Castle Shannon

What is the climate like in Castle Shannon?

The best time to visit Castle Shannon is typically September, the year's most comfortable month (6.5/10). Castle Shannon is warmest in July, when daily highs average 84°F (29°C), and coolest in January, when lows fall to about 25°F (-4°C). The wettest month is typically May and the driest is November; the year sees roughly 54 in (1378 mm) of precipitation.

• Best time to visitSeptember — the year's comfort peak (6.5/10)
• Warmest monthJuly — average high 84°F (29°C)
• Coolest monthJanuary — average low 25°F (-4°C)
• Wettest monthMay (6.1 in (155 mm))
• Driest monthNovember (3.1 in (78 mm))
• Annual precipitation54 in (1378 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromPittsburgh Allegheny Co AP, 9 km away (1935-2026)