Singapore's stock market closed lower on Monday, with the city-state reporting a decline in non-oil domestic exports in October.

The Straits Times Index, a key benchmark for the Singapore Exchange, ranged between 3,727.94 and 3,754.82 throughout the day. It ended the session at 3,732.55, down 12.15 points or 0.32% compared to Friday's close.

In economic news, Singapore's non-oil domestic exports (NODX) declined 4.6% in October, following a 0.9% expansion in August, according to data released by Enterprise Singapore. On a seasonally adjusted month-on-month basis, the city-state's NODX declined by 7.4% to SG$13.6 billion, from SG$14.6 billion in September.

In company news, shares of Singapore Technologies Engineering's shares were down nearly 6% even after the company's revenue for the January till September period rose 14% to SG$8.3 million from SG$7.3 million a year earlier.

LHN surged nearly 6% on Singapore bourse, after the company forecasted a net profit before tax of at least SG$50 million from continuing operations for the year ended Sept. 30.

Meanwhile, SDAI loss attributable to owners was down 36% to SG$761,629 in the third quarter of the year from SG$1.2 million a year earlier.