Amazon.com has a La Crosse Technology WS-7047U Wireless Rain and Temperature Gauge for $27.99 with Free Shipping.
n- n
- Base unit measures 4-1/2 by 3-1/2 by 1 inches n
- Wireless rain and temperature gauge n
- Displays indoor and outdoor temperature; monitors rainfall over time n
- Display station; 2 remote sensors (one for rainfall, one for outdoor temperature) n
- Conservative design; goes well in any home or office