Last updated: June 24, 2025
In Fountain Valley, United States, the average temperature in May is a pleasant 18°C (64°F). Expect a range that can dip to a minimum of 11°C (52°F) and peaking at a warm 30°C (86°F). During this month, precipitation is recorded at 12 mm (0.5 in) over approximately 3 days, with an average humidity of 70%. Perfect weather for exploring!
In May in Fountain Valley, the average temperature is 18°C (64°F). The maximum can reach 30°C (86°F), while the minimum can drop to as low as 11°C (52°F). This pleasant weather makes it an ideal time for travelers to explore the sights and enjoy outdoor activities.
In Fountain Valley in May, the precipitation amount is 12 mm (0.5 in) during a span of 3 days.
In Fountain Valley in May humidity is 70%. With an average temperature of 18°C (64°F), this humidity feels like a sticky embrace, making outdoor excursions a bit more cumbersome and requiring frequent breaks to stay refreshed and hydrated.
In Fountain Valley 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 Fountain Valley.
UV Risk Categories
Weather in Fountain Valley varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Fountain Valley, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 14°C (57°F) | 65 mm (2.5 inches) | 74% | moderate |
February Weather | 14°C (58°F) | 52 mm (2.0 inches) | 79% | high |
March Weather | 15°C (60°F) | 55 mm (2.2 inches) | 75% | very high |
April Weather | 17°C (63°F) | 23 mm (0.9 inches) | 70% | very high |
May Weather | 18°C (64°F) | 12 mm (0.5 inches) | 70% | very high |
June Weather | 20°C (68°F) | 4 mm (0.2 inches) | 72% | extreme |
July Weather | 22°C (72°F) | 3 mm (0.1 inches) | 73% | extreme |
August Weather | 23°C (73°F) | 2 mm (0.1 inches) | 69% | very high |
September Weather | 22°C (72°F) | 3 mm (0.1 inches) | 68% | very high |
October Weather | 20°C (69°F) | 9 mm (0.4 inches) | 67% | high |
November Weather | 17°C (63°F) | 18 mm (0.7 inches) | 68% | moderate |
December Weather | 14°C (58°F) | 68 mm (2.7 inches) | 71% | moderate |