Every number on this page describes South Dakota — the 1996–2025 normals, how 2026 is running against them, and the all-time extremes across all 66 counties. Temperatures are °F, precipitation is inches, and degree days use the standard 65 °F base.
Each stripe is one year's statewide average temperature, colored against the period mean — cool years blue, warm years red. This is the Ed Hawkins “warming stripes” encoding: no axis, just the sequence.
The gray band is the normal range from average low to average high in each month. The blue line is what actually happened in the last 12 months, plotted on the month it fell in.
Monthly normal against the last 12 months observed, in inches.
How many days 2026 has delivered so far at each threshold, against the average full year since 1951. A year still in progress will sit below its annual normal.
Annual average temperature and its departure from normal, heating and cooling degree days so far this year, and the highest and lowest temperature ever recorded in each county. Click a column to sort.
| County▲ | Avg temp▲ | vs normal▲ | HDD▲ | CDD▲ | Record high▲ | Record low▲ |
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Normals and observed monthly values are NOAA nClimGrid, aggregated to counties and to the state over the 1996–2025 period, served through weather.city. Threshold-day counts run from 1951. All-time records are the NOAA county record archive, current through —. Degree days use a 65 °F base. Imagery and mapping come from squall.cloud.