I wish NWS would add WB to their AP (https://api.weather.gov/stations/KMHT/observations/latest)I, but in the mean time, I use the calculation from this site: https://www.omnicalculator.com/physics/wet-bulb#how-to-calculate-the-wet-bulb-temperature to do the math on my local temperature and humidity sensors using Home Assistant (sorry I keep mentioning HA, but it is really helpful and free).