Kingston Weather in September
Kingston in September sees pleasant temperatures, with highs around 22°C (72°F) and overnight lows of 14°C (57°F). Rainfall is fairly high at around 102 mm (4 in) on average, so pack waterproofs just in case.
Rainfall in Kingston in September
Historically, the month has about 11 days of rain, averaging 102 mm (4 in) in total. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Kingston in September
Kingston in September gets highs of 22°C (72°F) during the day and drops to 14°C (57°F) at night. The difference between afternoon and evening temperatures is usually noticeable. Nights drop to around 14°C (57°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Kingston in September
The month brings about 165 hours of sunlight, offering a comfortable mix of sun and overcast.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Kingston Temperature in September
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Chance of Rain
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Kingston Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Kingston - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Kingston typically drop from around 23°C (73°F) at the start of September to approximately 18°C (64°F) by the end. Nights are cool, with lows typically ranging from 8°C (46°F) to 14°C (57°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Kingston in September
Browse day-by-day weather records for Kingston spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Kingston historical weather extremes in September
According to our 49 years of weather records for Kingston, the following extremes were recorded between 1976 and 2025.
- The hottest September day on record in Kingston reached 31°C (88°F) (September 1, 1977).
- Kingston experienced its chilliest September day on September 30, 1992, reaching only 7°C (45°F).
- The coldest night in September in Kingston was on September 27, 1980, with a minimum of -3°C (27°F).
Best Places in Canada in September
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in September →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Kingston in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
What To Do in Kingston in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming6/10 -
Cycling9/10 -
Walking9/10 -
Camping6/10 -
Outdoor sports9/10
Kingston 3-Day Forecast
See the full Kingston climate overview or explore weather in Canada.
Popular in September
Where to go in September - average daytime high across popular destinations.
Toronto
22°C (72°F) Niagara Falls23°C (73°F) Montréal
22°C (72°F) Ottawa22°C (72°F) Quebec City
20°C (68°F) Vancouver19°C (66°F) Calgary19°C (66°F) Whistler15°C (59°F) 
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