Climate almanac

Longmont

Colorado, US · 40.17°, -105.10°

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What is the climate like in Longmont?

Longmont is warmest in July, when daily highs average 89°F (32°C), and coolest in January, when lows fall to about 20°F (-7°C). The wettest month is typically May and the driest is December; the year sees roughly 20 in of precipitation.

  • Warmest monthJuly — average high 89°F (32°C)
  • Coolest monthJanuary — average low 20°F (-7°C)
  • Wettest monthMay (4.3 in)
  • Driest monthDecember (0.7 in)
  • Annual precipitation20 in