Freeport Weather Records

Freeport, Illinois weather averages and records from 1909–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Freeport, Illinois was 112 °F which occurred on July 14, 1936.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Freeport, Illinois was -31 °F which occurred on February 1, 2019.
Lowest Temperatures: All-Time By Year
Freeport Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 28.2 11.3 61 -31 1.6 9.4
February 32.8 14.8 76 -31 1.6 8.4
March 45.2 25.6 85 -21 2.1 3.7
April 58.5 36.4 93 9 3.7 0.9
May 70.1 48.4 106 24 4.4 0.0
June 79.6 58.6 106 33 5.3 0.0
July 82.7 62.3 112 41 4.2 0.0
August 80.9 59.9 102 31 4.4 0.0
September 74.6 51.0 101 23 4.1 0.0
October 61.7 39.3 90 6 3.0 0.2
November 46.3 28.2 78 -14 2.4 2.5
December 33.6 17.9 69 -29 1.8 8.5
Entire year 58.0 38.0 112 -31 38.4 32.8
More Freeport Weather Records
1909–2024
Highest daily low 78 °F July 20, 2019
Lowest daily high -15 °F February 3, 1996
Greatest daily range
(Difference of high and low)
59 °F February 28, 2024
Greatest difference in daily high
over two conscutive days
50 °F Jan 19–20, 1996
Most daily precipitation 9.1 inches August 21, 2002
Most monthly precipitation 14.1 inches September 2019
Most yearly precipitation 53.6 inches 2019
Most yearly days with precipitation 145 2019
Earliest snow in season October 18 1972
Latest snow in season May 11 1966
Most daily snow 14.0 inches April 16, 1921
Most monthly snow 35.6 inches January 1979
Most yearly snow 71.8 inches 2008
Most snow in a winter 70.4 inches 1978–1979
Greatest snow accumulation 33.0 inches January 19, 1979
Earliest freeze August 30 1915
Earliest day ≥ 80 °F March 16 2012
Earliest day ≥ 90 °F April 10 1930
Earliest day ≥ 100 °F May 31 1934
Latest freeze May 27 1915
Latest day ≥ 80 °F October 31 1950
Latest day ≥ 90 °F October 10 2010
Latest day ≥ 100 °F September 15 1939
Most days in a year < 0 °F 42 1977
Most days in a year < 32 °F 163 1996
Most days in a year ≥ 80 °F 118 1939
Most days in a year ≥ 90 °F 51 1936
Most days in a year ≥ 100 °F 15 1936
Most days in a year ≥ 110 °F 3 1936
Freeport Weather Streaks
Most consecutive days...
With precipitation 10 days Jun 18–27, 1969
Without precipitation 37 days Oct 16 – Nov 21, 1999
With snow 6 days Mar 3–8, 2003
High temperature at or
below freezing
43 days Dec 29, 1976 – Feb 9, 1977
High temperature ≥ 80 °F 65 days Jun 24 – Aug 27, 1936
High temperature ≥ 90 °F 15 days Jul 5–19, 1936
High temperature ≥ 100 °F 12 days Jul 6–17, 1936
High temperature ≥ 110 °F 3 days Jul 12–14, 1936
Plant Hardiness Zone
5B
Freeport is in plant hardiness zone 5B
based on average yearly minimum temperature from 1991–2020
Freeport Weather by Year
More Freeport Weather
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Weather Station Details
Years Station Coordinates
1973–2024 Freeport Waste Water Treatment location
1909–1973 Freeport location