Hermiston Weather in December

Hermiston in December sees low temperatures, with highs around 5°C (41°F) and overnight lows of -3°C (27°F). Rainfall is at its peak this month, around 35 mm (1.4 in) on average, so waterproofs are essential.

Rainfall in Hermiston in December

As the month with the most rain, you'll want to have an umbrella with you to manage the frequent showers. On average, there are about 14 days with snow/rain during this month, averaging 35 mm (1.4 in). The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Hermiston in December

Daytime temperatures in Hermiston reach 5°C (41°F) in December, dropping to -3°C (27°F) at night. December is in the winter season. Cold conditions tend to persist from morning through evening, so be prepared for winter weather. At -3°C (27°F) overnight, frost and ice are likely outside. Indoors, consider packing an extra blanket if you're unsure about the heating. On average, it is the coldest month of the year. So be prepared and make sure to pack winter clothes.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. April, May, June, September and October typically offer the best weather for Hermiston.