May Weather in Fortuna, United States

Last updated: June 24, 2025

In May, the average temperature in Fortuna, United States is a pleasant 12°C (53°F), with temperatures ranging from a cool 4°C (40°F) at night to a warm 23°C (73°F) during the day. Expect around 61 mm (2.4 in) of precipitation spread over 6 days, and enjoy the lush atmosphere with an average humidity level of 81%.

May Temperature in Fortuna

In May in Fortuna, the average temperature is 12°C (53°F). The maximum can reach 23°C (73°F) and the minimum can be as low as 4°C (40°F). This range makes it an ideal time to explore the outdoors while enjoying mild weather.

May Weather in Fortuna: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Fortuna, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fortuna, May typically has an average temperature of 12°C (53°F), with highs reaching up to 23°C (73°F) and lows dropping to around 4°C (40°F).

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

May Precipitation in Fortuna

In Fortuna in May, the total precipitation amount is 61 mm (2.4 in) spread over a period of 6 days.

May Precipitation Trends in Fortuna

The chart displays monthly precipitation patterns in Fortuna, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Fortuna, May typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 6 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Fortuna

In Fortuna in May, humidity is 81%. With an average temperature of 12°C (53°F), this humidity feels like a chilly dampness enveloping you, making outdoor activities uncomfortable and requiring layers to stay warm while you explore.

May Average Humidity in Fortuna

This chart illustrates the average monthly humidity levels in Fortuna, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Fortuna is approximately 81%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Fortuna

In Fortuna in May, 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 Fortuna.

Maximum UV Index Levels in Fortuna for May

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

Data source: Fortuna May 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 May Weather in Fortuna Compares to Other Months

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

This table compares monthly weather conditions in Fortuna, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	205 mm (8.1 inches)	86%	moderate
February Weather	8°C (47°F)	188 mm (7.4 inches)	85%	moderate
March Weather	9°C (48°F)	164 mm (6.5 inches)	85%	high
April Weather	10°C (51°F)	93 mm (3.7 inches)	82%	very high
May Weather	12°C (53°F)	61 mm (2.4 inches)	81%	very high
June Weather	14°C (57°F)	17 mm (0.7 inches)	79%	extreme
July Weather	15°C (59°F)	2 mm (0.1 inches)	70%	very high
August Weather	16°C (61°F)	2 mm (0.1 inches)	60%	very high
September Weather	16°C (61°F)	20 mm (0.8 inches)	62%	very high
October Weather	13°C (56°F)	49 mm (1.9 inches)	72%	high
November Weather	11°C (51°F)	112 mm (4.4 inches)	87%	moderate
December Weather	9°C (48°F)	150 mm (5.9 inches)	86%	low