The official National Weather Service forecast for New River — 33.9159°N, 112.136°W, 2.3 miles from I-17. Forecasts here are written by NWS PSR, this county’s forecast office.
| Maricopa County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 66 | 70 | 76 | 84 | 93 | 103 | 105 | 103 | 98 | 87 | 76 | 66 | 86 |
| Avg low °F | 40 | 43 | 48 | 53 | 62 | 71 | 78 | 77 | 71 | 59 | 48 | 40 | 58 |
| Precip in | 0.9 | 1.0 | 0.8 | 0.2 | 0.1 | 0.1 | 1.0 | 1.3 | 0.8 | 0.5 | 0.5 | 0.9 | 8.1 |
1996–2025 normals for Maricopa County — the climate division New River sits in. All-time county record high 118.0°F (2017-06-21); record low 19.5°F (1963-01-13). Source: NOAA / National Weather Service.