NWS, American, European side by side around Rapid City and nearby towns.Live rain radar →
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Next 14 hours
consensus of the three models
7-day forecast
where the models agree, and where they split
Rapid City, SD is at its warmest in Jul (average highs near 85°F) and coldest in Jan (lows around 18°F), with roughly 18 in of precipitation across the year. Below, compare what NWS, American, European forecast for Rapid City right now, and see exactly where they disagree.
Rapid City climate by month
average daytime high and overnight low across a typical year
Jan
35°
18°
Feb
43°
21°
Mar
43°
22°
Apr
55°
33°
May
69°
47°
Jun
77°
56°
Jul
85°
61°
Aug
84°
62°
Sep
79°
56°
Oct
62°
41°
Nov
48°
29°
Dec
43°
25°
Common questions
What's the weather in Rapid City today?
On this page we show what NWS, American, European each forecast for Rapid City today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Rapid City today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Rapid City and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Rapid City?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the Rapid City forecast is reliable, and when they split you should expect surprises. See our tested US accuracy scoreboard for how the models compare.
What is the warmest month in Rapid City?
Jul is typically the warmest month in Rapid City, with average highs around 85°F.
How cold does Rapid City get?
The coldest month in Rapid City is Jan, when overnight lows average about 18°F.
How much rain does Rapid City get?
Rapid City sees roughly 18 in of precipitation a year, with Jun usually the wettest month.
The forecasts Americans check
The two biggest apps keep their model a secret, so we can't show their numbers, only link you to them. The National Weather Service is public, so its data sits right in the comparison above.