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September Weather in Melville, United States

Last updated: June 24, 2025

In Melville, United States, the average temperature in September hovers around 26°C (80°F). You'll experience variability in temperatures, with minimums dipping to 12°C (55°F) and maximums soaring to 37°C (100°F). Expect around 115 mm (4.5 in) of precipitation over 12 days, and prepare for a notably high humidity level of 79%.

September Temperature in Melville

In September in Melville, the average temperature is 26°C (80°F). Maximum can reach 37°C (100°F), and the minimum can be as low as 12°C (55°F). This range makes Melville an ideal destination for travelers seeking warm weather, while also allowing for cooler evenings.

September Weather in Melville: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Melville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Melville, September typically has an average temperature of 26°C (80°F), with highs reaching up to 37°C (100°F) and lows dropping to around 12°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec525764687681828280725955
Data source: Temperature data for Melville 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 Melville

In Melville in September, the total precipitation amount is 115 mm (4.5 in) over a span of 12 days.

September Precipitation Trends in Melville

The chart displays monthly precipitation patterns in Melville, 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 Melville, September typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec1141108716717214916513111510977117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Melville

In Melville in September, humidity is 79%. With an average temperature of 26°C (80°F), this humidity feels like an enveloping warm blanket, making travel feel slightly sluggish and prompting frequent hydration breaks to stay comfortable while exploring the sights.

September Average Humidity in Melville

This chart illustrates the average monthly humidity levels in Melville, 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 Melville is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%83%80%81%81%78%79%79%79%77%85%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Melville

In Melville 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 Melville.

Maximum UV Index Levels in Melville for September

The chart shows the monthly maximum UV Index (UVI) for Melville 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 Melville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111112121110864
Data source: Melville 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 Melville Compares to Other Months

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

This table compares monthly weather conditions in Melville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)114 mm (4.5 inches)83%moderate
February Weather14°C (57°F)110 mm (4.3 inches)83%very high
March Weather18°C (64°F)87 mm (3.4 inches)80%very high
April Weather20°C (68°F)167 mm (6.6 inches)81%extreme
May Weather24°C (76°F)172 mm (6.8 inches)81%extreme
June Weather27°C (81°F)149 mm (5.8 inches)78%extreme
July Weather28°C (83°F)165 mm (6.5 inches)79%extreme
August Weather28°C (82°F)131 mm (5.1 inches)79%extreme
September Weather26°C (80°F)115 mm (4.5 inches)79%very high
October Weather22°C (72°F)109 mm (4.3 inches)77%very high
November Weather15°C (59°F)77 mm (3.0 inches)85%high
December Weather13°C (56°F)117 mm (4.6 inches)88%moderate

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