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September Weather in Langley, United States

Last updated: June 24, 2025

In September, the average temperature in Langley, United States is a pleasant 24°C (75°F). However, be prepared for a range, as temperatures can dip to a chilly 9°C (48°F) or soar up to a warm 35°C (95°F). Expect some rain too, with an average precipitation of 83 mm (3.3 in) spread over 6 days. The humidity is relatively moderate at 67%, ensuring a comfortable atmosphere throughout the month.

September Temperature in Langley

In September in Langley, the average temperature is 24°C (75°F), with maximums reaching 35°C (95°F) and minimums dropping to 9°C (48°F). This diverse temperature range makes it advisable for travelers to pack both light clothing for the warm days and warmer layers for the cooler evenings.

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

The chart illustrates September temperature patterns in Langley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Langley, 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 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec384052586878817975614944
Data source: Temperature data for Langley 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 Langley

In Langley in September, the precipitation amount is 83 mm (3.3 in) over the course of 6 days.

September Precipitation Trends in Langley

The chart displays monthly precipitation patterns in Langley, 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 Langley, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec817813316218696108121831366257
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Langley

In Langley in September humidity is 67%. With an average temperature of 24°C (75°F), this humidity feels like a warm and sticky embrace, making traveling a bit uncomfortable as you find yourself seeking shade and refreshing drinks more often.

September Average Humidity in Langley

This chart illustrates the average monthly humidity levels in Langley, 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 Langley is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%76%71%74%83%83%81%73%67%72%82%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Langley

In Langley 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 Langley.

Maximum UV Index Levels in Langley for September

The chart shows the monthly maximum UV Index (UVI) for Langley 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 Langley typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Langley 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 Langley Compares to Other Months

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

This table compares monthly weather conditions in Langley, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)81 mm (3.2 inches)77%moderate
February Weather5°C (41°F)78 mm (3.1 inches)76%high
March Weather11°C (53°F)133 mm (5.2 inches)71%high
April Weather15°C (58°F)161 mm (6.4 inches)73%very high
May Weather20°C (69°F)186 mm (7.3 inches)83%very high
June Weather26°C (78°F)96 mm (3.8 inches)83%extreme
July Weather27°C (81°F)108 mm (4.2 inches)81%extreme
August Weather26°C (79°F)121 mm (4.8 inches)73%very high
September Weather24°C (75°F)83 mm (3.3 inches)67%very high
October Weather16°C (61°F)136 mm (5.4 inches)72%high
November Weather9°C (49°F)62 mm (2.4 inches)82%moderate
December Weather7°C (44°F)57 mm (2.3 inches)85%moderate

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