Longmont, Colorado Weather:
Monday, May 18, 2026
Partly Sunny with Showers
Day 75°
Night 46°
Precipitation 40 %
Wind 7 mph
Weather Forecast History
Last Year's Weather on This Day (May 18, 2025)
Sunny with a Chance of Thunderstorms

Day

64°

Night

46°

Wind

12 mph

UV Index

5

Precipitation

70 %