WetBulbCast vs The Dew Point

Is it a good day for your swamp cooler? Your evaporative (swamp) cooler cannot cool the air it blows into your house to below the wet bulb temperature — and how well they work depends almost entirely on one number: the wet-bulb temperature. When it's low, your cooler can drop indoor temperatures dramatically and cheaply. When it's high, running it barely helps. What you get
: • Wet-bulb temperature — the single most important number for swamp cooler effectiveness, shown for every hour of the next 10 days 
 • Dew point — a direct measure of how much moisture is already in the air
 • Feels-like temperature — so you know what it's actually like outside, not just what the thermometer says
 • 10-day hourly forecast — plan your cooler schedule days ahead and whether you may need AC instead 
 • UV index, wind speed, precipitation probability, and cloud cover — the full picture in one compact table
• Interactive chart — visualize temperature, wet-bulb, and dew point trends at a glance 
 • Multiple saved locations — check your home, office, or any place you care about Powered by Apple Weather
 WetBulbCast uses Apple's WeatherKit for accurate, hyperlocal forecasts updated throughout the day.

The Dew Point turns the current temperature and dew point into one glanceable word that tells you how it actually feels outside — Crisp, Pleasant, Muggy, Steamy. Temperature alone doesn't tell the whole story, and relative humidity is misleading: 90% humidity on a cool morning feels fine, while 50% on a hot afternoon can be brutal. The dew point is an absolute measure of the moisture in the air, and it maps directly to how the air feels on your skin. The Dew Point reads it for you and answers in a single word. FEATURES • One-word comfort summary, designed for your watch face • Complications for rectangular, circular, corner, and inline slots: the word, the dew point, and the EPA Air Quality Index • When it's raining or snowing, the word gives way to what's actually falling: Heavy Rain, Snow Showers, Scattered Thunderstorms • Current temperature, dew point, and AQI at a glance in the app • No accounts, no ads, no tracking The Dew Point runs entirely on Apple Watch — no iPhone app needed. Weather data is provided by Apple Weather. Air quality data comes from EPA AirNow (United States only). Location access is used only to fetch conditions where you are; it never leaves your device except to request weather for your coordinates.