Lawns, shrubs and perennials still need about an inch of rain a week. Rain gauges can be bought very cheaply. I found one for a dollar, but you can also make your own to measure the rain in your area. We've been getting enough rain where I am located, but I know some of you may be in areas where you aren't, so be sure to water if you receive less than an inch.
It's that time of year to dig up summer bulbs such as gladioli, dahlias, tuberous begonias, caladiums and cannas. I have an article on OFL with more information on storage: http://oldfashionedliving.com/corms.html
I've gotten lucky with glads for two years now and they've come back on their own. They are in a bed with mulch but no extra protection. I'm in Zone 5 so this has been a cool surprise. It doesn't hurt to give it a try if you don't have time to dig them up this year.
Garlic can be planted this month before the ground freezes. Plant it in full sun where the soil has been worked up deeply and it's fertile but not soggy. Organic matter such as leaf mold will give the garlic an extra boost. Separate the cloves from a head of garlic, then plant them 3 inches deep and 5-6 inches apart. The cloves should be planted with the pointed tips up. Cover and gently pat the soil over the cloves.
If time allows, fall is a great time to prepare garden and flower beds for next year. Remove annuals and vegetables from the beds as they finish blooming or harvesting is finished. Spread compost over the top of beds, even if it hasn't broken down all the way. This will help fertilize the bed over the winter.
Weeds can quickly take over especially with a few good rains, and warm temperatures. Take advantage of the cool fall days to pull weeds that have gotten out of control. This will cut back on the weeding that needs to be done in the spring and early summer.
October is one of my favorite months because of the colors, the fresh cool air, the fall blooms and the fragrance of autumn. I hope you're enjoying your fall days.