Ku Alaska, nyengo imasintha kuchoka kunyanja kupita ku subarctic, yomwe imasanduka nyanjayi. Izi zakhazikitsa mawonekedwe anyengo, chifukwa chake nyengo zisanu zimatha kusiyanasiyana. Pali gawo lalikulu m'mphepete mwa nyanja komanso madzi ambiri, mapiri ndi madera oundana.
Nyengo yam'madzi
Gawo lakumwera kwa chilumbachi lili m'nyengo yam'madzi, yomwe imakhudzidwa ndi nyengo ya Pacific Ocean. Amalowetsedwa m'malo ndi nyengo yam'nyanja yam'nyanja yomwe imazungulira chigawo cha Alaska. M'nyengo yotentha, nyengo imakhudzidwa ndi misa ya mpweya yomwe imazungulira kuchokera kudera la Bering Sea. Mafunde am'maiko akunja amawomba m'nyengo yozizira.
Pali malo osinthira pakati pa nyengo zakunja ndi nyanja. Nyengo yeniyeni yapanganso pano, yomwe imakhudzidwa ndi magulu akumlengalenga ndi akumpoto munthawi zosiyanasiyana pachaka. Nyengo yamakontinenti imakhudza zigawo zamkati mwa Alaska. Gawo lakumpoto kwenikweni kwa chilumbachi lili m'dera lam'mlengalenga. Awa ndi dera la Arctic Circle.
Mwambiri, ku Alaska, chinyezi chambiri komanso mpweya umatsika kuchokera 3000 mm mpaka 5000 mm pachaka, koma kuchuluka kwawo sikungafanane. Koposa zonse zimagwera mdera lamapiri, ndipo makamaka kugombe lakumpoto.
Ngati tikamba za kutentha kwa Alaska, ndiye kuti pafupifupi zimasiyanasiyana madigiri +4 mpaka -12 madigiri Celsius. M'miyezi yotentha, pano kutentha kumalembedwa madigiri +21. Kudera lam'nyanja, kumakhala madigiri + 15 nthawi yotentha, ndipo pafupifupi -6 m'nyengo yozizira.
Nyengo yozizira ya Alaska
Madera otentha ndi nkhalango amakhala m'malo otentha kwambiri. Apa chilimwe chimakhala chachifupi kwambiri, chifukwa chipale chofewa chimayamba kusungunuka koyambirira kwa Juni. Kutentha kumatenga pafupifupi milungu itatu kapena inayi. Pali masiku a polar usana ndi usiku kupitirira Arctic Circle. Pafupi ndi kumpoto kwa chilumbacho, mpweya umatsika mpaka 100 mm pachaka. M'nyengo yozizira, mdera lotentha, kutentha kumatsikira mpaka -40 madigiri. Zima zimatenga nthawi yayitali ndipo nthawi ino nyengo imakhala yovuta. Mphepo yamkuntho imagwa mchilimwe, kutentha kukakwera kufika madigiri oposa 16. Pakadali pano, kutengeka kwa mafunde apakatikati amawu akuwoneka pano.
Kumpoto chakumpoto kwa Alaska ndi zilumba zoyandikana ndi kotentha. Pali zipululu zamiyala zokhala ndi ndere, mosses, ndi madzi oundana. Zima zimatha pafupifupi chaka chonse, ndipo panthawiyi kutentha kumatsikira mpaka -40 madigiri. Palibe mvula. Komanso, kuno kulibe chilimwe, chifukwa kutentha sikumangokwera kuposa madigiri 0.
