Chamber of Commerce weather continues in the Valley

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By Tami Hoey By Tami Hoey

PHOENIX -- Afternoons in the mid 80s, abundant sunshine and low humidity is what drives snowbirds to the Valley of the Sun. These delightful conditions have arrived, and they look like they’ll stick around for the whole week.

A trough of low pressure tracking east of Arizona is creating a dip in the jet stream. This is pumping relatively cool air into the state and keeping daytime highs in the Valley five to seven degrees cooler than normal. The seasonal average in Phoenix for this time of year is 89.

Monday night in Phoenix, expect clear skies and a low of 59. Tuesday’s high should be 85. Wednesday, the afternoon high in Phoenix will dip to 83.

Meanwhile, tropical storm Octave is southwest of western Baja California and tracking northeast. It’s expected to weaken to a tropical depression Tuesday as it makes landfall. Forecasting models indicate Arizona will not see much in the way of impacts from Octave, mostly because our air mass remains much too dry for rain to develop.

Patchy clouds may move through from time to time Tuesday and Wednesday, with a slim threat of a shower across extreme southeastern Arizona early Wednesday morning.