I ride most days and I've only had 3 or more days off cycling in a row 3 times in the last 4 years.
My longest enforced absence during that time was for 7 days last year when I was trapped in Wales without a bike during the 'beast from the east' snow storms. That drove me totally stir crazy, normally after 1 day off I'm itching to get back cycling again.
Also I don't know if it's psychological or because I'm in my mid/late 40's now, but it feels like my leg muscles atrohpy after 3 days, and us humans seem to be able to lose fitness a lot faster than we gain it, so maybe that acts as an extra incentive to get back out again sharpish.
I don't own any proper waterproofs or winter riding gear, so am not a big fan of riding in grim conditions, but riding in grim conditions is still preferable to no riding at all, for me at least. And as soon as the clocks change to British summer time those extra daylight hours just encourage me to cycle more.