Rapid City, SD Weather & Growing Conditions
Tonight
57°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 2am, then patchy fog and a slight chance of showers and thunderstorms between 2am and 3am, then patchy fog and showers and thunderstorms likely. Cloudy. Low around 57, with temperatures rising to around 59 overnight. Southeast wind around 3 mph. Chance of precipitation is 60%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Slight Chance Showers And Thunderstorms | 3 mph SE | 55% |
| Saturday | 66°F | Rain Showers Likely | 2 to 8 mph E | 63% |
| Saturday Night | 54°F | Showers And Thunderstorms Likely | 8 mph E | 74% |
| Sunday | 59°F | Rain Showers | 6 to 9 mph E | 99% |
| Sunday Night | 51°F | Showers And Thunderstorms | 3 to 9 mph E | 93% |
| Monday | 63°F | Chance Rain Showers | 5 to 12 mph E | 41% |
| Monday Night | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 12 mph SE | 16% |
| Tuesday | 73°F | Mostly Sunny | 12 to 21 mph SE | 6% |
| Tuesday Night | 55°F | Partly Cloudy | 8 to 16 mph S | 14% |
| Wednesday | 78°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 to 10 mph S | 21% |
| Wednesday Night | 55°F | Mostly Clear | 6 mph SW | 14% |
| Thursday | 79°F | Sunny | 3 to 9 mph NE | 7% |
| Thursday Night | 56°F | Partly Cloudy | 8 mph S | 5% |
| Friday | 80°F | Mostly Sunny | 6 to 17 mph S | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rapid City, SD
Last spring frost
May 3
First fall frost
Oct 8
Growing season
157 days
Hardiness zone
5b
Explore more for Rapid City, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Rapid City Wfo, Sd (3.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.