Welwyn Garden City

What is the climate like in Welwyn Garden City?

The best time to visit Welwyn Garden City is typically June – September, with trip comfort peaking in July (7.1/10). Welwyn Garden City is warmest in July, when daily highs average 72°F (22°C), and coolest in January, when lows fall to about 36°F (2°C). The wettest month is typically October and the driest is April; the year sees roughly 29 in (732 mm) of precipitation.

• Best time to visitJune – September — comfort peaks in July (7.1/10)
• Warmest monthJuly — average high 72°F (22°C)
• Coolest monthJanuary — average low 36°F (2°C)
• Wettest monthOctober (3.0 in (76 mm))
• Driest monthApril (1.7 in (44 mm))
• Annual precipitation29 in (732 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromRothamsted, 39 km away (1916-2026)