U.S. consumer confidence increased for a second straight month in September, lifted by labor market resilience and falling gasoline prices, a survey showed on Tuesday.

The Conference Board said its consumer confidence index rose to 108.0 this month from 103.6 in August. Economists polled by Reuters had forecast the index climbing to 104.5.

The survey's present situation index, based on consumers' assessment of current business and labor market conditions, increased to 149.6 from 145.3 in August. Its expectations index, based on consumers' short-term outlook for income, business and labor market conditions, increased to 80.3 from 75.8 in August.