Granby, Colorado, nestled at an elevation of 7,935 feet in the Fraser River valley, experiences a diverse climate characterized by distinct seasonal variations. Understanding these patterns can help residents and visitors prepare for the year’s weather.
Winter (December to February)
Winters in Granby are cold and snowy. Average high temperatures range from 28.5°F (-1.9°C) in January to 32.7°F (0.4°C) in February, with lows dipping to 0.8°F (-17.3°C) in January. Snowfall is significant, contributing to the town’s winter landscape.
Spring (March to May)
Spring brings a gradual warming trend. March sees average highs around 42.9°F (6.1°C), increasing to 62.3°F (16.8°C) by May. However, temperatures can still be chilly, with lows ranging from 13.8°F (-10.1°C) in March to 29.9°F (-1.2°C) in May. Precipitation increases during this period, with May receiving approximately 1.55 inches (39.37 mm) of rainfall.
Summer (June to August)
Summers are comfortable and relatively dry. July is typically the warmest month, with average highs reaching 79.1°F (26.2°C) and lows around 42.4°F (5.8°C). Rainfall is moderate, with July receiving about 1.41 inches (35.81 mm).
Autumn (September to November)
Autumn sees cooling temperatures and decreasing daylight. September averages highs of 70.2°F (21.2°C), dropping to 42.1°F (5.6°C) by November. Lows range from 33.5°F (0.8°C) in September to 13.9°F (-10.1°C) in November. Precipitation remains moderate, with November receiving around 0.77 inches (19.56 mm).
Additional Climate Information
Granby falls within Plant Hardiness Zone 4a, indicating average annual extreme minimum temperatures between -30°F and -25°F (-34.4°C to -31.7°C). The area experiences over 180 days with frost annually, with the average last frost occurring between June 1 and June 10, and the first frost between August 21 and August 31.
Understanding these climate patterns is essential for planning activities, gardening, and preparing for seasonal changes in Granby.