Stratford weather in September

In September, Stratford sees average daytime highs of 21°C and overnight lows near 10°C, with 89 mm of rain across 10.2 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 18°C by the end. The sky is clear or mostly clear about 33% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Stratford's 3rd-clearest and 10th-windiest month. For the whole year in context, see Stratford's year-round climate.

Daytime high
21°
4th warmest
Overnight low
10°
9th coldest
Rainfall
89 mm
10.2 wet days
Daylight
12 h 18 min
6:09 AM – 6:27 PM
Cloud cover
56%
3rd clearest
Wind
12 km/h
10th windiest
Solar energy
4.16 kWh/m²
Travel score
6.4
out of 10

Stratford is city in Ontario, Canada.

Density
1,435/km²
people per km²
Founded
1859

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 23°C in the first days to 18°C by the end.

A typical September day in Stratford reaches about 21°C in the afternoon and slips back to 10°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 15°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
32313
42313
52312
62312
72212
82212
92212
102212
112211
122211
132111
142111
152111
162110
172110
182010
192010
202010
21209
22199
23199
24199
25199
26188
27188
28188
29188
30178

How September really feels in Stratford

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.

Stratford weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-2° / -9°7512.3119.20.0
Feb-1° / -10°599.68.910.20.0
Mar / -5°6810.96.411.60.3
Apr12° / 9412.62.613.22.8
May18° / 9912.2014.55.5
Jun23° / 13°10011.9015.26.5
Jul25° / 15°10011.9014.96.6
Aug24° / 14°8110.6013.86.9
Sep21° / 10°8910.2012.36.4
Oct14° / 8811.90.410.83.7
Nov / -1°8012.14.79.50.7
Dec / -6°7112.39.88.80.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 49%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25545
35545
45545
55446
65446
75446
85347
95248
105149
115248
125149
135149
145149
155149
165149
175149
185050
195050
205050
215050
224951
234951
244951
254951
264951
274852
284852
294753
304753

Chance of precipitation in September

Any precipitation

Stratford gets around 89 mm of rain over 10.2 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 34% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
133
233
334
434
534
634
734
834
934
1034
1134
1234
1333
1433
1533
1632
1732
1832
1932
2032
2132
2233
2334
2434
2535
2636
2737
2837
2937
3038

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 6% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1402720122
2412619122
3432618112
4452617111
5462616101
6482516101
749251591
850251591
953241481
1053241481
1155241371
1255241371
1357231370
1459231260
1560221260
1661221250
1763211150
1865201140
1966191140
2067181140
2170171030
2270171030
237316920
247415920
257515820
267614820
277913710
287913710
298012710
308112610

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours 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 84 minutes over September. Sunrise moves from 5:52 AM to 6:26 AM, and sunset from 6:55 PM to 6:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:526:55
213.05:536:53
312.95:556:51
412.95:566:49
512.85:576:47
612.85:586:46
712.75:596:44
812.76:006:42
912.66:016:40
1012.66:026:38
1112.56:046:36
1212.56:056:34
1312.46:066:33
1412.46:076:31
1512.36:086:29
1612.36:096:27
1712.26:116:25
1812.26:126:23
1912.16:136:21
2012.16:146:19
2112.06:156:17
2212.06:166:16
2311.96:176:14
2411.96:196:12
2511.86:206:10
2611.86:216:08
2711.76:226:06
2811.76:236:04
2911.66:246:02
3011.66:266:01

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.16 kWh/m².

For context, solar energy here swings from a low near 1.3 kWh/m² to a high of 6.34 kWh/m² in June across the year — September's 4.16 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.7Bright
34.7Bright
44.6Bright
54.6Bright
64.5Bright
74.5Bright
84.5Bright
94.4Bright
104.4Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.2Bright
164.1Bright
174.1Bright
184.0Bright
194.0Bright
204.0Moderate
213.9Moderate
223.9Moderate
233.8Moderate
243.8Moderate
253.7Moderate
263.7Moderate
273.6Moderate
283.6Moderate
293.5Moderate
303.5Moderate
Planning a trip in September

Is September a good time to visit Stratford?

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

6.4
Sightseeing
4th-best month of the year
3.7
Beach & pool
4th-best month of the year

September is a reasonable time to visit Stratford for sightseeing.

What to pack for Stratford in September

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

In September, Stratford sees daytime highs around 21°C and nights near 10°C. Worth packing: rain gear. About 10 days see rain.

rain gear

UV index in Stratford 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 Stratford peaks around June 23 at about 9 (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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 23UV 9Jan 12UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May7High
Jun9Very high
Jul9Very high
Aug7High
Sep5High
Oct3Moderate
Nov2Low
Dec2Low
Location & terrain

Where is Stratford?

Stratford sits at 43.4°N, 80.9°W, 365 m above sea level, in Canada. The nearest listed city is Woodstock, 31 km away.

Topography around Stratford

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

Within 3 km, the terrain around Stratford has only modest variations in elevation — a maximum elevation change of 40 m around an average of 363 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 115 m; within 80 km, significant variations in elevation — a maximum elevation change of 417 m.

The land around Stratford is covered by cropland (49%) and trees (24%) within 3 km, cropland (75%) within 16 km, and cropland (65%) and trees (22%) within 80 km.

3 km
40 m
16 km
115 m
80 km
417 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Woodstock 31 km · Forest Heights 35 km · Kitchener 36 km · Waterloo 37 km · London 48 km · Cambridge 52 km · Hespeler 52 km · Christopher-Champlain 52 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 Stratford (43.3668°, -80.9497°, elevation 365 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. 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).