🌷 Your Ultimate Garden Calendar!

Weather Almanac: Mertztown, PA 19539

🗓️ Historical norms for May

April June
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
May avg. precipitation
🌧️ 4.41"
May days below freezing
📉 ≈0.8 days
Average May lows 45°F – 51°F
USDA Zone
6b
Annual extreme lows -5°F to 0°F
Last Spring Frost (36°F)
🌷 May 19
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First Fall Frost (36°F)
🍂 Sep 24
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Book Recommendations (ads!)

📚 Pennsylvania Month-by-Month Gardening: What to Do Each Month to Have A Beautiful Garden All Year

📚 Mid-Atlantic Gardener's Handbook, 2nd Edition: All You Need to Know to Plan, Plant & Maintain a Mid-Atlantic Garden

📚 The Timber Press Guide to Vegetable Gardening in the Northeast

F: Forecast
H: Normal High Temp
L: Normal Low Temp
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.

Temperature climatic data from weather station: RODALE RSCH CTR (USC00367578)

Precipitation climatic data from weather station: RODALE RSCH CTR (USC00367578)

Agricultural climatic data from weather station: RODALE RSCH CTR (USC00367578)