The Acu-Rite is an Indoor/Outdoor thermometer with humidity. Some Wal-Marts will have them in the Home Hardware section. You may also be able to find them at Lowes or Home Depot in the Outdoors section. They cost about $12. It looks like this...
This is your best bet, but if you can't find one, then you may need to check at your local pet shops or online for some digital thermometers and a Hygrometer. The Acu-Rite just works because it measures 2 temps and humidity and is contained in one unit...
