Big Sky Weather in May

Big Sky in May sees moderate daytime temperatures of 13°C (55°F) and nighttime lows of -1°C (30°F). With the highest rainfall of the year it is wise to pack an umbrella and expect frequent showers.

Rainfall in Big Sky in May

With this being the wettest month, keeping an umbrella on hand might save you from getting wet from a sudden shower. Historically, the month has about 19 days of snow/rain, averaging 92 mm (3.6 in) in total. Rain falls on many days this month, but usually in relatively small amounts. A light waterproof is more useful than a heavy umbrella.

Temperature in Big Sky in May

In May, Big Sky gets moderate temperatures, with highs of 13°C (55°F). Nights cool to around -1°C (30°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. Nights drop below freezing to -1°C (30°F). An extra blanket is worth packing if you're unsure about the heating where you're staying.

If you prefer enjoying temperate temperatures and rain-free days, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.