Burlington weather in September

In September, Burlington sees average daytime highs of 21°C and overnight lows near 13°C, with 75 mm of rain across 9.2 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 23°C in the first days to 18°C by the end. The sky is clear or mostly clear about 35% 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 Burlington's 3rd-clearest and 8th-windiest month. For the whole year in context, see Burlington's year-round climate.

Daytime high
21°
4th warmest
Overnight low
13°
9th coldest
Rainfall
75 mm
9.2 wet days
Daylight
12 h 18 min
6:05 AM – 6:22 PM
Cloud cover
55%
3rd clearest
Wind
13 km/h
8th windiest
Solar energy
4.11 kWh/m²
Travel score
6.6
out of 10

Burlington is city in Halton Region, Ontario, Canada.

Air quality
Good
PM2.5 7 µg/m³ · 2019
Density
1,007/km²
people per km²
Founded
1874

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 Burlington reaches about 21°C in the afternoon and slips back to 13°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 26°C. Set against its neighbours, September runs about 4°C cooler than August and about 7°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12416
22316
32316
42316
52315
62315
72315
82315
92215
102215
112214
122214
132214
142114
152114
162113
172113
182113
192113
202013
212012
222012
232012
241912
251912
261911
271911
281811
291811
301811

How September really feels in Burlington

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.

Burlington 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 (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -7°70118.59.20.0
Feb-0° / -7°558.66.610.20.0
Mar / -3°659.64.911.60.2
Apr10° / 8911.3213.22.3
May16° / 8111014.55.0
Jun22° / 14°8211.3015.26.5
Jul25° / 18°7410.1014.96.8
Aug25° / 17°669.4013.87.1
Sep21° / 13°759.2012.36.6
Oct14° / 8311.10.110.84.0
Nov / 7710.22.69.51.0
Dec / -3°7010.56.38.80.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% 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 47%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35842
45743
55743
65743
75644
85644
95545
105446
115446
125347
135347
145347
155248
165248
175248
185248
195248
205149
215050
225050
235050
244951
254951
264852
274753
284753
294753
304753

Chance of precipitation in September

Any precipitation

Burlington gets around 75 mm of rain over 9.2 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 31% and peaks near 38% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
127
228
328
429
529
629
730
830
930
1030
1130
1229
1329
1429
1529
1629
1729
1829
1929
2029
2130
2231
2332
2433
2534
2635
2736
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 52% 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 (%)
1302825162
2312824152
3322823152
4342822142
5362821132
6372821132
7392820122
8402720111
9422719111
10442619101
1145261991
1247251891
1349251881
1451241870
1552241770
1654231760
1755221760
1857221650
1959211550
2059211550
2162201440
2263191440
2365191330
2467181230
2568181130
2669181120
2771171020
287217920
297316920
307416820

Wind in September

Winds average 13 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
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light 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 5:48 AM to 6:21 AM, and sunset from 6:50 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:486:50
213.05:496:49
312.95:506:47
412.95:516:45
512.85:526:43
612.85:536:41
712.75:556:39
812.75:566:37
912.65:576:36
1012.65:586:34
1112.55:596:32
1212.56:006:30
1312.46:016:28
1412.46:036:26
1512.36:046:24
1612.36:056:22
1712.26:066:21
1812.26:076:19
1912.16:086:17
2012.16:106:15
2112.06:116:13
2212.06:126:11
2311.96:136:09
2411.96:146:07
2511.86:156:05
2611.86:176:04
2711.76:186:02
2811.76:196:00
2911.66:205:58
3011.66:215:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.11 kWh/m².

For context, solar energy here swings from a low near 1.3 kWh/m² to a high of 6.25 kWh/m² in June across the year — September's 4.11 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.6Bright
44.6Bright
54.5Bright
64.5Bright
74.5Bright
84.4Bright
94.4Bright
104.3Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.1Bright
164.1Bright
174.0Bright
184.0Bright
194.0Moderate
203.9Moderate
213.9Moderate
223.8Moderate
233.8Moderate
243.7Moderate
253.7Moderate
263.6Moderate
273.6Moderate
283.5Moderate
293.5Moderate
303.4Moderate
Planning a trip in September

Is September a good time to visit Burlington?

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

6.6
Sightseeing
3rd-best month of the year
4.1
Beach & pool
4th-best month of the year

September is a reasonable time to visit Burlington for sightseeing.

What to pack for Burlington in September

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

In September, Burlington sees daytime highs around 21°C and nights near 13°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Burlington 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 17 km away) is warmest in August at about 21°C and coldest in February near 3°C.

It's comfortable for a long swim from Jul 22 to Sep 1 — about 1.4 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr4Bracing
May8Bracing
Jun15Cool
Jul20Cool
Aug21Refreshing
Sep19Cool
Oct13Bracing
Nov8Bracing
Dec5Bracing

UV index in Burlington 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 Burlington peaks around June 22 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 22UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May6High
Jun8Very high
Jul8Very high
Aug7High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Burlington?

Burlington sits at 43.4°N, 79.8°W, 165 m above sea level, in Canada. The nearest listed city is Waterdown, 7.0 km away.

Topography around Burlington

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

Within 3 km, the terrain around Burlington has only modest variations in elevation — a maximum elevation change of 181 m around an average of 189 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 290 m; within 80 km, significant variations in elevation — a maximum elevation change of 457 m.

The land around Burlington is covered by trees (37%), artificial surfaces (28%) and grassland (23%) within 3 km, trees (32%) and water (20%) within 16 km, and cropland (33%), trees (24%) and water (23%) within 80 km.

3 km
181 m
16 km
290 m
80 km
457 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Waterdown 7.0 km · Oakville 14 km · Milton 15 km · Hamilton 15 km · Stoney Creek 20 km · Ancaster 22 km · Mississauga 26 km · Halton Hills 29 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 Burlington (43.3862°, -79.8371°, elevation 165 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).