NOAA Space Weather
NOAA Space Weather provides near-term aurora chances, current geomagnetic activity, a three-day Kp outlook, and NOAA alerts from the past 1–7 days.
AccuWeather
AccuWeather provides current conditions and RealFeel, plus up to 15 available daily forecasts; shorter public forecasts may return fewer days.
AirNow
Current and forecast air quality for reporting areas in the United States and covered cities in Canada and Mexico.
IQAir
City air quality readings and forecasts from IQAir.
MSN Weather
MSN Weather provides current conditions and forecasts for places worldwide, including up to 10 days ahead and optional hourly forecasts for the next 24 hours.
National Hurricane Center
National Hurricane Center provides official Atlantic and Pacific tropical cyclone forecasts and advisories, including active storms and their latest public conditions, hazards, and forecast cones.
National Weather Service
National Weather Service provides U.S. day-and-night forecasts for seven days, hourly forecasts for up to 156 hours where available, active alerts, and latest nearby station observations.
NOAA Tides and Currents
NOAA Tides and Currents provides coastal observations and predictions: tide times within 30 miles of prediction stations, latest levels within 50 miles of reporting stations.
OnTheSnow
Snow reports and ski resort conditions.
Pollen.com
Pollen levels and allergy forecasts for locations in the United States.
Surfline
Surf conditions and forecasts for surf spots.
The Weather Channel
The Weather Channel returns current conditions, today’s high/low, up to 15 daily forecasts (sometimes fewer), 1–48 local hourly forecasts, and active severe weather alerts.
Weather Underground
Historical and current weather conditions from stations worldwide.