Shannon

What is the climate like in Shannon?

The best time to visit Shannon is typically May, the year's most comfortable month (5.8/10). Shannon is warmest in July, when daily highs average 66°F (19°C), and coolest in January, when lows fall to about 38°F (3°C). The wettest month is typically October and the driest is April; the year sees roughly 45 in (1147 mm) of precipitation.

• Best time to visitMay — the year's comfort peak (5.8/10)
• Warmest monthJuly — average high 66°F (19°C)
• Coolest monthJanuary — average low 38°F (3°C)
• Wettest monthOctober (4.4 in (112 mm))
• Driest monthApril (2.7 in (69 mm))
• Annual precipitation45 in (1147 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromShannon, 4 km away (1974-2025)