Montana Weather in May

May in Montana brings moderate temperatures around 12°C (54°F) during the day, dropping to 1°C (34°F) at night, with quite a bit of rainfall expected, averaging around 156 mm (6.1 in) for the month.

Rainfall in Montana in May

You can expect rain on roughly 19 days based on historical data, averaging 156 mm (6.1 in) for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Montana in May

If you're visiting Montana in May, expect highs of 12°C (54°F) and overnight lows around 1°C (34°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to 1°C (34°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Montana in May

Expect sunny days throughout the month, with an estimated 230 hours of sunshine. Despite the cool temperatures, the sunny skies make it a pleasant time to visit Montana.

Wind Speed in Montana in May

Wind speeds average 2 m/s (4 knots) during May. At this speed, expect light breezes that you can feel on your face and cause leaves to rustle gently. Since this is an average, some days are calmer with barely any wind while others have more noticeable gentle breezes.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. July and August typically offer the best weather for Montana.