I was tired and I… to get some fresh air.( want) When I … the window I was happy to see that it…( open, rainy) Past simple or past continuous

The correct sentence would be:

"I was tired and I wanted to get some fresh air. When I opened the window I was happy to see that it was raining."

In this case:

• "wanted" is in the past simple, indicating a completed action or state.
• "opened" is also in the past simple, indicating another completed action.
• "was raining" is in the past continuous, indicating an ongoing action at the time in the past.