September Weather in Hamilton City, United States

Last updated: June 24, 2025

In Hamilton City, United States, the average temperature in September reaches a pleasant 26°C (78°F). However, temperatures can vary widely, dipping to a cool 8°C (47°F) and soaring to a scorching 45°C (113°F). During this time, you can expect minimal precipitation, averaging just 2 mm (0.1 in) over 0 days. The average humidity stands at a comfortable 44%, making it an ideal month for outdoor activities!

September Temperature in Hamilton City

In September in Hamilton City, the average temperature is 26°C (78°F), with maximums reaching 45°C (113°F) and minimums dropping as low as 8°C (47°F). Be prepared for a wide range of temperatures when traveling to Hamilton City during this time.

September Weather in Hamilton City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Hamilton City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hamilton City, September typically has an average temperature of 26°C (78°F), with highs reaching up to 45°C (113°F) and lows dropping to around 8°C (47°F).

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

September Precipitation in Hamilton City

In Hamilton City in September, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

September Precipitation Trends in Hamilton City

The chart displays monthly precipitation patterns in Hamilton City, 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 Hamilton City, September typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Hamilton City

In Hamilton City in September humidity is 44%. With an average temperature of 26°C (78°F), this humidity feels like a refreshing embrace, providing a comfortable atmosphere for exploring the sights and enjoying outdoor activities without feeling too sticky or overwhelming.

September Average Humidity in Hamilton City

This chart illustrates the average monthly humidity levels in Hamilton City, 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 Hamilton City is approximately 44%, 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 Hamilton City

In Hamilton City in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Hamilton City.

Maximum UV Index Levels in Hamilton City for September

The chart shows the monthly maximum UV Index (UVI) for Hamilton City 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 Hamilton City typically reaches 9, which falls under the very high exposure category.

Data source: Hamilton City 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 Hamilton City Compares to Other Months

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

This table compares monthly weather conditions in Hamilton City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	106 mm (4.2 inches)	84%	moderate
February Weather	12°C (53°F)	114 mm (4.5 inches)	84%	moderate
March Weather	14°C (57°F)	82 mm (3.2 inches)	83%	high
April Weather	18°C (65°F)	36 mm (1.4 inches)	81%	very high
May Weather	23°C (73°F)	31 mm (1.2 inches)	74%	very high
June Weather	28°C (83°F)	4 mm (0.1 inches)	64%	extreme
July Weather	31°C (89°F)	0 mm (0.0 inches)	44%	very high
August Weather	30°C (86°F)	1 mm (0.0 inches)	36%	very high
September Weather	26°C (78°F)	2 mm (0.1 inches)	44%	very high
October Weather	19°C (67°F)	29 mm (1.1 inches)	65%	high
November Weather	13°C (56°F)	51 mm (2.0 inches)	84%	moderate
December Weather	10°C (50°F)	81 mm (3.2 inches)	83%	moderate