April Weather in Portola, United States

Last updated: June 24, 2025

In April, the average temperature in Portola, United States hovers around 5°C (41°F), with fluctuations that can see the minimum drop to -12°C (11°F) and the maximum soar to 25°C (76°F). You can expect about 72 mm (2.8 in) of precipitation over 8 days, creating a backdrop of 81% average humidity that adds a unique atmosphere to the locale.

April Temperature in Portola

In April in Portola, the average temperature is 5°C (41°F). The maximum can reach 25°C (76°F) and the minimum can be as low as -12°C (11°F). Be prepared for a wide range of temperatures when planning your trip to Portola during this time.

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

The chart illustrates April temperature patterns in Portola, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portola, April typically has an average temperature of 5°C (41°F), with highs reaching up to 25°C (76°F) and lows dropping to around -12°C (11°F).

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

April Precipitation in Portola

In Portola in April, the precipitation amount is 72 mm (2.8 in) over the course of 8 days.

April Precipitation Trends in Portola

The chart displays monthly precipitation patterns in Portola, 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 Portola, April typically receives around 72 mm (2.8 inches) of precipitation spread over approximately 8 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 Portola

In Portola in April, humidity is 81%. With an average temperature of 5°C (41°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor exploration uncomfortable and requiring warm, waterproof clothing to stay comfortable while traveling.

April Average Humidity in Portola

This chart illustrates the average monthly humidity levels in Portola, 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 Portola is approximately 81%, 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 Portola

In Portola in April, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Portola.

Maximum UV Index Levels in Portola for April

The chart shows the monthly maximum UV Index (UVI) for Portola 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 Portola typically reaches 10, which falls under the very high exposure category.

Data source: Portola 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 Portola Compares to Other Months

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

This table compares monthly weather conditions in Portola, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	170 mm (6.7 inches)	84%	moderate
February Weather	-1°C (30°F)	177 mm (7.0 inches)	84%	high
March Weather	1°C (34°F)	146 mm (5.7 inches)	83%	very high
April Weather	5°C (41°F)	72 mm (2.8 inches)	81%	very high
May Weather	10°C (51°F)	60 mm (2.3 inches)	74%	extreme
June Weather	16°C (62°F)	10 mm (0.4 inches)	64%	extreme
July Weather	21°C (70°F)	10 mm (0.4 inches)	44%	extreme
August Weather	20°C (68°F)	13 mm (0.5 inches)	36%	extreme
September Weather	15°C (60°F)	19 mm (0.7 inches)	44%	very high
October Weather	8°C (47°F)	43 mm (1.7 inches)	65%	high
November Weather	3°C (38°F)	79 mm (3.1 inches)	84%	moderate
December Weather	-2°C (29°F)	132 mm (5.2 inches)	83%	moderate