Oswego

What is the climate like in Oswego?

The best time to visit Oswego is typically September, the year's most comfortable month (6.5/10). Oswego is warmest in July, when daily highs average 77°F (25°C), and coolest in February, when lows fall to about 25°F (-4°C). The wettest month is typically October and the driest is September; the year sees roughly 56 in (1433 mm) of precipitation.

• Best time to visitSeptember — the year's comfort peak (6.5/10)
• Warmest monthJuly — average high 77°F (25°C)
• Coolest monthFebruary — average low 25°F (-4°C)
• Wettest monthOctober (6.2 in (157 mm))
• Driest monthSeptember (3.7 in (94 mm))
• Annual precipitation56 in (1433 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromOswego, 2 km away (1926-2026)