9 3 9 ▁at ▁the ▁ 2 0 1 0 ▁census . ▁ ▁Geography ▁According ▁to ▁the ▁United ▁States ▁Census ▁Bureau , ▁the ▁town ship ▁has ▁a ▁total ▁area ▁of ▁ 2 1 . 6   square ▁miles ▁( 5 5 . 9   km 2 ), ▁all ▁of ▁it ▁land . ▁It ▁consists ▁mainly ▁of ▁rolling ▁hills ▁and ▁valle ys ▁and ▁is ▁dra ined ▁by ▁the ▁Sch u yl kill ▁River ▁mostly ▁via ▁the ▁Per ki omen ▁Creek . ▁Its ▁villages ▁include ▁F agle ys ville , ▁Frederick ▁( also ▁in ▁Upper ▁Frederick ▁Township , ) ▁Hoff mans ville , ▁L ay field , ▁New ▁Han over , ▁New ▁Han over ▁Square , ▁and ▁S ass am ans ville ▁( also ▁in ▁Doug lass ▁Township .) ▁Its ▁number ed ▁routes ▁are ▁ 7 3 ▁east - to - west ▁and ▁ 6 6 3 ▁north - to - s outh , ▁which ▁join ▁briefly ▁in ▁L ay field . ▁ ▁New ▁Han over ▁has ▁a ▁hot - sum mer ▁hum id ▁contin ental ▁climate ▁( D fa ) ▁and ▁is ▁in ▁hard iness ▁zones ▁ 6 b ▁and ▁ 7 a . ▁The ▁average ▁month ly ▁temper atures ▁in ▁L ay field ▁range ▁from ▁ 3 0 . 6 ° ▁F ▁in ▁January ▁to ▁ 7 5 . 3 ° ▁F ▁in ▁July . ▁ ▁The ▁average ▁annual ▁absolute ▁minimum ▁temperature ▁in ▁L ay field ▁is ▁ 0 . 6 ° ▁F . ▁ ▁Ad j acent ▁municipal ities ▁Upper ▁Han over