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September Weather in Republic, United States

Last updated: June 24, 2025

In September, the average temperature in Republic, United States hovers around 14°C (57°F). However, prepare for a range, as temperatures can dip to a chilly -3°C (26°F) or soar to a hot 33°C (91°F). Expect 111 mm (4.4 in) of rain spread over 12 days, contributing to an average humidity of 74%. Embrace the variety that September brings!

September Temperature in Republic

In September in Republic, the average temperature is 14°C (57°F). Maximum temperatures can reach 33°C (91°F), while minimums can drop as low as -3°C (26°F). Overall, it's essential to pack layers to accommodate the wide temperature range during your travels.

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

The chart illustrates September temperature patterns in Republic, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Republic, September typically has an average temperature of 14°C (57°F), with highs reaching up to 33°C (91°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec151425355263686457432820
Data source: Temperature data for Republic 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 Republic

In Republic, in September, the precipitation amount is 111 mm (4.4 in) over a span of 12 days.

September Precipitation Trends in Republic

The chart displays monthly precipitation patterns in Republic, 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 Republic, September typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec4159569484118991251111256564
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Republic

In Republic in September, humidity is 74%. With an average temperature of 14°C (57°F), this humidity feels like a warm, damp blanket wrapping around you, making it slightly uncomfortable for traveling, as you may find yourself quickly sweating and in need of frequent breaks to cool down.

September Average Humidity in Republic

This chart illustrates the average monthly humidity levels in Republic, 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 Republic is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%92%88%86%78%74%70%71%74%81%86%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Republic

In Republic in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Republic.

Maximum UV Index Levels in Republic for September

The chart shows the monthly maximum UV Index (UVI) for Republic 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 Republic typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245799987532
Data source: Republic 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 Republic Compares to Other Months

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

This table compares monthly weather conditions in Republic, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)41 mm (1.6 inches)92%low
February Weather-10°C (14°F)59 mm (2.3 inches)92%moderate
March Weather-4°C (25°F)56 mm (2.2 inches)88%moderate
April Weather2°C (36°F)94 mm (3.7 inches)86%high
May Weather11°C (52°F)84 mm (3.3 inches)78%very high
June Weather17°C (64°F)118 mm (4.6 inches)74%very high
July Weather20°C (68°F)99 mm (3.9 inches)70%very high
August Weather18°C (64°F)125 mm (4.9 inches)71%very high
September Weather14°C (57°F)111 mm (4.4 inches)74%high
October Weather6°C (43°F)124 mm (4.9 inches)81%moderate
November Weather-2°C (28°F)65 mm (2.6 inches)86%moderate
December Weather-7°C (20°F)64 mm (2.5 inches)90%low

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