if rate limits are an issue (i.e. too many publishes at once) you can simply combine your data into a single publish.. then parse it at the receiving end.
If I were you I would send all four variables wrapped in an easy-to-parse string:
char publishString[255] = ""; // yes you can send up to 255 bytes
snprintf(publishString, sizeof(publishString), "%.2f~%.1f~%d~%.1f~", temp, humidity, pressure, dewPt);
Particle.publish("MyData", publishString);
kind-of-thing...
now your data looks like this:
72.35~34.1~10345~45.2~
easy to parse on the receiving end using strtok()!