FSeptember average
- Precipitation
- 4.30 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 13
- 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
- 82%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093919; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in McComb in September?
On a given September day the chance of 0.01 inch or more is 29% on average, highest around September 1 (35%). In all, 4.30 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in McComb, 13 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093919.
How humid and windy is McComb in September?
At 3 p.m. the normal temperature is 82°F with 49% relative humidity and a dew point of 61°F; at 6 a.m. it is 64°F with 89% humidity. The wind averages 4.8 mph, most often from the north-northeast in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 64°F | 61°F | 89% | 3.3 mph | 71% |
| 9 a.m. | 74°F | 63°F | 69% | 6.0 mph | 67% |
| noon | 81°F | 62°F | 52% | 7.3 mph | 61% |
| 3 p.m. | 82°F | 61°F | 49% | 7.4 mph | 67% |
| 6 p.m. | 75°F | 63°F | 67% | 3.8 mph | 75% |
| 9 p.m. | 69°F | 63°F | 80% | 3.4 mph | 80% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00093919. 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 McComb?
The warmest September temperature on this station's record (since 1948) is 105°F, on September 2, 2000; the coldest is 39°F, on September 29, 1967. The wettest September brought 11.65 in (2002).
The September mean against the 1991-2020 normal of 76.9°F: 2021 76.2°F (−0.8), 2022 75.4°F (−1.5), 2023 80.3°F (+3.3), 2024 76.6°F (−0.3), 2025 78.1°F (+1.2), 2026 81.1°F (+4.2). 3 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 76.2°F | −0.8°F | 8.72 in |
| 2022 | 75.4°F | −1.5°F | 0.92 in |
| 2023 | 80.3°F | +3.3°F | 0.20 in |
| 2024 | 76.6°F | −0.3°F | 3.25 in |
| 2025 | 78.1°F | +1.2°F | 1.03 in |
| 2026 | 81.1°F | +4.2°F | 2.66 in |
Source: records: ACIS, station USW00093919; recent months: ACIS, station USW00093919. Records and recent months use complete months only.
How does September in McComb 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; McComb's is 87°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.