In order to get a realistic simulation of IFR conditions--as well as to legally log IFR experience on the simulator for currency--the weather conditions must be at minimums for the approach you are flying.
- Determine the MDA, DA or DH for the approach you are planning on using, in feet MSL (the first number shown on the approach plate in the minimums section).
- On the right-hand touch monitor, tap MORE.

- Tap the weather icon.

- Tap the weather page 1 icon.

- Tap IFR. This will set the visibility to 2 miles.

- Tap the weather page 2 icon.

- Tap the Stratus button.

- Tap the Cloud Bases button.

- Using your finger, dial in the MDA/DA/DH you noted in step 1, above, rounded up to the nearest 100 feet, then tap ENTER.

- Optionally adjust the cloud tops using the same method, by tapping the cloud tops button.

- Tap the LESS button.