United States · 1991–2020

Best time to visit
Slidell.

October leads for comfortable weather in Slidell: typically 26.6°C by day, 15.1°C at night, with 103 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high26.6°C

Typical low15.1°C

Rain in October103 mm

Comfort

October

October · April · November

80climate match

Beach

September

September · May · June

74climate match

Outdoors

November

November · February · March

79climate match

The weakest month is July, scoring 27 against October’s 80 — days average 32.3°C, 8° above the 24°C the score treats as ideal, and 200 mm of rain falls.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

3616.3° / 5.4°

Feb

5318.3° / 7.4°

Mar

6721.6° / 10.8°

Apr

7824.9° / 14.3°

May

5928.7° / 18.7°

Jun

4131.4° / 22.2°

Jul

2732.3° / 23.2°

Aug

2832.4° / 23°

Sep

5130.7° / 20.9°

Oct

8026.6° / 15.1°

Nov

6821.3° / 9.5°

Dec

4617.4° / 6.6°

Monthly climate evidence for Slidell — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 19 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	16.3°C	5.4°C	153 mm	8.2	13.7°C	10 h 23	36	Strong coverage
February	18.3°C	7.4°C	108 mm	7.2	14.3°C	11 h 04	53	Strong coverage
March	21.6°C	10.8°C	136 mm	6.9	17.6°C	11 h 54	67	Strong coverage
April	24.9°C	14.3°C	140 mm	6.2	21.5°C	12 h 52	78	Strong coverage
May	28.7°C	18.7°C	147 mm	6.4	25.4°C	13 h 40	59	Strong coverage
June	31.4°C	22.2°C	152 mm	9.1	28.8°C	14 h 05	41	Strong coverage
July	32.3°C	23.2°C	200 mm	11.9	29.8°C	13 h 55	27	Strong coverage
August	32.4°C	23°C	193 mm	11.3	30.0°C	13 h 14	28	Strong coverage
September	30.7°C	20.9°C	124 mm	7.8	28.2°C	12 h 19	51	Strong coverage
October	26.6°C	15.1°C	103 mm	5.4	24.0°C	11 h 23	80	Strong coverage
November	21.3°C	9.5°C	110 mm	5.9	19.2°C	10 h 35	68	Strong coverage
December	17.4°C	6.6°C	124 mm	8.2	15.7°C	10 h 12	46	Strong coverage

What has changed

Slidell runs -0.3°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

-0.2

Feb

+0.9

Mar

+0.3

Apr

-1.0

May

-0.8

Jun

-0.7

Jul

-0.8

Aug

-0.3

Sep

-0.3

Oct

0.0

Nov

-0.6

Dec

+0.1

October daytime highs, 2011–2025. Last recorded: 28.2°C.

Records at SLIDELL, 1956–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	27.2°C10 Jan 1972	-13.3°C21 Jan 1985	142 mm25 Jan 1978	555 mm1991 · driest 6 mm in 2003	71
February	30.0°C6 Feb 1957	-9.4°C5 Feb 1996	109 mm2 Feb 2005	272 mm1979 · driest 6 mm in 1989	71
March	31.7°C31 Mar 1963	-5.6°C3 Mar 1980	245 mm17 Mar 1961	353 mm1961 · driest 6 mm in 2013	70
April	33.3°C28 Apr 1987	0.0°C4 Apr 1987	184 mm7 Apr 1983	408 mm1991 · driest 1 mm in 1999	70
May	35.0°C31 May 1977	5.0°C4 May 2013	341 mm10 May 1995	664 mm1995 · driest 0 mm in 1998	70
June	40.0°C21 Jun 1964	10.0°C1 Jun 1984	221 mm19 Jun 2021	562 mm2001 · driest 8 mm in 1977	71
July	38.9°C16 Jul 1980	13.9°C16 Jul 1967	192 mm21 Jul 1958	378 mm2020 · driest 34 mm in 1986	70
August	39.4°C2 Aug 1970	14.4°C11 Aug 1976	254 mm30 Aug 2021	467 mm2012 · driest 34 mm in 1976	70
September	37.2°C2 Sep 1989	5.6°C30 Sep 1967	173 mm26 Sep 2002	422 mm1998 · driest 8 mm in 1995	70
October	34.4°C5 Oct 2019	-0.6°C28 Oct 1957	158 mm23 Oct 2007	323 mm2002 · driest 0 mm in 2005	69
November	32.2°C20 Nov 1965	-4.4°C30 Nov 1976	136 mm29 Nov 1997	421 mm1992 · driest 5 mm in 2017	69
December	30.0°C5 Dec 1961	-12.8°C23 Dec 1989	121 mm2 Dec 2023	540 mm2009 · driest 36 mm in 1958	68

Typical days per month at SLIDELL, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	<1	0	7	4
February	2	0	3	3
March	8	0	<1	4
April	17	<1	0	4
May	29	12	0	3
June	30	25	0	5
July	31	28	0	6
August	31	28	0	5
September	29	21	0	4
October	23	5	0	2
November	7	0	1	3
December	2	0	4	4

The best month has moved. On the 1961–1990 numbers the strongest month here was April (scoring 82); on 2011–2025 it is October (82). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in SLIDELL’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	21%	27%	13%	30%	13.9–19.2°C
February	31%	27%	13%	29%	15.6–20.9°C
March	54%	24%	12%	23%	19.7–23.7°C
April	76%	20%	10%	17%	23.4–27.0°C
May	78%	22%	11%	25%	27.8–30.3°C
June	70%	30%	13%	38%	30.6–33.2°C
July	64%	37%	17%	52%	31.4–33.9°C
August	64%	36%	16%	48%	31.6–33.8°C
September	73%	27%	13%	28%	29.6–32.0°C
October	79%	17%	8%	15%	25.6–28.2°C
November	54%	21%	10%	19%	19.6–24.1°C
December	27%	27%	12%	29%	15.7–20.0°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1956Each stripe is one year’s mean temperature against the 64-year average. Warmest: 2023. Coolest: 1976.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4341727
NOAA station: USC00168539 · SLIDELL
Station distance: 1.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 30.28°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 19 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from SLIDELL is what differs

Eden Isle→Abney Country Air→Abney Estates→Audubon Place→Audubon Place Plaza→Avery Estates→

Or put two places side by side: Slidell vs Eden Isle

Best time to visitSlidell.