🌷 Your Ultimate Garden Calendar!

Weather Almanac: Fort Collins, CO 80521

🗓️ Historical norms for September

August October
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
September avg. precipitation
🌧️ 1.33"
September days below freezing
📉 ≈0.5 days
Average September lows 46°F – 49°F
USDA Zone
5b
Annual extreme lows -15°F to -10°F
Last Spring Frost (36°F)
🌷 May 15
View full details
First Fall Frost (36°F)
🍂 Sep 24
View full details

Book Recommendations (ads!)

📚 Rocky Mountain Month-By-Month Gardening: What to Do Each Month to Have A Beautiful Garden All Year - Colorado, Idaho, Montana, Utah, Wyoming

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: FT COLLINS (USC00053005)

Precipitation climatic data from weather station: FT COLLINS (USC00053005)

Agricultural climatic data from weather station: FT COLLINS (USC00053005)