Weather StoryAlmanac, microseasons, and the day's weather story.

Weather in Mermentau, Louisiana

Roses open on the Piedmont edge. Day 59 of spring. Read this microseason across nine climate regions →

Mermentau, LA
Sunday, May 17 at 2:49 AM
73
°
Clear
Feels like
76°
Humidity
79%
Wind
8 mph
Sunrise
6:15 AM
Sunset
7:57 PM
Mermentau, LA
Hour by hour · 24h
76°
9p
75°
10p
74°
11p
73°
12a
72°
1a
71°
2a
70°
3a
69°
4a
69°
5a
68°
6a
68°
7a
73°
8a
77°
9a
79°
10a
82°
11a
83°
12p
84°
1p
85°
2p
85°
3p
84°
4p
82°
5p
81°
6p
77°
7p
76°
8p
L 68°H 85°
Mermentau, LA
7-day forecast
  1. Today
    May 16
    Overcast
    83°68°
  2. Sunday
    May 17
    Overcast
    11%
    84°73°
  3. Monday
    May 18
    Thunderstorm
    10%
    85°76°
  4. Tuesday
    May 19
    Light Showers
    13%
    89°73°
  5. Wednesday
    May 20
    Light Drizzle
    80%
    88°73°
  6. Thursday
    May 21
    Drizzle
    73%
    87°72°
  7. Friday
    May 22
    Overcast
    61%
    90°73°
Mermentau, LA
Anemometer · 24h winds · from true
NESW
From · True
SSE
153° · veering 23°
Direction
SSE
153°
Sustained
8
mph
Gust
15
mph
Peak 24h
19
avg 8
Beaufort · 3 · GENTLE BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 8 · pk 19 @ 8:00p
−24h−18h−12h−6hnow
Light breeze veering 23° from the sse.
Mermentau, LA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1013.1
-0.5 mb in 3h · falling · 29.92 inHg
Now
1013.1
mb
3h
-0.5
mb
12h
-2.5
mb
24h
-0.9
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 10131017
−24h−18h−12h−6hnow
Air sits at the threshold — small shifts decide the day.
Mermentau, LA
Air quality
48
AQI
Good
PM 2.5
10.3 μg/m³
PM 10
14.5 μg/m³
NO₂
1.4 μg/m³
Ozone
94.0 μg/m³
UV Index
0.0 Low
Mermentau, LA
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
10:51 AM
Sunrise
6:15 AM
Daylight
13h 42m
Sunset
7:57 PM
Civil dusk
1:25 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Mermentau, LA
The moon
New Moon
0% illuminated
Moonrise
11:33 AM
Moonset
1:19 AM
In sign
♊︎ Gemini
Mermentau, LA
Microseason · 28 of 72
May 16–20

Roses open on the Piedmont edge

insect
Jan 137% of the yearDec 31

Read this microseason across nine climate regions →

Mermentau at a glance

  • Today vs. normal: 8°F below the seasonal normal for this latitude
  • Last frost: February 16 (climatological average for this latitude)
  • Microseason: 28 of 72, May 16–20
  • Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.

Right now in the garden

Peak growing season

As of May 17, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.

ZIP codes in Mermentau

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.