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Guide to Dallas weather in March. The average maximum daytime temperature in Dallas in March is a comfortable 20Â°C (68Â°F). The average night-time temperature is usually a cool 8Â°C (46Â°F). There are usually 7 hours of bright sunshine each day, which represents 60% of the 12 hours of daylight.
The numbers here tell you how hot and cold the weather usually is in Dallas, Texas during each month of the year. The average high and low temperatures are listed below by month and annually for Dallas, in both degrees Fahrenheit and Celsius.Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.ow Often Dallas Has Cold Temperatures. Freezing temperatures overnight can happen in Dallas anytime from November to March, normally totalling 23 days a year. For three nights a winter, the lows drop down to 20 degrees Fahrenheit. Most frosty nights in Dallas are followed by daytime thaws.