Muskegon weather in September: Muskegon, Michigan: normal highs, lows, rain and records for September
Muskegon in September has a normal high of 73°F and a normal low of 54°F, a daily mean of 64°F, falling from 78°F on the 1st to 68°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 3.26 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 12°C, 83 mm of precipitation in September.
- NOAA stationMuskegon County Airport
- Station IDUSW00014840
- Location43.17°N 86.24°W
- Elevation625 ft (191 m)
- From the center4 miles
- Population37,287
- Jan 33° 21°
- Feb 35° 21°
- Mar 44° 27°
- Apr 57° 37°
- May 68° 48°
- Jun 78° 57°
- Jul 82° 62°
- Aug 80° 61°
- Sep 73° 54°
- Oct 61° 43°
- Nov 48° 34°
- Dec 37° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Muskegon in September?
The normal high is 73°F and the normal low 54°F, for a daily mean of 63.5°F. September is 7.3°F cooler than August and 11.6°F warmer than October. September is the 4th warmest month of the year in Muskegon and the 4th wettest. Across the month the normal high falls 10°F, from 78°F on September 1 to 68°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 61°F and 66°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 37%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 78°F | 58°F | 29% | 18% |
| September 8 | 76°F | 56°F | 30% | 19% |
| September 15 | 74°F | 54°F | 32% | 20% |
| September 22 | 71°F | 51°F | 34% | 22% |
| September 30 | 68°F | 48°F | 37% | 24% |
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 | 78°F | 58°F | 29% | 18% | 13 h 10 min |
| September 2 | 78°F | 58°F | 29% | 18% | 13 h 10 min |
| September 3 | 78°F | 58°F | 29% | 18% | 13 h 10 min |
| September 4 | 77°F | 58°F | 29% | 18% | 13 h 10 min |
| September 5 | 77°F | 57°F | 29% | 18% | 13 h |
| September 6 | 77°F | 57°F | 30% | 18% | 13 h |
| September 7 | 77°F | 57°F | 30% | 18% | 13 h |
| September 8 | 76°F | 56°F | 30% | 19% | 12 h 50 min |
| September 9 | 76°F | 56°F | 31% | 19% | 12 h 50 min |
| September 10 | 76°F | 56°F | 31% | 19% | 12 h 50 min |
| September 11 | 75°F | 55°F | 31% | 19% | 12 h 50 min |
| September 12 | 75°F | 55°F | 31% | 19% | 12 h 40 min |
| September 13 | 75°F | 55°F | 32% | 20% | 12 h 40 min |
| September 14 | 74°F | 54°F | 32% | 20% | 12 h 40 min |
| September 15 | 74°F | 54°F | 32% | 20% | 12 h 30 min |
| September 16 | 74°F | 53°F | 32% | 20% | 12 h 30 min |
| September 17 | 73°F | 53°F | 33% | 20% | 12 h 30 min |
| September 18 | 73°F | 53°F | 33% | 21% | 12 h 30 min |
| September 19 | 72°F | 52°F | 33% | 21% | 12 h 20 min |
| September 20 | 72°F | 52°F | 34% | 21% | 12 h 20 min |
| September 21 | 72°F | 52°F | 34% | 21% | 12 h 20 min |
| September 22 | 71°F | 51°F | 34% | 22% | 12 h 10 min |
| September 23 | 71°F | 51°F | 34% | 22% | 12 h 10 min |
| September 24 | 70°F | 50°F | 35% | 22% | 12 h 10 min |
| September 25 | 70°F | 50°F | 35% | 22% | 12 h 10 min |
| September 26 | 69°F | 50°F | 36% | 23% | 12 h |
| September 27 | 69°F | 49°F | 36% | 23% | 12 h |
| September 28 | 69°F | 49°F | 36% | 23% | 12 h |
| September 29 | 68°F | 49°F | 37% | 23% | 11 h 50 min |
| September 30 | 68°F | 48°F | 37% | 24% | 11 h 50 min |
- Normal high
- 73°FSeptember average
- Normal low
- 54°FSeptember average
- Precipitation
- 3.26 inmonth total
- Days with precipitation
- 90.01 inch or more
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 20
- Days at 80°F or more
- 6
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014840; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Muskegon in September?
On a given September day the chance of 0.01 inch or more is 32% on average, highest around September 30 (37%). In all, 3.26 in falls on 9 days of a normal September, 1 of them with an inch or more.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014840.
How humid and windy is Muskegon in September?
At 3 p.m. the normal temperature is 64°F with 59% relative humidity and a dew point of 49°F; at 6 a.m. it is 52°F with 84% humidity. The wind averages 9.0 mph, most often from the west-southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 52°F | 47°F | 84% | 7.5 mph | 56% |
| 9 a.m. | 57°F | 49°F | 75% | 9.7 mph | 53% |
| noon | 62°F | 49°F | 62% | 12.0 mph | 42% |
| 3 p.m. | 64°F | 49°F | 59% | 12.0 mph | 45% |
| 6 p.m. | 61°F | 49°F | 65% | 8.6 mph | 55% |
| 9 p.m. | 56°F | 49°F | 76% | 7.4 mph | 56% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014840. 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 Muskegon?
The warmest September temperature on Muskegon's official record (since 1896) is 95°F, on September 1, 1953; the coldest is 27°F, on September 27, 1989. The wettest September brought 13.55 in (1986).
The September mean against the 1991-2020 normal of 63.5°F: 2021 65.6°F (+2.1), 2022 65.3°F (+1.8), 2023 66.8°F (+3.3), 2024 67.0°F (+3.5), 2025 64.7°F (+1.2), 2026 64.5°F (+1.0). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 65.6°F | +2.1°F | 1.65 in |
| 2022 | 65.3°F | +1.8°F | 2.57 in |
| 2023 | 66.8°F | +3.3°F | 1.50 in |
| 2024 | 67.0°F | +3.5°F | 4.89 in |
| 2025 | 64.7°F | +1.2°F | 0.85 in |
| 2026 | 64.5°F | +1.0°F | 3.49 in |
Source: records: ACIS, NWS threaded record MKGthr; recent months: ACIS, station USW00014840. Records and recent months use complete months only.
How does September in Muskegon compare across Michigan?
Across the 140 places PlainClimate covers in Michigan, September normal highs run from 65°F in Munising to 76°F in Eau Claire; Muskegon's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.