On one of the first nice warm days, I also like to take all my brushes and other grooming tools out and give them a good wash with a mild bleach solution, and leave them to dry in the sun - there's no point in bathing one of my horses and then grooming with dirty brushes! Pretty soon as well, I can take my rainsheets and winter blankets in for cleaning, rewaterproofing and repairs.
Pretty soon I'll be putting up the stall fans at the barn - our ventilation isn't all that good due to the poor window design, so we need stall fans for days when the temperatures in the barn get above 80.
I don't bathe my horses all that much - I like them to have the natural oils that make for a shiny, healthy coat, although I do rinse off if they get sweaty. Sometime soon, on a warm day, I'll give them a first bath using EQyss Micro-Tek medicated shampoo - it helps a lot with any crud or crusties that are left from the winter, particularly on the legs. I also bath manes and tails - I don't brush tails all winter and only start once they've been bathed in the spring. After that first bath, I usually don't bathe more than once a month, and then usually with Vetrolin Shampoo, which I think the horses find pleasantly bracing.
I need to order some fly spray and some mosquito spray, and check the fly masks to see if any need replacing - Norman the pony won't wear one so we can forget that! My truck and trailer are due to go in for their 6-month inspection, so I'll need to see to that next week.
Another feature of spring around here is spring thunderstorms. We usually get quite a few, and although they're usually not as severe as people in the central Great Plains get, we do on occasion get hail, high winds and even the occasional tornado warning. There's often a lot of lightening, and since our terrain is largely flat and treeless, lightening safety is important. Our barn has a lightening safety system involving lightening rods and insulated cables running to the ground. Although we don't bring the horses in for ordinary storms, even though there is some low risk that they could be injured by lightening, we do try if we can to bring them in if truly severe weather is coming - this happens a couple of times a year. One important rule, however, is that nobody should go out to get horses if conditions are already dangerous - the likelihood that the horses would be injured in the pastures is low and we don't want to put people at risk.
What are your spring chores and routines?