No, aussehen is a separable verb, but I assume that you could say Sie/sie sehen gewöhnlich aus.
I am English, and I answered "it looks like normal". And by that I mean "it looks the same as it usually looks", or "it appears to be the same as it usually appears" (i.e. "it normally looks that way, and the present case is no exception"). I have lived in Asia for many years, so maybe my English has been influenced by non-native-speakers. But "it looks like normal" seems fine to me.
I think that 'es sieht gewöhnlich draußen aus' might be a translation.
Here.. take a look. These might help you a bit..
sehen - to see http://www.dict.cc/?s=sehenplay_first_audio=DE
aussehen - to look (as in appearance) http://www.dict.cc/?s=Aussehen
Ich sehe das Kleid = I see the dress
Das kleid sieht gut aus = the dress looks good
sieht aus is a conjugation of aussehen (in case it's new to you)
ich sehe gut aus - I look good
du siehst gut aus - you look good
er/sie/es sieht gut aus - he looks good
wir sehen gut aus - we look good
ihr seht gut aus - you (plural familliar) look good
sie sehen gut aus - they look good
Sie sehen gut aus - You (formal singular + plural)