Sunday, May 18, 2025. Longmont, CO - Weather Forecast

Longmont, Colorado Weather:

Sunday, May 18, 2025

Day 66°

Night 41°

Precipitation 87 %

Wind 12 mph

UV Index (0 - 11+) 6

Weather Forecast History

Last Year's Weather on This Day (May 18, 2024)

Day

81°

Night

46°