September Weather in Las Lomas, United States

Last updated: June 24, 2025

In September, the average temperature in Las Lomas, United States hovers around 29°C (85°F), offering a warm and inviting climate. However, be prepared for a range where temperatures can dip to a cool 18°C (65°F) and soar up to a scorching 42°C (107°F). Rainfall is relatively moderate, with 95 mm (3.8 in) expected over 8 days, while the average humidity lingers around a comfortable 73%.

September Temperature in Las Lomas

In September in Las Lomas, the average temperature is 29°C (85°F). The maximum can reach 42°C (107°F), and the minimum can be as low as 18°C (65°F). Travelers should be prepared for warm days and cooler evenings, making it ideal for exploring both outdoor activities and night adventures.

September Weather in Las Lomas: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Las Lomas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Las Lomas, September typically has an average temperature of 29°C (85°F), with highs reaching up to 42°C (107°F) and lows dropping to around 18°C (65°F).

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

September Precipitation in Las Lomas

In Las Lomas in September, the precipitation amount is 95 mm (3.8 in) accumulated over 8 days.

September Precipitation Trends in Las Lomas

The chart displays monthly precipitation patterns in Las Lomas, 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 Las Lomas, September typically receives around 95 mm (3.8 inches) of precipitation spread over approximately 8 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 Las Lomas

In Las Lomas in September, humidity is 73%. With an average temperature of 29°C (85°F), this humidity feels like a warm blanket enveloping you, making outdoor activities quite uncomfortable and sticky for traveling.

September Average Humidity in Las Lomas

This chart illustrates the average monthly humidity levels in Las Lomas, 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 Las Lomas is approximately 73%, 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 Las Lomas

In Las Lomas in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Las Lomas.

Maximum UV Index Levels in Las Lomas for September

The chart shows the monthly maximum UV Index (UVI) for Las Lomas 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 Las Lomas typically reaches 11, which falls under the extreme exposure category.

Data source: Las Lomas 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 Las Lomas Compares to Other Months

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

This table compares monthly weather conditions in Las Lomas, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (62°F)	17 mm (0.7 inches)	83%	high
February Weather	19°C (66°F)	18 mm (0.7 inches)	79%	very high
March Weather	23°C (73°F)	26 mm (1.0 inches)	76%	very high
April Weather	26°C (79°F)	32 mm (1.3 inches)	77%	extreme
May Weather	29°C (84°F)	85 mm (3.4 inches)	80%	extreme
June Weather	30°C (87°F)	66 mm (2.6 inches)	73%	extreme
July Weather	31°C (88°F)	76 mm (3.0 inches)	66%	extreme
August Weather	32°C (89°F)	10 mm (0.4 inches)	65%	extreme
September Weather	29°C (85°F)	95 mm (3.8 inches)	73%	extreme
October Weather	25°C (78°F)	34 mm (1.4 inches)	76%	very high
November Weather	21°C (70°F)	31 mm (1.2 inches)	80%	high
December Weather	18°C (65°F)	19 mm (0.7 inches)	86%	high