Ottawa’s September Weather Pattern: From Late Summer Warmth to Early Fall Transitions

Current Weather Conditions in Ottawa

Ottawa is currently experiencing light rain conditions with a temperature of 15.4°C. The humidity level is at 94%, with west-northwest winds at 9 km/h and visibility at 5 kilometers.

September Temperature Patterns

Early September begins with peak temperatures reaching 23.5°C, while the daily highs average around 22.5°C with lows near 14.1°C. As the month progresses, temperatures gradually decline, with mid-month highs around 20.9°C, and by month’s end, daytime temperatures settle near 19°C with overnight lows dropping to 11°C.

Precipitation and Sunshine Outlook

Residents can expect varying sunshine levels throughout September, ranging from 5 to 8 hours daily, with the most sunlight typically occurring around September 6th. Regarding rainfall, the month is characterized by increasing precipitation patterns, with 5 rainy days in the first ten days, increasing to 7 days in mid-month, and 8 wet days in the final third of September.

Humidity and Environmental Conditions

Humidity levels in Ottawa during September typically fluctuate between 70% and 80%. The month begins with an average humidity of 73%, gradually increasing to 75% mid-month, and reaching 76% by the end of September.

Impact on Daily Activities

These weather conditions signal Ottawa’s transition from late summer to early autumn, affecting everything from outdoor activities to energy consumption. Residents should prepare for increasingly variable conditions as the season changes, with appropriate clothing and rain gear becoming more necessary as the month progresses.