September Weather in Hawai, India

Last updated: August 23, 2025

In Hawai, India, the month of September brings an average temperature of 17°C (63°F), with pleasant highs reaching up to 24°C (75°F) and cooler lows dipping to 8°C (46°F). Expect a fair amount of rain, with 306 mm (12.0 in) of precipitation spread over 26 days. The air tends to be quite humid, boasting an average humidity level of 91%.

September Temperature in Hawai

In September in Hawai, the average temperature is 17°C (63°F). Maximums can reach 24°C (75°F) and minimums can be as low as 8°C (46°F). It's a great time for travelers to enjoy mild weather while exploring the beauty of Hawai.

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

The chart illustrates September temperature patterns in Hawai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hawai, September typically has an average temperature of 17°C (63°F), with highs reaching up to 24°C (75°F) and lows dropping to around 8°C (46°F).

Data source: Temperature data for Hawai generated using information from the Copernicus Climate Change Service.

September Precipitation in Hawai

In Hawai in September, the precipitation amount is 306 mm (12.0 in) occurring over 26 days.

September Precipitation Trends in Hawai

The chart displays monthly precipitation patterns in Hawai, 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 Hawai, September typically receives around 306 mm (12.0 inches) of precipitation spread over approximately 26 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Hawai

In Hawai in September humidity is 91%. With an average temperature of 17°C (63°F), this humidity feels like a heavy blanket wrapping around you, making travel feel somewhat stifling and requiring frequent breaks to seek refreshment in cooler, shaded areas.

September Average Humidity in Hawai

This chart illustrates the average monthly humidity levels in Hawai, 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 Hawai is approximately 91%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hawai

In Hawai in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Hawai.

Maximum UV Index Levels in Hawai for September

The chart shows the monthly maximum UV Index (UVI) for Hawai 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 Hawai typically reaches 13, which falls under the extreme exposure category.

Data source: Hawai 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 Hawai Compares to Other Months

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

This table compares monthly weather conditions in Hawai, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	50 mm (2.0 inches)	78%	high
February Weather	5°C (42°F)	99 mm (3.9 inches)	75%	very high
March Weather	8°C (47°F)	123 mm (4.8 inches)	53%	extreme
April Weather	11°C (52°F)	128 mm (5.0 inches)	53%	extreme
May Weather	14°C (58°F)	259 mm (10.2 inches)	83%	extreme
June Weather	17°C (63°F)	387 mm (15.2 inches)	91%	extreme
July Weather	18°C (64°F)	643 mm (25.3 inches)	93%	extreme
August Weather	18°C (65°F)	603 mm (23.7 inches)	92%	extreme
September Weather	17°C (63°F)	306 mm (12.0 inches)	91%	extreme
October Weather	14°C (58°F)	106 mm (4.2 inches)	89%	extreme
November Weather	9°C (49°F)	39 mm (1.5 inches)	89%	very high
December Weather	6°C (43°F)	38 mm (1.5 inches)	85%	high