According to Brian Adams, author of "Indoor Outdoor Thermometer,s" the La Crosse Wood Indoor/Outdoor Thermometer is "by far the best thermometer on the market today for both indoors and outdoors." Adams says the combination of accuracy, options, ease of use, aesthetics and fairly low cost, make it a great buy.
Wireless Indoor Outdoor Thermometer, an on-line resource for wireless thermometer enthusiasts, recommends the Oregon Scientific RMR683HGA Wireless Indoor/Outdoor Thermometer. According to the website, "It also provides indicators for the heat index and comfort level. The self-setting clock automatically sets itself to the U.S. Atomic Clock, adjusts for Daylight Savings time and includes a crescendo alarm with snooze function."
According to Wireless Indoor Outdoor Thermometer, the Honeywell TE219ELW Wireless Indoor/Outdoor Thermometer is another good choice for an indoor/outdoor thermometer. Wireless Outdoor Thermometer notes the Honeywell's "funky blue backlight" and says, "Users will also delight in the unit’s wide outdoor temperature range–which varies from -38 to 158 degrees F when powered by lithium batteries to -4 to 158 degrees F on alkaline batteries–and its programmable ice warning alarm, which lets you know when a frost is predicted so you can take precautions."