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September Weather in Battle Ground, United States

Last updated: June 24, 2025

In Battle Ground, United States, the average temperature in September is a pleasant 21°C (70°F). Expect variations with a minimum of 5°C (42°F) and a maximum of 34°C (93°F). During this month, precipitation amounts to approximately 60 mm (2.4 in) over about 8 days, contributing to an average humidity level of 78%. Stay prepared for the comfortable yet humid conditions!

September Temperature in Battle Ground

In September in Battle Ground, the average temperature is 21°C (70°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 5°C (42°F). This range makes Battle Ground a perfect destination for travelers seeking both warm days and cooler evenings.

September Weather in Battle Ground: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Battle Ground, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Battle Ground, September typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec293142516474777470574135
Data source: Temperature data for Battle Ground 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 Battle Ground

In Battle Ground in September, the total precipitation amount is 60 mm (2.4 in) spread over the course of 8 days.

September Precipitation Trends in Battle Ground

The chart displays monthly precipitation patterns in Battle Ground, 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 Battle Ground, September typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec747710393148908993601067462
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Battle Ground

In Battle Ground in September, humidity is 78%. With an average temperature of 21°C (70°F), this humidity feels like a warm, enveloping blanket that can leave travelers feeling sticky and slightly fatigued, making it important to stay hydrated and take frequent breaks from outdoor activities.

September Average Humidity in Battle Ground

This chart illustrates the average monthly humidity levels in Battle Ground, 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 Battle Ground is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%86%87%81%82%81%79%78%81%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Battle Ground

In Battle Ground 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 Battle Ground.

Maximum UV Index Levels in Battle Ground for September

The chart shows the monthly maximum UV Index (UVI) for Battle Ground 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 Battle Ground typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Battle Ground 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 Battle Ground Compares to Other Months

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

This table compares monthly weather conditions in Battle Ground, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)74 mm (2.9 inches)85%moderate
February Weather0°C (31°F)77 mm (3.0 inches)85%moderate
March Weather5°C (42°F)103 mm (4.0 inches)86%high
April Weather11°C (52°F)93 mm (3.7 inches)87%very high
May Weather18°C (64°F)148 mm (5.8 inches)81%very high
June Weather23°C (74°F)90 mm (3.6 inches)82%very high
July Weather25°C (77°F)89 mm (3.5 inches)81%very high
August Weather23°C (74°F)93 mm (3.7 inches)79%very high
September Weather21°C (70°F)60 mm (2.4 inches)78%very high
October Weather14°C (58°F)106 mm (4.2 inches)81%high
November Weather5°C (42°F)74 mm (2.9 inches)89%moderate
December Weather2°C (36°F)62 mm (2.4 inches)86%low

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