The month of October in Dallas experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 27% to 32%. The lowest chance of overcast or mostly cloudy conditions is 26% on October 5. The clearest day of the month is October 5, with clear, mostly clear, or partly cloudy conditions 74% of the time.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Dallas, the chance of a wet day over the course of October is essentially constant, remaining around 25% throughout. For reference, the year's highest daily chance of a wet day is 37% on May 15, and its lowest chance is 16% on January 1.
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day. The average sliding 31-day rainfall during October in Dallas is increasing, starting the month at 3.0 inches, when it rarely exceeds 6.1 inches or falls below 0.7 inches, and ending the month at 3.5 inches, when it rarely exceeds 7.5 inches or falls below 0.9 inches.
Over the course of October in Dallas, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 57 minutes, implying an average daily decrease of 1 minute, 55 seconds, and weekly decrease of 13 minutes, 24 seconds.
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night
The average hourly wind speed in Dallas is increasing during October, increasing from 9.0 miles per hour to 10.1 miles per hour over the course of the month. For reference, on April 2, the windiest day of the year, the daily average wind speed is 11.8 miles per hour, while on August 23, the calmest day of the year, the daily average wind speed is 8.0 miles per hour.
The growing season in Dallas typically lasts for 9.2 months (278 days), from around February 26 to around December 1, rarely starting before January 21 or after March 21, and rarely ending before November 4 or after December 23.