As of 02:48 CDT

Weather in Mermentau, LA

57°Current weather

Mermentau, Sunday, 25 October, 02:48

Clear. Feels like 57°. High 80°, low 54°.

Pressure30.27 inHg
Wind3.4 mph E
Humidity94%
Visibility6.2 mi
Dew point56°

Monthly outlook for Mermentau, LA: average high 85.8°, average low 65.1°. That is 6.7° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 4 days and 2.2 inches. The warmest day looks like 8 November (91.3°), the coolest 25 October (54.4°).

85.8°/65.1°
Average high / low
+6.7°
Above normal
1 / 4
Wet days / normal
0.1 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
25 October – 3 November84.3°74.7°+5.3°
4 November – 13 November88.4°71.5°+9.4°
14 November – 23 Novemberat normal69°—

October records over 66 years

93.9°4 October 2019All-time high
36.7°31 October 1993All-time low

Climate normals and records are computed from the nearest reference point — Lake Arthur (9 mi).

Mon, 2680° / 56°0Overcast
80 °Overcast

Mermentau, Monday, 26 October

Overcast. High 80°, low 56°.

Pressure30.27 inHg
Wind6 mph E
Humidity46%
Visibility6.2 mi
Dew point54°
Tue, 2782° / 60°0Partly cloudy
82 °Partly cloudy

Mermentau, Tuesday, 27 October

Partly cloudy. High 82°, low 60°.

Pressure30.18 inHg
Wind7.6 mph SE
Humidity54%
Visibility6.2 mi
Dew point60°
Wed, 2882° / 62°0Overcast
82 °Overcast

Mermentau, Wednesday, 28 October

Overcast. High 82°, low 62°.

Pressure30.18 inHg
Wind5.5 mph E
Humidity52%
Visibility6.2 mi
Dew point59°
Thu, 2982° / 59°0Partly cloudy
82 °Partly cloudy

Mermentau, Thursday, 29 October

Partly cloudy. High 82°, low 59°.

Pressure30.18 inHg
Wind7.3 mph NE
Humidity35%
Visibility—
Dew point47°
Fri, 3085° / 62°0.01Light rain
85 °Light rain

Mermentau, Friday, 30 October

Light rain. High 85°, low 62°.

Pressure30.06 inHg
Wind8 mph SE
Humidity50%
Visibility—
Dew point59°
Sat, 3186° / 64°0Mostly clear
86 °Mostly clear

Mermentau, Saturday, 31 October

Mostly clear. High 86°, low 64°.

Pressure30.09 inHg
Wind12.2 mph SE
Humidity47%
Visibility—
Dew point60°
Sun, 0188° / 67°0Clear
88 °Clear

Mermentau, Sunday, 1 November

Clear. High 88°, low 67°.

Pressure30.15 inHg
Wind9.3 mph SE
Humidity48%
Visibility—
Dew point62°
Mon, 0290° / 69°0Clear
90 °Clear

Mermentau, Monday, 2 November

Clear. High 90°, low 69°.

Pressure30.12 inHg
Wind11.2 mph S
Humidity46%
Visibility—
Dew point62°
Tue, 0388° / 69°0Clear
88 °Clear

Mermentau, Tuesday, 3 November

Clear. High 88°, low 69°.

Pressure30.00 inHg
Wind13.6 mph S
Humidity39%
Visibility—
Dew point57°
Wed, 0488° / 69°0Clear
88 °Clear

Mermentau, Wednesday, 4 November

Clear. High 88°, low 69°.

Pressure29.97 inHg
Wind13.4 mph SW
Humidity44%
Visibility—
Dew point61°
Thu, 0590° / 69°0Clear
90 °Clear

Mermentau, Thursday, 5 November

Clear. High 90°, low 69°.

Pressure30.03 inHg
Wind10.7 mph S
Humidity44%
Visibility—
Dew point61°
Fri, 0688° / 71°0.01Light rain
88 °Light rain

Mermentau, Friday, 6 November

Light rain. High 88°, low 71°.

Pressure30.00 inHg
Wind15.5 mph S
Humidity50%
Visibility—
Dew point65°
Sat, 0786° / 70°0Overcast
86 °Overcast

Mermentau, Saturday, 7 November

Overcast. High 86°, low 70°.

