Though tonight, Thursday night, is only the 11th of Tamuz, it is most likely the last night of the month that you could say Kiddush Levana.
This is because Motzo’ei Shabbos it will most likely be cloudy and Sunday night will be thunderstorms.
This applies to much of the tri-state area including Lakewood, Jackson, Toms River etc, Brooklyn, Monsey, Monroe, Fallsburg, Philadelphia, and Baltimore.
(Friday night will be clear, but the minhag is not to say Kiddush Levana then.)
Tonight will be very clear all night so if you didn’t say yet, say it tonight.