Owatonna weather in September

In September, Owatonna sees average daytime highs of 71°F and overnight lows near 52°F, with 3.5 in of rain across 8.8 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 76°F in the first days to 66°F by the end. The sky is clear or mostly clear about 41% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Owatonna's 1st-clearest and 9th-windiest month. For the whole year in context, see Owatonna's year-round climate.

Daytime high
71°
4th warmest
Overnight low
52°
9th coldest
Rainfall
3.5 in
8.8 wet days
Daylight
12 h 18 min
5:58 AM – 6:16 PM
Cloud cover
49%
1st clearest
Wind
10 mph
9th windiest
Solar energy
4.32 kWh/m²
Travel score
6.9
out of 10

Owatonna is city in Minnesota, USA.

Density
669/km²
people per km²
Founded
1854

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 76°F in the first days to 66°F by the end.

A typical September day in Owatonna reaches about 71°F in the afternoon and slips back to 52°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 82°F. Set against its neighbours, September runs about 7°F cooler than August and about 14°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17658
27657
37657
47557
57556
67556
77456
87455
97455
107355
117354
127354
137253
147253
157153
167152
177152
187051
197051
206951
216950
226950
236849
246849
256748
266748
276747
286647
296646
306546

How September really feels in Owatonna

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.

Owatonna weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan23° / 1.16.36.29.10.0
Feb27° / 12°1.15.55.210.20.0
Mar40° / 24°2.38.24.211.60.5
Apr56° / 37°3.711.52.113.23.5
May67° / 49°4.712.90.114.55.7
Jun77° / 59°5.412.8015.26.3
Jul80° / 63°4.3100156.7
Aug78° / 60°4.210013.86.9
Sep71° / 52°3.58.8012.36.9
Oct58° / 40°2.68.50.610.84.4
Nov42° / 27°1.96.83.59.40.6
Dec28° / 14°1.47.16.28.80.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 42%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16436
26337
36337
46436
56337
66337
76238
86238
96139
106139
115941
125842
135842
145644
155545
165545
175545
185446
195446
205446
215446
225446
235446
245545
255545
265545
275644
285644
295644
305644

Chance of precipitation in September

Any precipitation

Owatonna gets around 3.5 in of rain over 8.8 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 30% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
128
228
328
428
528
628
728
829
929
1029
1130
1230
1330
1431
1531
1631
1732
1832
1932
2032
2131
2231
2331
2430
2530
2630
2730
2830
2929
3029

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 61% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1342420174
2372419163
3392419153
4412418143
5442317132
6462317122
7482216112
8502216112
9512116102
1054211591
1154211591
1257201481
1357201481
1459201371
1561191370
1663191260
1763191260
1866181150
1967171150
2068171050
217116940
227215940
237415830
247614730
257813630
267913620
278112520
288211520
298410420
30859420

Wind in September

Winds average 10 mph in September.

Across September, daily wind ranges from about 9 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 90 minutes over September. Sunrise moves from 5:41 AM to 6:15 AM, and sunset from 6:45 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:416:45
213.05:426:43
313.05:436:41
412.95:446:39
512.95:456:37
612.85:466:35
712.85:486:33
812.75:496:32
912.75:506:30
1012.65:516:28
1112.65:526:26
1212.55:546:24
1312.55:556:22
1412.45:566:20
1512.45:576:18
1612.35:586:16
1712.25:596:14
1812.26:016:12
1912.16:026:10
2012.16:036:08
2112.06:046:07
2212.06:056:05
2311.96:076:03
2411.96:086:01
2511.86:095:59
2611.86:105:57
2711.76:115:55
2811.76:135:53
2911.66:145:51
3011.66:155:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.32 kWh/m².

For context, solar energy here swings from a low near 1.57 kWh/m² to a high of 6.36 kWh/m² in July across the year — September's 4.32 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
44.9Bright
54.9Bright
64.8Bright
74.8Bright
84.7Bright
94.6Bright
104.6Bright
114.5Bright
124.5Bright
134.4Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.1Bright
194.1Bright
204.0Bright
214.0Moderate
223.9Moderate
233.9Moderate
243.9Moderate
253.8Moderate
263.8Moderate
273.7Moderate
283.7Moderate
293.7Moderate
303.6Moderate
Planning a trip in September

Hazard calendar for Owatonna

In seasonPeak

In September, Owatonna sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Owatonna's rainy season runs April–October, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Owatonna?

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

6.9
Sightseeing
1st-best month of the year
4.6
Beach & pool
4th-best month of the year

September is a reasonable time to visit Owatonna for sightseeing.

What to pack for Owatonna in September

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

In September, Owatonna sees daytime highs around 71°F and nights near 52°F. Worth packing: rain gear. About 9 days see rain.

rain gear

UV index in Owatonna in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Owatonna peaks around June 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 16UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr5High
May7Very high
Jun9Very high
Jul7High
Aug7Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low
Location & terrain

Where is Owatonna?

Owatonna sits at 44.1°N, 93.2°W, 1,152 ft above sea level, in United States. The nearest listed city is Faribault, 15 mi away.

Topography around Owatonna

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

Within 2 miles, the terrain around Owatonna has only modest variations in elevation — a maximum elevation change of 210 ft around an average of 1,188 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 325 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 843 ft.

The land around Owatonna is covered by trees (36%), artificial surfaces (28%) and grassland (23%) within 2 miles, cropland (76%) within 10 miles, and cropland (74%) within 50 miles.

2 miles
210 ft
10 miles
325 ft
50 miles
843 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Faribault 15 mi · Northfield 26 mi · Albert Lea 31 mi · Austin 32 mi · Rochester 38 mi · Farmington 39 mi · Lakeville 39 mi · Mankato 39 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 Owatonna (44.0838°, -93.226°, elevation 1,152 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).