Joplin weather in September: Joplin, Missouri: normal highs, lows, rain and records for September
Joplin in September has a normal high of 82°F and a normal low of 59°F, a daily mean of 71°F, falling from 87°F on the 1st to 77°F by the 30th. Measurable precipitation falls on 8 days in a normal September, 4.18 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 15°C, 106 mm of precipitation in September.
- NOAA stationJoplin Regional Airport
- Station IDUSW00013987
- Location37.15°N 94.50°W
- Elevation980 ft (299 m)
- Population53,605
- Jan 45° 25°
- Feb 50° 29°
- Mar 60° 37°
- Apr 69° 47°
- May 77° 56°
- Jun 86° 65°
- Jul 90° 70°
- Aug 90° 68°
- Sep 82° 59°
- Oct 71° 48°
- Nov 58° 37°
- Dec 48° 29°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Joplin in September?
The normal high is 82°F and the normal low 59°F, for a daily mean of 70.7°F. September is 8.3°F cooler than August and 11.4°F warmer than October. September is the 4th warmest month of the year in Joplin and the 4th wettest. Across the month the normal high falls 10°F, from 87°F on September 1 to 77°F on September 30. From one year to the next September's mean temperature typically moves about 3.2°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 68°F and 74°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 25%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 87°F | 65°F | 25% | 17% |
| September 8 | 85°F | 62°F | 25% | 17% |
| September 15 | 82°F | 60°F | 25% | 17% |
| September 22 | 80°F | 57°F | 25% | 17% |
| September 30 | 77°F | 54°F | 25% | 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 | 87°F | 65°F | 25% | 17% | 13 h |
| September 2 | 87°F | 64°F | 25% | 17% | 13 h |
| September 3 | 86°F | 64°F | 25% | 17% | 13 h |
| September 4 | 86°F | 64°F | 25% | 17% | 12 h 50 min |
| September 5 | 86°F | 63°F | 25% | 17% | 12 h 50 min |
| September 6 | 86°F | 63°F | 25% | 17% | 12 h 50 min |
| September 7 | 85°F | 63°F | 25% | 17% | 12 h 50 min |
| September 8 | 85°F | 62°F | 25% | 17% | 12 h 40 min |
| September 9 | 84°F | 62°F | 25% | 17% | 12 h 40 min |
| September 10 | 84°F | 62°F | 25% | 17% | 12 h 40 min |
| September 11 | 84°F | 61°F | 25% | 17% | 12 h 40 min |
| September 12 | 83°F | 61°F | 25% | 17% | 12 h 40 min |
| September 13 | 83°F | 61°F | 25% | 17% | 12 h 30 min |
| September 14 | 83°F | 60°F | 25% | 17% | 12 h 30 min |
| September 15 | 82°F | 60°F | 25% | 17% | 12 h 30 min |
| September 16 | 82°F | 59°F | 25% | 17% | 12 h 30 min |
| September 17 | 82°F | 59°F | 25% | 17% | 12 h 20 min |
| September 18 | 81°F | 59°F | 25% | 17% | 12 h 20 min |
| September 19 | 81°F | 58°F | 25% | 17% | 12 h 20 min |
| September 20 | 80°F | 58°F | 25% | 17% | 12 h 20 min |
| September 21 | 80°F | 57°F | 25% | 17% | 12 h 10 min |
| September 22 | 80°F | 57°F | 25% | 17% | 12 h 10 min |
| September 23 | 79°F | 57°F | 25% | 17% | 12 h 10 min |
| September 24 | 79°F | 56°F | 25% | 17% | 12 h 10 min |
| September 25 | 79°F | 56°F | 25% | 17% | 12 h 10 min |
| September 26 | 78°F | 55°F | 25% | 17% | 12 h |
| September 27 | 78°F | 55°F | 25% | 17% | 12 h |
| September 28 | 77°F | 55°F | 25% | 17% | 12 h |
| September 29 | 77°F | 54°F | 25% | 16% | 12 h |
| September 30 | 77°F | 54°F | 25% | 16% | 11 h 50 min |
- Normal high
- 82°FSeptember average
- Normal low
- 59°FSeptember average
- Precipitation
- 4.18 inmonth total
- Days with precipitation
- 80.01 inch or more
- Days at 90°F or more
- 6
- 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
- 20
- Sunshine
- 82%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013987; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Joplin in September?
On a given September day the chance of 0.01 inch or more is 25% on average, highest around September 17 (25%). In all, 4.18 in falls on 8 days of a normal September, 2 of them with an inch or more.
In a normal September in Joplin, 6 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013987.
How humid and windy is Joplin in September?
At 3 p.m. the normal temperature is 75°F with 47% relative humidity and a dew point of 54°F; at 6 a.m. it is 57°F with 85% humidity. The wind averages 7.9 mph, most often from the south-southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 57°F | 52°F | 85% | 6.4 mph | 76% |
| 9 a.m. | 66°F | 55°F | 67% | 9.6 mph | 76% |
| noon | 73°F | 54°F | 51% | 10.5 mph | 71% |
| 3 p.m. | 75°F | 54°F | 47% | 10.3 mph | 73% |
| 6 p.m. | 69°F | 54°F | 58% | 6.8 mph | 79% |
| 9 p.m. | 62°F | 54°F | 75% | 6.4 mph | 79% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013987. 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 Joplin?
The warmest September temperature on this station's record (since 1902) is 105°F, on September 7, 1947; the coldest is 30°F, on September 30, 1984. The wettest September brought 19.08 in (1986).
The September mean against the 1991-2020 normal of 70.7°F: 2021 75.3°F (+4.6), 2022 73.6°F (+2.9), 2023 73.9°F (+3.2), 2024 73.0°F (+2.3), 2025 72.3°F (+1.6), 2026 81.2°F (+10.5). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 75.3°F | +4.6°F | 3.08 in |
| 2022 | 73.6°F | +2.9°F | 0.41 in |
| 2023 | 73.9°F | +3.2°F | 3.41 in |
| 2024 | 73.0°F | +2.3°F | 1.14 in |
| 2025 | 72.3°F | +1.6°F | 2.97 in |
| 2026 | 81.2°F | +10.5°F | 2.54 in |
Source: records: ACIS, station USW00013987; recent months: ACIS, station USW00013987. Records and recent months use complete months only.
How does September in Joplin compare across Missouri?
Across the 134 places PlainClimate covers in Missouri, September normal highs run from 76°F in Unionville to 85°F in Kennett; Joplin's is 82°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.