The week is forecast to be up and down very much in the sense of changing between, in the grand scheme, a mild warmth and mild chill. This could mean temperatures change, skies change from gloomy to sunshine and rain comes and goes. Nothing out of the ordinary really.
The weather in the next few days will be cloudy but hot. A condition which is commonly referred to as muggy. Muggy is not a desirable weather pattern for humans but for forests and shrubbery and foliage quite beneficial. This is because the humidity and warmth acts like a green house which keeps plants moist and warm, perfect conditions for growth. Heatwaves are forecast to come. The hot weather is said to last till Autumn, which makes you wonder if the weather forecasters actually understand that this happens every year. And whether what they mean by ‘heat wave’ is actually just summer, but one that is hotter than previously.