Last updated: June 24, 2025
In May, the average temperature in Petersburg, United States hovers around 16°C (60°F). However, temperatures can range significantly, with a minimum of -2°C (29°F) and a maximum reaching up to 33°C (92°F). Be prepared for some rain, as the area receives about 126 mm (5.0 in) of precipitation over 15 days. Additionally, expect a high average humidity of 81%, making the air feel quite damp.
In May in Petersburg, the average temperature is 16°C (60°F). The maximum can reach 33°C (92°F) and the minimum can be as low as -2°C (29°F). Be prepared for varying weather conditions if you're traveling during this time!
In Petersburg in May, the precipitation amount is 126 mm (5.0 in) spread over 15 days.
In Petersburg in May, humidity is 81%. With an average temperature of 16°C (60°F), this humidity feels like a warm, heavy blanket wrapping around you as you travel, making you acutely aware of the sweat on your skin and creating an atmosphere that might dampen your spirits but also invites you to seek out refreshing beverages and shady spots.
In Petersburg in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Petersburg.
UV Risk Categories
Weather in Petersburg varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Petersburg, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (28°F) | 65 mm (2.6 inches) | 88% | low |
| February Weather | -2°C (29°F) | 67 mm (2.6 inches) | 87% | moderate |
| March Weather | 3°C (38°F) | 77 mm (3.0 inches) | 87% | moderate |
| April Weather | 9°C (48°F) | 89 mm (3.5 inches) | 87% | very high |
| May Weather | 16°C (60°F) | 126 mm (5.0 inches) | 81% | very high |
| June Weather | 21°C (71°F) | 86 mm (3.4 inches) | 82% | very high |
| July Weather | 24°C (75°F) | 105 mm (4.1 inches) | 81% | very high |
| August Weather | 23°C (73°F) | 73 mm (2.9 inches) | 78% | very high |
| September Weather | 19°C (67°F) | 59 mm (2.3 inches) | 78% | very high |
| October Weather | 13°C (55°F) | 99 mm (3.9 inches) | 82% | high |
| November Weather | 4°C (40°F) | 82 mm (3.2 inches) | 89% | moderate |
| December Weather | 1°C (33°F) | 54 mm (2.1 inches) | 86% | low |