What is the long range weather forecast for Gaithersburg, MD?

The Old Farmer's Almanac provides a 60-day extended weather forecast for Gaithersburg, MD. This includes temperature trends, precipitation predictions, and seasonal weather patterns based on our traditional forecasting methods combined with modern meteorological science.

How accurate is the Almanac long range weather forecast?

The Old Farmer's Almanac claims an 80% accuracy rate for its long range forecasts. Our forecasting method uses a secret formula that considers sunspot activity, tidal action, and other factors along with current meteorological conditions.

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Long-Range Weather Forecast for Gaithersburg, MD

Location Gaithersburg, MD

60-Day Weather Forecast

August 2026 Long Range Weather Forecast for Appalachians
Dates	Weather Conditions
Aug 1-12	Isolated t-storms, warm
Aug 13-20	Sunny; cool, then warmer
Aug 21-31	Scattered t-storms, mild
August	temperature 71° (1° below avg.) precipitation 2.5" (1" below avg.)

September 2026 Long Range Weather Forecast for Appalachians
Dates	Weather Conditions
Sep 1-6	Sunny, warm
Sep 7-12	Scattered showers, cooler
Sep 13-23	Isolated showers north, sunny south; cool, then warmer
Sep 24-27	Showers, cool
Sep 28-30	Showers north, sunny south; milder
September	temperature 63° (2° below avg.) precipitation 2" (2" below avg.)

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

12-Month Long-Range Weather Outlook

November 2025 to October 2026

Winter will be colder than normal, with below-normal precipitation. Snowfall will be below normal in the north and above south. The coldest periods will occur in mid- and late December, early and late January, and early February, while the most snow will arrive in late December, late January, early and late February, and mid-March. April and May will be warmer than normal, with below-normal rainfall in the north and above-normal south. Summer will be cooler than normal in the north and warmer south; rainfall will be below normal. The hottest periods are expected in early June and early July. Watch for a tropical depression in late June. September and October will be cooler and drier than normal.

See the complete 12-month weather forecast in The Old Farmer’s Almanac..

Weather Trend Graph

November 2025 to October 2026