August Weather in Rainier, United States

Last updated: June 24, 2025

In August, the average temperature in Rainier, United States hovers around 19°C (66°F). During this time, temperatures can swing from a cool 8°C (47°F) at night to a scorching 38°C (101°F) during the day. Expect some moisture too, with an average precipitation of 9 mm (0.4 in) spread over 2 days. Additionally, the air maintains a comfortable average humidity of 74%, making it a pleasant time to experience the local atmosphere.

August Temperature in Rainier

In August in Rainier, the average temperature is 19°C (66°F). The maximum can reach 38°C (101°F), while the minimum can dip as low as 8°C (47°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack accordingly for both warm days and cool nights.

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

The chart illustrates August 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, August typically has an average temperature of 19°C (66°F), with highs reaching up to 38°C (101°F) and lows dropping to around 8°C (47°F).

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

August Precipitation in Rainier

In Rainier in August, the precipitation amount is 9 mm (0.4 in) over the course of 2 days.

August Precipitation Trends in Rainier

The chart displays monthly precipitation patterns in Rainier, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Rainier, August typically receives around 9 mm (0.4 inches) of precipitation spread over approximately 2 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

August Humidity in Rainier

In Rainier in August humidity is 74%. With an average temperature of 19°C (66°F), this humidity feels like a warm, enveloping blanket, making it ideal for leisurely outdoor exploration but potentially heavy for those not accustomed to tropical conditions.

August Average Humidity in Rainier

This chart illustrates the average monthly humidity levels in Rainier, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Rainier is approximately 74%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Rainier

In Rainier in August, 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 Rainier.

Maximum UV Index Levels in Rainier for August

The chart shows the monthly maximum UV Index (UVI) for Rainier in August, 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 August, the maximum UV index in Rainier typically reaches 8, which falls under the very high exposure category.

Data source: Rainier August 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 August 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 August’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 August’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