Mason City

What is the climate like in Mason City?

The best time to visit Mason City is typically September, the year's most comfortable month (6.8/10). Mason City is warmest in July, when daily highs average 82°F (28°C), and coolest in January, when lows fall to about 13°F (-11°C). The wettest month is typically June and the driest is January; the year sees roughly 39 in (992 mm) of precipitation.

• Best time to visitSeptember — the year's comfort peak (6.8/10)
• Warmest monthJuly — average high 82°F (28°C)
• Coolest monthJanuary — average low 13°F (-11°C)
• Wettest monthJune (5.2 in (133 mm))
• Driest monthJanuary (1.5 in (37 mm))
• Annual precipitation39 in (992 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromMason City, 1 km away (1893-2026)