Climate averages 1991–2020
St. Catharines weather
in October.
A cool, wet month: the 6th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a cool month in St. Catharines: daytime highs average 14.8°C and nights cool to about 9.4°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 92 mm of rain on roughly 12 days, which makes October a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 04 min on an average October day.
The nearest other city in this atlas is Niagara Falls (16 km away). In October its highs average 14.4°C, about as warm as St. Catharines, with 93 mm of rain.
Among the 86 cities listed in Canada, St. Catharines ranks 2nd of 86 for the warmest October highs and 42nd of 86 for the driest October (rainfall, lowest first). The mean October high of those 86 cities is 12.7°C; St. Catharines is 2.1°C warmer than that mean.
From October to November, average highs fall by 6.6°C to 8.2°C, and monthly rainfall falls from 92 mm to 82 mm.
The annual picture
October 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
St. Catharines climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -0.3°C-6.0°C | -6.0°C | 75 | 11.9 | 9.49 h |
| February | 0.0°C-6.6°C | -6.6°C | 60 | 9.1 | 10.510 h |
| March | 4.2°C-2.8°C | -2.8°C | 73 | 10.4 | 11.912 h |
| April | 10.8°C3.0°C | 3.0°C | 97 | 11.7 | 13.413 h |
| May | 17.4°C9.5°C | 9.5°C | 83 | 11.4 | 14.615 h |
| June | 22.8°C15.9°C | 15.9°C | 91 | 11.1 | 15.315 h |
| July | 25.8°C19.4°C | 19.4°C | 88 | 10.8 | 15.015 h |
| August | 25.1°C19.1°C | 19.1°C | 75 | 9.9 | 14.014 h |
| September | 21.5°C15.5°C | 15.5°C | 85 | 9.7 | 12.513 h |
| October, selected | 14.8°C9.4°C | 9.4°C | 92 | 12.0 | 11.111 h |
| November | 8.2°C3.3°C | 3.3°C | 82 | 10.7 | 9.810 h |
| December | 2.9°C-1.7°C | -1.7°C | 77 | 11.6 | 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
October in nearby cities
- Niagara Falls in OctoberCanada · 16 kmHigh 14.4°C · Low 8.7°C · 93 mm rain
- Amherst in OctoberUnited States · 42 kmHigh 14.7°C · Low 8.2°C · 90 mm rain
- Stoney Creek in OctoberCanada · 43 kmHigh 14.9°C · Low 7.9°C · 85 mm rain
- Buffalo in OctoberUnited States · 43 kmHigh 14.3°C · Low 8.6°C · 93 mm rain
- Oakville in OctoberCanada · 47 kmHigh 14.5°C · Low 8.5°C · 83 mm rain
- Cheektowaga in OctoberUnited States · 50 kmHigh 14.6°C · Low 8.0°C · 90 mm rain
- Hamilton in OctoberCanada · 50 kmHigh 14.6°C · Low 8.9°C · 85 mm rain
- Burlington in OctoberCanada · 54 kmHigh 14.3°C · Low 8.0°C · 83 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 St. Catharines) is explained once on the St. Catharines year overview and on the Sources, method and limits page.