 This forecast is brought to you by Montana Outdoor Sports. Rafts, kayaks, and fun on the water. Follow your dreams, discover your nature at Montana Outdoor Sports. Partly cloudy skies, tonight lows near 55. Clouds increasing on Sunday, potential for a shower or thundershower as the afternoon wears on. Highs in the upper 70s. Sunday night risk for an evening shower or thundershower, then clearing. Lows near 55. Partial sunshine through clouds on Monday. Breezy highs in the upper 70s.