Last updated: June 24, 2025
In May, the average temperature in Karlstad, United States is a mild 12°C (55°F). Temperatures can range from a chilly -5°C (23°F) to a warm 31°C (89°F). Expect 54 mm (2.1 in) of precipitation over 9 days, contributing to an average humidity of 74%. Whether you’re bracing for a cold snap or enjoying the warmth, be prepared for a mix of weather!
In May in Karlstad, the average temperature is 12°C (55°F). Maximum temperatures can reach 31°C (89°F), while minimum temperatures can drop as low as -5°C (23°F). Travelers should be prepared for a wide range of temperatures during this time, making layering essential for comfort.
In Karlstad in May, the precipitation amount is 54 mm (2.1 in) over a span of 9 days.
In Karlstad in May, humidity is 74%. With an average temperature of 12°C (55°F), this humidity feels like a cool, damp chill clinging to your skin, making outdoor activities less enjoyable and encouraging you to seek sheltered spots or cozy cafes to stay warm while exploring the area.
In Karlstad in May, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Karlstad.
UV Risk Categories
Weather in Karlstad varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Karlstad, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -14°C (8°F) | 18 mm (0.7 inches) | 94% | low |
| February Weather | -15°C (6°F) | 20 mm (0.8 inches) | 91% | moderate |
| March Weather | -4°C (25°F) | 24 mm (0.9 inches) | 90% | moderate |
| April Weather | 3°C (38°F) | 34 mm (1.3 inches) | 81% | high |
| May Weather | 12°C (55°F) | 54 mm (2.1 inches) | 74% | very high |
| June Weather | 19°C (67°F) | 88 mm (3.5 inches) | 75% | very high |
| July Weather | 21°C (71°F) | 75 mm (2.9 inches) | 74% | very high |
| August Weather | 19°C (67°F) | 73 mm (2.9 inches) | 77% | very high |
| September Weather | 14°C (58°F) | 76 mm (3.0 inches) | 75% | high |
| October Weather | 6°C (42°F) | 83 mm (3.3 inches) | 78% | moderate |
| November Weather | -4°C (25°F) | 29 mm (1.1 inches) | 87% | low |
| December Weather | -10°C (15°F) | 33 mm (1.3 inches) | 93% | low |