April Weather in Rainier, United States

Last updated: June 24, 2025

In Rainier, United States, the average temperature in April hovers around 10°C (50°F), with extremes ranging from a chilly -2°C (29°F) to a warm 30°C (86°F). Expect about 119 mm (4.7 in) of precipitation spread over 16 days, contributing to a relatively high average humidity of 83%.

April Temperature in Rainier

In April in Rainier, the average temperature is 10°C (50°F), with maximums reaching up to 30°C (86°F) and minimums dropping as low as -2°C (29°F). It's a great time to visit Rainier, as you can experience a range of temperatures perfect for various activities.

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

The chart illustrates April 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, April typically has an average temperature of 10°C (50°F), with highs reaching up to 30°C (86°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.

April Precipitation in Rainier

In Rainier in April, the total precipitation amount reaches 119 mm (4.7 in) over the course of 16 days.

April Precipitation Trends in Rainier

The chart displays monthly precipitation patterns in Rainier, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Rainier, April typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 16 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Rainier

In Rainier in April, humidity is 83%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration less comfortable and prompting visitors to seek cozy indoor activities.

April Average Humidity in Rainier

This chart illustrates the average monthly humidity levels in Rainier, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Rainier is approximately 83%, offering insight into how humid the weather typically is during this month.

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

April UV Index in Rainier

In Rainier in April, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Rainier, you can refer to this Hourly UV Index in Rainier.

Maximum UV Index Levels in Rainier for April

The chart shows the monthly maximum UV Index (UVI) for Rainier in April, 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 April, the maximum UV index in Rainier typically reaches 6, which falls under the high exposure category.

Data source: Rainier April 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 April 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 April’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 April’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