Sussex

What is the climate like in Sussex?

The best time to visit Sussex is typically June – September, with trip comfort peaking in August (6.8/10). Sussex is warmest in July, when daily highs average 82°F (28°C), and coolest in January, when lows fall to about 17°F (-8°C). The wettest month is typically April and the driest is February; the year sees roughly 37 in (929 mm) of precipitation.

• Best time to visitJune – September — comfort peaks in August (6.8/10)
• Warmest monthJuly — average high 82°F (28°C)
• Coolest monthJanuary — average low 17°F (-8°C)
• Wettest monthApril (4.0 in (102 mm))
• Driest monthFebruary (1.7 in (43 mm))
• Annual precipitation37 in (929 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromWaukesha Wwtp, 15 km away (1894-2026)