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September Weather in Lander, United States

Last updated: June 24, 2025

In September, the average temperature in Lander, United States is a mild 13°C (56°F). Expect a variety of weather conditions, with minimum temperatures dropping to -9°C (15°F) and soaring up to a maximum of 32°C (90°F). During this month, the area receives around 44 mm (1.7 in) of precipitation over approximately 6 days, accompanied by an average humidity level of 59%. Prepare accordingly for a blend of cool and warm days!

September Temperature in Lander

In September in Lander, the average temperature is 13°C (56°F). The maximum can reach up to 32°C (90°F), while the minimum can drop as low as -9°C (15°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm and cold weather.

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

The chart illustrates September temperature patterns in Lander, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lander, September typically has an average temperature of 13°C (56°F), with highs reaching up to 32°C (90°F) and lows dropping to around -9°C (15°F).
JanFebMarAprMayJunJulAugSepOctNovDec222131364659666456393223
Data source: Temperature data for Lander 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 Lander

In Lander in September, the total precipitation amount is 44 mm (1.7 in) spread over 6 days.

September Precipitation Trends in Lander

The chart displays monthly precipitation patterns in Lander, 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 Lander, September typically receives around 44 mm (1.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec2438538511153434444482925
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lander

In Lander in September humidity is 59%. With an average temperature of 13°C (56°F), this humidity feels like a refreshing chill in the air, making it comfortable for traveling and exploring, but be prepared for a slight dampness that adds a crispness to the atmosphere.

September Average Humidity in Lander

This chart illustrates the average monthly humidity levels in Lander, 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 Lander is approximately 59%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%82%72%69%67%65%59%59%69%83%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lander

In Lander 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 Lander.

Maximum UV Index Levels in Lander for September

The chart shows the monthly maximum UV Index (UVI) for Lander 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 Lander typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35710101212119643
Data source: Lander 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 Lander Compares to Other Months

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

This table compares monthly weather conditions in Lander, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)24 mm (0.9 inches)90%moderate
February Weather-6°C (22°F)38 mm (1.5 inches)89%moderate
March Weather0°C (32°F)53 mm (2.1 inches)82%high
April Weather2°C (36°F)85 mm (3.4 inches)72%very high
May Weather8°C (46°F)111 mm (4.4 inches)69%very high
June Weather15°C (59°F)53 mm (2.1 inches)67%extreme
July Weather19°C (67°F)43 mm (1.7 inches)65%extreme
August Weather18°C (64°F)44 mm (1.7 inches)59%extreme
September Weather13°C (56°F)44 mm (1.7 inches)59%very high
October Weather4°C (39°F)48 mm (1.9 inches)69%high
November Weather0°C (32°F)29 mm (1.1 inches)83%moderate
December Weather-5°C (23°F)25 mm (1.0 inches)89%moderate

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