The month of October in Toronto experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 39% to 49%. The clearest day of the month is October 1, with clear, mostly clear, or partly cloudy conditions 61% of the time.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Toronto, the chance of a wet day over the course of October is gradually decreasing, starting the month at 29% and ending it at 26%. For reference, the year's highest daily chance of a wet day is 31% on June 14, and its lowest chance is 14% on January 31.
The average sliding 31-day rainfall during October in Toronto is gradually decreasing, starting the month at 2.1 inches, when it rarely exceeds 3.3 inches or falls below 1.1 inches, and ending the month at 1.7 inches, when it rarely exceeds 3.0 inches or falls below 0.8 inches.
Over the course of October in Toronto, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 26 minutes, implying an average daily decrease of 2 minutes, 52 seconds, and weekly decrease of 20 minutes, 3 seconds.
The chance that a given day will be muggy in Toronto is essentially constant during October, remaining within 1% of 1% throughout. For reference, on August 1, the muggiest day of the year, there are muggy conditions 26% of the time, while on October 25, the least muggy day of the year, there are muggy conditions 0% of the time.
The average hourly wind speed in Toronto is increasing during October, increasing from 10.5 miles per hour to 11.8 miles per hour over the course of the month. For reference, on January 12, the windiest day of the year, the daily average wind speed is 14.4 miles per hour, while on August 4, the calmest day of the year, the daily average wind speed is 8.4 miles per hour.