Add spaces: Intheeveningmainlyclearweatherwillprevail.Morningtemperatureswillbearound9°C.Duringthedaytheywillreachamaximumof19°C.Lowtemperaturesatnightwillbearound9°C.Westerlywindsareweak.

Answer: In the evening mainly clear weather will prevail. Morning temperatures will be around 9 °C. During the day they will reach a maximum of 19 °C. Low temperatures at night will be around 9°C. Westerly winds are weak.

Add spaces: Avoidingoutbreaksthatstraintheimmunesystemiswhatmatters.

Answer: Avoiding outbreaks that strain the immune system is what matters.

Add spaces: Reductionofcostsforheatingandcoolingthebuilding

Answer:
Reduction of costs for heating and cooling the building