NEW YORK — Last week, temperatures in Gotham climbed back up out of winter lows, while Broadway began an ascent from the dip it took during the prior frame.Nearly every show saw improvements over the previous sesh, with total Rialto grosses increasing by more than $2.3 million to about $17.7 million for 31 shows on the boards. Adding to the cume was the first week of “The Pirate Queen” ($615,584), playing seven perfs to crowds at 85% capacity. The other big tuner in previews in this play-heavy spring, “Curtains,” took in $556,019 and attracted 80% capacity crowds. Biggest rise of the week was the revival of “Les Miserables” ($672,531), which stepped up by more than $150,000 — perhaps due in part to fans turning out for Lea Salonga (“Miss Saigon”), who played her first full week in the production. Three recently opened plays — “Talk Radio” ($188,080), “Prelude to a Kiss” ($152,747) and “Journey’s End” ($149,845) — remain on the lower end of the grosses spectrum, although Monday’s raves for Liev Schreiber in “Radio” may goose sales. “The Vertical Hour” ($286,084) played its last, as did the revival of tuner “The Apple Tree” ($364,086). The 25 musicals grossed $16,206,467 for 91.4% of the Broadway total, with attendance of 218,971 at 86.1% capacity. The six plays grossed $1,534,415 for 8.6% for the Broadway total, with attendance 28,463 at 64.0% capacity. Average paid admission was $74.01 for musicals, $53.91 for plays and $71.70 for all shows.