Dry-winter hot continental climate
Climate Fort Thompson - South Dakota
Annual high59ºF
Annual low35ºF
Precipitation19.87 inch
| Month | HighºF | LowºF | Precipinch |
|---|---|---|---|
| Jan | 30 | 8 | 0.47 |
| Feb | 35 | 12 | 0.40 |
| Mar | 46 | 22 | 1.20 |
| Apr | 60 | 34 | 1.74 |
| May | 71 | 46 | 2.92 |
| Jun | 80 | 56 | 3.74 |
| Jul | 87 | 62 | 2.65 |
| Aug | 86 | 60 | 2.26 |
| Sep | 77 | 50 | 2.25 |
| Oct | 62 | 36 | 1.41 |
| Nov | 46 | 23 | 0.57 |
| Dec | 33 | 12 | 0.26 |
- JanHigh 30ºFLow 8ºFPrecip 0.47 inch
- FebHigh 35ºFLow 12ºFPrecip 0.40 inch
- MarHigh 46ºFLow 22ºFPrecip 1.20 inch
- AprHigh 60ºFLow 34ºFPrecip 1.74 inch
- MayHigh 71ºFLow 46ºFPrecip 2.92 inch
- JunHigh 80ºFLow 56ºFPrecip 3.74 inch
- JulHigh 87ºFLow 62ºFPrecip 2.65 inch
- AugHigh 86ºFLow 60ºFPrecip 2.26 inch
- SepHigh 77ºFLow 50ºFPrecip 2.25 inch
- OctHigh 62ºFLow 36ºFPrecip 1.41 inch
- NovHigh 46ºFLow 23ºFPrecip 0.57 inch
- DecHigh 33ºFLow 12ºFPrecip 0.26 inch
Climate summary
What is the average weather in Fort Thompson, South Dakota?
Fort Thompson experiences a humid continental climate, marked by very large seasonal temperature contrasts. Summers are warm, while winters are cold. The area is dry overall, with a strong seasonal pattern where summers are wetter and winters are the driest period.
Fort Thompson weather averages
Annual high59ºF
Annual low35ºF
Precipitation19.87 inch
Daily normals Fort Thompson - South Dakota - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 29.4 | 7.3 | 0.01 | 0.01 | 0.10 | 0.10 |
| Jan 2 | 29.2 | 7.2 | 0.03 | 0.03 | 0.10 | 0.10 |
| Jan 3 | 29.1 | 7.1 | 0.04 | 0.04 | 0.20 | 0.20 |
| Jan 4 | 29.0 | 7.1 | 0.06 | 0.06 | 0.30 | 0.30 |
| Jan 5 | 29.0 | 7.0 | 0.07 | 0.07 | 0.40 | 0.40 |
| Jan 6 | 28.9 | 7.0 | 0.09 | 0.09 | 0.50 | 0.50 |
| Jan 7 | 28.9 | 6.9 | 0.10 | 0.10 | 0.60 | 0.60 |
| Jan 8 | 28.8 | 6.9 | 0.12 | 0.12 | 0.70 | 0.70 |
| Jan 9 | 28.8 | 6.9 | 0.14 | 0.14 | 0.80 | 0.80 |
| Jan 10 | 28.8 | 6.9 | 0.15 | 0.15 | 0.80 | 0.80 |
| Jan 11 | 28.8 | 6.8 | 0.17 | 0.17 | 0.90 | 0.90 |
| Jan 12 | 28.8 | 6.8 | 0.18 | 0.18 | 1.00 | 1.00 |
| Jan 13 | 28.8 | 6.8 | 0.20 | 0.20 | 1.10 | 1.10 |
| Jan 14 | 28.9 | 6.8 | 0.22 | 0.22 | 1.10 | 1.10 |
| Jan 15 | 28.9 | 6.8 | 0.23 | 0.23 | 1.20 | 1.20 |
| Jan 16 | 29.0 | 6.8 | 0.25 | 0.25 | 1.30 | 1.30 |
