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September Weather in Lake Crystal, United States

Last updated: June 24, 2025

In September, the average temperature in Lake Crystal, United States is a comfortable 18°C (65°F), with fluctuations ranging from a brisk 2°C (37°F) to a warm 33°C (92°F). Expect approximately 136 mm (5.4 in) of precipitation spread over 10 days, and enjoy the season with an average humidity level of 75%.

September Temperature in Lake Crystal

In September in Lake Crystal, the average temperature is 18°C (65°F). The maximum can reach 33°C (92°F), while the minimum can be as low as 2°C (37°F). This makes Lake Crystal an ideal destination for travelers seeking a mix of warm days and cooler evenings, perfect for exploring outdoor activities.

September Weather in Lake Crystal: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Lake Crystal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lake Crystal, September typically has an average temperature of 18°C (65°F), with highs reaching up to 33°C (92°F) and lows dropping to around 2°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec171634446072747165493525
Data source: Temperature data for Lake Crystal 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 Lake Crystal

In Lake Crystal in September, the total precipitation amount is 136 mm (5.4 in) over a span of 10 days.

September Precipitation Trends in Lake Crystal

The chart displays monthly precipitation patterns in Lake Crystal, 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 Lake Crystal, September typically receives around 136 mm (5.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec34366993136114121114136943343
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lake Crystal

In Lake Crystal in September, humidity is 75%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket that can make outdoor exploration feel a bit stifling, potentially leading to discomfort during travel activities.

September Average Humidity in Lake Crystal

This chart illustrates the average monthly humidity levels in Lake Crystal, 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 Lake Crystal is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%80%81%74%81%80%77%75%80%87%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lake Crystal

In Lake Crystal in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Lake Crystal.

Maximum UV Index Levels in Lake Crystal for September

The chart shows the monthly maximum UV Index (UVI) for Lake Crystal 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 Lake Crystal typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35589101098532
Data source: Lake Crystal 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 Lake Crystal Compares to Other Months

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

This table compares monthly weather conditions in Lake Crystal, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)34 mm (1.3 inches)82%moderate
February Weather-9°C (17°F)36 mm (1.4 inches)84%moderate
March Weather1°C (34°F)69 mm (2.7 inches)80%moderate
April Weather7°C (45°F)92 mm (3.6 inches)81%very high
May Weather16°C (60°F)136 mm (5.4 inches)74%very high
June Weather22°C (73°F)114 mm (4.5 inches)80%very high
July Weather24°C (75°F)121 mm (4.8 inches)80%very high
August Weather22°C (71°F)114 mm (4.5 inches)77%very high
September Weather18°C (65°F)136 mm (5.4 inches)75%very high
October Weather9°C (49°F)94 mm (3.7 inches)80%moderate
November Weather1°C (35°F)33 mm (1.3 inches)87%moderate
December Weather-4°C (25°F)43 mm (1.7 inches)83%low

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