| NWS Forecast for: Longmont CO Issued by: National Weather Service Denver-Boulder, CO Last Update: 12:46 pm MDT Jul 18, 2026 |  |
Tonight: Mostly clear, with a low around 64. East wind around 6 mph becoming light and variable. Sunday: Sunny and hot, with a high near 98. Light and variable wind becoming east southeast around 6 mph in the afternoon. Sunday Night: Mostly clear, with a low around 66. East wind around 6 mph becoming light and variable after midnight. Monday: Sunny and hot, with a high near 100. Calm wind becoming east 5 to 8 mph in the morning. Winds could gust as high as 15 mph. Monday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 66. East northeast wind 7 to 9 mph becoming north northwest after midnight. Winds could gust as high as 17 mph. Chance of precipitation is 30%. Tuesday: A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 93. Tuesday Night: A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 62. Wednesday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 94. Wednesday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 63. Thursday: Showers and thunderstorms likely after noon. Partly sunny, with a high near 90. Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Friday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 63. Saturday: A chance of showers and thunderstorms. Mostly sunny, with a high near 92. | |
| Longmont CO 40.16°N 105.12°W (Elev. 5000 ft) | |
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