Add spaces: Soonemustassume,thattheycaninformeachotheraboutquitealot.

Answer: So one must assume, that they can inform each other about quite a lot.

Add spaces: Winterlandscapes,Landscapes,photosoflandscapes

Answer: Winter landscapes, Landscapes, photos of landscapes

Add spaces: OnSaturdaywecanexpectsunnyweather.Morningtemperatureswillbearound18C.Duringthedaytheywillreachamaximumof29C.Lowtemperaturesatnightwillbearound18C.Wehaveweaknorthwesterlywinds.

Answer:
On Saturday we can expect sunny weather. Morning temperatures will be around 18 C. During the day they will reach a maximum of 29 C. Low temperatures at night will be around 18C. We have weak northwesterly winds.