| < September >
|Normal Max/ High Temperature
|Min/ Low Temperature
|Number of Wet Days (probability of rain on a day)
|Average Sunlight per day
|Average Daylight per day
|Sunny (Cloudy) Daylight Hours
|Sun altitude at solar noon on the 21st day.
- The average temperature in Rapid City, South Dakota in September is mild at 15 °C (59 °F).
- Afternoons can be really warm with average high temperatures reaching 22.9 °C (73.2 °F).
- Overnight temperatures are generally a little cool with an average low of 7 °C (44.6 °F).
- The variation/ range of diurnal mean temperatures in September is 15.9 °C (28.6 °F).
- The weather in September is dry with periodic rain. A mere 31.2mm (1.2in) of water is unloaded during on average 6 days.
- In September the heavens above Rapid City, South Dakota are quite sunny with on balance a respectable 8:36 of blazing sunlight per day.
- The shortest day is 11:42 long and the longest day is 13:12 long with an average length of 12:27.
- There are approximately 3:40 per day when bright sunshine is absent due to cloud, haze or the sun being too low on the horizon to register.
- It is sunny approximately 70.1% of daylight hours and cloudy 29.9% of daylight hours.
Check the distance to and compare the Rapid City, South Dakota September averages with somewhere beginning with:
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Weather Trend Graph for September in Rapid City, South Dakota, Usa
Navigate to September Weather in Locations Surrounding Rapid City, South Dakota:
- Miles City, Montana, Usa - 333.1 kms (207 miles) NW
- Ekalaka, Mt, Usa - 226.4 kms (140.7 miles) NNW
- Sheridan, Wy, Usa - 306.3 kms (190.3 miles) WNW
- Casper, Wy, Usa - 291.3 kms (181 miles) WSW
- Lusk, Wy, Usa - 176.7 kms (109.8 miles) SW
- Chugwater, Wy, Usa - 272.4 kms (169.2 miles) SSW
- Scottsbluff, Ne, Usa - 248 kms (154.1 miles) S
- Kimball, Ne, Usa - 348.3 kms (216.4 miles) S
- Eureka, Sd, Usa - 331.6 kms (206.1 miles) NE
- Faulkton, Sd, Usa - 342.2 kms (212.7 miles) ENE
- Pierre Faa Ap, Sd, Usa - 231.7 kms (144 miles) E
- Rapid City (Airport), Sd, Usa - 2.9 kms (1.8 miles) ESE
- Hay Springs, Ne, Usa - 121.6 kms (75.6 miles) S
- Hot Springs, Sd, Usa - 121.6 kms (75.6 miles) S
- Valentine, Ne, Usa - 255 kms (158.4 miles) ESE
- Alliance, Ne, Usa - 228.5 kms (142 miles) S
- Lodgepole, Ne, Usa - 343.1 kms (213.2 miles) S