Climate averages 1991–2020
Sydney, Canada weather
in September.
A mild, wet month: the 3rd warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Sydney, Canada: daytime highs average 18.5°C and nights cool to about 13.2°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 104 mm of rain on roughly 11 days, which makes September a wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 36 min on an average September day.
The nearest other city in this atlas is Dartmouth (311 km away). In September its highs average 19.3°C, 0.8°C warmer than Sydney, Canada, with 97 mm of rain.
Among the 86 cities listed in Canada, Sydney, Canada ranks joint 71st of 86 for the warmest September highs and 74th of 86 for the driest September (rainfall, lowest first). The mean September high of those 86 cities is 19.8°C; Sydney, Canada is 1.3°C cooler than that mean.
From September to October, average highs fall by 5.8°C to 12.6°C, and monthly rainfall rises from 104 mm to 131 mm.
The annual picture
September in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Sydney, Canada climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -0.7°C-6.9°C | -6.9°C | 118 | 12.9 | 9.19 h |
| February | -1.2°C-7.9°C | -7.9°C | 111 | 11.3 | 10.310 h |
| March | 1.3°C-5.0°C | -5.0°C | 108 | 12.4 | 11.912 h |
| April | 5.9°C-0.1°C | -0.1°C | 106 | 12.3 | 13.514 h |
| May | 11.5°C4.7°C | 4.7°C | 86 | 11.7 | 14.915 h |
| June | 16.8°C9.9°C | 9.9°C | 89 | 11.0 | 15.716 h |
| July | 21.5°C15.3°C | 15.3°C | 85 | 10.5 | 15.415 h |
| August | 22.0°C16.4°C | 16.4°C | 89 | 10.9 | 14.214 h |
| September, selected | 18.5°C13.2°C | 13.2°C | 104 | 10.5 | 12.613 h |
| October | 12.6°C8.2°C | 8.2°C | 131 | 12.3 | 11.011 h |
| November | 7.4°C3.0°C | 3.0°C | 124 | 12.7 | 9.510 h |
| December | 2.6°C-2.1°C | -2.1°C | 139 | 14.2 | 8.79 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Dartmouth in SeptemberCanada · 311 kmHigh 19.3°C · Low 13.3°C · 97 mm rain
- Halifax in SeptemberCanada · 313 kmHigh 18.6°C · Low 13.7°C · 97 mm rain
- Moncton in SeptemberCanada · 356 kmHigh 19.4°C · Low 11.4°C · 93 mm rain
- Saint John in SeptemberCanada · 466 kmHigh 17.8°C · Low 11.8°C · 108 mm rain
- St. John's in SeptemberCanada · 590 kmHigh 16.3°C · Low 10.7°C · 93 mm rain
- Québec in SeptemberCanada · 847 kmHigh 18.9°C · Low 10.4°C · 109 mm rain
- Montréal in SeptemberCanada · 1040 kmHigh 19.3°C · Low 11.3°C · 99 mm rain
- Ottawa in SeptemberCanada · 1204 kmHigh 20.4°C · Low 12.0°C · 95 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Sydney) is explained once on the Sydney, Canada year overview and on the Sources, method and limits page.