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September Weather in Upper Grand Lagoon, United States

Last updated: June 24, 2025

In September, the average temperature in Upper Grand Lagoon, United States is a warm 27°C (80°F), with minimums dipping to 17°C (63°F) and maximums soaring to 34°C (93°F). Expect around 179 mm (7.0 in) of precipitation over 15 days, accompanied by a high average humidity of 79%. Stay prepared for both heat and occasional rain!

September Temperature in Upper Grand Lagoon

In September in Upper Grand Lagoon, the average temperature is 27°C (80°F). Maximum can reach 34°C (93°F) and minimum can be as low as 17°C (63°F). This mild climate makes Upper Grand Lagoon an ideal destination for travelers looking to enjoy pleasant weather.

September Weather in Upper Grand Lagoon: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Upper Grand Lagoon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Upper Grand Lagoon, September typically has an average temperature of 27°C (80°F), with highs reaching up to 34°C (93°F) and lows dropping to around 17°C (63°F).
JanFebMarAprMayJunJulAugSepOctNovDec556064687580828280756358
Data source: Temperature data for Upper Grand Lagoon generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Upper Grand Lagoon

In Upper Grand Lagoon in September, the total precipitation amount is 179 mm (7.0 in), occurring over the course of 15 days.

September Precipitation Trends in Upper Grand Lagoon

The chart displays monthly precipitation patterns in Upper Grand Lagoon, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Upper Grand Lagoon, September typically receives around 179 mm (7.0 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec93128581239517415620417910547144
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Upper Grand Lagoon

In Upper Grand Lagoon in September humidity is 79%. With an average temperature of 27°C (80°F), this humidity feels like walking through a warm, dense blanket, making travel feel sluggish and allowing every step to become noticeably heavier.

September Average Humidity in Upper Grand Lagoon

This chart illustrates the average monthly humidity levels in Upper Grand Lagoon, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Upper Grand Lagoon is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%82%79%77%74%70%78%78%79%74%83%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Upper Grand Lagoon

In Upper Grand Lagoon in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Upper Grand Lagoon.

Maximum UV Index Levels in Upper Grand Lagoon for September

The chart shows the monthly maximum UV Index (UVI) for Upper Grand Lagoon in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Upper Grand Lagoon typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589101111121110864
Data source: Upper Grand Lagoon September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Upper Grand Lagoon Compares to Other Months

Weather in Upper Grand Lagoon varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Upper Grand Lagoon, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Upper Grand Lagoon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (56°F)93 mm (3.7 inches)83%moderate
February Weather16°C (61°F)128 mm (5.0 inches)82%very high
March Weather18°C (64°F)58 mm (2.3 inches)79%very high
April Weather20°C (68°F)123 mm (4.8 inches)77%very high
May Weather24°C (75°F)95 mm (3.7 inches)74%extreme
June Weather27°C (81°F)174 mm (6.9 inches)70%extreme
July Weather28°C (82°F)156 mm (6.2 inches)78%extreme
August Weather28°C (82°F)204 mm (8.0 inches)78%extreme
September Weather27°C (80°F)179 mm (7.0 inches)79%very high
October Weather24°C (75°F)105 mm (4.1 inches)74%very high
November Weather17°C (63°F)47 mm (1.9 inches)83%high
December Weather15°C (59°F)143 mm (5.6 inches)86%moderate

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