September weather forecast and climate
Pierre, SD

The Capitol Dome building in Pierre, South Dakota, set in a beautiful tree park, reflected in the waterfront
The Capitol Dome building in Pierre, South Dakota, set in a beautiful tree park, reflected in the waterfront

What is the temperature in September in Pierre?

The average high-temperature, in September, is 75.2°F (24°C), while the average low-temperature is 48.2°F (9°C).

How many days does it rain in September in Pierre?

In September, the rain falls for 6 days. Throughout September, 1.3" (32mm) of precipitation is accumulated.
Average temperature in September - Pierre, SD
  • Average high temperature in September: 24°C

The warmest month (with the highest average high temperature) is July (32°C).
The month with the lowest average high temperature is January (-3°C).

  • Average low temperature in September: 9°C

The month with the highest average low temperature is July (17°C).
The coldest month (with the lowest average low temperature) is January (-14°C).

Average rainfall in September - Pierre, SD
  • Average rainfall in September: 32mm

The wettest month (with the highest rainfall) is June (72mm).
The driest month (with the lowest rainfall) is January (6mm).

Average rainfall days in September - Pierre, SD
  • Average rainfall days in September: 6 days

Months with the highest number of rainy days are May and June (10 days).
Months with the lowest number of rainy days are October and November (5 days).

Average daylight in September / Average sunshine in September - Pierre, SD
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.5h).
The month with shortest days is December (Average daylight: 8.9h).

  • Average sunshine in September: 9h

The month with most sunshine is July (Average sunshine: 12h).
Months with least sunshine are November and December (Average sunshine: 5).

Average UV index in September - Pierre, SD
  • Average UV index in September: 6

The month with the highest UV index is July (UV index 9).
Months with the lowest UV index are January and December (UV index 1).

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