Last updated: June 24, 2025
In Mountain View, United States, the average temperature in May is a crisp 9°C (49°F). Temperatures can swing from a chilly minimum of -7°C (19°F) to a warm maximum of 28°C (82°F). Visitors can expect about 67 mm (2.7 in) of precipitation over 13 days, coupled with an average humidity level of 62%. Whether you're embracing the chill or enjoying the warmth, prepare for a dynamic climate!
In May in Mountain View, the average temperature is 9°C (49°F), with maximums reaching 28°C (82°F) and minimums dropping as low as -7°C (19°F). Travelers should be prepared for a wide range of temperatures, making layering essential for comfort during their visit.
In Mountain View in May, the precipitation amount is 67 mm (2.7 in) over the course of 13 days.
In Mountain View in May, humidity is 62%. With an average temperature of 9°C (49°F), this humidity feels like a brisk chill that can be invigorating for outdoor activities but may require a light jacket for comfort while traveling.
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 | -6°C (22°F) | 30 mm (1.2 inches) | 91% | moderate |
| February Weather | -5°C (24°F) | 34 mm (1.3 inches) | 92% | high |
| March Weather | -1°C (31°F) | 67 mm (2.6 inches) | 84% | very high |
| April Weather | 4°C (39°F) | 50 mm (2.0 inches) | 74% | very high |
| May Weather | 9°C (49°F) | 67 mm (2.7 inches) | 62% | extreme |
| June Weather | 17°C (62°F) | 24 mm (0.9 inches) | 56% | extreme |
| July Weather | 21°C (70°F) | 15 mm (0.6 inches) | 44% | extreme |
| August Weather | 19°C (67°F) | 24 mm (0.9 inches) | 37% | extreme |
| September Weather | 14°C (58°F) | 29 mm (1.2 inches) | 46% | very high |
| October Weather | 5°C (42°F) | 30 mm (1.2 inches) | 67% | high |
| November Weather | 1°C (34°F) | 32 mm (1.2 inches) | 84% | moderate |
| December Weather | -5°C (23°F) | 31 mm (1.2 inches) | 88% | moderate |