As this summer has proven, the rain is one thing you can always count on in London. The good news is there's no other city equipped quite as well with things to do during wet weather. With autumn now in full swing and more rain undoubtedly on the way, have no fear. Our essential guide of things to do in London when it rains this season will make you wonder what the big deal is about sunshine anyway. Well, almost.

Marilyn Monroe: A British Love Affair

What better way to spend a rainy Saturday afternoon than surrounded by glamorous retro portraits? Kicking off this weekend at the National Portrait Gallery is a brand new exhibition on the one and only, Marilyn Monroe. Portraits of the iconic actress taken by British photographers will be displayed alongside rare magazine covers and film stills. An absolute must-see.

Sep 29 – Mar 24 2013

National Portrait Gallery

The Curious Incident of the Dog in the Night-Time

One thing the rain will never ruin is an evening at the theatre (unless you’re heading to the open air one at Regent's Park). Whether you’ve read the book or not, we highly recommend going to see Simon Stephen’s stage adaption of Mark Haddon’s successful novel. In the book, the story is told through the eyes of an autistic boy named Christopher, whose lack of self-awareness is both startling and endearing. Stephens manages to bring this extraordinary tale to life in a unique way that remains true to the book.

Showing now until Sat Oct 27

National Theatre, South Bank

Hollywood Costume

There’s no better way to kick the rainy blues than with a dose of fashion, especially when it comes from the silver screen. Some of cinema’s best-known and most-loved costumes have been brought together for this major exhibition at the V&A, which explores the art of costume design. From the LBD designed by Givenchy for Audrey Hepburn in Breakfast at Tiffany’s, to Johnny Depp’s outfit in Pirates of the Caribbean, this is one exhibition not to be missed.

Oct 20 – Jan 27 2013

V&A, Cromwell Road

Singin’ in the Rain

Yes, we know we’ve already mentioned the theatre – but how could we leave this one out? Jonathan Church’s stylish rendition of the 1952 movie set in the 20s is a feel good classic that’s bound to get your toe tapping. From its catchy songs to flapper fashion, this is one show that never loses its appeal. Make an evening of it, rain or shine.

Showing now until Aug 31 2013

Palace Theatre, Shaftesbury Avenue