One of the most annoying things about this country's weather is how it can be reliably glorious when the majority are stuck in work/school then piss it down during weekends, BHs or any time you plan a big BBQ or other outdoor event that would be so much nicer if the weather was good.
But I hope you make the most of your staycation and use any funds available to make it feel like a break - days out, treat food, sit in the garden if it's sunny etc.
If it makes you feel any better OP, we went camping just this weekend gone and it was fucking freezing at night even though it was beautiful weather in the daytime.