Pressure29.97 inHg
Wind14.1 mph SW
Humidity46%
Visibility—
Dew point60°
Sun, 0891° / 69°0Mostly clear
91 °Mostly clear

Mermentau, Sunday, 8 November

Mostly clear. High 91°, low 69°.

Pressure30.00 inHg
Wind12.1 mph SW
Humidity42%
Visibility—
Dew point61°
Mon, 0986° / 71°0.09Light rain
86 °Light rain

Mermentau, Monday, 9 November

Light rain. High 86°, low 71°.

Pressure30.06 inHg
Wind10.9 mph N
Humidity43%
Visibility—
Dew point59°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 1072° / 56°0.06Climate normal
72 °Climate normal

Mermentau, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high72°
Average low56°
Average precipitation0.06 in
Chance of precipitation23%
Record high83° (2020)
Record low32° (1991)
Wed, 1171° / 56°0.09Climate normal
71 °Climate normal

Mermentau, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high71°
Average low56°
Average precipitation0.09 in
Chance of precipitation30%
Record high83° (2020)
Record low35° (2025)
Thu, 1270° / 54°0.11Climate normal
70 °Climate normal

Mermentau, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high70°
Average low54°
Average precipitation0.11 in
Chance of precipitation20%
Record high81° (2020)
Record low36° (1968)
Fri, 1368° / 53°0.09Climate normal
68 °Climate normal

Mermentau, Friday, 13 November

Climate normal for this date — 60-year average.

Average high68°
Average low53°
Average precipitation0.09 in
Chance of precipitation18%
Record high82° (2005)
Record low26° (2019)
Sat, 1469° / 54°0.07Climate normal
69 °Climate normal

Mermentau, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high69°
Average low54°
Average precipitation0.07 in
Chance of precipitation23%
Record high81° (1964)
Record low36° (2014)
Sun, 1569° / 54°0.09Climate normal
69 °Climate normal

Mermentau, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high69°
Average low54°
Average precipitation0.09 in
Chance of precipitation23%
Record high81° (2011)
Record low31° (2018)
Mon, 1669° / 54°0.18Climate normal
69 °Climate normal

Mermentau, Monday, 16 November

Climate normal for this date — 60-year average.

Average high69°
Average low54°
Average precipitation0.18 in
Chance of precipitation27%
Record high81° (2025)
Record low35° (1970)
Tue, 1770° / 54°0.08Climate normal
70 °Climate normal

Mermentau, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high70°
Average low54°
Average precipitation0.08 in
Chance of precipitation22%
Record high82° (2024)
Record low35° (2019)
Wed, 1870° / 55°0.23Climate normal
70 °Climate normal

Mermentau, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high70°
Average low55°
Average precipitation0.23 in
Chance of precipitation33%
Record high83° (2025)
Record low35° (2014)
Thu, 1969° / 55°0.13Climate normal
69 °Climate normal

Mermentau, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high69°
Average low55°
Average precipitation0.13 in
Chance of precipitation30%
Record high84° (2025)
Record low32° (2014)
Fri, 2069° / 53°0.14Climate normal
69 °Climate normal

Mermentau, Friday, 20 November

Climate normal for this date — 60-year average.

Average high69°
Average low53°
Average precipitation0.14 in
Chance of precipitation28%
Record high82° (2025)
Record low35° (1980)
Sat, 2168° / 53°0.09Climate normal
68 °Climate normal

Mermentau, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high68°
Average low53°
Average precipitation0.09 in
Chance of precipitation25%
Record high83° (2025)
Record low36° (2006)
Sun, 2268° / 52°0.08Climate normal
68 °Climate normal

Mermentau, Sunday, 22 November

Climate normal for this date — 60-year average.

Average high68°
Average low52°
Average precipitation0.08 in
Chance of precipitation22%
Record high82° (2025)
Record low34° (2000)
Mon, 2368° / 52°0.15Climate normal
68 °Climate normal

Mermentau, Monday, 23 November

Climate normal for this date — 60-year average.

Average high68°
Average low52°
Average precipitation0.15 in
Chance of precipitation32%
Record high80° (1973)
Record low34° (1975)

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Mermentau, LA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Mermentau, LA since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.