Last updated: June 24, 2025
In March, the average temperature in Petersburg, United States hovers around 3°C (38°F), with extremes ranging from a chilling -13°C (9°F) to a balmy 25°C (78°F). Expect about 77 mm (3.0 in) of precipitation spread over 9 days, while humidity levels linger at a notable 87%. Prepare accordingly for a mix of cool and wet conditions!
In March in Petersburg, the average temperature is 3°C (38°F). Maximum temperatures can reach 25°C (78°F), while the minimum can drop as low as -13°C (9°F). Be prepared for a wide range of temperatures during your travels, ensuring you pack accordingly for both warm and cold conditions.
In Petersburg in March, the precipitation amount is 77 mm (3.0 in) over the course of 9 days.
In Petersburg in March humidity is 87%. With an average temperature of 3°C (38°F), this humidity feels like a chilly blanket wrapped around you, making travel quite uncomfortable as the cold dampness seeps into your clothes and lingers in the air, often leaving you shivering and longing for warmer, drier conditions.
In Petersburg in March, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, 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 March’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 |