Research:
Rich Relevance’s analytics team conducted a comparative analysis on online sales during rainy days.
They surveyed 4 different verticals; home furniture, wholesale, clothing, and big-box stores (Home Depot, Walmart, etc.). It was discovered that on rainy days, sales increased by 10-12% in the home furniture, clothing, and wholesale, but little increase in big-box stores.
This is evidence to show that consumers spend more online during cold weather, but prefer to shop in big box stores when the weather's nice vs. online.