What a difference a week makes.

Last week was unseasonably hot, and this week is cooler than usual for the second week of February in Hawaii.

On Friday the high of 84 degrees at Kauai’s Lihue Airport tied a record set in 1991. On Feb. 2, Maui’s Kahului tied a high-temperature mark with an 87-degree high, and Honolulu tied a record with an 84-degree high temperature at the airport.

On Monday the low temperature of 56 degrees at Lihue tied a cold-weather record for the date.

The cool temperatures were expected to continue Monday night and could approach record lows overnight.

Cool, dry air behind a cold front that moved over the islands during the weekend caused temperatures to drop into the 50s in many places early Monday.

Honolulu Airport recorded a low of 59 degrees. It was 51 degrees at Kalaeloa Airport in West Oahu. The low temperature at Kahului Airport was 59 degrees, and Hilo was the warmest overnight with a 61-degree low.

Derek Wroe, a meteorologist with the Honolulu office of the National Weather Service, said Monday night was expected to be “much cooler than normal” because clear, dry conditions with light wind “tend to get the coolest nights.”

Tuesday night will be slightly warmer, but temperatures could still dip into the 50s in many areas.

The rest of the week will be closer to the usual winter temperatures, with lows in the 60s to low 70s overnight.