October Weather in Rainier, United States

Last updated: June 24, 2025

In October, the average temperature in Rainier, United States hovers around 11°C (51°F). While you might experience a chilly minimum of -2°C (29°F), the warmth can reach a pleasant 24°C (76°F). Be prepared for some rain, as the region sees an average precipitation of 117 mm (4.6 in) spread over 12 days. With an average humidity of 81%, it’s advisable to dress in layers and keep an umbrella handy!

October Temperature in Rainier

In October in Rainier, the average temperature is 11°C (51°F). The maximum can reach 24°C (76°F), while the minimum can be as low as -2°C (29°F). This varied climate makes it a perfect time for travelers to pack layers and enjoy outdoor activities in Rainier.

October Weather in Rainier: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Rainier, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rainier, October typically has an average temperature of 11°C (51°F), with highs reaching up to 24°C (76°F) and lows dropping to around -2°C (29°F).

Data source: Temperature data for Rainier generated using information from the Copernicus Climate Change Service.

October Precipitation in Rainier

In Rainier in October, the total precipitation amount is 117 mm (4.6 in), occurring over a span of 12 days.

October Precipitation Trends in Rainier

The chart displays monthly precipitation patterns in Rainier, 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 Rainier, October typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 12 days.

Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

October Humidity in Rainier

In Rainier in October, humidity is 81%. With an average temperature of 11°C (51°F), this humidity feels like walking through a thick blanket of moisture, making travel uncomfortable and causing clothes to cling to the skin, while the crisp air adds a chill that contrasts sharply with the heavy, humid atmosphere.

October Average Humidity in Rainier

This chart illustrates the average monthly humidity levels in Rainier, 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 Rainier is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Rainier

In Rainier 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 Rainier.

Maximum UV Index Levels in Rainier for October

The chart shows the monthly maximum UV Index (UVI) for Rainier 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 Rainier typically reaches 5, which falls under the moderate exposure category.

Data source: Rainier 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 Rainier Compares to Other Months

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

This table compares monthly weather conditions in Rainier, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	183 mm (7.2 inches)	85%	low
February Weather	4°C (40°F)	166 mm (6.5 inches)	84%	moderate
March Weather	7°C (45°F)	145 mm (5.7 inches)	85%	moderate
April Weather	10°C (50°F)	119 mm (4.7 inches)	83%	high
May Weather	13°C (56°F)	71 mm (2.8 inches)	83%	very high
June Weather	16°C (61°F)	59 mm (2.3 inches)	83%	very high
July Weather	18°C (65°F)	9 mm (0.4 inches)	82%	very high
August Weather	19°C (66°F)	9 mm (0.4 inches)	74%	very high
September Weather	16°C (62°F)	79 mm (3.1 inches)	71%	high
October Weather	11°C (51°F)	117 mm (4.6 inches)	81%	moderate
November Weather	7°C (45°F)	172 mm (6.8 inches)	87%	moderate
December Weather	5°C (40°F)	192 mm (7.6 inches)	87%	low