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October Weather in Forest Grove, United States

Last updated: June 24, 2025

The average temperature in Forest Grove, United States during October hovers around 11°C (53°F). Temperature fluctuations can be significant, with minimums dropping to -1°C (30°F) and maximums reaching 25°C (78°F). Expect 101 mm (4.0 in) of precipitation over approximately 10 days, contributing to an average humidity of 81%.

October Temperature in Forest Grove

In October in Forest Grove, the average temperature is 11°C (53°F). The maximum can reach 25°C (78°F) and the minimum can be as low as -1°C (30°F). It's a great time to travel if you enjoy mild weather and the possibility of experiencing a range of temperatures.

October Weather in Forest Grove: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Forest Grove, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Forest Grove, October typically has an average temperature of 11°C (53°F), with highs reaching up to 25°C (78°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec414145515763687063534641
Data source: Temperature data for Forest Grove 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.

October Precipitation in Forest Grove

In Forest Grove in October, the precipitation amount is 101 mm (4.0 in) spread over the course of 10 days.

October Precipitation Trends in Forest Grove

The chart displays monthly precipitation patterns in Forest Grove, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Forest Grove, October typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec17316613211555476666101163188
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Forest Grove

In Forest Grove in October, humidity is 81%. With an average temperature of 11°C (53°F), this humidity feels like a damp chill that can make outdoor activities uncomfortable, requiring layers for protection against the moisture in the air while exploring.

October Average Humidity in Forest Grove

This chart illustrates the average monthly humidity levels in Forest Grove, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Forest Grove is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%85%83%83%84%82%74%71%81%87%87%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Forest Grove

In Forest Grove in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Forest Grove.

Maximum UV Index Levels in Forest Grove for October

The chart shows the monthly maximum UV Index (UVI) for Forest Grove in October, 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 October, the maximum UV index in Forest Grove typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec23579101087532
Data source: Forest Grove October 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 October Weather in Forest Grove Compares to Other Months

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

This table compares monthly weather conditions in Forest Grove, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)173 mm (6.8 inches)85%low
February Weather5°C (41°F)166 mm (6.5 inches)84%moderate
March Weather7°C (46°F)132 mm (5.2 inches)85%moderate
April Weather10°C (51°F)115 mm (4.5 inches)83%high
May Weather14°C (58°F)55 mm (2.2 inches)83%very high
June Weather17°C (64°F)47 mm (1.9 inches)83%very high
July Weather20°C (69°F)5 mm (0.2 inches)82%very high
August Weather21°C (70°F)6 mm (0.2 inches)74%very high
September Weather17°C (64°F)66 mm (2.6 inches)71%high
October Weather11°C (53°F)101 mm (4.0 inches)81%moderate
November Weather8°C (46°F)163 mm (6.4 inches)87%moderate
December Weather5°C (41°F)188 mm (7.4 inches)87%low

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