Weather & Climate
Weather-related calculations and environmental planning tools.
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Heat Index Calculator
Calculate the heat index (feels-like temperature) based on air temperature and humidity. Assess heat danger level.
Dew Point Calculator
Calculate the dew point temperature from air temperature and relative humidity. Includes comfort level assessment and frost risk.
USDA Growing Zone Calculator
Find your USDA Plant Hardiness Zone based on average annual extreme minimum temperature. Know what plants will thrive in your area.
Snow Load Calculator
Calculate roof snow load in PSF based on snow depth, type, and roof pitch. Assess structural risk level.
Daylight Hours Calculator
Calculate sunrise, sunset, and total daylight hours for any location and date. See monthly daylight patterns.
Rainfall & Irrigation Calculator
Calculate lawn irrigation needs based on rainfall, lawn size, and target watering. See weekly water deficit, watering time, and cost.
Frost Date Calculator
Find estimated last spring frost and first fall frost dates by USDA hardiness zone. Plan your garden planting window with confidence.
UV Index Calculator
Assess UV exposure risk based on UV index, skin type, altitude, and snow cover. Get personalized burn time and SPF recommendations.
Wind Speed Converter
Convert wind speed between mph, km/h, m/s, and knots. See Beaufort scale rating and wind description.
Humidity Calculator
Calculate relative humidity from temperature and dew point. Understand comfort levels and weather conditions.
Temperature Comfort Index Calculator
Complete weather comfort calculator — calculate wind chill, heat index, dew point, and feels-like temperature. Assess safety risks and get clothing/hydration recommendations.
Wind Chill Calculator
Calculate the wind chill temperature using the official NWS formula. Assess frostbite risk based on conditions.
Feels Like Temperature Calculator
Calculate the 'feels like' temperature considering wind chill and heat index. Understand perceived temperature.