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September Weather in Longtown, United States

Last updated: June 24, 2025

In September, the average temperature in Longtown, United States hovers around 25°C (77°F), offering a pleasant climate. However, be prepared for temperature fluctuations, as it can dip to a minimum of 11°C (52°F) and soar to a maximum of 37°C (99°F). Expect 94 mm (3.7 in) of precipitation over 6 days, accompanied by an average humidity level of 64%, making it a season of refreshing showers and comfortable warmth.

September Temperature in Longtown

In September in Longtown, the average temperature is 25°C (77°F). Maximums can reach 37°C (99°F), and minimums can be as low as 11°C (52°F). This weather makes Longtown an ideal destination for travelers seeking warm and pleasant conditions.

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

The chart illustrates September temperature patterns in Longtown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Longtown, September typically has an average temperature of 25°C (77°F), with highs reaching up to 37°C (99°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec414355617179838177645247
Data source: Temperature data for Longtown 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 Longtown

In Longtown in September, the precipitation amount is 94 mm (3.7 in) over the course of 6 days.

September Precipitation Trends in Longtown

The chart displays monthly precipitation patterns in Longtown, 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 Longtown, September typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec7994104128188687390941305671
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Longtown

In Longtown in September, humidity is 64%. With an average temperature of 25°C (77°F), this humidity feels like a warm embrace, making outdoor excursions feel a bit heavier, yet still inviting for travelers seeking a vibrant atmosphere.

September Average Humidity in Longtown

This chart illustrates the average monthly humidity levels in Longtown, 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 Longtown is approximately 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%78%75%75%83%82%78%68%64%71%82%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Longtown

In Longtown 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 Longtown.

Maximum UV Index Levels in Longtown for September

The chart shows the monthly maximum UV Index (UVI) for Longtown 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 Longtown typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46710101111119754
Data source: Longtown 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 Longtown Compares to Other Months

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

This table compares monthly weather conditions in Longtown, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)79 mm (3.1 inches)79%moderate
February Weather6°C (44°F)94 mm (3.7 inches)78%high
March Weather13°C (55°F)104 mm (4.1 inches)75%high
April Weather16°C (61°F)128 mm (5.0 inches)75%very high
May Weather21°C (71°F)188 mm (7.4 inches)83%very high
June Weather26°C (80°F)68 mm (2.7 inches)81%extreme
July Weather28°C (83°F)73 mm (2.9 inches)78%extreme
August Weather27°C (82°F)90 mm (3.5 inches)68%extreme
September Weather25°C (77°F)94 mm (3.7 inches)64%very high
October Weather18°C (64°F)130 mm (5.1 inches)71%high
November Weather11°C (52°F)55 mm (2.2 inches)82%moderate
December Weather8°C (47°F)71 mm (2.8 inches)87%moderate

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