Castleknock

What is the climate like in Castleknock?

The best time to visit Castleknock is typically August, the year's most comfortable month (6.0/10). Castleknock is warmest in July, when daily highs average 65°F (18°C), and coolest in January, when lows fall to about 38°F (3°C). The wettest month is typically September and the driest is May; the year sees roughly 38 in (954 mm) of precipitation.

• Best time to visitAugust — the year's comfort peak (6.0/10)
• Warmest monthJuly — average high 65°F (18°C)
• Coolest monthJanuary — average low 38°F (3°C)
• Wettest monthSeptember (3.8 in (96 mm))
• Driest monthMay (2.6 in (66 mm))
• Annual precipitation38 in (954 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromDublin Phoenix Park, 3 km away (1867-2026)