The official National Weather Service forecast for Eureka — 37.8239°N, 96.2892°W, 40.9 miles from I-35.
| Greenwood County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 43 | 47 | 58 | 68 | 76 | 85 | 90 | 90 | 82 | 70 | 58 | 46 | 68 |
| Avg low °F | 21 | 25 | 35 | 44 | 54 | 64 | 68 | 67 | 59 | 46 | 35 | 25 | 45 |
| Precip in | 1.0 | 1.5 | 2.6 | 3.5 | 5.7 | 5.3 | 3.9 | 3.8 | 3.8 | 3.5 | 2.0 | 1.4 | 38.0 |
1996–2025 normals for Greenwood County — the climate division Eureka sits in. All-time county record high 113.2°F (1954-07-14); record low -17.4°F (1989-12-22). Source: NOAA / National Weather Service.