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Weather Almanac: East Helena, MT 59635

🗓️ Historical norms for May

April June
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
May avg. precipitation
🌧️ 1.92"
May days below freezing
📉 ≈2.5 days
Average May lows 39°F – 42°F
USDA Zone
5a
Annual extreme lows -20°F to -15°F
Last Spring Frost (36°F)
🌷 Jun 8
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First Fall Frost (36°F)
🍂 Sep 14
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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: CANYON FERRY DAM (USC00241470)

Precipitation climatic data from weather station: CANYON FERRY DAM (USC00241470)

Agricultural climatic data from weather station: CANYON FERRY DAM (USC00241470)