116 Days Over 100 Degrees: A Pinal County Golf Cart Maintenance Calendar

September 23, 2026

Casa Grande Golf Cart Repair gets asked one question more than any other after “how much”: what should I actually be doing to this cart, and when? Here is the answer for Pinal County specifically. The short version: water flooded batteries every two to four weeks from roughly April through October, clean and coat the terminals before the worst heat hits, check brakes and tires every year because of desert dust, charge to full and disconnect before leaving for the summer, and load-test the pack in October before the season picks back up. The long version follows, month by month, with the reasons.

The two things that wear out a Pinal County cart

Heat, at a scale most climates do not see. NOAA’s 1991 to 2020 climate normals for the Casa Grande station put the June average high at 105.8°F and July at 106.8°F, and count 116.8 days a year at 100°F or above, out of 183.8 days a year at 90°F or above. That is not a hot stretch. That is roughly four months where the daytime high rarely drops under 100, and it is hotter here than at several of the neighboring stations we checked: Eloy runs even hotter, at 107.2°F in July with 122.3 days a year over 100, while Florence runs a shade milder at 91.6 days a year over 100. Wherever you are in this corridor, the same mechanism applies: heat evaporates water out of a flooded lead-acid battery’s electrolyte, and once the plates are exposed they sulfate and permanently lose capacity. Heat also raises self-discharge, so a cart that sits three or four weeks in a closed garage in July comes back weaker than it left. This is why a pack rated for five or six years elsewhere routinely runs out at three here without a watering schedule.

Desert dust. Pinal County sits inside the stretch of Arizona where haboobs, fast-moving dust walls with winds that can run 22 to 62 mph and stretch dozens of miles wide, are a recognized summer hazard, arriving with little warning. Between storms, ordinary blowing dust and the unpaved lot edges common around newer subdivisions and RV resorts work fine grit into brake drums and bearings continuously. Brakes and tires on a cart that lives near any of that need a yearly look, not a three-yearly one.

October through December

Snowbird season begins in earnest, and this is the month the summer’s neglect shows up. Communities like Robson Ranch, Palm Creek, and Anthem at Merrill Ranch fill back up with returning residents, and every one of them finds out what the summer did to a cart that sat.

• Returning residents: load test before the first long ride. A pack that sat through 116.8 days a year of 100°F-plus heat is either fine or sulfated, and there is no way to tell from the outside. The sat all summer page covers the recovery attempt.
• Full tune-up if you did not do one before leaving in the spring. Load test every battery, hydrometer every cell on flooded packs, clean and coat terminals, check charger output, brakes, tires, lights.
• Brake and tire inspection. A summer of sitting in the sun cracks sidewalls even on a cart that did not move, and dust accumulated over months needs cleaning out of the drums.

January and February

Peak riding season across the resort communities, and the mildest weather of the year. Even the coldest Pinal County station we checked, Arizona City, only averages a 34.1°F January low, so cold is not the battery problem here the way it is in a genuinely cold climate. It does mean a cool morning reveals the weakest battery in a string first.

• Charge after every use; do not let the pack sit partial.
• Check water every six to eight weeks through the cool season.
• If you are planning to leave for the summer later in the year, note it now so a pre-storage tune-up gets booked in time.

March and April

The last comfortable months before the heat builds. Use them.

• Full tune-up if you have not had one this season. Load test, hydrometer check, terminal service, charger output, brakes, tires, lights.
• Seasonal residents preparing to leave: charge to full, top the water, coat the terminals, set tire pressures, disconnect the main negative cable or arrange a monthly charge through the summer.
• Brake and tire inspection. Catch anything the winter’s mileage wore down before the cart sits idle.

May through September

The stretch that does the damage. This is when the Casa Grande station’s 116.8 days a year at 100°F or above are concentrated.

• Water every two to four weeks. The single most valuable line on this calendar, for any cart still in regular use.
• Terminals. Check monthly for crust; heat-cycled connections corrode even without humidity.
• If the cart is parked for the summer, do not just walk away. A pack left at partial charge through this stretch is close to the worst thing you can do to lead-acid. Charge fully first, and arrange a monthly top-off if at all possible.
• Monsoon storms. Between the dust and the outages, unplug the charger ahead of forecast storms so it does not take a surge when power returns, and if the cart is anywhere near flood-prone ground, move it to higher ground before a storm.
• Do not park in direct sun if you can help it. Tires crack and battery compartments run even hotter than the surrounding air.

If your cart is the one sitting through summer right now, our post on snowbird storage goes deeper on exactly why this climate is so hard on a parked pack and what actually prevents it.

The whole year on one line

Water on schedule through the hot months, charge fully and disconnect before you leave for summer, check brakes and tires at least once a year because of the dust, and load-test in October before the season gets busy. Every price on this site is on the pricing page, and the tune-up that covers most of this list is $100 to $200 for an electric cart.