2005 Forester running hot. Cause?

What is your question?

Car heats up when driving up a hill. Have checked the oil (no antifreeze in oil). No oil in the antifreeze. No leaks around water pump and no noise apparent from the water pump. No bubbles can be seen in the radiator with the engine running and the cap off. Have checked the thermostat - opens when hot. What would you suggest I look at next? Problem started when I was driving in a sudden snow/freezing rain storm that iced up the air conditioner condenser in front of the radiator, blocking the air flow through the radiator. Also, the radiator was replaced within the last year.

How long has your 2005 Subaru Forester had this problem?

About a week.