Climate averages 1991–2020
Kelowna weather
in September.
A warm, moderately wet month: the 4th warmest and the joint 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Kelowna: daytime highs average 22.2°C and nights cool to about 12.7°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 43 mm of rain on roughly 8 days, which makes September a moderately wet month (the joint 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 40 min on an average September day.
The nearest other city in this atlas is Kamloops (105 km away). In September its highs average 21.4°C, 0.8°C cooler than Kelowna, with 35 mm of rain.
Among the 86 cities listed in Canada, Kelowna ranks 1st of 86 for the warmest September highs and 10th of 86 for the driest September (rainfall, lowest first). The mean September high of those 86 cities is 19.8°C; Kelowna is 2.4°C warmer than that mean.
From September to October, average highs fall by 8.7°C to 13.4°C, and monthly rainfall rises from 43 mm to 69 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
Kelowna climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.2°C-4.1°C | -4.1°C | 59 | 13.5 | 8.69 h |
| February | 3.9°C-3.3°C | -3.3°C | 42 | 10.1 | 10.110 h |
| March | 8.0°C0.0°C | 0.0°C | 55 | 11.5 | 11.812 h |
| April | 13.2°C3.9°C | 3.9°C | 43 | 9.7 | 13.714 h |
| May | 19.9°C8.5°C | 8.5°C | 51 | 9.9 | 15.415 h |
| June | 23.1°C11.7°C | 11.7°C | 51 | 9.2 | 16.316 h |
| July | 27.9°C15.6°C | 15.6°C | 30 | 5.3 | 15.916 h |
| August | 27.8°C16.5°C | 16.5°C | 25 | 5.2 | 14.514 h |
| September, selected | 22.2°C12.7°C | 12.7°C | 43 | 7.7 | 12.713 h |
| October | 13.4°C6.3°C | 6.3°C | 69 | 12.1 | 10.811 h |
| November | 5.7°C0.6°C | 0.6°C | 87 | 15.5 | 9.19 h |
| December | 1.3°C-3.1°C | -3.1°C | 66 | 13.5 | 8.28 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
- Kamloops in SeptemberCanada · 105 kmHigh 21.4°C · Low 10.7°C · 35 mm rain
- Chilliwack in SeptemberCanada · 195 kmHigh 20.5°C · Low 11.4°C · 124 mm rain
- Abbotsford in SeptemberCanada · 220 kmHigh 19.5°C · Low 9.8°C · 102 mm rain
- Maple Ridge in SeptemberCanada · 237 kmHigh 20.0°C · Low 10.9°C · 173 mm rain
- Langley in SeptemberCanada · 245 kmHigh 20.1°C · Low 10.9°C · 86 mm rain
- Coquitlam in SeptemberCanada · 247 kmHigh 20.0°C · Low 11.7°C · 142 mm rain
- Bellingham in SeptemberUnited States · 251 kmHigh 19.0°C · Low 11.8°C · 81 mm rain
- Surrey in SeptemberCanada · 256 kmHigh 19.6°C · Low 10.7°C · 86 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 Kelowna) is explained once on the Kelowna year overview and on the Sources, method and limits page.