Charlottetown weather in September
September in Charlottetown: nice, rainy, with clean air — an excellent time to visit.
Updated September 2026 · climate normals from ERA5 reanalysis
#4 of 12 months in Charlottetown · #604 of 1413 destinations to visit in September · comfort 82/100 (tier A)
- Days
- 21°C
- Nights
- 11°C
- Wet days
- 9
- Sun
- 9 h
- Humidity
- 77%
- Daylight
- 13 h
Traveller notes on Charlottetown in September
Other months in Charlottetown
Forum posters describe December in Charlottetown as starting with snow early in the month before shifting toward cold rain as the month progresses toward Christmas. Posters cite typical overnight lows around -10C and daytime highs around -3C for the December-through-March stretch, with a winter storm passing through roughly every three days on average - about half bringing rain, half bringing snow, making the odds of a white Christmas roughly 50-50. Posters note daytime highs stay below freezing on about half of December's days, with nights almost always below freezing except during a rain event with southerly winds. Posters are direct that most tourist-oriented businesses close for the season, though core city services, lodging and dining in Charlottetown itself remain reliably open year-round. Posters generally rate December as genuinely cold and snow-capable, workable for a visit focused on the city itself rather than seasonal tourist attractions.
Forum posters put June daytime highs around 21C and overnight lows near 12C, but note a south wind can push afternoons into the 80s F while a cold snap can still drop nights into the 40s F - below freezing has happened in the first week of June, though it's rare. Many tourist businesses don't fully open until mid-June, with mid-to-late June bringing Green Gables, beaches, shops and the Lobster Suppers into full swing. Two practical warnings repeated often: the sea is only around 10C so swimming is mostly out, and June is peak mosquito season - 'June is buggy' is the recurring phrase.
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Charlottetown climate normals — September
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Charlottetown in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsCruise ship calls, Summer break in Canada(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Charlottetown's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherCharlottetown's weather peaks June–August.
Best weatherFair weatherToughest weather
What's on in Charlottetown in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Festival
Charlottetown Festival
25 Jun – 26 SepArts festivalBook earlyThe Confederation Centre's summer theatre season, running from late June into late September, built around the Anne of Green Gables musical that has played here since the 1960s. Matinees sell out before the evening shows do. Source ↗
- Season
Cruise ship calls
1 Sep – 31 Oct · usuallyCruise seasonCrowdedThe port takes most of its calls in September and October, when the Canada and New England itineraries come through — around three dozen ships in two months into a city of forty thousand. Victoria Row is quiet again by five. Source ↗
- Festival
Fall Flavours
24 Sep – 10 OctHarvestBook earlyThree weeks of shellfish suppers, kitchen parties and chef dinners staged across the island, with Charlottetown the base most people book. The signature events go early; the small ones in the fishing villages are the better ticket. Source ↗
Nearby, and something's on
Within 300 km of Charlottetown — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Charlottetown?
Charlottetown in September — FAQ
- Is September a good time to visit Charlottetown?
- September in Charlottetown: nice, rainy, with clean air — an excellent time to visit. It ranks #4 of 12 months for Charlottetown on SeasonMap's comfort score (82/100).
- What is the weather like in Charlottetown in September?
- In September, Charlottetown averages a daily high of 21.4°C and a low of 10.9°C, with about 94.3 mm of rain over roughly 8.6 rainy days.
- What is the air quality in Charlottetown in September?
- Charlottetown has a mean US Air Quality Index of about 37 in September.
Within 300 km: Halifax's Cruise season on 1 Sep – 31 Oct.