Weather in September in Casper, Wy

< September >
	Normal Max/ High Temperature	23°C (74°F)
	Average Temperature	14°C (58°F)
	Min/ Low Temperature	5°C (42°F)
	Normal Precipitation	24mm (0.9in)
	Average Daylight per day	12h 26'
	Sun altitude at solar noon on the 21st day.	47.6°

• The average temperature in Casper, Wy in September is mild at 14.3 °C (57.74 °F).
• Afternoons can be fairly hot with average high temperatures reaching 23.2 °C (73.8 °F).
• Overnight temperatures are generally cool with an average low of 5.3 °C (41.5 °F).
• In September the mean daily temperature range/ variation is 17.9 °C (32.2 °F).
• Precipitation averages for September are low with 23.9mm (0.9 in) recorded.
• The shortest day is 11h 43' long and the longest day is 13h 09' long with an average length of 12h 26'.

Weather Trend Graph for September in Casper, Wy, Usa