UPDATE: the problem seems to have been resolved from about 2017-01-27 17:00 GMT. Sorry again for this problem!
ORIGINAL: Unfortunately for many of the weather stations in our system the last day or two of data is not currently available. There was a recent change made to Weather Underground’s system that has meant we are currently unable to access fresh temperature data until we can resolve the problem with them. This is affecting both the Degree Days.net website and API.
We are hoping to have this problem resolved at some point today (January 27th, 2017).
Our sincere apologies for this inconvenience!