United States · 1991–2020

Best time to visit
Mermentau.

April leads for comfortable weather in Mermentau: typically 25.2°C by day, 14.4°C at night, with 122 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortApril

Typical high25.2°C

Typical low14.4°C

Rain in April122 mm

Comfort

April

April · October · March

80climate match

Beach

May

May · September · October

71climate match

Outdoors

March

March · November · February

79climate match

The weakest month is August, scoring 30 against April’s 80 — days average 32.9°C, 9° above the 24°C the score treats as ideal, and 173 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

3215.7° / 5.4°

Feb

5217.9° / 7.3°

Mar

7321.6° / 10.8°

Apr

8025.2° / 14.4°

May

5928.9° / 18.8°

Jun

3631.6° / 22.2°

Jul

3632.4° / 23.2°

Aug

3032.9° / 22.9°

Sep

4731.1° / 20.6°

Oct

7527° / 14.8°

Nov

6521.2° / 9.5°

Dec

4517.1° / 6.5°

Monthly climate evidence for Mermentau — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	15.7°C	5.4°C	160 mm	9	10 h 24	32	Strong coverage
February	17.9°C	7.3°C	108 mm	7.5	11 h 04	52	Strong coverage
March	21.6°C	10.8°C	96 mm	6.7	11 h 54	73	Strong coverage
April	25.2°C	14.4°C	122 mm	5.9	12 h 52	80	Strong coverage
May	28.9°C	18.8°C	139 mm	6.5	13 h 39	59	Strong coverage
June	31.6°C	22.2°C	171 mm	10.7	14 h 05	36	Strong coverage
July	32.4°C	23.2°C	136 mm	11.2	13 h 55	36	Strong coverage
August	32.9°C	22.9°C	173 mm	10.6	13 h 14	30	Strong coverage
September	31.1°C	20.6°C	147 mm	7.7	12 h 19	47	Strong coverage
October	27°C	14.8°C	120 mm	6	11 h 23	75	Strong coverage
November	21.2°C	9.5°C	124 mm	7	10 h 35	65	Strong coverage
December	17.1°C	6.5°C	120 mm	8.1	10 h 12	45	Strong coverage

What has changed

Mermentau runs +0.2°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

+0.6

Feb

+0.9

Mar

+0.7

Apr

-0.5

May

-0.5

Jun

0.0

Jul

-0.3

Aug

+0.2

Sep

+0.2

Oct

+0.5

Nov

-0.2

Dec

+0.8

April daytime highs, 2011–2025. Last recorded: 26.1°C.

Records at JENNINGS, 1897–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	28.3°C8 Jan 1898	-13.9°C22 Jan 2025	220 mm10 Jan 2013	445 mm2013 · driest 9 mm in 1928	129
February	30.6°C21 Feb 1917	-12.8°C12 Feb 1899	152 mm5 Feb 1955	325 mm1955 · driest 14 mm in 1911	129
March	33.3°C30 Mar 1946	-6.7°C4 Mar 2002	145 mm25 Mar 1973	296 mm1973 · driest 2 mm in 1955	129
April	36.1°C29 Apr 1915	0.0°C5 Apr 1920	310 mm14 Apr 1967	399 mm1957 · driest 6 mm in 1987	129
May	37.8°C30 May 1911	3.9°C1 May 1913	211 mm18 May 1953	552 mm1907 · driest 0 mm in 1898	129
June	40.0°C13 Jun 1911	7.8°C1 Jun 1903	264 mm27 Jun 1957	518 mm1940 · driest 0 mm in 1936	128
July	40.6°C13 Jul 1901	15.0°C13 Jul 1898	110 mm11 Jul 1975	331 mm1911 · driest 20 mm in 1997	129
August	41.7°C28 Aug 2023	15.0°C16 Aug 1963	353 mm15 Aug 1938	613 mm2016 · driest 11 mm in 2023	128
September	41.7°C1 Sep 2000	6.1°C30 Sep 1920	239 mm24 Sep 2005	436 mm1943 · driest 13 mm in 1956	129
October	36.7°C2 Oct 1915	-2.8°C31 Oct 1917	223 mm10 Oct 2020	439 mm2002 · driest 0 mm in 1963	128
November	35.0°C3 Nov 1901	-5.6°C30 Nov 1956	196 mm10 Nov 1940	464 mm1929 · driest 2 mm in 1967	128
December	31.7°C2 Dec 1917	-12.2°C24 Dec 1989	202 mm29 Dec 1924	434 mm1912 · driest 24 mm in 1919	129

Typical days per month at JENNINGS, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	<1	0	6	4
February	2	0	3	3
March	9	0	<1	3
April	19	1	0	3
May	29	13	0	3
June	30	25	0	5
July	31	28	0	4
August	31	28	0	5
September	29	22	0	4
October	23	8	0	3
November	9	<1	1	3
December	3	0	4	4

The best month has moved. On the 1961–1990 numbers the strongest month here was April (scoring 83); on 2011–2025 it is October (83). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in JENNINGS’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	26%	27%	12%	29%	13.3–19.5°C
February	36%	26%	12%	26%	15.2–21.8°C
March	59%	22%	10%	18%	19.6–24.8°C
April	76%	20%	10%	16%	24.1–27.6°C
May	77%	22%	12%	23%	28.0–30.7°C
June	72%	28%	13%	35%	30.6–34.0°C
July	64%	36%	15%	46%	31.7–34.5°C
August	68%	32%	14%	39%	31.9–34.5°C
September	75%	26%	12%	27%	30.0–33.4°C
October	79%	18%	8%	15%	25.8–29.4°C
November	53%	22%	11%	22%	19.2–24.5°C
December	29%	27%	13%	29%	15.3–20.2°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.

1900Each stripe is one year’s mean temperature against the 121-year average. Warmest: 1933. Coolest: 1983.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4333147
NOAA station: USC00164700 · JENNINGS
Station distance: 7.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 30.19°, mid-month, sunrise to sunset including refraction. Not a station measurement.
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 JENNINGS is what differs

Jennings→Welsh→Gueydan→Morse→Roanoke→Lacassine→

Or put two places side by side: Mermentau vs Jennings

Best time to visitMermentau.

April

May

March

The whole year,without the guesswork.

Mermentau runs +0.2°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Mermentau.

The whole year,
without the guesswork.

Mermentau runs +0.2°C
on the 1961–1990 baseline.

Nearby, measured,
and named.