September weather forecast
Louisiana, USA

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Flag of Louisiana, USA

Weather in September

September marks the transition from the peak summer heat to the early hints of fall in Louisiana. The southern regions of the state, encompassing areas like Baton Rouge, generally observe daytime highs between 86°F (30°C) and 90°F (32.2°C). Meanwhile, the northern regions, which include towns like Ruston, typically see temperatures ranging from 81°F (27.2°C) to 85°F (29.4°C).

Nighttimes begin to show the first subtle signs of cooling. In the southern part of the state, nighttime temperatures hover between 68°F (20°C) and 72°F (22.2°C). In contrast, the northern sections experience slightly cooler nights, with lows ranging from 63°F (17.2°C) to 67°F (19.4°C).

Rainfall begins to diminish in September, although afternoon thunderstorms with brief, heavy downpours can still be prevalent. The frequency of these storms, however, is generally reduced compared to the earlier summer months. This reduction signifies the beginning of the shift from the wet season to the drier months ahead.

In comparison to August, September typically experiences a slight decrease in both temperature and humidity, especially as the month progresses. The heat is less intense, and there is a palpable freshness in the air during early mornings and late evenings. That said, September remains within the hurricane season's window. This fact necessitates that both residents and visitors stay informed about possible tropical systems, as the state remains vulnerable to hurricanes and tropical storms during this month.

  • New Orleans - September »
    In New Orleans, in September, during 11.7 rainfall days, 0.47" (12mm) of precipitation is typically accumulated. In New Orleans, in September, during 11.7 rainfall days, 0.47" (12mm) of precipitation is typically accumulated.
  • Baton Rouge - September »
    On the last day of September, sunrise is at 6:57 am and sunset at 6:51 pm CDT. In Baton Rouge, during September, the rain falls for 17.6 days and regularly aggregates up to 2.95" (75mm) of precipitation.
  • Shreveport - September »
    The month with the least rainfall in Shreveport is September, when the rain falls for 9.2 days and typically collects 0.63" (16mm) of precipitation. September in Shreveport marks the gradual end of the intense summer heat.
  • Lafayette - September »
    Relief from the heat begins in September as Lafayette, Louisiana starts moving towards fall. Lafayette's weather in September displays an average high-temperature of a still hot 86.7°F (30.4°C), showing minor disparity from August's 90°F (32.2°C).
  • Lake Charles - September »
    In Lake Charles in September, during 19.1 rainfall days, 3.5" (89mm) of precipitation is typically accumulated. On the first day of September in Lake Charles, sunrise is at 6:49 am and sunset at 7:36 pm.
  • Kenner - September »
    On the first day of September in Kenner sunrise is at 6:37 am and sunset at 7:23 pm. In Kenner, during September, the rain falls for 17 days and regularly aggregates up to 3.82" (97mm) of precipitation.
  • Bossier City - September »
    In Bossier City, in September, during 9.2 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. On the first day of September in Bossier City sunrise is at 6:49 am and sunset at 7:40 pm.
  • Monroe - September »
    The month with the least rainfall in Monroe is September, when the rain falls for 11.6 days and typically collects 1.5" (38mm) of precipitation. On the first day of September in Monroe sunrise is at 6:43 am and sunset at 7:33 pm.
  • Alexandria - September »
    September brings a noticeable dip in temperature from the heat of August, marking the inception of cooler weather in Alexandria, Louisiana. On the last day of September, in Alexandria, sunrise is at 7:02 am and sunset at 6:56 pm CDT.
  • Houma - September »
    In Houma in September, during 15.1 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. On the first day of September in Houma sunrise is at 6:40 am and sunset at 7:25 pm.
  • New Iberia - September »
    On the first day of September in New Iberia sunrise is at 6:44 am and sunset at 7:30 pm. In New Iberia in September, it is raining for 13.8 days, with typically 1.18" (30mm) of accumulated precipitation.
  • Slidell - September »
    In Slidell during September, the rain falls for 18.4 days and regularly aggregates up to 2.4" (61mm) of precipitation. Slidell, Louisiana, experiences an average high-temperature of a still tropical 87.3°F (30.7°C) in September, marking an insignificant shift from 90.7°F (32.6°C) in August.
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Louisiana, USA

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