Nearly $28 billion was spent online during the season to date, a 19 percent gain versus the corresponding days last year, according to a comScore update of holiday season e-commerce spending for the first 57 days of the 2007 holiday season (Nov. 1 - Dec. 27), writes MarketingCharts.

"Warm weather during the early part of November took its toll on online retail sales, and played a role in holding down the growth in spending over the entire holiday season to a 19 percent rate, which is below last year's level of 26 percent," said comScore Chairman Gian Fulgoni.

However, "even as the holiday shopping season winds down after Christmas, we continue to see some relatively strong online spending days," he also said: Online sales the day after Christmas, for example, totaled $545 million - more than double the sales during the same day last year.

Moreover, during the core of the holiday shopping season - the period between Thanksgiving and Christmas - online sales grew 21 percent compared with the year earlier period: $17.98 billion vs. $14.82 billion.

(This year, there were 32 days during that period, compared with 31 days last year.)

Top 10 Online Spending Days of the Holiday Season

With online retail spending having already peaked, Green Monday (Dec. 10) was the heaviest spending day of the season with $881 million in sales, according to comScore.

Cyber Monday (Nov. 26), the first major spike in online spending activity during the season, was the 9th-heaviest day with $733 million in sales.

comScore 2007 Retail E-Commerce Forecast