2018 Long Range Weather Forecast for Fairfax, VA

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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

AUGUST 2017: temperature 70° (1° below avg.); precipitation 1.5" (2" below avg.); Aug 1-4: Sunny, cool; Aug 5-11: A few t-storms; warm, then cool; Aug 12-19: Sunny, turning hot; Aug 20-25: T-storms, then sunny, nice; Aug 26-31: T-storms, then sunny, cool.

SEPTEMBER 2017: temperature 64° (avg.); precipitation 4.5" (1" above avg.); Sep 1-4: Sunny, cool; Sep 5-11: T-storms, then sunny, warm; Sep 12-17: A few showers, cool; Sep 18-22: Scattered t-storms, warm; Sep 23-26: Sunny, cool; Sep 27-30: T-storms.

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