Apparel retailers are among the most weather-sensitive businesses. Traditionally, the seasons shifted between mid-August and early September. However, with fall and winter arriving later than usual, retailers are complaining about stocking up and declining sales. Are winters becoming shorter overall? Are the number of cold winter days, which most stimulate apparel sales, also decreasing?

Winters are indeed becoming shorter overall, with fewer cold days—a trend that is affecting apparel retailers profoundly.

Are Winters Becoming Shorter?

• Global data shows a consistent pattern: Across the Northern and Southern Hemispheres, winters are now noticeably shorter than in previous decades. For example, New Zealand’s winters are about a month shorter than 80 years ago. The Norwegian Meteorological Institute reports that the average number of winter days (defined by temperatures below freezing) dropped from 118 per year in 1961-1990 to 96 per year in 1991-2020. In Europe and North America, climate data reveal a surge in winter days with above-freezing temperatures, and what’s called “season creep”—earlier springs, longer summers, and delayed autumns—is now mainstream.
• In the U.S., cold streaks are shrinking: Since 1970, 98% of U.S. cities analyzed have seen their longest winter cold streaks shrink by about six days on average, with nearly half seeing a reduction of one week or more. The number of unusually warm winter days has also increased, with most locations experiencing about five additional extremely warm winter days annually compared to the 1970s.

Are the Number of Cold Days Decreasing?

• Drop in cold winter days is global: Both the U.S. and Europe report fewer days below historical cold thresholds. For example, New York City has gained 13 more “lost winter days” (above freezing during what used to be winter) each year just in the past decade. Scientific projections warn this trend will only intensify: at a 2°C global warming scenario, some analyses project a 60%-80% reduction in extreme cold winter days in Northern Europe.

Impact on Apparel Retailers

• Buying and inventory misalignment: Retailers, using long-standing seasonal calendars, often stock fall and winter goods in August or early September. When cold weather arrives weeks later, shoppers delay purchases—resulting in poor sales, excess inventory, and higher markdowns.
• Reduced urgency: With the number of genuinely cold days falling, consumers feel less need to quickly purchase winter coats, heavy jackets, or boots. Demand is now more unpredictable and spikes typically only with abrupt cold snaps rather than over sustained periods.
• Marketing & promotional strategy disruption: The traditional promotional cadence (timed around reliably cold weather) no longer aligns with actual consumer demand, further eroding profits unless strategies are adapted.

Inspiration for Aspiring Entrepreneurs

This story offers valuable lessons and opportunity:

• Embrace Agility: The fashion calendar is being disrupted by climate shifts. Entrepreneurs who respond quickly to real-time climate data, adjusting inventory and promotions to actual weather—not by historic calendar—will outperform competitors.
• Leverage Data-Driven Decisions: Use weather analytics, sales data, and consumer behavior insights to forecast demand more precisely and optimize stock levels.
• Diversify Product Offerings: Consider introducing transitional and seasonless apparel, or products that adapt across a wider temperature range, to reduce reliance on any one season’s fortunes.
• Sustainability & Storytelling: As consumers grow more climate-aware, brands can build loyalty by focusing on sustainable materials and climate-resilient strategies—making the weather challenge a brand asset, not a liability.

Ultimately, adapting rapidly to changing conditions and embracing innovation over tradition is what sets the most resilient retailers—and entrepreneurs—apart in a less predictable world.