Owasso weather in September

In September, Owasso sees average daytime highs of 83°F and overnight lows near 64°F, with 4.1 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 53% 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 Owasso's 1st-clearest and 10th-windiest month. For the whole year in context, see Owasso's year-round climate.

Daytime high
83°
4th warmest
Overnight low
64°
9th coldest
Rainfall
4.1 in
7.6 wet days
Daylight
12 h 12 min
6:11 AM – 6:25 PM
Cloud cover
41%
1st clearest
Wind
7 mph
10th windiest
Solar energy
4.96 kWh/m²
Travel score
6.3
out of 10

Owasso is city in the Rogers and Tulsa counties, Oklahoma, United States.

Density
818/km²
people per km²
Founded
1904

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 Owasso reaches about 83°F in the afternoon and slips back to 64°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
28869
38869
48869
58768
68768
78668
88667
98567
108567
118566
128466
138465
148365
158365
168364
178264
188264
198263
208263
218162
228162
238161
248061
258060
268060
277960
287959
297959
307858

How September really feels in Owasso

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.

Owasso 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
Jan47° / 30°2.05.91.39.81.8
Feb52° / 33°2.16.51.310.63.1
Mar62° / 42°3.79.40.811.75.3
Apr70° / 51°5.010.5012.96.5
May78° / 61°6.012.4013.96.3
Jun87° / 70°4.610.2014.44.8
Jul92° / 74°3.28.2014.23.7
Aug91° / 72°2.96.9013.44.0
Sep83° / 64°4.17.6012.26.3
Oct72° / 52°3.98.3011.17.3
Nov60° / 42°2.670.410.15.2
Dec50° / 33°2.46.41.39.62.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% 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
56733
66634
76634
86535
96337
106337
116337
126337
136337
146238
156238
166337
176337
186436
196535
206634
216733
226931
237030
247129
257228
267228
277327
287327
297426
307426

Chance of precipitation in September

Any precipitation

Owasso gets around 4.1 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 25% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
124
224
325
425
525
626
726
826
927
1027
1127
1227
1327
1427
1528
1627
1727
1827
1927
2026
2126
2225
2324
2424
2523
2623
2722
2822
2922
3022

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 39% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
159244022
2610243921
3711253820
4812253719
5913253618
61014253517
71114253516
81215243415
91316243414
101416233413
111517233312
121617233311
131718223310
14181822329
15201821329
16211921318
17231921307
18251920297
19271820287
20291820276
21311820266
22331819245
23351819225
24381819215
25401818195
26421818184
27441818174
28461817154
29481817143
30491817133

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
97calm
107calm
117calm
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
212.86:006:46
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
1012.56:066:34
1112.46:076:32
1212.46:086:31
1312.36:096:29
1412.36:096:28
1512.36:106:26
1612.26:116:25
1712.26:126:23
1812.16:136:21
1912.16:136:20
2012.16:146:18
2112.06:156:17
2212.06:166:15
2312.06:176:14
2411.96:176:12
2511.96:186:11
2611.86:196:09
2711.86:206:08
2811.86:216:06
2911.76:226:04
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 4.96 kWh/m².

For context, solar energy here swings from a low near 2.27 kWh/m² to a high of 6.73 kWh/m² in July across the year — September's 4.96 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
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in September

Is September a good time to visit Owasso?

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

6.3
Sightseeing
3rd-best month of the year
7.3
Beach & pool
1st-best month of the year

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

What to pack for Owasso in September

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

In September, Owasso sees daytime highs around 83°F and nights near 64°F. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in Owasso 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 Owasso peaks around June 23 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 23UV 10Dec 22UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr8Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep7Very high
Oct5High
Nov4Moderate
Dec2Moderate

Air quality in Owasso 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 Owasso 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 Owasso?

Owasso sits at 36.3°N, 95.9°W, 610 ft above sea level, in United States. The nearest listed city is Tulsa, 11 mi away.

Topography around Owasso

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

Within 2 miles, the terrain around Owasso has only modest variations in elevation — a maximum elevation change of 184 ft around an average of 620 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 436 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 794 ft.

The land around Owasso is covered by trees (36%), grassland (31%) and artificial surfaces (28%) within 2 miles, grassland (42%) and trees (39%) within 10 miles, and grassland (50%) and trees (41%) within 50 miles.

2 miles
184 ft
10 miles
436 ft
50 miles
794 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Tulsa 11 mi · Claremore 14 mi · Broken Arrow 16 mi · Sand Springs 17 mi · Jenks 18 mi · Bixby 23 mi · Sapulpa 24 mi · Bartlesville 34 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 Owasso (36.2695°, -95.8547°, elevation 610 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).