Climate averages 1991–2020
Brantford weather
in September.
A mild, moderately wet month: the 4th warmest and the joint 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Brantford: daytime highs average 21.6°C and nights cool to about 13.0°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 77 mm of rain on roughly 10 days, which makes September a moderately wet month (the joint 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 33 min on an average September day.
The nearest other city in this atlas is Cambridge, Canada (25 km away). In September its highs average 21.2°C, about as warm as Brantford, with 77 mm of rain.
Among the 86 cities listed in Canada, Brantford ranks joint 4th of 86 for the warmest September highs and joint 29th of 86 for the driest September (rainfall, lowest first). The mean September high of those 86 cities is 19.8°C; Brantford is 1.8°C warmer than that mean.
From September to October, average highs fall by 7.1°C to 14.4°C, and monthly rainfall stays at 77 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
Brantford climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -1.1°C-8.8°C | -8.8°C | 65 | 10.8 | 9.49 h |
| February | -0.1°C-9.3°C | -9.3°C | 53 | 8.6 | 10.510 h |
| March | 5.2°C-4.5°C | -4.5°C | 64 | 9.8 | 11.912 h |
| April | 12.2°C1.9°C | 1.9°C | 87 | 11.7 | 13.413 h |
| May | 19.1°C8.8°C | 8.8°C | 87 | 11.6 | 14.615 h |
| June | 24.1°C14.5°C | 14.5°C | 94 | 11.5 | 15.315 h |
| July | 26.4°C17.2°C | 17.2°C | 83 | 10.7 | 15.015 h |
| August | 25.3°C16.5°C | 16.5°C | 75 | 9.5 | 13.914 h |
| September, selected | 21.6°C13.0°C | 13.0°C | 77 | 9.5 | 12.513 h |
| October | 14.4°C6.9°C | 6.9°C | 77 | 10.9 | 11.111 h |
| November | 7.5°C0.8°C | 0.8°C | 71 | 10.0 | 9.810 h |
| December | 1.9°C-4.5°C | -4.5°C | 63 | 10.3 | 9.19 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
- Cambridge, Canada in SeptemberCanada · 25 kmHigh 21.2°C · Low 12.3°C · 77 mm rain
- Hamilton in SeptemberCanada · 36 kmHigh 21.6°C · Low 15.1°C · 77 mm rain
- Kitchener in SeptemberCanada · 38 kmHigh 20.7°C · Low 11.6°C · 79 mm rain
- Stoney Creek in SeptemberCanada · 42 kmHigh 22.0°C · Low 14.1°C · 77 mm rain
- Waterloo in SeptemberCanada · 42 kmHigh 20.6°C · Low 11.9°C · 79 mm rain
- Burlington in SeptemberCanada · 45 kmHigh 21.3°C · Low 14.2°C · 75 mm rain
- Guelph in SeptemberCanada · 46 kmHigh 20.6°C · Low 11.8°C · 77 mm rain
- Milton in SeptemberCanada · 53 kmHigh 21.4°C · Low 13.5°C · 73 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 Brantford) is explained once on the Brantford year overview and on the Sources, method and limits page.
Cambridge, Canada lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.