The best times to visit Rapid City for ideal weather are
May 28th to October 7th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Rapid City Travel Guide
Other Rapid City Travel Info
Weather in Rapid City
Average temperatures in Rapid City vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 41st percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Rapid City, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 90.7°F (32.6°C) with temperatures rarely dropping below 62.8°F (17.1°C) at night.
Rapid City Temperatures (Fahrenheit)
Rapid City Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Rapid City Perceived Temperature (F)
Rapid City Perceived Temperature (C)
Average Rapid City Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Rapid City are January, February, and then November. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early January. For example, on the week of January 1st there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late May to early June with an average of 2 days of significant precipitation the week of May 28th.
When can you find snow in Rapid City? Weather stations report large amounts of snow likely to be deepest around April, especially close to early April. The best time to ski (if at all) in Rapid City is often around around November 5th when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in Rapid City.
Snow on the Ground
The graph below shows the average snow on the ground in Rapid City (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Rapid City has some comfortably humid months, with slightly drier months on the other side of the year. The least humid month is September (40.5% relative humidity), and the most humid month is December (58.7%).
Wind in Rapid City is usually moderate. The windiest month is April, followed by May and January. April’s average wind speed of around 10.7 knots (12.3 MPH or 19.8 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late January where average top sustained speeds reach 22.4 knots, which is considered a strong breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Rapid City.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||10.5||Gentle breeze||21.4||Strong breeze|
|Feb||9.8||Gentle breeze||19.8||Strong breeze|
|Mar||9.9||Gentle breeze||20||Strong breeze|
|Apr||10.7||Gentle breeze||20.6||Strong breeze|
|May||10.5||Gentle breeze||20.2||Strong breeze|
|Jun||8.9||Gentle breeze||19.4||Strong breeze|
|Jul||8.1||Gentle breeze||17.8||Strong breeze|
|Aug||8.2||Gentle breeze||17.3||Strong breeze|
|Sep||8.9||Gentle breeze||17.4||Strong breeze|
|Oct||10||Gentle breeze||19.2||Strong breeze|
|Nov||9.2||Gentle breeze||18.4||Strong breeze|
|Dec||8.5||Gentle breeze||17.3||Strong breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Rapid City?
Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 23, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Rapid City, SD, US is August, followed by September and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Rapid City in October. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall Rapid City Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 72.8°F (22.7°C) and 39.1°F (3.9°C) with warmer temperatures in the later months. Rain is somewhat common with 2 to 6 days of significant precipitation per month. Spring is fairly slow for tourism, which makes it a good time for those looking for deals.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see the most precipitation with 4 to 8 days of precipitation per month. June – August is the busiest season for tourism in Rapid City, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 82.5°F (28.1°C) and 43.6°F (6.4°C), which will feel chilly given the humidity and wind. It rains or snows a normal amount: 1 to 3 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (December through February)
Weather is far too cold this time of year in Rapid City to be enjoyable for warm weather travelers. The average high during this season is between 41.7°F (5.4°C) and 32.9°F (0.5°C). On average, it rains or snows a very small amount: 0 to 1 times per month. These times of year are the second busiest with tourists.