Biking to work in summer can be hot work and Sustrans, the UK org promoting cycling, is here to help. But first, they quote a study that found that 38 percent of British office workers would consider commuting to work if their workplace offered better facilities, which I suspect might be a lot of people looking for an excuse, and that you don't necessarily need proper facilities for people who bike any more than you need them for people who walk. Carlton Reid figured this out a decade ago, writing in the Guardian:

Why are British cycle planners fixated on personal hygiene? Cycling short distances across town in normal clothes isn't a sweat-fest. Installing showers reinforces the view that cycling is difficult, smelly and, well, different.



Sustrans makes a few points that are basic to surviving in the heat:

Slow down



If you can walk without dying from the heat, then you can ride at a pace that doesn't make you sweat any more than walking would. And you will probably be dryer because of the cooling effect of the air movement.

Switch to Panniers

Or get a basket or a carrier, just don't wear a backpack. The point of sweating is to keep you cool by evaporation, and it can't evaporate if it is trapped under a pack.

Lloyd Alter/ in Berlin/CC BY 2.0

Dress for the weather

Wear what you would if you were walking. I don't know what to say about companies with dress codes that demand suits and ties; I suppose people who walk or take transit have the same problems about overheating. Perhaps you can keep the suit at the office or put it in your pannier. I wrote in an earlier post: