The official National Weather Service forecast for Owasso — 36.2695°N, 95.8547°W, 7.7 miles from I-44. Forecasts here are written by NWS TSA, this county’s forecast office.
| Tulsa County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 49 | 53 | 63 | 72 | 79 | 88 | 93 | 92 | 86 | 74 | 62 | 51 | 72 |
| Avg low °F | 26 | 30 | 40 | 48 | 58 | 67 | 71 | 70 | 62 | 50 | 39 | 30 | 49 |
| Precip in | 1.7 | 1.8 | 3.4 | 4.5 | 5.8 | 4.8 | 3.6 | 3.5 | 3.4 | 3.7 | 2.9 | 2.1 | 41.2 |
1996–2025 normals for Tulsa County — the climate division Owasso sits in. All-time county record high 111.7°F (1954-07-14); record low -14.2°F (2021-02-17). Source: NOAA / National Weather Service.