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September Weather in Harrison, United States

Last updated: June 24, 2025

In Harrison, United States, the average temperature in September hovers around 17°C (64°F). During this time, temperatures can range widely, with minimums plummeting to -5°C (24°F) and maximums soaring to 38°C (101°F). Expect 35 mm (1.4 in) of precipitation spread over 5 days, accompanied by an average humidity level of 76%. Embrace the variability and prepare for a month filled with diverse weather!

September Temperature in Harrison

In September in Harrison, the average temperature is 17°C (64°F). Maximum temperatures can reach 38°C (101°F), while the minimum can drop as low as -5°C (24°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates September temperature patterns in Harrison, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harrison, September typically has an average temperature of 17°C (64°F), with highs reaching up to 38°C (101°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec292537445468747163453831
Data source: Temperature data for Harrison 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 Harrison

In Harrison in September, the precipitation amount is 35 mm (1.4 in) over a span of 5 days.

September Precipitation Trends in Harrison

The chart displays monthly precipitation patterns in Harrison, 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 Harrison, September typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec162857579157433535462226
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Harrison

In Harrison in September, humidity is 76%. With an average temperature of 17°C (64°F), this humidity feels like a warm, sticky embrace that can make outdoor activities feel sluggish and draining, challenging travelers to stay hydrated and seek respite in shaded areas or air-conditioned spaces.

September Average Humidity in Harrison

This chart illustrates the average monthly humidity levels in Harrison, 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 Harrison is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%78%64%66%74%84%85%85%76%71%73%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Harrison

In Harrison 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 Harrison.

Maximum UV Index Levels in Harrison for September

The chart shows the monthly maximum UV Index (UVI) for Harrison 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 Harrison typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35610101111108643
Data source: Harrison 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 Harrison Compares to Other Months

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

This table compares monthly weather conditions in Harrison, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)16 mm (0.6 inches)73%moderate
February Weather-4°C (26°F)28 mm (1.1 inches)78%moderate
March Weather3°C (38°F)57 mm (2.2 inches)64%high
April Weather6°C (44°F)57 mm (2.3 inches)66%very high
May Weather12°C (54°F)91 mm (3.6 inches)74%very high
June Weather20°C (68°F)57 mm (2.2 inches)84%extreme
July Weather23°C (74°F)43 mm (1.7 inches)85%extreme
August Weather22°C (71°F)35 mm (1.4 inches)85%very high
September Weather17°C (64°F)35 mm (1.4 inches)76%very high
October Weather7°C (46°F)45 mm (1.8 inches)71%high
November Weather4°C (39°F)22 mm (0.9 inches)73%moderate
December Weather0°C (31°F)26 mm (1.0 inches)75%moderate

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