The official National Weather Service forecast for Britton — 45.7916°N, 97.7509°W, 38 miles from I-29.
| Marshall County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 20 | 24 | 38 | 53 | 66 | 77 | 82 | 79 | 72 | 56 | 40 | 25 | 53 |
| Avg low °F | 3 | 5 | 18 | 31 | 44 | 55 | 60 | 57 | 49 | 36 | 22 | 9 | 32 |
| Precip in | 0.6 | 0.6 | 0.9 | 2.1 | 3.1 | 3.8 | 3.5 | 2.9 | 2.4 | 2.3 | 0.8 | 0.8 | 23.8 |
1996–2025 normals for Marshall County — the climate division Britton sits in. All-time county record high 102.9°F (2006-07-16); record low -38.1°F (1994-02-09). Source: NOAA / National Weather Service.