Unless you just have light dust, like from a day or two of exposure, you should stick with a real washing.

But with light dust, provided the temperature is at least 50 degrees or so, you can use a mist & wipe product like Meguiar's Ultimate Quik Detailer or similar from Mother's, Zaino, Adam's, etc. I do this all the time here in SoCal because we can go 9 months at a time without rain. I may go a month without washing my daily driver but will do a quick detail spray wipe down 3 or 4 times a week. Using quality microfiber towels you reduce the chance of inflicting swirls to almost nil. Don't believe me? Read THIS post I made over at the Meguiar's discussion forum almost a year ago.

If you've got a clear day but your temperatures more of a mid-west-normal-for-February 35 degrees, then a California duster is about your only choice for removing light dust. But a very light touch is critical with this type of duster, never even come close to "scubbing" the paint with one.