Weather in September in Watertown, Sd

< September >
	Normal Max/ High Temperature	22°C (72°F)
	Average Temperature	15°C (60°F)
	Min/ Low Temperature	9°C (47°F)
	Normal Precipitation	50mm (2in)
	Average Daylight per day	12h 28'
	Sun altitude at solar noon on the 21st day.	45.5°

• The average temperature in Watertown, Sd in September is very mild at 15.3 °C (59.54 °F).
• Afternoons can be really warm with average high temperatures reaching 22.1 °C (71.8 °F).
• Overnight temperatures are generally a little cool with an average low of 8.6 °C (47.5 °F).
• In September the mean daily temperature range/ variation is 13.5 °C (24.3 °F).
• Precipitation averages for September are moderate with 50mm (2 in) recorded.
• The shortest day is 11h 42' long and the longest day is 13h 15' long with an average length of 12h 28'.

Weather Trend Graph for September in Watertown, Sd, Usa