Climate almanac
Poolesville
Maryland, United States · 39.15°, -77.42°
What is the climate like in Poolesville?
The best time to visit Poolesville is typically October, the year's most comfortable month (6.7/10). Poolesville is warmest in July, when daily highs average 89°F (32°C), and coolest in January, when lows fall to about 29°F (-2°C). The wettest month is typically July and the driest is October; the year sees roughly 45 in (1142 mm) of precipitation.
- Best time to visitOctober — the year's comfort peak (6.7/10)
- Warmest monthJuly — average high 89°F (32°C)
- Coolest monthJanuary — average low 29°F (-2°C)
- Wettest monthJuly (5.0 in (127 mm))
- Driest monthOctober (2.9 in (73 mm))
- Annual precipitation45 in (1142 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromPurcellville, 25 km away (1900-2026)