Here is a small DHT22/AM2302 Sensor Project Box with lid. The lid is snap fit and the sensor fits quite well in the box with the print settings I chose. It has a recess in the back for a small nut and a hole for mounting. The regular box is setup to allow 3 breadboard jumpers through the slot but I have created one with space for 4 jumpers in case you need all 4. I have no use for the 4 jumper arrangement right now, but figured it was a good item to complement the original. This item was built as a part of my Arduino Project Box (http://www.thingiverse.com/thing:1520159).
Minor support required for main box - no support required for lid when printed flat on back. Printed in ABS with 3 shell layers, 7 top and bottom layers. My infill for these parts was 30% and layer height 0.12mm, feel free to change them to your desired amounts.