Mermentau Weather Forecast 15 Days, Weather in Mermentau Today
Current weather conditions and 15 day weather forecast for Mermentau, Louisiana, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Mermentau
| 22 May 2026 Friday 31 ° C / 87.8°F  Partly cloudy |
Feels Like : 34.7 ° C / 94.5°F Humidity : % 63 Pressure : 1011 mb Wind Speed : 16.2 kmph / 10.1 miles from SSW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 50 |
15 day weather forecast for Mermentau, LA, USA
Weather Forecast for next 15 Days for Mermentau including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Mermentau, Louisiana state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 22 May 2026 Friday | Partly Cloudy |
21.5 ° C (70.7°F) |
32.6 ° C (90.7°F) |
25.9 ° C (78.6°F) |
% 81 | 0% | 9.5 | Sunrise:06:12 AM Sunset: 08:01 PM |
Moonrise:11:53 AM Moonset: 12:55 AM Moon Phase ( First Quarter ) |
|
| 23 May 2026 Saturday |  Heavy rain |
20.2 ° C (68.4°F) |
30.5 ° C (87°F) |
24 ° C (75.2°F) |
% 87 | 85% | 8.3 | Sunrise:06:12 AM Sunset: 08:01 PM |
Moonrise:11:53 AM Moonset: 12:55 AM Moon Phase ( First Quarter ) |
|
| 24 May 2026 Sunday | Heavy rain |
20.1 ° C (68.2°F) |
23 ° C (73.3°F) |
21.1 ° C (70.1°F) |
% 96 | 85% | 2.2 | Sunrise:06:12 AM Sunset: 08:01 PM |
Moonrise:11:53 AM Moonset: 12:55 AM Moon Phase ( First Quarter ) |
|
| 25 May 2026 Monday |  Moderate rain |
20.1 ° C (68.2°F) |
28 ° C (82.4°F) |
23.5 ° C (74.3°F) |
% 87 | 86% | 9.1 | Sunrise:06:12 AM Sunset: 08:01 PM |
Moonrise:11:53 AM Moonset: 12:55 AM Moon Phase ( First Quarter ) |
|
| 26 May 2026 Tuesday | Moderate rain |
21.1 ° C (70°F) |
29.7 ° C (85.5°F) |
25.2 ° C (77.3°F) |
% 80 | 89% | 7.7 | Sunrise:06:12 AM Sunset: 08:01 PM |
Moonrise:11:53 AM Moonset: 12:55 AM Moon Phase ( First Quarter ) |
|
| 27 May 2026 Wednesday |  Patchy rain nearby |
23.1 ° C (73.6°F) |
27.5 ° C (81.5°F) |
24.2 ° C (75.5°F) |
% 91 | 60% | 0.2 | Sunrise:06:12 AM Sunset: 08:01 PM |
Moonrise:11:53 AM Moonset: 12:55 AM Moon Phase ( First Quarter ) |
|
| 28 May 2026 Thursday | Patchy rain nearby |
23.5 ° C (74.2°F) |
31.7 ° C (89.1°F) |
26.9 ° C (80.3°F) |
% 79 | 85% | 6 | Sunrise:06:12 AM Sunset: 08:01 PM |
Moonrise:11:53 AM Moonset: 12:55 AM Moon Phase ( First Quarter ) |
|
| 29 May 2026 Friday | Patchy rain nearby |
23.3 ° C (73.9°F) |
31.7 ° C (89.1°F) |
26.8 ° C (80.3°F) |
% 83 | 84% | 6 | Sunrise:06:12 AM Sunset: 08:01 PM |
Moonrise:11:53 AM Moonset: 12:55 AM Moon Phase ( First Quarter ) |
|
| 30 May 2026 Saturday | Patchy rain nearby |
22.6 ° C (72.8°F) |
28.1 ° C (82.6°F) |
25.2 ° C (77.4°F) |
% 88 | 88% | 6 | Sunrise:06:12 AM Sunset: 08:01 PM |
Moonrise:11:53 AM Moonset: 12:55 AM Moon Phase ( First Quarter ) |
|
| 31 May 2026 Sunday | Patchy rain nearby |
20 ° C (68.1°F) |
27.3 ° C (81.2°F) |
22.6 ° C (72.7°F) |
% 80 | 86% | 5 | Sunrise:06:12 AM Sunset: 08:01 PM |
Moonrise:11:53 AM Moonset: 12:55 AM Moon Phase ( First Quarter ) |
|
| 01 June 2026 Monday |  Sunny |
16.5 ° C (61.6°F) |
26.2 ° C (79.2°F) |
20.8 ° C (69.4°F) |
% 70 | 0% | 6 | Sunrise:06:12 AM Sunset: 08:01 PM |
Moonrise:11:53 AM Moonset: 12:55 AM Moon Phase ( First Quarter ) |
|
| 02 June 2026 Tuesday | Sunny |
14.8 ° C (58.6°F) |
24.6 ° C (76.3°F) |
19.3 ° C (66.8°F) |
% 70 | 0% | 5 | Sunrise:06:12 AM Sunset: 08:01 PM |
Moonrise:11:53 AM Moonset: 12:55 AM Moon Phase ( First Quarter ) |
|
| 03 June 2026 Wednesday | Sunny |
14.9 ° C (58.8°F) |
26.2 ° C (79.2°F) |
20.2 ° C (68.3°F) |
% 69 | 0% | 6 | Sunrise:06:12 AM Sunset: 08:01 PM |
Moonrise:11:53 AM Moonset: 12:55 AM Moon Phase ( First Quarter ) |
|
| 04 June 2026 Thursday | Sunny |
17.6 ° C (63.7°F) |
29 ° C (84.2°F) |
22.9 ° C (73.3°F) |
% 65 | 0% | 6 | Sunrise:06:12 AM Sunset: 08:01 PM |
Moonrise:11:53 AM Moonset: 12:55 AM Moon Phase ( First Quarter ) |
|
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