WASHINGTON — Consumers slowed the growth in their spending in November and income growth was flat, two worrisome signs at the start of the holiday shopping season.

Consumer spending rose 0.2 percent in November, the weakest showing since a 0.1 percent rise in August, the Commerce Department reported Thursday. Spending had posted healthy gains of 0.7 percent in September and 0.4 percent in October.

Incomes were unchanged in November after gains of 0.5 percent in October and 0.4 percent in September.

So far, spending in the holiday shopping season has not been as strong as last year. That has prompted some stores to offer better deals and incentives.