Slidell Weather Records

Slidell, Louisiana weather averages and records from 1956–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Slidell, Louisiana was 104 °F which occurred on June 21, 1964.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Slidell, Louisiana was 8 °F which occurred on January 21, 1985.
Lowest Temperatures: All-Time By Year
Slidell Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 61.3 41.6 81 8 6.0 0.0
February 64.8 45.6 86 15 4.5 0.0
March 70.8 51.4 89 22 5.2 0.1
April 76.7 57.7 92 32 5.5 0.0
May 83.6 65.7 95 41 5.7 0.0
June 88.5 71.9 104 50 5.9 0.0
July 90.1 73.8 102 57 7.8 0.0
August 90.3 73.5 103 58 7.6 0.0
September 87.1 69.6 99 42 4.9 0.0
October 79.8 59.2 94 31 4.1 0.0
November 70.3 49.2 90 24 4.3 0.0
December 63.2 43.8 86 9 4.9 0.0
Entire year 77.3 58.7 104 8 65.8 0.1
More Slidell Weather Records
1956–2024
Highest daily low 88 °F June 16, 1963
Lowest daily high 27 °F December 23, 1989
Greatest daily range
(Difference of high and low)
49 °F January 19, 1996
Greatest difference in daily high
over two conscutive days
41 °F Dec 9–10, 1978
Most daily precipitation 13.4 inches May 10, 1995
Most monthly precipitation 26.1 inches May 1995
Most yearly precipitation 103.1 inches 1991
Most yearly days with precipitation 143 1975
Most daily snow 2.0 inches March 12, 1993
Most monthly snow 2.0 inches March 1993
Most yearly snow 2.0 inches 1993
Most snow in a winter 2.0 inches 1992–1993
Greatest snow accumulation 9.0 inches December 31, 1963
Earliest freeze October 28 1957
Earliest day ≥ 90 °F April 10 2021
Latest freeze March 24 1968
Latest day ≥ 90 °F November 20 1965
Most days in a year < 32 °F 43 1978
Most days in a year ≥ 80 °F 211 1985
Most days in a year ≥ 90 °F 114 1986
Most days in a year ≥ 100 °F 3 2023
Slidell Weather Streaks
Most consecutive days...
With precipitation 11 days Dec 22, 2015 – Jan 1, 2016
Without precipitation 39 days Sep 23 – Oct 31, 1963
High temperature ≥ 80 °F 158 days Apr 26 – Sep 30, 1962
High temperature ≥ 90 °F 56 days Jul 9 – Sep 2, 2023
Plant Hardiness Zone
9A
Slidell is in plant hardiness zone 9A
based on average yearly minimum temperature from 1991–2020
Slidell Weather by Year
More Slidell Weather
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Weather Station Details
Years Station Coordinates
1956–2024 Slidell location