Search E Bay, Amazon or Alibaba for AWS. The lowest cost would be around 400 USD. Most of the AWS capable to connect with Google, thus you can monitor your outside weather at real time with your smart phone. i use for a 3 years, so far working well.
I agree with Prashant, you may want to check out Campbell Scientific. They are one of the best manufacturers with reliable experience. Many (maybe all) of the meteorological instruments I have ever worked with were manufactured by Campbell Scientific Inc.