Rain to Snow Calculator
Convert rainfall amounts to equivalent snowfall using temperature-based formulas
Rain to Snow Calculator
Convert rainfall amounts to equivalent snowfall using temperature-based formulas.
How Rain Becomes Snow
When temperatures drop below freezing, rain can turn to snow. The amount of snow depends on temperature, humidity, and wind conditions. This calculator uses the "10:1 rule" as a baseline but adjusts for actual conditions.
The 10:1 Rule
The basic rule states that 1 inch of rain equals 10 inches of snow:
This is a rough estimate that varies with temperature and conditions.
Colder temperatures generally produce more snow per inch of rain.
Temperature Effects
- 32°F (0°C): Rain freezes instantly (10:1 ratio)
- 20°F (-6°C): More efficient freezing (15:1 ratio)
- 0°F (-18°C): Very efficient freezing (20:1 ratio)
- Below 0°F: Maximum efficiency (25:1 ratio)
Why Convert?
- Weather Planning: Understand storm impacts
- Snow Removal: Prepare equipment and resources
- Water Management: Track water equivalent
- Scientific Analysis: Compare precipitation types
When to Use It
Use this calculator when winter storms transition from rain to snow, or when planning for changing weather conditions. Essential for accurate snowfall predictions and winter preparedness.
Learn more about rain to snow conversion and winter weather preparation.