September weather forecast
Louisiana, USA

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 and 90°F. Meanwhile, the northern regions, which include towns like Ruston, typically see temperatures ranging from 81°F to 85°F.

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

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.

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• New Orleans - September »
  In New Orleans, during September, the rain falls for 11.7 days and regularly aggregates up to 0.47" of precipitation. May through September, with an average maximum UV index of 7, are months with the highest UV index in New Orleans, Louisiana.
• Baton Rouge - September »
  In Baton Rouge in September, during 17.6 rainfall days, 2.95" of precipitation is typically accumulated. In Baton Rouge the average relative humidity in September is 78%.
• 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" 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. In Lafayette, Louisiana, in September, during 14.9 rainfall days, 1.38" of precipitation is typically accumulated.
• Lake Charles - September »
  In Lake Charles, in September, during 19.1 rainfall days, 3.5" of precipitation is typically accumulated. In Lake Charles, in September, during 19.1 rainfall days, 3.5" of precipitation is typically accumulated.
• Kenner - September »
  Kenner transitions into September recording an average high-temperature of a still hot 86.5°F, closely aligning with the preceding month's temperature. In Kenner, during September, the rain falls for 17 days and regularly aggregates up to 3.82" of precipitation.
• Bossier City - September »
  The month with the least rainfall in Bossier City, Louisiana, is September, when the rain falls for 9.2 days and typically collects 0.63" of precipitation. In Bossier City, Louisiana, during September, the rain falls for 9.2 days and regularly aggregates up to 0.63" of precipitation.
• 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" of precipitation. In Monroe during September, the rain falls for 11.6 days and regularly aggregates up to 1.5" of precipitation.
• 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 »
  On the first day of September in Houma sunrise is at 6:40 am and sunset at 7:25 pm. In Houma, during September, the rain falls for 15.1 days and regularly aggregates up to 1.34" of precipitation.
• New Iberia - September »
  In September, in New Iberia, Louisiana, the rain falls for 13.8 days. How many hours of sunshine does New Iberia have in September?
• Slidell - September »
  On the first day of September in Slidell sunrise is at 6:35 am and sunset at 7:22 pm. In Slidell, Louisiana, in September, it is raining for 18.4 days, with typically 2.4" of accumulated precipitation.