South Burlington weather in September

In September, South Burlington sees average daytime highs of 69°F and overnight lows near 53°F, with 3.3 in of rain across 9.8 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 74°F in the first days to 64°F 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 South Burlington's 2nd-clearest and 8th-windiest month. For the whole year in context, see South Burlington's year-round climate.

Daytime high
69°
4th warmest
Overnight low
53°
9th coldest
Rainfall
3.3 in
9.8 wet days
Daylight
12 h 18 min
5:38 AM – 5:56 PM
Cloud cover
57%
2nd clearest
Wind
6 mph
8th windiest
Solar energy
3.92 kWh/m²
Travel score
6.4
out of 10

South Burlington is city in Chittenden County, Vermont, United States.

Density
245/km²
people per km²
Founded
1865

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 74°F in the first days to 64°F by the end.

A typical September day in South Burlington reaches about 69°F in the afternoon and slips back to 53°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 80°F. Set against its neighbours, September runs about 8°F cooler than August and about 13°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17557
27457
37457
47456
57356
67356
77356
87355
97255
107255
117154
127154
137154
147053
157053
167053
176952
186952
196852
206851
216851
226751
236750
246650
256650
266549
276549
286449
296448
306348

How September really feels in South Burlington

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.

South Burlington 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 (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan27° / 13°2.510.19.390.0
Feb29° / 13°2.28.98.110.10.0
Mar38° / 23°2.911711.60.1
Apr53° / 36°3.411.62.713.22.7
May65° / 46°3.411.90.114.65.6
Jun74° / 55°3.812015.36.4
Jul79° / 61°3.311.80156.4
Aug77° / 60°3.111.4013.96.7
Sep69° / 53°3.39.8012.36.4
Oct56° / 42°4.212.40.510.73.6
Nov44° / 32°3.212.549.40.7
Dec33° / 22°3.012.19.38.70.0

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 19% 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 (%)
15644
25545
35446
45446
55347
65347
75248
85248
95149
105149
115149
125050
135050
145050
155050
165050
175050
184951
194951
204951
214852
224852
234852
244753
254753
264753
274555
284555
294555
304555

Chance of precipitation in September

Any precipitation

South Burlington gets around 3.3 in of rain over 9.8 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 33% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
130
230
330
431
531
631
732
832
933
1033
1133
1233
1333
1434
1534
1634
1734
1834
1934
2034
2134
2234
2334
2434
2535
2635
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 58% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1373121111
2393120100
3403020100
441301990
543301980
644301880
745301870
847291860
948291860
1050281750
1151271750
1252271740
1354261640
1455251640
1558241530
1659231530
1761221430
1861221430
1963211330
2065201320
2167191220
2269181120
2369181120
2471171020
257416910
267516810
277715710
287814710
298013610
308112610

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 5:20 AM to 5:55 AM, and sunset from 6:25 PM to 5:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:206:25
213.05:216:23
313.05:226:21
412.95:236:19
512.95:256:17
612.85:266:15
712.85:276:14
812.75:286:12
912.75:296:10
1012.65:316:08
1112.65:326:06
1212.55:336:04
1312.55:346:02
1412.45:356:00
1512.45:375:58
1612.35:385:56
1712.35:395:54
1812.25:405:52
1912.15:425:50
2012.15:435:48
2112.05:445:46
2212.05:455:44
2311.95:465:42
2411.95:485:41
2511.85:495:39
2611.85:505:37
2711.75:515:35
2811.75:535:33
2911.65:545:31
3011.65:555:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.92 kWh/m².

For context, solar energy here swings from a low near 1.18 kWh/m² to a high of 5.89 kWh/m² in July across the year — September's 3.92 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.5Bright
34.5Bright
44.5Bright
54.4Bright
64.3Bright
74.3Bright
84.3Bright
94.2Bright
104.2Bright
114.1Bright
124.1Bright
134.0Bright
144.0Moderate
153.9Moderate
163.9Moderate
173.9Moderate
183.8Moderate
193.8Moderate
203.7Moderate
213.7Moderate
223.6Moderate
233.6Moderate
243.5Moderate
253.5Moderate
263.4Moderate
273.3Moderate
283.3Moderate
293.2Moderate
303.2Moderate
Planning a trip in September

Hazard calendar for South Burlington

In seasonPeak

In September, South Burlington sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

South Burlington sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit South Burlington?

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

6.4
Sightseeing
2nd-best month of the year
3.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit South Burlington for sightseeing.

What to pack for South Burlington in September

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

In September, South Burlington sees daytime highs around 69°F and nights near 53°F. Worth packing: rain gear. About 10 days see rain.

rain gear

UV index in South Burlington 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 South Burlington peaks around July 13 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. 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 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highModerateModerateLowJul 13UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5Moderate
May7High
Jun6High
Jul8Very high
Aug3Moderate
Sep6High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is South Burlington?

South Burlington sits at 44.5°N, 73.2°W, 328 ft above sea level, in United States. The nearest listed city is Burlington, 1.9 mi away.

Topography around South Burlington

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

Within 2 miles, the terrain around South Burlington has only modest variations in elevation — a maximum elevation change of 374 ft around an average of 305 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,473 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,308 ft.

The land around South Burlington is covered by trees (49%) and artificial surfaces (25%) within 2 miles, trees (50%) and water (28%) within 10 miles, and trees (79%) within 50 miles.

2 miles
374 ft
10 miles
1,473 ft
50 miles
5,308 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Burlington 1.9 mi · Colchester 5.6 mi · Plattsburgh 21 mi · Saint-Jean-sur-Richelieu 58 mi · Rutland 60 mi · Saint-Constant 65 mi · Candiac 65 mi · Sainte-Catherine 68 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 South Burlington (44.467°, -73.171°, elevation 328 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).