Go to Simulation Settings and make sure you have specified the correct date ranges and enabled "Run simulation for weather file run periods".

Also, make sure your weather file has a full year. If you downloaded an .epw weather file from DOE, you're fine.

Go to Simulation Settings and make sure you have specified the correct date ranges and enabled "Run simulation for weather file run periods".

periods". Also, make sure your weather file has a full year. If you downloaded an .epw weather file from DOE, DOE, you're fine.