Owen Sound weather in September

In September, Owen Sound sees average daytime highs of 20°C and overnight lows near 11°C, with 88 mm of rain across 11.6 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 17°C by the end. The sky is clear or mostly clear about 31% 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 Owen Sound's 4th-clearest and 9th-windiest month. For the whole year in context, see Owen Sound's year-round climate.

Daytime high
20°
4th warmest
Overnight low
11°
9th coldest
Rainfall
88 mm
11.6 wet days
Daylight
12 h 18 min
6:09 AM – 6:27 PM
Cloud cover
58%
4th clearest
Wind
12 km/h
9th windiest
Solar energy
4.14 kWh/m²
Travel score
6.1
out of 10

Owen Sound is city in Ontario, Canada.

Founded
1857

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 22°C in the first days to 17°C by the end.

A typical September day in Owen Sound reaches about 20°C in the afternoon and slips back to 11°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 26°C. Set against its neighbours, September runs about 4°C cooler than August and about 7°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12313
22313
32213
42213
52213
62212
72212
82212
92112
102112
112112
122111
132111
142111
152011
162011
172011
182010
192010
201910
211910
221910
23199
24189
25189
26189
27189
28188
29178
30178

How September really feels in Owen Sound

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

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
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.

Owen Sound weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-3° / -10°7213.814.890.0
Feb-2° / -10°5410.61110.10.0
Mar / -5°6110.87.211.60.2
Apr11° / 81123.713.22.6
May18° / 8310.50.314.65.6
Jun23° / 12°8610.3015.36.7
Jul25° / 15°9012.20156.7
Aug24° / 14°8911.6013.96.8
Sep20° / 11°8811.6012.36.1
Oct13° / 8814.20.310.73.3
Nov / -0°8313.96.89.40.6
Dec / -5°7415.514.48.70.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25545
35545
45446
55446
65248
75248
85149
95050
105050
114951
124951
134852
144852
154852
164654
174654
184753
194654
204654
214654
224555
234555
244456
254357
264357
274258
284258
294258
304159

Chance of precipitation in September

Any precipitation

Owen Sound gets around 88 mm of rain over 11.6 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 38% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
138
238
338
438
538
638
738
838
938
1037
1137
1237
1336
1436
1536
1636
1736
1836
1937
2037
2138
2239
2339
2440
2541
2642
2742
2843
2943
3043

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 64% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
142291991
243291890
345281790
447281680
549281680
651271570
752271470
853271370
955261360
1056261260
1158251250
1259251150
1359251150
1462241040
1562241040
1664231030
176622930
186721930
196721930
207020820
217119820
227218820
237417720
247616710
257815610
267914610
278113510
288113510
298212510
308411410

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3014light 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 5:51 AM to 6:26 AM, and sunset from 6:56 PM to 6:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:516:56
213.05:526:54
313.05:536:52
412.95:546:50
512.95:566:49
612.85:576:47
712.85:586:45
812.75:596:43
912.76:006:41
1012.66:026:39
1112.66:036:37
1212.56:046:35
1312.56:056:33
1412.46:076:31
1512.46:086:29
1612.36:096:27
1712.36:106:25
1812.26:116:23
1912.16:136:21
2012.16:146:19
2112.06:156:17
2212.06:166:15
2311.96:186:14
2411.96:196:12
2511.86:206:10
2611.86:216:08
2711.76:226:06
2811.76:246:04
2911.66:256:02
3011.66:266:00

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.14 kWh/m².

For context, solar energy here swings from a low near 1.13 kWh/m² to a high of 6.63 kWh/m² in June across the year — September's 4.14 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.8Bright
34.8Bright
44.7Bright
54.7Bright
64.6Bright
74.6Bright
84.5Bright
94.5Bright
104.4Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.1Bright
164.1Bright
174.0Bright
184.0Moderate
193.9Moderate
203.9Moderate
213.8Moderate
223.8Moderate
233.7Moderate
243.7Moderate
253.6Moderate
263.6Moderate
273.5Moderate
283.5Moderate
293.4Moderate
303.4Moderate
Planning a trip in September

Is September a good time to visit Owen Sound?

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

6.1
Sightseeing
4th-best month of the year
3.2
Beach & pool
4th-best month of the year

September is a reasonable time to visit Owen Sound for sightseeing.

What to pack for Owen Sound in September

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

In September, Owen Sound sees daytime highs around 20°C and nights near 11°C. Worth packing: rain gear. About 12 days see rain.

rain gear

Sea temperature near Owen Sound in September

The nearest coast averages about 19°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 26 km away) is warmest in August at about 21°C and coldest in March near 1°C.

It's comfortable for a long swim from Aug 9 to Aug 23 — about 0.5 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan3Bracing
Feb2Bracing
Mar1Bracing
Apr2Bracing
May4Bracing
Jun11Bracing
Jul18Cool
Aug21Refreshing
Sep19Cool
Oct13Bracing
Nov9Bracing
Dec6Bracing

UV index in Owen Sound in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Owen Sound peaks around June 20 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 12 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 20UV 8Jan 12UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5High
May7High
Jun8Very high
Jul8Very high
Aug7High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Owen Sound?

Owen Sound sits at 44.6°N, 80.9°W, 180 m above sea level, in Canada. The nearest listed city is Collingwood, 58 km away.

Topography around Owen Sound

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Owen Sound.

Within 3 km, the terrain around Owen Sound has only modest variations in elevation — a maximum elevation change of 111 m around an average of 222 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 215 m; within 80 km, significant variations in elevation — a maximum elevation change of 371 m.

The land around Owen Sound is covered by trees (45%) within 3 km, trees (48%) and cropland (25%) within 16 km, and water (47%), trees (25%) and cropland (21%) within 80 km.

3 km
111 m
16 km
215 m
80 km
371 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Collingwood 58 km · Wasaga Beach 74 km · Midland 86 km · Alliston 97 km · Orangeville 99 km · Barrie 103 km · Fergus 106 km · Innisfil 107 km

Canada travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 83% of US
price level, 2025
GDP per capita
$55,698
2025
Happiness
6.7 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
2
per 100k, 2023
Road deaths
5.3
per 100k/yr, 2019
Income group
High
World Bank
Religion
Christian 53%none 35%Muslim 5%Hindu 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 Owen Sound (44.5672°, -80.9435°, elevation 180 m), 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).