2020-2021 Long Range Weather Forecast for Harrisburg, PA

Get the Long Range Weather for Your Location

See long range weather forecasts for the next 60 days from The Old Farmer’s Almanac! Our long range forecasts can be used to make more informed decisions about future plans that depend on the weather, from vacations and weddings to sporting events and outdoor activities.

To see long term forecasts for the entire year, pick up a copy of The 2021 Old Farmer’s Almanac, available online and in stores.

Note: Long range forecasts are regional, not city-specific.

Free 2-Month Weather Forecast

August 2020 Long Range Weather Forecast for Appalachians
DatesWeather Conditions
Aug 1-9A few t-storms, turning warm
Aug 10-14Sunny, cool
Aug 15-19T-storms, hot
Aug 20-22Sunny, nice
Aug 23-25Showers, cool
Aug 26-31A few t-storms, warm
Augusttemperature 71.5° (1° below avg. north, 2° below south)
precipitation 3.5" (1" below avg. north, 1" above south)

September 2020 Long Range Weather Forecast for Appalachians
DatesWeather Conditions
Sep 1-5Rainy, cool north; sunny, warm south
Sep 6-9Sunny, cool
Sep 10-19Rainy periods, mild
Sep 20-24Sunny, mild
Sep 25-30T-storms, then sunny, cool
Septembertemperature 62° (2° below avg.)
precipitation 5.5" (2" above avg.)

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, Frederick, Gaithersburg, Germantown, Rockville), NEW YORK (Binghamton, Cortland, Elmira, Ithaca, Johnson City), NORTH CAROLINA (Asheville, Hickory, Lenoir, Morganton, Winston-Salem), PENNSYLVANIA (Allentown, Bethlehem, Lancaster, Reading, Scranton), VIRGINIA (Burke, Dale City, Lynchburg, Reston, Roanoke), WEST VIRGINIA (Martinsburg).

Appalachians Neighboring Regions

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

Temperature and Precipitation November 2019 to October 2020

Temperature and Precipitation Chart, November 2019 to October 2020 for Harrisburg, PA

Reader Comments

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Oct 31st wedding

In PA having a Halloween wedding. Just curious what the almanac says for that day. Wanted to do outdoor ceremony.

August 2020 Wedding

We are planning an August 1, 2020 evening wedding. Does it look like we need a tent or just a lot of fans? In the Amissville, VA area.

New Year's Even Wedding

Our wedding is scheduled for New Year's Eve (12/31/20) and we are hoping for snow! Any idea what the weather will during that week in the Pocono, PA area?


Getting married Nov 21 2020 Christiansburg VA what will the weather be,

Amanda August 29th wed

Idk if the almanac can predict that far but I know for boone nc typically the high is in the low 70s can be anything 60-80 on average and the low is usually about 50 can be anywhere 39-60 fall foilage may have started on an abnormally cold year and rain is 50/50 snow is impossible until september for boone. Chances are it'll be a nice day but maybe bring sweater for night time

August wedding

We are planing an outside wedding for august 8,2020 in Artimus,PA are we going to have ok wedding weather or should we plan for a tent?


I predict that Tina’s daughter will have a wonderful Wedding out doors 10/31/2020.

I predict that Jeffrey Foster will consume bad sushi this year, inadvertently ingesting Diphyllobothrium latum, the common Fish Tape Worm.

The Oracle has Spoken

Predicting weather, down to the day

Not sure if some of you have EVER used an Almanac in the past?!
Just ant FYI, it's NOT a fortune teller !


Some of these questions are asking specifically about a single day- does the almanac actually predict down to the day and even time of day like some of these questions are asking? Or is that as nutty as it seems to ask?

Halloween Wedding

My daughter is getting married on Halloween this year and wants to have the ceremony outside here in Charles Town, WV. Will the weather permit or should we plan on an inside ceremony?