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Weather Almanac: Longmont, CO 80503

🗓️ Historical norms for May

April June
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
May avg. precipitation
🌧️ 2.22"
May days below freezing
📉 ≈3.4 days
Average May lows 38°F – 42°F
USDA Zone
6a
Annual extreme lows -10°F to -5°F
Last Spring Frost (36°F)
🌷 May 30
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First Fall Frost (36°F)
🍂 Sep 14
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📚 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: LONGMONT 2 ESE (USC00055116)

Precipitation climatic data from weather station: LONGMONT 2 ESE (USC00055116)

Agricultural climatic data from weather station: LONGMONT 2 ESE (USC00055116)