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September Weather in Rupert, United States

Last updated: June 24, 2025

In Rupert, United States, the average temperature in September is a comfortable 18°C (65°F). Expect minimums as low as 3°C (38°F) and maximums reaching 31°C (88°F). During this month, you'll likely encounter about 103 mm (4.0 in) of precipitation spread over 11 days, contributing to an average humidity level of 68%. This blend of warmth and moisture creates a lush atmosphere perfect for exploration!

September Temperature in Rupert

In September in Rupert, the average temperature is 18°C (65°F). The maximum can reach 31°C (88°F) and the minimum can be as low as 3°C (38°F). Be sure to pack both light clothing for warm days and warmer layers for cool evenings while traveling.

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

The chart illustrates September temperature patterns in Rupert, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rupert, September typically has an average temperature of 18°C (65°F), with highs reaching up to 31°C (88°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec323742516167716965554137
Data source: Temperature data for Rupert 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 Rupert

In Rupert in September, the total precipitation amount is 103 mm (4.0 in), occurring over the course of 11 days.

September Precipitation Trends in Rupert

The chart displays monthly precipitation patterns in Rupert, 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 Rupert, September typically receives around 103 mm (4.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec10016512414616312510611110312681120
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Rupert

In Rupert in September, humidity is 68%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket, making travel somewhat sticky and requiring occasional breaks for refreshing hydration.

September Average Humidity in Rupert

This chart illustrates the average monthly humidity levels in Rupert, 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 Rupert is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%84%83%83%79%66%68%78%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rupert

In Rupert 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 Rupert.

Maximum UV Index Levels in Rupert for September

The chart shows the monthly maximum UV Index (UVI) for Rupert 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 Rupert typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109753
Data source: Rupert 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 Rupert Compares to Other Months

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

This table compares monthly weather conditions in Rupert, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)100 mm (3.9 inches)87%moderate
February Weather3°C (38°F)165 mm (6.5 inches)87%high
March Weather6°C (43°F)124 mm (4.9 inches)86%very high
April Weather11°C (51°F)146 mm (5.8 inches)84%very high
May Weather16°C (61°F)163 mm (6.4 inches)83%extreme
June Weather19°C (67°F)125 mm (4.9 inches)83%extreme
July Weather22°C (71°F)106 mm (4.2 inches)79%extreme
August Weather21°C (69°F)111 mm (4.4 inches)66%very high
September Weather18°C (65°F)103 mm (4.0 inches)68%very high
October Weather13°C (56°F)126 mm (5.0 inches)78%high
November Weather5°C (41°F)81 mm (3.2 inches)89%moderate
December Weather3°C (37°F)120 mm (4.7 inches)86%moderate

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