Grinnell Weather in July

In Grinnell, July brings high daytime temperatures around 29°C (84°F), with nights cooling to 18°C (64°F). Expect quite a bit of rainfall this month.

Rainfall in Grinnell in July

Records from the past 30 years suggest around 10 days of rain, with 117 mm (4.6 in) average for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Grinnell in July

Daytime highs in Grinnell in July reach 29°C (84°F), with nights around 18°C (64°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights drop to around 18°C (64°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable. This month tends to be the warmest of the year. Light, comfortable clothing will serve you well.

Should you favor a climate that's both dry and comfortably warm, September typically offers the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.