Montana Weather in May

Montana in May sees high temperatures, with highs around 23°C (73°F) and overnight lows of 12°C (54°F). Rainfall is fairly high at around 94 mm (3.7 in) on average, so pack waterproofs just in case.

Rainfall in Montana in May

Historically, May sees about 10 days of rain, with a monthly average of 94 mm (3.7 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Montana in May

May in Montana is generally excellent, with days reaching 23°C (73°F) and nights settling around 12°C (54°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 12°C (54°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

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