October weather forecast
Rapid City, SD

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A scenic panorama of the Rapid City in South Dakota
A scenic panorama of the Rapid City in South Dakota

Weather in October

October further amplifies the autumn vibe in Rapid City, carrying in a cooler scent of the air. Dipping temperatures give rise to warm-layer dressing, and the first signs of snow appear, hinting at winter's proximity. A slight increase in rainfall accompanies the weather shift. With the wind picking up pace, residents begin to hunker down for the impending seasonal transition. The reduction in sunshine hours serves as another reminder of the inevitable winter.

Temperature

October's arrival signals a distinct temperature shift, dropping from a moderately hot 73.9°F (23.3°C) in September to a refreshing 56.5°F (13.6°C). In the month of October, Rapid City experiences an average low-temperature of 39.9°F (4.4°C).

Humidity

In October, the average relative humidity in Rapid City is 58%.

Rainfall

In Rapid City, in October, it is raining for 8.6 days, with typically 1.14" (29mm) of accumulated precipitation. In Rapid City, during the entire year, the rain falls for 118.8 days and collects up to 15.39" (391mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in Rapid City. In Rapid City, in October, snow falls for 2.6 days, with typically accumulated 1.5" (38mm) of snow. In Rapid City, during the entire year, snow falls for 50.4 days and aggregates up to 24.41" (620mm) of snow.

Daylight

In Rapid City, South Dakota, the average length of the day in October is 10h and 59min.
On the first day of the month, sunrise is at 6:51 am and sunset at 6:33 pm. On the last day of October, sunrise is at 7:29 am and sunset at 5:43 pm MDT.

Sunshine

In October, the average sunshine is 7.3h.

UV index

The average daily maximum UV index in October is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.
Note: The maximum UV index of 3 during October leads to these instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. When the Sun is at its strongest around midday, find shade and limit exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average October temperature in Rapid City?

An average high-temperature, in October, in Rapid City, is 56.5°F (13.6°C) and the average low-temperature is 39.9°F (4.4°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in August is appraised at 84.2°F (29°C).

What is the average humidity in October in Rapid City?

The average relative humidity in October in Rapid City is 58%.

How much does it rain in Rapid City in October?

In October, in Rapid City, South Dakota, the rain falls for 8.6 days. Throughout October, 1.14" (29mm) of precipitation is accumulated.

How many days does it snow in October in Rapid City?

In Rapid City, South Dakota, during October, snow falls for 2.6 days and regularly aggregates up to 1.5" (38mm) of snow.

What is the average length of the day in October in Rapid City?

In October, the average day length in Rapid City is 10h and 59min.

What time are sunrise and sunset in October in Rapid City?

On the first day of October in Rapid City, South Dakota, sunrise is at 6:51 am and sunset at 6:33 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:43 pm MDT.

How long on average sun shines in October in Rapid City?

In October, the average sunshine duration is 7.3h.

What is the UV index reading in October in Rapid City?

The average daily maximum UV index in October in Rapid City is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Rapid City, SD

Average temperature in October - Rapid City, SD
  • Average high temperature in October: 56.5°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (32.5°F).

  • Average low temperature in October: 39.9°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is February (17.8°F).

Average pressure in October
Rapid City, SD

Average pressure in October - Rapid City, SD
  • Average pressure in October: 29.98"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in October
Rapid City, SD

Average wind speed in October - Rapid City, SD
  • Average wind speed in October: 10.1mph

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).

Average humidity in October
Rapid City, SD

Average humidity in October - Rapid City, SD
  • Average humidity in October: 58%

The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are August and September (50%).

Average rainfall in October
Rapid City, SD

Average rainfall in October - Rapid City, SD
  • Average rainfall in October: 1.14"

The wettest month (with the highest rainfall) is May (2.28").
The driest month (with the least rainfall) is January (0.43").

Average rainfall days in October
Rapid City, SD

Average rainfall days in October - Rapid City, SD
  • Average rainfall days in October: 8.6 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is December (4.8 days).

Average snowfall in October
Rapid City, SD

Average snowfall in October - Rapid City, SD
  • Average snowfall in October: 1.5"

The month with the highest snowfall is April (5.43").
The months with the least snowfall are June, July and August (0").

Average snowfall days in October
Rapid City, SD

Average snowfall days in October - Rapid City, SD
  • Average snowfall days in October: 2.6 days

The month with the highest number of snowfall days is February (10.5 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in October /
Average sunshine in October
Rapid City, SD

Average daylight in October / Average sunshine in October - Rapid City, SD
  • Average daylight in October: 11h and 0min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in October: 7h and 2min

The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).

Average sunshine days in October
Rapid City, SD

Average sunshine days in October - Rapid City, SD
  • Average sunshine days in October: 17.7 days

The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (11 days).

Average UV index in October
Rapid City, SD

Average UV index in October - Rapid City, SD
  • Average UV index in October: 3

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in October
Rapid City, SD

Average cloud cover in October - Rapid City, SD
  • Average cloud cover in October: 26

The months with the most cloud cover are February and April (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 16).

Average visibility in October
Rapid City, SD

Average visibility in October - Rapid City, SD
  • Average visibility in October: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Rapid City, South Dakota, USA

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