Charlottetown weather in September

In September, Charlottetown sees average daytime highs of 19°C and overnight lows near 12°C, with 94 mm of rain across 10.3 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 16°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 12 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Charlottetown's 2nd-clearest and 8th-windiest month. For the whole year in context, see Charlottetown's year-round climate.

Daytime high
19°
4th warmest
Overnight low
12°
10th coldest
Rainfall
94 mm
10.3 wet days
Daylight
12 h 18 min
5:57 AM – 6:17 PM
Cloud cover
59%
2nd clearest
Wind
18 km/h
8th windiest
Solar energy
4.01 kWh/m²
Travel score
5.9
out of 10

Charlottetown is capital city of the province of Prince Edward Island, Canada.

Air quality
Good
PM2.5 8 µg/m³ · 2019
Density
875/km²
people per km²
Founded
1764

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 21°C in the first days to 16°C by the end.

A typical September day in Charlottetown reaches about 19°C in the afternoon and slips back to 12°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 23°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12114
22114
32114
42014
52013
62013
72013
82013
92013
101913
111913
121912
131912
141912
151912
161912
171812
181811
191811
201811
211811
221811
231711
241710
251710
261710
271710
281610
291610
301610

How September really feels in Charlottetown

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.

Charlottetown weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-3° / -10°8711.910.38.80.0
Feb-3° / -10°7910.29.2100.0
Mar / -6°8511.58.111.60.0
Apr / 79124.413.30.9
May13° / 7811.40.414.73.6
Jun19° / 11°8411.1015.55.7
Jul23° / 16°7210.7015.26.6
Aug23° / 16°8010.70146.7
Sep19° / 12°9410.3012.35.9
Oct13° / 9911.60.210.73.2
Nov / 10111.43.59.20.7
Dec / -5°10913.18.88.50.0

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 15% of September, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15050
25050
34852
44852
54852
64951
74852
84753
94753
104654
114753
124654
134654
144555
154654
164654
174654
184654
194654
204654
214654
224555
234555
244555
254456
264456
274357
284357
294357
304258

Chance of precipitation in September

Any precipitation

Charlottetown gets around 94 mm of rain over 10.3 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 36% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
132
232
333
433
533
634
734
834
934
1034
1134
1234
1334
1434
1534
1634
1734
1834
1934
2034
2135
2235
2335
2435
2535
2636
2736
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 62% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14132206
24332206
34431196
44631186
54730176
64929165
75029165
85228155
95228155
105527144
115626144
125725144
135924143
146123133
156222133
166421132
176421132
186520132
196719122
206819121
217018111
227018111
237217101
247117102
25731692
26741682
27761572
28781471
29791461
30811351

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 17 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
117light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 12 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 102 minutes over September. Sunrise moves from 5:38 AM to 6:16 AM, and sunset from 6:47 PM to 5:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:386:47
213.15:396:45
313.05:406:43
413.05:426:41
512.95:436:39
612.95:446:37
712.85:456:35
812.85:476:33
912.75:486:31
1012.75:496:29
1112.65:516:27
1212.55:526:25
1312.55:536:23
1412.45:556:21
1512.45:566:19
1612.35:576:17
1712.35:586:14
1812.26:006:12
1912.26:016:10
2012.16:026:08
2112.06:046:06
2212.06:056:04
2311.96:066:02
2411.96:086:00
2511.86:095:58
2611.86:105:56
2711.76:125:54
2811.66:135:52
2911.66:145:50
3011.56:165:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.01 kWh/m².

For context, solar energy here swings from a low near 1.14 kWh/m² to a high of 6.21 kWh/m² in June across the year — September's 4.01 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.7Bright
34.7Bright
44.6Bright
54.5Bright
64.5Bright
74.4Bright
84.4Bright
94.3Bright
104.3Bright
114.2Bright
124.2Bright
134.1Bright
144.1Bright
154.0Bright
164.0Moderate
173.9Moderate
183.9Moderate
193.8Moderate
203.8Moderate
213.8Moderate
223.7Moderate
233.6Moderate
243.6Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.4Moderate
293.4Moderate
303.3Moderate
Planning a trip in September

Is September a good time to visit Charlottetown?

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

5.9
Sightseeing
3rd-best month of the year
2.3
Beach & pool
4th-best month of the year

September is a reasonable time to visit Charlottetown for sightseeing.

What to pack for Charlottetown in September

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

In September, Charlottetown sees daytime highs around 19°C and nights near 12°C. Worth packing: rain gear. About 10 days see rain.

rain gear

Sea temperature near Charlottetown in September

The nearest coast averages about 17°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 19°C and coldest in February near -1°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan0Bracing
Feb-1Bracing
Mar-1Bracing
Apr1Bracing
May5Bracing
Jun11Bracing
Jul17Cool
Aug19Cool
Sep17Cool
Oct13Bracing
Nov8Bracing
Dec2Bracing

UV index in Charlottetown 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 Charlottetown peaks around June 20 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 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 20UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr4Moderate
May6High
Jun8Very high
Jul7Very high
Aug6High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Charlottetown?

Charlottetown sits at 46.2°N, 63.1°W, 14 m above sea level, in Canada. The nearest listed city is New Glasgow, 81 km away.

Topography around Charlottetown

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

Within 3 km, the terrain around Charlottetown has only modest variations in elevation — a maximum elevation change of 49 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 111 m; within 80 km, significant variations in elevation — a maximum elevation change of 361 m.

The land around Charlottetown is covered by water (45%) and grassland (21%) within 3 km, water (30%), grassland (25%) and trees (21%) within 16 km, and water (58%) and trees (26%) within 80 km.

3 km
49 m
16 km
111 m
80 km
361 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: New Glasgow 81 km · Dieppe 122 km · Moncton 130 km · Riverview 132 km · Lutes Mountain 137 km · Lower Sackville 168 km · Bedford 173 km · Cole Harbour 176 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 Charlottetown (46.2346°, -63.1256°, elevation 14 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).