Grinnell Weather in December

December in Grinnell typically sees daytime highs of 1°C (34°F) and nighttime lows of -8°C (18°F). Rainfall is also possible this month, so it's worth packing an umbrella. It falls within the winter season.

Rainfall in Grinnell in December

Snow/rain is expected on roughly 10 days, totalling around 63 mm (2.5 in) for the month. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.

Temperature in Grinnell in December

December in Grinnell sees highs of 1°C (34°F) and lows of -8°C (18°F) overnight. The winter season takes place during December. Cold conditions tend to persist from morning through evening, so be prepared for winter weather. At -8°C (18°F) overnight, frost and ice are likely outside. Indoors, consider packing an extra blanket if you're unsure about the heating. It's a notably cold month; make sure to wear layers to stay warm. It's wiser to gear up in advance than to be caught off-guard, trembling in the cold.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Grinnell. Our weather planner can help you explore destinations with more pleasant weather conditions.