Dayton Seasonal temperature break down - The average median temperature March through May is approximately 64°F with highs averaging at 78°F and lows averaging at 53°F. June through August has an approximate average median temperature of 79°F with highs averaging at 92°F, lows typically average at 69°F. Average median temperatures September through November average out at 66°F, high temperatures average out at 80°F and lows average at 55°F.
The average median temperature December through February is approximately 52°F with highs averaging at 64°F, lows average out at 44°F.
The average Dayton annual median temperature averages out at approximately 66°F. The coldest month in Dayton is January with a median temperature of 46°F, the average high for the month of January is 58°F with an average low of 38°F. The hottest month in Dayton is August with an approximate median temperature of 80°F, the average high for the month of August is 94°F with an average low of 70°F.