| NWS Forecast for: Longmont CO Issued by: National Weather Service Denver-Boulder, CO Last Update: 12:46 pm MDT Jul 21, 2026 | |
Tonight: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 3am. Mostly cloudy, then gradually becoming mostly clear, with a low around 65. East wind 5 to 9 mph becoming light and variable. Winds could gust as high as 15 mph. Chance of precipitation is 30%. Wednesday: Showers and thunderstorms likely, mainly after 3pm. Increasing clouds, with a high near 93. North northwest wind 5 to 9 mph becoming east northeast in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 60%. Wednesday Night: A chance of showers and thunderstorms before midnight, then a chance of showers between midnight and 3am. Mostly cloudy, with a low around 64. North wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 40%. Thursday: Showers likely and possibly a thunderstorm between noon and 3pm, then showers and thunderstorms likely after 3pm. Mostly sunny through mid morning, then becoming cloudy, with a high near 88. Light and variable wind. Chance of precipitation is 70%. Thursday Night: Showers likely and possibly a thunderstorm before 9pm, then showers likely between 9pm and midnight. Mostly cloudy, with a low around 63. Light and variable wind. Chance of precipitation is 60%. Friday: A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 94. Friday Night: Partly cloudy, with a low around 65. Saturday: Sunny and hot, with a high near 98. Saturday Night: A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 66. Sunday: A slight chance of showers and thunderstorms after noon. Sunny and hot, with a high near 98. Sunday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. Monday: A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 98. Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Tuesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 95. | |
| Longmont CO 40.16°N 105.12°W (Elev. 5000 ft) | |
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