September Weather in Hammond, United States

Last updated: June 24, 2025

In Hammond, United States, the average temperature in September hovers around 26°C (79°F), providing a warm atmosphere for exploration. However, prepare for variations, as temperatures can dip to a cool 12°C (54°F) or soar to a sizzling 36°C (98°F). During this month, expect about 144 mm (5.7 in) of precipitation spread over 13 days, contributing to an average humidity level of 79%. Ideal for those who appreciate a tropical ambiance!

September Temperature in Hammond

In September in Hammond, the average temperature is 26°C (79°F), with maximums reaching 36°C (98°F) and minimums dipping as low as 12°C (54°F). This range makes it a perfect time for travelers to enjoy both warm days and cool evenings while exploring all that Hammond has to offer.

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

The chart illustrates September temperature patterns in Hammond, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hammond, September typically has an average temperature of 26°C (79°F), with highs reaching up to 36°C (98°F) and lows dropping to around 12°C (54°F).

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

September Precipitation in Hammond

In Hammond in September, the precipitation amount is 144 mm (5.7 in) spread over 13 days.

September Precipitation Trends in Hammond

The chart displays monthly precipitation patterns in Hammond, 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 Hammond, September typically receives around 144 mm (5.7 inches) of precipitation spread over approximately 13 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 Hammond

In Hammond in September humidity is 79%. With an average temperature of 26°C (79°F), this humidity feels like a warm, sticky embrace that can make outdoor activities feel exhausting. Travelers should be prepared for a heavy air that clings to the skin, making hydration essential while navigating the sights and sounds of the city.

September Average Humidity in Hammond

This chart illustrates the average monthly humidity levels in Hammond, 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 Hammond is approximately 79%, 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 Hammond

In Hammond 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 Hammond.

Maximum UV Index Levels in Hammond for September

The chart shows the monthly maximum UV Index (UVI) for Hammond 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 Hammond typically reaches 10, which falls under the very high exposure category.

Data source: Hammond 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 Hammond Compares to Other Months

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

This table compares monthly weather conditions in Hammond, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (53°F)	115 mm (4.5 inches)	83%	moderate
February Weather	15°C (58°F)	126 mm (5.0 inches)	83%	very high
March Weather	18°C (64°F)	88 mm (3.5 inches)	80%	very high
April Weather	20°C (68°F)	147 mm (5.8 inches)	81%	extreme
May Weather	24°C (76°F)	151 mm (6.0 inches)	81%	extreme
June Weather	27°C (80°F)	201 mm (7.9 inches)	78%	extreme
July Weather	27°C (82°F)	204 mm (8.0 inches)	79%	extreme
August Weather	27°C (81°F)	242 mm (9.5 inches)	79%	extreme
September Weather	26°C (79°F)	144 mm (5.7 inches)	79%	very high
October Weather	22°C (72°F)	119 mm (4.7 inches)	77%	very high
November Weather	15°C (59°F)	78 mm (3.1 inches)	85%	high
December Weather	13°C (56°F)	128 mm (5.0 inches)	88%	moderate