The ad, created by Leo Burnett with media bought by OMD, builds on the fast food chain's celebration of its British-sourced ingredients as part of its sponsorship of the London 2012 Olympics.
McDonald's, headed up by chief executive Steve Easterbrook, announced it was throwing open the gates to some of the British and Irish farms that supply its menu by inviting members of the public to see them firsthand.
The ad is filmed on location in Derbyshire, Cumbria and Staffordshire at farms which supply McDonald's with organic milk, free-range eggs and potatoes.
It does not feature McDonald's outlets but instead it mixes the real world with the world of weather icons, including a rain and sun icon.
Jill McDonald, chief marketing officer for the UK and Northern Europe, said: "With this commercial we honour two things which are unmistakably British – unpredictable weather and first-rate farming.
"This is the next chapters in our ongoing campaign to drive awareness of the care and attention that our supply chain puts into producing McDonald’s food."