As of 16:49 CDT

Weather in Mermentau, LA

79°Current weather

Mermentau, Monday, 26 October, 16:49

Clear. Feels like 79°. High 79°, low 57°.

Pressure30.15 inHg
Wind10.4 mph NE
Humidity27%
Visibility6.2 mi
Dew point42°

Monthly outlook for Mermentau, LA: average high 77.5°, average low 58.3°. That is 2.2° above the climate normal for October. Precipitation is expected on 1 day (about 0.4 inches), against a normal of 4 days and 2.1 inches. The warmest day looks like 1 November (86.6°), the coolest 6 November (47.4°).

77.5°/58.3°
Average high / low
+2.2°
Above normal
1 / 4
Wet days / normal
0.4 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
26 October – 4 November79.9°74.3°+3.1°
5 November – 14 November73.5°71.2°+1.3°
15 November – 24 Novemberat normal68.8°—

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).

Tue, 2781° / 56°0Overcast
81 °Overcast

Mermentau, Tuesday, 27 October

Overcast. High 81°, low 56°.

Pressure30.21 inHg
Wind6.2 mph SE
Humidity56%
Visibility6.2 mi
Dew point60°
Wed, 2881° / 56°0Clear
81 °Clear

Mermentau, Wednesday, 28 October

Clear. High 81°, low 56°.

Pressure30.21 inHg
Wind5.1 mph E
Humidity47%
Visibility6.2 mi
Dew point57°
Thu, 2982° / 60°0Clear
82 °Clear

Mermentau, Thursday, 29 October

Clear. High 82°, low 60°.

Pressure30.18 inHg
Wind4 mph NE
Humidity43%
Visibility6.2 mi
Dew point55°
Fri, 3083° / 61°0Overcast
83 °Overcast

Mermentau, Friday, 30 October

Overcast. High 83°, low 61°.

Pressure30.06 inHg
Wind6.9 mph E
Humidity49%
Visibility6.2 mi
Dew point57°
Sat, 3176° / 70°0.38Light rain
76 °Light rain

Mermentau, Saturday, 31 October

Light rain. High 76°, low 70°.

Pressure30.03 inHg
Wind8.5 mph SE
Humidity87%
Visibility—
Dew point71°
Sun, 0187° / 68°0Overcast
87 °Overcast

Mermentau, Sunday, 1 November

Overcast. High 87°, low 68°.

Pressure30.00 inHg
Wind4 mph SW
Humidity56%
Visibility—
Dew point65°
Mon, 0286° / 70°0Overcast
86 °Overcast

Mermentau, Monday, 2 November

Overcast. High 86°, low 70°.

Pressure29.88 inHg
Wind14.5 mph SW
Humidity49%
Visibility—
Dew point62°
Tue, 0376° / 60°0Clear
76 °Clear

Mermentau, Tuesday, 3 November

Clear. High 76°, low 60°.

Pressure29.88 inHg
Wind14.6 mph NW
Humidity31%
Visibility—
Dew point42°
Wed, 0467° / 53°0Clear
67 °Clear

Mermentau, Wednesday, 4 November

Clear. High 67°, low 53°.

Pressure29.97 inHg
Wind16.9 mph NW
Humidity42%
Visibility—
Dew point41°
Thu, 0566° / 48°0Overcast
66 °Overcast

Mermentau, Thursday, 5 November

Overcast. High 66°, low 48°.

Pressure30.12 inHg
Wind9.1 mph NW
Humidity44%
Visibility—
Dew point38°
Fri, 0667° / 47°0Clear
67 °Clear

Mermentau, Friday, 6 November

Clear. High 67°, low 47°.

Pressure30.15 inHg
Wind9.3 mph N
Humidity42%
Visibility—
Dew point38°
Sat, 0772° / 48°0Clear
72 °Clear

Mermentau, Saturday, 7 November

Clear. High 72°, low 48°.

Pressure30.12 inHg
Wind7.4 mph SE
Humidity41%
Visibility—
Dew point42°
Sun, 0873° / 55°0Overcast
73 °Overcast

Mermentau, Sunday, 8 November

Overcast. High 73°, low 55°.

Pressure30.09 inHg
Wind8.7 mph E
Humidity56%
Visibility—
Dew point54°
Mon, 0981° / 66°0Mostly clear
81 °Mostly clear

Mermentau, Monday, 9 November

Mostly clear. High 81°, low 66°.

Pressure29.97 inHg
Wind10.3 mph SW
Humidity45%
Visibility—
Dew point55°
Tue, 1082° / 57°0Clear
82 °Clear

Mermentau, Tuesday, 10 November

Clear. High 82°, low 57°.

Pressure29.94 inHg
Wind6.7 mph N
Humidity20%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Tue, 2467° / 52°0.11Climate normal
67 °Climate normal

Mermentau, Tuesday, 24 November

Climate normal for this date — 60-year average.

Average high67°
Average low52°
Average precipitation0.11 in
Chance of precipitation28%
Record high80° (2025)
Record low32° (1970)

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.