Broken Arrow weather in September

In September, Broken Arrow sees average daytime highs of 83°F and overnight lows near 65°F, with 4.0 in of rain across 7.6 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 88°F in the first days to 79°F by the end. The sky is clear or mostly clear about 54% of the time in September, and the air most often feels muggy.

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 Broken Arrow's 1st-clearest and 10th-windiest month. For the whole year in context, see Broken Arrow's year-round climate.

Daytime high
83°
4th warmest
Overnight low
65°
9th coldest
Rainfall
4.0 in
7.6 wet days
Daylight
12 h 12 min
6:11 AM – 6:24 PM
Cloud cover
41%
1st clearest
Wind
7 mph
10th windiest
Solar energy
4.97 kWh/m²
Travel score
6.2
out of 10

Broken Arrow is city in Oklahoma, United States of America.

Density
662/km²
people per km²
Founded
1902

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 88°F in the first days to 79°F by the end.

A typical September day in Broken Arrow reaches about 83°F in the afternoon and slips back to 65°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 74°F and 92°F. Set against its neighbours, September runs about 8°F cooler than August and about 11°F warmer than October.

40°60°80°100°151015202530
Avg high (°F)Avg low (°F)
18970
28970
38869
48869
58769
68768
78768
88667
98667
108567
118566
128566
138466
148465
158365
168365
178364
188264
198263
208263
218262
228162
238162
248161
258061
268060
278060
287959
297959
307959

How September really feels in Broken Arrow

Once humidity and wind are folded in, September averages 3 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
3
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Broken Arrow weather by month

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan48° / 31°2.16.31.69.82.0
Feb53° / 34°2.26.61.210.63.3
Mar62° / 43°3.89.80.711.75.4
Apr71° / 51°5.010.5012.96.5
May79° / 61°5.912.3013.96.3
Jun87° / 70°4.59.7014.44.8
Jul92° / 74°3.17.6014.23.7
Aug91° / 72°2.86.9013.44.0
Sep83° / 65°4.07.6012.26.2
Oct72° / 53°3.88.2011.17.3
Nov60° / 42°2.77.10.410.15.3
Dec50° / 33°2.56.51.29.62.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% 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 33%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17030
27030
36931
46832
56832
66733
76634
86535
96436
106436
116436
126337
136337
146337
156238
166238
176238
186337
196337
206436
216535
226634
236832
246931
257030
267228
277228
287327
297327
307426

Chance of precipitation in September

Any precipitation

Broken Arrow gets around 4.0 in of rain over 7.6 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 26% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
124
225
325
426
526
626
727
827
927
1027
1128
1228
1328
1428
1528
1628
1728
1828
1927
2027
2126
2225
2324
2424
2523
2622
2722
2821
2921
3021

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 40% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
159224124
269224023
3710233921
4811233820
5912233719
61012243618
71113243517
81214243516
91314233415
101415233414
111515233413
121616233312
131716223311
141817223311
152017223210
16211721319
17231721309
18241721298
19261721287
20281721277
21301720267
22331720246
23351720236
24371720215
25391720195
26411719185
27431619175
28451619164
29471619154
30481618144

Wind in September

Winds average 7 mph in September.

Across September, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:59 AM to 6:22 AM, and sunset from 6:47 PM to 6:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:596:47
212.86:006:45
312.76:006:44
412.76:016:43
512.76:026:41
612.66:036:40
712.66:046:38
812.56:046:37
912.56:056:35
1012.56:066:33
1112.46:076:32
1212.46:086:30
1312.36:086:29
1412.36:096:27
1512.36:106:26
1612.26:116:24
1712.26:126:23
1812.16:126:21
1912.16:136:20
2012.16:146:18
2112.06:156:17
2212.06:166:15
2312.06:166:13
2411.96:176:12
2511.96:186:10
2611.86:196:09
2711.86:206:07
2811.86:206:06
2911.76:216:04
3011.76:226:03

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.97 kWh/m².

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 6.73 kWh/m² in July across the year — September's 4.97 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.5Bright
35.5Bright
45.4Bright
55.4Bright
65.3Bright
75.3Bright
85.2Bright
95.2Bright
105.1Bright
115.1Bright
125.0Bright
135.0Bright
145.0Bright
154.9Bright
164.9Bright
174.9Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.6Bright
304.6Bright
Planning a trip in September

Is September a good time to visit Broken Arrow?

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

6.2
Sightseeing
4th-best month of the year
7.3
Beach & pool
1st-best month of the year

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

What to pack for Broken Arrow in September

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

In September, Broken Arrow sees daytime highs around 83°F and nights near 65°F. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in Broken Arrow in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Broken Arrow peaks around July 11 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highHighModerateJul 11UV 10Dec 21UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr8Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct5High
Nov4Moderate
Dec2Moderate

Air quality in Broken Arrow 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 Broken Arrow is worst in July — around 17 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (November, 5 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1716 µg/m³Nov 165 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb8Good
Mar13Moderate
Apr13Moderate
May12Good
Jun14Moderate
Jul17Moderate
Aug14Moderate
Sep10Good
Oct6Good
Nov5Good
Dec6Good
Location & terrain

Where is Broken Arrow?

Broken Arrow sits at 36.1°N, 95.8°W, 755 ft above sea level, in United States. The nearest listed city is Bixby, 9.3 mi away.

Topography around Broken Arrow

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

Within 2 miles, the terrain around Broken Arrow has only modest variations in elevation — a maximum elevation change of 213 ft around an average of 732 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 390 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 814 ft.

The land around Broken Arrow is covered by artificial surfaces (42%), trees (29%) and grassland (25%) within 2 miles, trees (37%), grassland (33%) and artificial surfaces (21%) within 10 miles, and trees (46%) and grassland (45%) within 50 miles.

2 miles
213 ft
10 miles
390 ft
50 miles
814 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Bixby 9.3 mi · Jenks 9.9 mi · Tulsa 13 mi · Owasso 16 mi · Sapulpa 19 mi · Sand Springs 19 mi · Claremore 21 mi · Muskogee 32 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 Broken Arrow (36.0526°, -95.7908°, elevation 755 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).