Rapid City, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rapid City, a city in Pennington County, South Dakota.
This Afternoon
76°F
Mostly Sunny
Mostly sunny. High near 76, with temperatures falling to around 73 in the afternoon. Northeast wind around 7 mph, with gusts as high as 16 mph.
7-day forecast for Rapid City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Mostly Sunny | 7 mph NE | 8% |
| Tonight | 57°F | Slight Chance Showers And Thunderstorms | 1 to 6 mph SE | 58% |
| Saturday | 67°F | Patchy Fog | 2 to 7 mph E | 62% |
| Saturday Night | 54°F | Showers And Thunderstorms Likely | 7 mph E | 74% |
| Sunday | 60°F | Rain Showers | 5 to 8 mph E | 99% |
| Sunday Night | 51°F | Showers And Thunderstorms | 3 to 8 mph E | 94% |
| Monday | 64°F | Chance Rain Showers | 3 to 10 mph E | 42% |
| Monday Night | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph SE | 18% |
| Tuesday | 74°F | Mostly Sunny | 9 to 18 mph SE | 6% |
| Tuesday Night | 55°F | Slight Chance Rain Showers then Partly Cloudy | 6 to 14 mph S | 17% |
| Wednesday | 79°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 | 80°F | Sunny | 3 to 9 mph NE | 7% |
| Thursday Night | 56°F | Partly Cloudy | 7 mph S | 5% |
Forecast source: National Weather Service (api.weather.gov) for Rapid City (44.071, -103.218). Updated through the day.
Growing snapshot for Rapid City
Last spring frost
May 3
First fall frost
Oct 8
Growing season
157 days
Hardiness zone
5b
More local growing data for Rapid City: nearby ZIP 57701 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Caputa
Colonial Pine Hills
Cottonwood
Green Valley
Hill City
Johnson Siding
Keystone
New Underwood
Quinn
Wall
Climate data from the nearest NOAA station, Rapid City Wfo, Sd (3.4 mi from Rapid City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.