🌷 Your Ultimate Garden Calendar!

Weather Almanac: Castle Rock, CO 80104

🗓️ Historical norms for May

April June
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
May avg. precipitation
🌧️ 2.18"
May days below freezing
📉 ≈2.2 days
Average May lows 40°F – 44°F
USDA Zone
5b
Annual extreme lows -15°F to -10°F
Last Spring Frost (36°F)
🌷 May 28
View full details
First Fall Frost (36°F)
🍂 Sep 18
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: CASTLE ROCK (USC00051401)

Precipitation climatic data from weather station: CASTLE ROCK (USC00051401)

Agricultural climatic data from weather station: CASTLE ROCK (USC00051401)