Last updated: June 24, 2025
In August, the average temperature in Mason City, United States reaches a pleasant 21°C (71°F). However, be prepared for a wide range; temperatures can dip as low as 9°C (49°F) or soar up to 36°C (97°F). During this month, expect 118 mm (4.7 in) of precipitation spread over approximately 10 days, contributing to a 77% average humidity that adds to the tropical atmosphere.
In August, in Mason City, the average temperature is 21°C (71°F). Maximums can reach 36°C (97°F), while minimums can drop as low as 9°C (49°F). This makes Mason City a great destination for travelers seeking warm days and cooler nights.
In Mason City in August, the precipitation amount is 118 mm (4.7 in) over a span of 10 days.
In Mason City in August, humidity is 77%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace that envelops you, making it both refreshing and slightly heavy, which can be a bit tiring for traveling.
In Mason City in August, 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 Mason City.
UV Risk Categories
Weather in Mason City varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Mason City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (19°F) | 36 mm (1.4 inches) | 82% | moderate |
| February Weather | -8°C (18°F) | 47 mm (1.9 inches) | 84% | moderate |
| March Weather | 1°C (35°F) | 71 mm (2.8 inches) | 80% | moderate |
| April Weather | 7°C (45°F) | 80 mm (3.1 inches) | 81% | very high |
| May Weather | 15°C (60°F) | 159 mm (6.3 inches) | 74% | very high |
| June Weather | 22°C (72°F) | 132 mm (5.2 inches) | 80% | extreme |
| July Weather | 23°C (74°F) | 98 mm (3.8 inches) | 80% | very high |
| August Weather | 21°C (71°F) | 118 mm (4.7 inches) | 77% | very high |
| September Weather | 18°C (65°F) | 108 mm (4.2 inches) | 75% | very high |
| October Weather | 10°C (49°F) | 112 mm (4.4 inches) | 80% | moderate |
| November Weather | 1°C (35°F) | 49 mm (1.9 inches) | 87% | moderate |
| December Weather | -3°C (27°F) | 35 mm (1.4 inches) | 83% | moderate |