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Weather Almanac: Grand Portage, MN 55605

🗓️ Historical norms for September

August October
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
September avg. precipitation
🌧️ 3.49"
September days below freezing
📉 ≈1.9 days
Average September lows 41°F – 46°F
USDA Zone
4b
Annual extreme lows -25°F to -20°F
Last Spring Frost (36°F)
🌷 Always
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First Fall Frost (36°F)
🍂 Always
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Book Recommendations (ads!)

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

📚 Grow Great Vegetables Minnesota and Wisconsin

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

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: GRAND PORTAGE (USC00213296)

Precipitation climatic data from weather station: GRAND PORTAGE (USC00213296)

Agricultural climatic data from weather station: GRAND PORTAGE (USC00213296)