Spearfish Weather in May

May in Spearfish typically sees daytime highs of 18°C (64°F) and nighttime lows of 5°C (41°F). As the wettest month of the year, expect more rainfall than other months.

Rainfall in Spearfish in May

With this being the wettest month, keeping an umbrella on hand might save you from getting wet from a sudden shower. Historically, May sees about 16 days of rain, with a monthly average of 120 mm (4.7 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in Spearfish in May

In May, Spearfish gets pleasant temperatures, with highs of 18°C (64°F). Nights cool to around 5°C (41°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 5°C (41°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Should you favor a climate that's both dry and comfortably warm, August and September typically offer 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.