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September Weather in Northlake, United States

Last updated: June 24, 2025

In September, the average temperature in Northlake, United States hovers around 24°C (75°F), with a pleasant range that can dip to a cool 10°C (50°F) at night and peak at a warm 35°C (95°F) during the day. Expect about 123 mm (4.9 in) of precipitation over 9 days, contributing to an average humidity of 76%—perfect for those who enjoy a lush, tropical feel!

September Temperature in Northlake

In September in Northlake, the average temperature is 24°C (75°F). Maximums can reach 35°C (95°F) and minimums can be as low as 10°C (50°F). This makes Northlake an ideal destination for travelers seeking warm weather along with the possibility of cooler evenings.

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

The chart illustrates September temperature patterns in Northlake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Northlake, September typically has an average temperature of 24°C (75°F), with highs reaching up to 35°C (95°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec455055627177807975665248
Data source: Temperature data for Northlake 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 Northlake

In Northlake in September, the precipitation amount is 123 mm (4.9 in) over a period of 9 days.

September Precipitation Trends in Northlake

The chart displays monthly precipitation patterns in Northlake, 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 Northlake, September typically receives around 123 mm (4.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec1081451111231401039812512313294132
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Northlake

In Northlake in September, humidity is 76%. With an average temperature of 24°C (75°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities feel a bit sluggish and urging you to seek shade and hydration.

September Average Humidity in Northlake

This chart illustrates the average monthly humidity levels in Northlake, 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 Northlake is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Northlake

In Northlake 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 Northlake.

Maximum UV Index Levels in Northlake for September

The chart shows the monthly maximum UV Index (UVI) for Northlake 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 Northlake typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111109864
Data source: Northlake 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 Northlake Compares to Other Months

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

This table compares monthly weather conditions in Northlake, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)108 mm (4.2 inches)86%moderate
February Weather10°C (50°F)145 mm (5.7 inches)86%high
March Weather13°C (55°F)111 mm (4.4 inches)86%very high
April Weather17°C (62°F)123 mm (4.9 inches)82%very high
May Weather21°C (71°F)140 mm (5.5 inches)85%extreme
June Weather25°C (77°F)102 mm (4.0 inches)85%extreme
July Weather27°C (80°F)98 mm (3.9 inches)83%extreme
August Weather26°C (79°F)125 mm (4.9 inches)76%very high
September Weather24°C (75°F)123 mm (4.9 inches)76%very high
October Weather19°C (66°F)132 mm (5.2 inches)80%very high
November Weather11°C (52°F)94 mm (3.7 inches)88%high
December Weather9°C (48°F)131 mm (5.2 inches)88%moderate

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