Last updated: August 23, 2025
In May, the average temperature in San Francisco, Colombia hovers around 23°C (74°F), creating a pleasant climate. However, temperatures can range from a minimum of 16°C (62°F) to a sizzling maximum of 33°C (92°F). Expect some rain too, with an average precipitation of 251 mm (9.9 in) spread across 19 days, and a high humidity level of 87% that can make the air feel quite muggy. Stay prepared for a mix of warmth and dampness!
In May in San Francisco, the average temperature is 23°C (74°F). The maximum can reach 33°C (92°F), while the minimum can dip as low as 16°C (62°F). This pleasant climate makes San Francisco an ideal destination for outdoor activities and sightseeing during this time of year.
In San Francisco in May, the total precipitation amount is 251 mm (9.9 in) spread over 19 days.
In San Francisco in May, humidity is 87%. With an average temperature of 23°C (74°F), this humidity feels like a warm, sticky embrace that can quickly wear you down while traveling, making even short walks feel exhausting and necessitating frequent breaks for hydration and cool air.
In San Francisco in May, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in San Francisco.
UV Risk Categories
Weather in San Francisco varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in San Francisco, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 22°C (73°F) | 105 mm (4.2 inches) | 78% | extreme |
| February Weather | 23°C (74°F) | 101 mm (4.0 inches) | 77% | extreme |
| March Weather | 23°C (74°F) | 238 mm (9.4 inches) | 80% | extreme |
| April Weather | 23°C (74°F) | 252 mm (9.9 inches) | 83% | extreme |
| May Weather | 23°C (74°F) | 251 mm (9.9 inches) | 87% | extreme |
| June Weather | 23°C (74°F) | 103 mm (4.1 inches) | 87% | extreme |
| July Weather | 24°C (76°F) | 55 mm (2.2 inches) | 85% | extreme |
| August Weather | 24°C (76°F) | 94 mm (3.7 inches) | 80% | extreme |
| September Weather | 23°C (75°F) | 147 mm (5.8 inches) | 80% | extreme |
| October Weather | 23°C (73°F) | 279 mm (11.0 inches) | 85% | extreme |
| November Weather | 22°C (72°F) | 425 mm (16.7 inches) | 87% | extreme |
| December Weather | 23°C (73°F) | 146 mm (5.7 inches) | 83% | extreme |