You may want to:

- Focus on the input on load

- Detect location on load

- Get some auto-completion going (less than 3 clicks)

- Have the option for Celsius and Fahrenheit on the first page (You have a lot of space for it)

- Browser back functionality is not working after #links

- Keep the Sharing bar out the first time (no repeats)

- What does the 0228 #USFL0228 stand for in that link for Jacksonville NAS, FL ? (I am not familiar with US Zip Codes that well)

Some related sites you may want to check

http://www.thefuckingweather.com/

http://time.is/ ( This one does time well imho)