Rapid City, SD Weather & Growing Conditions
Tonight
55°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 10pm and 3am, then patchy fog and a chance of showers and thunderstorms. Cloudy. Low around 55, with temperatures rising to around 57 overnight. East wind around 5 mph. Chance of precipitation is 50%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Slight Chance Showers And Thunderstorms | 5 mph E | 51% |
| Saturday | 67°F | Rain Showers Likely | 3 to 9 mph E | 58% |
| Saturday Night | 52°F | Showers And Thunderstorms Likely | 6 to 9 mph E | 74% |
| Sunday | 61°F | Rain Showers | 6 to 10 mph E | 99% |
| Sunday Night | 49°F | Showers And Thunderstorms | 3 to 9 mph E | 93% |
| Monday | 64°F | Chance Rain Showers | 5 to 12 mph E | 34% |
| Monday Night | 48°F | Mostly Cloudy | 8 to 12 mph SE | 13% |
| Tuesday | 74°F | Partly Sunny | 9 to 20 mph S | 5% |
| Tuesday Night | 53°F | Slight Chance Rain Showers then Partly Cloudy | 9 to 15 mph SE | 18% |
| Wednesday | 79°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 9 to 13 mph S | 19% |
| Wednesday Night | 53°F | Partly Cloudy | 5 to 8 mph SW | 14% |
| Thursday | 80°F | Sunny | 3 to 9 mph NE | 6% |
| Thursday Night | 54°F | Partly Cloudy | 5 to 9 mph SE | 6% |
| Friday | 81°F | Mostly Sunny | 5 to 16 mph SE | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rapid City, SD
Last spring frost
May 12
First fall frost
Oct 1
Growing season
139 days
Hardiness zone
5a
Explore more for Rapid City, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Rapid City Rgnl Ap, Sd (2.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.