Rapid City, SD

NWS NDFD forecast low temperature for Rapid City.

Every year's low on each of the next 7 forecast dates at Rapid City — toggle a day below. The forecast line shows where it lands; the ringed bar is the coldest on record.

The hottest and coldest ever recorded at Rapid City in each calendar month, and for the whole 1942–2026 record — with the year each was set.

Records set or tied at Rapid City so far this year — through Aug 30.

Two more daily records, kept separate from the rankings: the warmest a night has ever stayed (record high minimum) and the coldest a day has ever gotten (record low maximum) — the flip side of the usual record high and low.

Normal low & low by month, from Rapid City's own 1991–2020 record. Today's normal low: 53°F · forecast is +2° vs normal.

Rapid City's observed daily low for the last six weeks — a white ring marks any day that broke or tied its daily record for that date.

Every day this year against Rapid City's own record — the record low, the normal, and the full span ever seen. A shareable look at where the year stands.

Each cell is one day's low at Rapid City, coloured by temperature — 85 years of record, so heat waves read as warm streaks and cold snaps as blue.

How many days a year hit a given low at Rapid City — counted through Sep 2 each year, so you can see whether 2026 is running cold. Pick a threshold:

102 days ≤32°F so far in 2026 — tied for the 44th most in 85 years. Normal for this point: 102. Record: 119 in 1950.

A ready-to-share summary of Rapid City's outlook — post it, or link this page.