Dillon Weather Records

Dillon, Montana weather averages and records from 1895–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Dillon, Montana was 102 °F which occurred on July 12, 2002.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Dillon, Montana was -41 °F which occurred on January 13, 2024.
Lowest Temperatures: All-Time By Year
Dillon Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧
January 33.6 14.4 58 -41 0.1
February 36.8 15.7 64 -40 0.2
March 46.4 22.8 79 -26 0.5
April 54.3 28.7 85 -5 1.1
May 63.7 37.0 90 14 1.7
June 72.3 43.6 98 25 1.9
July 84.1 49.5 102 31 0.8
August 82.2 47.8 101 25 0.8
September 71.5 40.8 97 9 1.0
October 56.7 30.4 86 -13 0.7
November 42.3 20.6 79 -29 0.4
December 31.8 12.5 65 -37 0.3
Entire year 56.3 30.4 102 -41 9.4
More Dillon Weather Records
1895–2024
Highest daily low 71 °F July 30, 1934
Lowest daily high -21 °F February 2, 1989
Greatest daily range
(Difference of high and low)
59 °F January 15, 1943
Greatest difference in daily high
over two conscutive days
55 °F Jan 26–27, 1951
Most daily precipitation 2.4 inches September 3, 1901
Most monthly precipitation 9.2 inches May 1908
Most yearly precipitation 24.4 inches 1915
Most yearly days with precipitation 119 1907
Earliest freeze August 11 1896
Earliest day ≥ 80 °F April 19 1962
Earliest day ≥ 90 °F May 19 1954
Latest freeze July 30 1913
Latest day ≥ 80 °F October 22 2003
Latest day ≥ 90 °F September 15 2000
Most days in a year < 0 °F 40 1955
Most days in a year < 32 °F 212 1911
Most days in a year ≥ 80 °F 86 1919
Most days in a year ≥ 90 °F 31 2003
Most days in a year ≥ 100 °F 1 2002
Dillon Weather Streaks
Most consecutive days...
With precipitation 14 days May 30 – Jun 12, 1925
Without precipitation 72 days Dec 16, 1975 – Feb 25, 1976
High temperature at or
below freezing
38 days Dec 26, 1936 – Feb 1, 1937
High temperature ≥ 80 °F 51 days Jun 25 – Aug 14, 1910
High temperature ≥ 90 °F 14 days Aug 1–14, 1971
Plant Hardiness Zone
5A
Dillon is in plant hardiness zone 5A
based on average yearly minimum temperature from 1991–2020
Facts About Dillon Weather
Dillon Weather by Year
More Dillon Weather
Compare Dillon to
Weather Station Details
Years Station Coordinates
1941–2024 Dillon Airport location
1895–1940 University of Montana Western location