Slidell climate

Slidell Weather in December

NOAA 1991-2020 normals for Slidell, 1.6 km from Slidell

Average highs run from 66°F on December 1 to 61°F on December 31, and lows from 46°F to 42°F. Normal precipitation for the month is 4.95 in over about 10 wet days.

December day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Slidell, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
63°F
Average low
44°F
Precipitation
4.95 in
Record high
84°FDec 7, 2022
Record low
17°FDec 20, 1996
Chance of a freeze
74%
Daylight
10 h 20 min to 10 h 14 min
Cloud cover
62%
Humidity
86%
Dew point
48°F
Wind
4.5 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Dec 166°F46°F82°F 201827°F 199928%0%
Dec 266°F46°F81°F 200728°F 200829%0%
Dec 365°F46°F79°F 202230°F 201929%0%
Dec 465°F46°F81°F 199828°F 200629%0%
Dec 565°F46°F82°F 201723°F 200629%0%
Dec 665°F45°F81°F 199528°F 200630%0%
Dec 765°F45°F84°F 202224°F 201030%0%
Dec 864°F45°F81°F 200724°F 200630%0%
Dec 964°F45°F81°F 202322°F 200631%0%
Dec 1064°F45°F83°F 202125°F 199531%0%
Dec 1164°F45°F82°F 202122°F 199531%0%
Dec 1264°F45°F80°F 201629°F 200831%0%
Dec 1363°F45°F81°F 201628°F 201032%0%
Dec 1463°F44°F80°F 202223°F 201032%0%
Dec 1563°F44°F79°F 200725°F 202532%0%
Dec 1663°F44°F80°F 201926°F 202532%0%
Dec 1763°F44°F80°F 201626°F 200733%0%
Dec 1863°F44°F79°F 202127°F 199633%0%
Dec 1962°F44°F78°F 200822°F 199633%0%
Dec 2062°F44°F78°F 201317°F 199633%0%
Dec 2162°F43°F80°F 202526°F 199634%0%
Dec 2262°F43°F80°F 201725°F 200034%0%
Dec 2362°F43°F78°F 201524°F 202234%0%
Dec 2462°F43°F79°F 201523°F 202234%0%
Dec 2562°F43°F80°F 201523°F 202234%0%
Dec 2661°F43°F80°F 201624°F 202234%0%
Dec 2761°F43°F80°F 201522°F 201034%0%
Dec 2861°F43°F80°F 202121°F 201035%0%
Dec 2961°F43°F83°F 202124°F 199535%0%
Dec 3061°F42°F84°F 202125°F 200035%0%
Dec 3161°F42°F84°F 202121°F 200035%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Slidell, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CST).

December 1
sunrise 6:38 AM, sunset 4:58 PM
December 31
sunrise 6:55 AM, sunset 5:09 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00168539 (Slidell), public domain. Records: NOAA GHCN-Daily, station USW00053865, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.