| Jan 17 | 29.1 | 6.8 | 0.27 | 0.27 | 1.30 | 1.30 |
| Jan 18 | 29.1 | 6.8 | 0.28 | 0.28 | 1.40 | 1.40 |
| Jan 19 | 29.2 | 6.8 | 0.30 | 0.30 | 1.50 | 1.50 |
| Jan 20 | 29.3 | 6.8 | 0.32 | 0.32 | 1.60 | 1.60 |
| Jan 21 | 29.4 | 6.8 | 0.33 | 0.33 | 1.70 | 1.70 |
| Jan 22 | 29.6 | 6.8 | 0.35 | 0.35 | 1.80 | 1.80 |
| Jan 23 | 29.7 | 6.8 | 0.36 | 0.36 | 1.90 | 1.90 |
| Jan 24 | 29.8 | 6.8 | 0.38 | 0.38 | 2.00 | 2.00 |
| Jan 25 | 29.9 | 6.8 | 0.39 | 0.39 | 2.00 | 2.00 |
| Jan 26 | 30.1 | 6.9 | 0.40 | 0.40 | 2.20 | 2.20 |
| Jan 27 | 30.3 | 6.9 | 0.42 | 0.42 | 2.30 | 2.30 |
| Jan 28 | 30.4 | 6.9 | 0.43 | 0.43 | 2.40 | 2.40 |
| Jan 29 | 30.6 | 7.0 | 0.45 | 0.45 | 2.50 | 2.50 |
| Jan 30 | 30.8 | 7.0 | 0.46 | 0.46 | 2.60 | 2.60 |
| Jan 31 | 31.0 | 7.1 | 0.48 | 0.48 | 2.70 | 2.70 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Fort Thompson - October 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Oct 1 | 81.0 | 52.0 | 0.00 |
| Oct 2 | 66.9 | 50.0 | 0.00 |
| Oct 3 | – | – | – |
| Oct 4 | 78.1 | 42.1 | 0.02 |
| Oct 5 | – | – | – |
| Oct 6 | – | – | – |
| Oct 7 | – | – | – |
| Oct 8 | 80.1 | 46.9 | 0.00 |
| Oct 9 | 75.0 | 46.9 | 2.48 |
| Oct 10 | 82.0 | 46.0 | 0.00 |
| Oct 11 | 90.0 | 52.0 | 0.01 |
| Oct 12 | 61.0 | 46.9 | 0.00 |
| Oct 13 | 55.9 | 42.1 | 0.00 |
| Oct 14 | 61.0 | 35.1 | 0.00 |
| Oct 15 | 59.0 | 32.0 | 0.11 |
| Oct 16 | 57.9 | 39.9 | 0.17 |
| Oct 17 | 55.9 | 37.9 | 0.00 |
| Oct 18 | 73.9 | 39.9 | 0.01 |
| Oct 19 | 71.1 | 41.0 | 0.00 |
| Oct 20 | 68.0 | 41.0 | 0.01 |
| Oct 21 | 73.0 | 42.1 | 0.00 |
| Oct 22 | 75.0 | 43.0 | 0.00 |
| Oct 23 | 79.0 | 44.1 | 0.00 |
| Oct 24 | 81.0 | 50.0 | 0.00 |
| Oct 25 | 54.0 | 36.0 | 0.01 |
| Oct 26 | 46.0 | 39.0 | 0.35 |
| Oct 27 | 39.9 | 37.9 | 0.67 |
| Oct 28 | 57.9 | 37.9 | 0.00 |
| Oct 29 | 64.0 | 34.0 | 0.00 |
| Oct 30 | – | – | – |
| Oct 31 | – | – | – |
The data for October 2026 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature90.0ºF · Oct 11
- Lowest max temperature39.9ºF · Oct 27
- Highest min temperature52.0ºF · Oct 1
- Lowest min temperature32.0ºF · Oct 15
Geo Fort Thompson - South Dakota
Location
- Country
- United States
- State
- South Dakota
- County
- –
- City
- Fort Thompson
- Zip Code
- 57339
- Elevation
- 1440 ft
- Longitude
- -99.44
- Latitude
- 44.07
- ICAO
- –
- IATA
- –