Last updated: June 24, 2025
In Petersburg, United States, the average temperature in May hovers around 16°C (62°F), with fluctuations that can see minimums dip to -2°C (29°F) and soar up to 31°C (88°F). Expect 124 mm (4.9 in) of precipitation spread over 14 days, contributing to an average humidity of 78%. Prepare for a mix of weather as you embrace the unique climate of this region!
In May in Petersburg, the average temperature is 16°C (62°F). The maximum can reach 31°C (88°F), and the minimum can be as low as -2°C (29°F). This makes it advisable for travelers to pack for both warm and chilly conditions while exploring.
In Petersburg in May, the precipitation amount is 124 mm (4.9 in) over a span of 14 days.
In Petersburg in May, humidity is 78%. With an average temperature of 16°C (62°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities enjoyable yet slightly sticky. Travelers may find the weather pleasantly mild, though they'll appreciate having light, breathable clothing on hand to stay comfortable while exploring.
In Petersburg 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 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 | 0°C (33°F) | 62 mm (2.4 inches) | 86% | moderate |
February Weather | 3°C (38°F) | 94 mm (3.7 inches) | 86% | moderate |
March Weather | 6°C (43°F) | 77 mm (3.0 inches) | 86% | high |
April Weather | 11°C (52°F) | 103 mm (4.0 inches) | 84% | very high |
May Weather | 16°C (62°F) | 124 mm (4.9 inches) | 78% | very high |
June Weather | 21°C (69°F) | 100 mm (4.0 inches) | 79% | very high |
July Weather | 24°C (75°F) | 89 mm (3.5 inches) | 70% | very high |
August Weather | 22°C (72°F) | 95 mm (3.8 inches) | 59% | very high |
September Weather | 19°C (67°F) | 108 mm (4.2 inches) | 68% | very high |
October Weather | 14°C (57°F) | 106 mm (4.2 inches) | 80% | high |
November Weather | 6°C (42°F) | 64 mm (2.5 inches) | 86% | moderate |
December Weather | 3°C (37°F) | 87 mm (3.4 inches) | 85% | moderate |