The official National Weather Service forecast for Parkville — 39.3773°N, 76.5397°W, 6.1 miles from I-83. Forecasts here are written by NWS LWX, this county’s forecast office.
| Baltimore County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 41 | 45 | 54 | 66 | 75 | 83 | 87 | 85 | 79 | 67 | 56 | 46 | 65 |
| Avg low °F | 24 | 26 | 33 | 43 | 52 | 61 | 66 | 65 | 58 | 46 | 36 | 29 | 45 |
| Precip in | 3.3 | 2.9 | 3.7 | 3.8 | 4.4 | 4.5 | 4.7 | 4.3 | 4.8 | 4.1 | 3.2 | 3.8 | 47.5 |
1996–2025 normals for Baltimore County — the climate division Parkville sits in. All-time county record high 102.6°F (2011-07-23); record low -8.7°F (1982-01-17). Source: NOAA / National Weather Service.