Last updated: June 24, 2025
In May, the average temperature in Mountain View, United States is a comfortable 19°C (66°F). However, temperatures can vary significantly, dipping to a chilly 2°C (36°F) at night and soaring to a warm 33°C (91°F) during the day. Expect about 189 mm (7.4 in) of precipitation over 15 days, contributing to an average humidity of 83%—perfect for those who enjoy a lush, vibrant atmosphere!
In May in Mountain View, the average temperature is 19°C (66°F), with maximums reaching up to 33°C (91°F) and minimums dipping as low as 2°C (36°F). This makes it a great time for travelers to enjoy a mix of warm days and cool nights, perfect for exploring the local sights.
In Mountain View in May, the precipitation amount is 189 mm (7.4 in) spread over 15 days.
In Mountain View in May, humidity is 83%. With an average temperature of 19°C (66°F), this humidity feels like a heavy blanket wrapping around you, making travel feel more sluggish and muggy, yet there's a refreshing coolness in the air that invites you to explore.
In Mountain View in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Mountain View.
UV Risk Categories
Weather in Mountain View varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Mountain View, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (35°F) | 79 mm (3.1 inches) | 83% | moderate |
| February Weather | 3°C (39°F) | 107 mm (4.2 inches) | 81% | high |
| March Weather | 9°C (49°F) | 148 mm (5.8 inches) | 80% | high |
| April Weather | 13°C (55°F) | 164 mm (6.5 inches) | 80% | very high |
| May Weather | 19°C (66°F) | 189 mm (7.4 inches) | 83% | extreme |
| June Weather | 24°C (75°F) | 77 mm (3.0 inches) | 83% | extreme |
| July Weather | 26°C (79°F) | 80 mm (3.2 inches) | 76% | extreme |
| August Weather | 24°C (76°F) | 108 mm (4.2 inches) | 69% | very high |
| September Weather | 22°C (72°F) | 53 mm (2.1 inches) | 68% | very high |
| October Weather | 15°C (59°F) | 122 mm (4.8 inches) | 72% | high |
| November Weather | 8°C (46°F) | 73 mm (2.9 inches) | 83% | moderate |
| December Weather | 5°C (41°F) | 71 mm (2.8 inches) | 86% | moderate |