Without wanting to upset the OP, the weather around Denham was perfect for flying today! I understand that lessons were running a little late due to overnight ice but otherwise no problems.
DON'T believe the Denham weather page - it isn't always accurate. When I checked it early this morning it was apparently snowing! Took off a few hours later in glorious sunshine and returned late afternoon to similar sunshine.
DO persevere - as you get more advanced and do solo flights, the instructors are very picky with the weather and only want to send you out when it is perfect. Take the opportunity to knock off all the ground exams so when the sun does shine you are ready.
Hoping for clear skies for us all.