Weather Almanac: Chinook, MT 59523

🗓️ Historical norms for October

October avg. precipitation
🌧️ 0.71"
October days below freezing
📉 ≈20.2 days
Average October lows 26°F – 31°F
USDA Zone
3b
Annual extreme lows -35°F to -30°F
Last Spring Frost (36°F)
🌷 Jun 3
First Fall Frost (36°F)
🍂 Sep 5

Temperature climatic data from weather station: CHINOOK (USC00241722)

Precipitation climatic data from weather station: CHINOOK (USC00241722)

Agricultural climatic data from weather station: HARLEM (USC00243929)