Poplar Bluff weather in September

In September, Poplar Bluff sees average daytime highs of 82°F and overnight lows near 62°F, with 3.3 in of rain across 7.4 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 86°F in the first days to 78°F by the end. The sky is clear or mostly clear about 50% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Poplar Bluff's 1st-clearest and 10th-windiest month. For the whole year in context, see Poplar Bluff's year-round climate.

Daytime high
82°
4th warmest
Overnight low
62°
9th coldest
Rainfall
3.3 in
7.4 wet days
Daylight
12 h 12 min
5:49 AM – 6:03 PM
Cloud cover
44%
1st clearest
Wind
6 mph
10th windiest
Solar energy
4.86 kWh/m²
Travel score
6.6
out of 10

Poplar Bluff is city in and county seat of Butler County, Missouri, United States.

Density
505/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 86°F in the first days to 78°F by the end.

A typical September day in Poplar Bluff reaches about 82°F in the afternoon and slips back to 62°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 73°F and 90°F. Set against its neighbours, September runs about 6°F cooler than August and about 12°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18767
28667
38667
48666
58566
68565
78565
88465
98464
108464
118364
128363
138363
148262
158262
168262
178161
188161
198060
208060
218060
228059
237959
247958
257958
267857
277857
287857
297756
307756

How September really feels in Poplar Bluff

Once humidity and wind are folded in, September averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Poplar Bluff weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan45° / 29°3.68.71.69.81.0
Feb50° / 32°3.37.91.310.62.2
Mar59° / 40°4.711.40.711.74.5
Apr69° / 50°5.210.9012.96.2
May77° / 60°4.912.8013.96.3
Jun86° / 68°3.410014.55.0
Jul89° / 72°3.010.9014.34.0
Aug88° / 69°2.98.7013.44.6
Sep82° / 62°3.37.4012.26.6
Oct70° / 50°3.88.30.1117.0
Nov58° / 40°4.290.4104.4
Dec48° / 32°3.78.61.19.51.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16436
26535
36436
46436
56535
66535
76535
86436
96337
106238
116238
126238
136040
146040
156040
165941
175941
185941
196040
206040
216139
226238
236337
246436
256535
266634
276634
286832
296832
306832

Chance of precipitation in September

Any precipitation

Poplar Bluff gets around 3.3 in of rain over 7.4 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 25% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
124
224
324
424
524
624
724
824
924
1025
1125
1225
1326
1426
1527
1627
1727
1828
1928
2028
2127
2227
2326
2425
2525
2624
2723
2822
2922
3021

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 34% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1913213027
21013213025
31114213024
41215222922
51415222920
61516222919
71617222817
81717222815
91818232814
102018232712
112118232711
122218232610
13241823269
14251823259
15261822258
16281822247
17301822237
18311822236
19331821226
20351721215
21371720215
22391720205
23411719194
24431719184
25451718174
26461718164
27481717153
28501716143
29511716133
30521716123

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 5:37 AM to 6:01 AM, and sunset from 6:26 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:376:26
212.85:376:24
312.75:386:23
412.75:396:21
512.75:406:20
612.65:416:18
712.65:426:17
812.55:426:15
912.55:436:14
1012.55:446:12
1112.45:456:11
1212.45:466:09
1312.45:466:08
1412.35:476:06
1512.35:486:04
1612.25:496:03
1712.25:506:01
1812.25:516:00
1912.15:515:58
2012.15:525:57
2112.05:535:55
2212.05:545:53
2311.95:555:52
2411.95:565:50
2511.95:575:49
2611.85:575:47
2711.85:585:46
2811.75:595:44
2911.76:005:42
3011.76:015:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.86 kWh/m².

For context, solar energy here swings from a low near 2.07 kWh/m² to a high of 6.52 kWh/m² in June across the year — September's 4.86 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.3Bright
35.3Bright
45.3Bright
55.2Bright
65.2Bright
75.2Bright
85.1Bright
95.1Bright
105.0Bright
115.0Bright
125.0Bright
134.9Bright
144.9Bright
154.8Bright
164.8Bright
174.8Bright
184.7Bright
194.7Bright
204.7Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
Planning a trip in September

Is September a good time to visit Poplar Bluff?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.6
Sightseeing
2nd-best month of the year
7.2
Beach & pool
1st-best month of the year

September is a reasonable time to visit Poplar Bluff for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Poplar Bluff in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Poplar Bluff sees daytime highs around 82°F and nights near 62°F. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Poplar Bluff in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Poplar Bluff peaks around June 20 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 20UV 10Dec 22UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May8Very high
Jun10Very high
Jul9Very high
Aug8Very high
Sep7High
Oct4Moderate
Nov4Moderate
Dec2Moderate

Air quality in Poplar Bluff in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Poplar Bluff is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (November, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodJul 1317 µg/m³Nov 237 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb9Good
Mar13Moderate
Apr10Good
May13Moderate
Jun16Moderate
Jul17Moderate
Aug13Moderate
Sep11Good
Oct9Good
Nov7Good
Dec7Good
Location & terrain

Where is Poplar Bluff?

Poplar Bluff sits at 36.8°N, 90.4°W, 361 ft above sea level, in United States. The nearest listed city is Sikeston, 45 mi away.

Topography around Poplar Bluff

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Poplar Bluff.

Within 2 miles, the terrain around Poplar Bluff has only modest variations in elevation — a maximum elevation change of 164 ft around an average of 361 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 344 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,270 ft.

The land around Poplar Bluff is covered by trees (50%) within 2 miles, trees (45%) and cropland (40%) within 10 miles, and trees (50%) and cropland (40%) within 50 miles.

2 miles
164 ft
10 miles
344 ft
50 miles
1,270 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Sikeston 45 mi · Paragould 48 mi · Cape Girardeau 62 mi · Jonesboro 65 mi · Farmington 71 mi · Dyersburg 75 mi · Carbondale 93 mi · Paducah 101 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Poplar Bluff (36.757°, -90.3929°, elevation 361 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).