December was a generally weak month for the housing markets on Hawaii island and Kauai, though the softness did little to undermine what was mostly a positive year.

Hawaii Information Service released data Monday showing the number of sales and median prices for homes sold last month were mostly down. For the full year, however, those figures were mostly up.

On Hawaii island the median price for a single-family house declined 9 percent to $280,000 last month from $306,650 a year earlier. For the year the median price rose 14 percent to $295,000 from $260,000 in 2012. The number of houses sold last year climbed 17 percent to 1,880.

The number of condominium units sold on Hawaii island fell 19 percent in December to 44 from 54 a year earlier. Yet for all of 2013, sales rose 8 percent to 642 from 593 the year before.

The median condo sale price slumped 29 percent last month to $230,475 from $326,000 in the same month the year before. The full-year figure was down slightly, by 3 percent to $250,500 from $258,000 in 2012, representing the only full-year decline for the two neighbor island housing markets.

On Kauai the number of single-family house sales slipped by 11 percent to 42 in December from 47 a year earlier. For all of 2013, sales rose 6 percent to 449 from 422 a year earlier.

Kauai’s median single-family house sale price last month edged down 1 percent to $454,500 from $460,000 a year earlier. But there was a 14 percent gain for all of last year to $525,000 from $458,750 the year before.

In Kauai’s condo market the number of sales fell by 23 percent to 20 in December from 26 a year earlier. For the full year, sales volume rose 10 percent to 353 from 321 in 2012.

The median price for Kauai condos sold in December broke with the weakness trend by surging 51 percent to $410,000 last month from $272,500 a year earlier. The gain, however, was a modest 4 percent for all of last year, rising to $300,000 from $289,000 in 2012.