2018 Long Range Weather Forecast for Allentown, PA

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How to Read Long-Range Weather Forecasts

Long-range predictions show weather trends in temperatures and precipitation. For example, will the winter be colder or warmer than average? Will there be more or less snow than what's typical for your area?  Our famous predictions (traditionally 80% accurate) are made 18 months in advance, and meant to help you make more informed decisions for long-term planning.

Here on Almanac.com, we provide free long-range forecasts for the next 30 to 60 days covering U.S. and Canadian regions. Find all 12 months of predictions in the annual Old Farmer's Almanac.

Free 2-Month Weather Forecast

OCTOBER 2017: temperature 50° (3° below avg.); precipitation 2" (1" below avg.); Oct 1-4: Sunny, chilly; Oct 5-10: Showers; cool north, warm south; Oct 11-19: Showers, then sunny, chilly; Oct 20-25: Showers, cool; Oct 26-31: Showers; cool north, mild south.

NOVEMBER 2017: temperature 42.5° (4° below avg. north, 1° above south); precipitation 6" (4" above avg. north, 1" above south); Nov 17: Rain, some heavy; Nov 811: Sunny, cold; Nov 1217: Rain, then flurries, cold; Nov 1822: Rain, then flurries; Nov 2326: Snow, then sunny, mild; Nov 2730: Rainy, mild.

Annual Weather Summary: November 2017 to October 2018

Winter will be warmer than normal, with above-normal precipitation and below-normal snowfall. The coldest periods will be in late December, early and mid-January, and early and mid-February. The snowiest periods will be in mid- to late November, early and mid- to late January, and mid-March. April and May will be rainier and cooler than normal. Summer will be hotter and slightly rainier than normal, with the hottest periods in early June, early July, and late August. September and October will be warmer and slightly drier than normal.

Map showing Old Farmer's Almanac long range weather region number 3

About the Appalachians Region

The Appalachians long range weather region includes all or part of the following states: MARYLAND (Aspen Hill, Bethesda, Frederick, Gaithersburg, Silver Spring), NEW JERSEY (Augusta, Belvidere, Branchville, Newton, Swartswood), NEW YORK (Auburn, Binghamton, Elmira, Ithaca, Syracuse), NORTH CAROLINA (Asheville, Hickory, Kernersville, Morganton, Winston-Salem), PENNSYLVANIA (Allentown, Altoona, Lancaster, Reading, Scranton), TENNESSEE (Mountain City, Roan Mountain, Trade), VIRGINIA (Arlington, Burke, Lynchburg, Reston, Roanoke), WEST VIRGINIA (Charles Town, Keyser, Martinsburg, Petersburg, Ranson).

Appalachians Neighboring Regions

Here are the regions that neighbor the Appalachians long range weather region:

Temperature and Precipitation November 2017 to October 2018

Temperature and Precipitation Graph