The official National Weather Service forecast for Flandreau — 44.0494°N, 96.5953°W, 13 miles from I-29.
| Moody County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 24 | 29 | 41 | 56 | 68 | 79 | 83 | 80 | 74 | 59 | 43 | 29 | 55 |
| Avg low °F | 6 | 9 | 21 | 33 | 45 | 57 | 61 | 58 | 50 | 37 | 23 | 11 | 34 |
| Precip in | 0.6 | 0.7 | 1.4 | 2.6 | 3.7 | 4.2 | 3.2 | 3.3 | 2.8 | 2.2 | 1.0 | 1.0 | 26.7 |
1996–2025 normals for Moody County — the climate division Flandreau sits in. All-time county record high 104.3°F (1988-06-22); record low -34.2°F (1970-01-19). Source: NOAA / National Weather Service.