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United StatesThe weather in September in Grand Lake
It's hot in September in Grand Lake with an average temperature of 32°C. Temperatures this month range from a low of 29°C to a high of 34°C. At night, you can expect temperatures between 21°C and 25°C.
Looking for sun? September isn’t a good month to be in Grand Lake. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Grand Lake, Louisiana. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 38°C in 2023, Grand Lake reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 23°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of 11°C to a highest value of 27°C.
Rainfall amount
In September, there is an average of 170 mm of precipitation, spread over 18 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
Daily weather in September for Grand Lake
Click on any day in September to get detailed info about the usual weather on that day in Grand Lake. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Grand Lake | New York | |
|---|---|---|
| Average temperature | 32°C | 27°C |
| Max. temperature | 34°C | 31°C |
| Min. temperature | 21°C | -5°C |
| Total precipitation | 170 mm | 57 mm |
| Rainy days | 18 days | 9 days |
Start of September
The month of September starts in Grand Lake with hot temps, averaging around 33°C during the day and nights around 25°C.
Mid September
By mid-September, daytime temps drop to around 32°C, with nights around 24°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of September
By the end of September, the average daytime temperature in Grand Lake is around 31°C, while nighttime temps are about 22°C. There’s a significant chance of many days with precipitation.
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UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
The hurricane season in Grand Lake runs from June to November.
Check out the climate of Grand Lake for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Grand Lake, Louisiana. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Grand Lake
Temperature in September in Grand Lake over the years
Precipitation charts
These charts show the average amount of precipitation in September in Grand Lake, Louisiana. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Grand Lake
Total precipitation in September in Grand Lake over the years
Daily UV index in September in Grand Lake
This chart shows the average daily UV index in September in Grand Lake, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Grand Lake
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Average weather in Grand Lake by month
Click on a month below to see detailed weather info for Grand Lake. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.