Longmont, Colorado Weather:
Monday, June 15, 2026
Cloudy Weather
Day 72°
Night 48°
Precipitation 55 %
Wind 6 mph
UV Index (0 - 11+) 7
Weather Forecast History
Last Year's Weather on This Day (June 15, 2025)
Sunny with a Chance of Thunderstorms

Day

93°

Night

57°

Wind

6 mph

UV Index

11

Precipitation

40 %