Montana, USA
Long term weather forecast
Long term weather forecast

May weather forecast and Climate
Boulder, MT

  • Average high temperature in May: 64°F

Warmest months (with highest average high temperature) are July and August (82°F).
Month with lowest average high temperature is January (33°F).

  • Average low temperature in May: 35°F

Month with highest average low temperature is July (48°F).
Coldest month (with lowest average low temperature) is January (9°F).

  • Average rainfall in May: 1.8"

Wettest month (with highest rainfall) is June (2.1").
Driest month (with lowest rainfall) is February (0.3").