Cornwall

What is the climate like in Cornwall?

The best time to visit Cornwall is typically September, the year's most comfortable month (6.8/10). Cornwall is warmest in July, when daily highs average 81°F (27°C), and coolest in January, when lows fall to about 14°F (-10°C). The wettest month is typically October and the driest is September; the year sees roughly 48 in (1215 mm) of precipitation.

• Best time to visitSeptember — the year's comfort peak (6.8/10)
• Warmest monthJuly — average high 81°F (27°C)
• Coolest monthJanuary — average low 14°F (-10°C)
• Wettest monthOctober (5.3 in (133 mm))
• Driest monthSeptember (2.8 in (71 mm))
• Annual precipitation48 in (1215 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromCornwall, 2 km away (1950-2024)