Brantford weather in September

In September, Brantford sees average daytime highs of 21°C and overnight lows near 11°C, with 78 mm of rain across 9.5 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 24°C in the first days to 19°C by the end. The sky is clear or mostly clear about 34% 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 Brantford's 3rd-clearest and 10th-windiest month. For the whole year in context, see Brantford's year-round climate.

Daytime high
21°
4th warmest
Overnight low
11°
9th coldest
Rainfall
78 mm
9.5 wet days
Daylight
12 h 18 min
6:07 AM – 6:24 PM
Cloud cover
56%
3rd clearest
Wind
11 km/h
10th windiest
Solar energy
4.15 kWh/m²
Travel score
6.6
out of 10

Brantford is city in Ontario, Canada.

Air quality
Good
PM2.5 7 µg/m³ · 2019
Density
1,445/km²
people per km²
Founded
1877

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 24°C in the first days to 19°C by the end.

A typical September day in Brantford reaches about 21°C in the afternoon and slips back to 11°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 27°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)
12414
22414
32413
42413
52313
62313
72313
82313
92312
102312
112212
122212
132212
142211
152211
162111
172111
182111
192110
202110
212010
222010
23209
24209
25199
26199
27199
28198
29188
30188

How September really feels in Brantford

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.

Brantford 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-1° / -9°6510.88.59.20.0
Feb-0° / -9°538.56.610.20.0
Mar / -4°649.94.911.60.4
Apr12° / 8711.81.913.13.1
May19° / 8711.6014.45.7
Jun24° / 13°9411.5015.16.6
Jul26° / 16°8310.8014.96.6
Aug25° / 15°759.6013.86.9
Sep21° / 11°789.5012.36.6
Oct14° / 77110.210.84.0
Nov / -0°71102.89.51.0
Dec / -5°6310.278.90.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% 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 50%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25446
35446
45446
55446
65446
75347
85347
95248
105248
115149
125050
135050
145050
155050
165050
175050
184951
194951
204951
214951
224951
234852
244852
254852
264852
274753
284753
294753
304753

Chance of precipitation in September

Any precipitation

Brantford gets around 78 mm of rain over 9.5 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 31% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
129
230
330
431
531
631
732
832
932
1032
1131
1231
1331
1430
1530
1630
1729
1829
1929
2029
2130
2230
2331
2432
2533
2634
2735
2836
2936
3036

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 59% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1362919142
2382918142
3392817132
4412817132
5432816122
6442716111
7462715111
8482615101
9492515101
1050251591
1153241481
1253241481
1355231471
1456231470
1559221360
1659221360
1761211350
1862201350
1965191240
2065191240
2167181230
2269171130
2370161130
2472161020
2573151020
267415920
277614910
287714810
297813810
307913710

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012light 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 5:50 AM to 6:23 AM, and sunset from 6:52 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:506:52
213.05:516:50
312.95:526:48
412.95:536:46
512.85:546:45
612.85:556:43
712.75:576:41
812.75:586:39
912.65:596:37
1012.66:006:35
1112.56:016:33
1212.56:026:32
1312.46:036:30
1412.46:046:28
1512.36:066:26
1612.36:076:24
1712.26:086:22
1812.26:096:20
1912.16:106:18
2012.16:116:17
2112.06:126:15
2212.06:146:13
2311.96:156:11
2411.96:166:09
2511.86:176:07
2611.86:186:05
2711.76:196:03
2811.76:206:02
2911.66:226:00
3011.66:235:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.15 kWh/m².

For context, solar energy here swings from a low near 1.34 kWh/m² to a high of 6.29 kWh/m² in June across the year — September's 4.15 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.6Bright
54.6Bright
64.5Bright
74.5Bright
84.4Bright
94.4Bright
104.3Bright
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 Brantford?

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

6.6
Sightseeing
2nd-best month of the year
4.2
Beach & pool
4th-best month of the year

September is a reasonable time to visit Brantford for sightseeing.

What to pack for Brantford in September

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

In September, Brantford sees daytime highs around 21°C and nights near 11°C. Worth packing: rain gear. About 10 days see rain.

rain gear

Sea temperature near Brantford in September

The nearest coast averages about 21°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 43 km away) is warmest in August at about 23°C and coldest in February near 1°C.

It's comfortable for a long swim from Jul 8 to Sep 18 — about 2.4 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan3Bracing
Feb1Bracing
Mar1Bracing
Apr3Bracing
May9Bracing
Jun17Cool
Jul21Refreshing
Aug23Refreshing
Sep21Refreshing
Oct15Cool
Nov10Bracing
Dec6Bracing

UV index in Brantford 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 Brantford peaks around June 23 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May6High
Jun9Very high
Jul8Very high
Aug7High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Brantford?

Brantford sits at 43.1°N, 80.3°W, 200 m above sea level, in Canada. The nearest listed city is Brant, 7.0 km away.

Topography around Brantford

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

Within 3 km, the terrain around Brantford has only modest variations in elevation — a maximum elevation change of 56 m around an average of 213 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 152 m; within 80 km, significant variations in elevation — a maximum elevation change of 436 m.

The land around Brantford is covered by trees (37%) and artificial surfaces (36%) within 3 km, cropland (49%) and trees (30%) within 16 km, and cropland (44%), water (23%) and trees (21%) within 80 km.

3 km
56 m
16 km
152 m
80 km
436 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Brant 7.0 km · Christopher-Champlain 24 km · Ancaster 25 km · Cambridge 25 km · Fiddlesticks 29 km · Hespeler 34 km · Norfolk County 35 km · Hamilton 36 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 Brantford (43.1334°, -80.2664°, elevation 200 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).