Thunderstorms, tread and tire work in Savannah

Savannah does not have a storm season and a separate hot season. It has one four-month block that is both, and that single fact decides two different things: when a wet road is most likely to be under you, and when an outdoor job is least likely to run to plan.

The measurement

The daily observation record at Savannah/Hilton Head International carries an observer-coded thunder flag. Counted over the eleven years 2015 to 2025, that station averages 68.8 thunder days a year, ranging from 57 to 83. By month, as a mean over those eleven years:

	Thunder days		Thunder days
January	0.7	July	16.8
February	1.2	August	14.4
March	3.5	September	5.8
April	3.6	October	1.2
May	7.0	November	0.8
June	12.8	December	1.0

July averages 16.8 thunder days. More than one day in two.

That flag records thunder reported at the airport, not lightning counted over the metro, so treat it as a good measure of how often a storm is at that station and not as a strike count for your street.

The rain that comes with it is in the 1991-2020 normals for the same station: 47.96 inches a year, across 108.2 days with at least 0.01 inch, 70.3 with at least a tenth, 31.3 with at least half an inch, and 14.0 days a year delivering an inch or more. August is the wettest month at 6.56 inches.

And the two seasons sit on top of each other. June, July, August and September hold 22.69 inches of the annual normal — 5.95 plus 5.60 plus 6.56 plus 4.58 — which is 47.3 percent of the 47.96-inch annual total. The same four months hold 49.8 of the 68.8 mean annual thunder days: 12.8 plus 16.8 plus 14.4 plus 5.8. Both of those are derived, and both inputs are printed here so you can check them.

For scale, the wettest single day in the station's complete record from 1948 onward is 8.94 inches on 7 October 2016, and the highest peak gust in the record since 1996 is 81.0 mph on 25 April 2015. We are giving you the dates and the measurements and not the storm names, because we did not open a National Hurricane Center or Weather Service report for any of them and we are not going to attribute a date to a storm from memory.

What that does to a booking

This is the part nobody advertises. A mobile tire service works outdoors, at a kerb or on a driveway, with a wheel off a car. In June, July and August in Savannah the afternoon is the least reliable part of the working day, and no operator can promise otherwise.

At least one competitor is straight about it. GoMobile Tires' own Savannah FAQ, read 2026-09-20: "Our technicians work in all weather. In extreme conditions we'll contact you to reschedule at no charge."

Ours is the same answer in different words. If weather makes a visit unsafe we move it rather than working through it, and a visit that does not happen is not charged. We would rather reschedule than have somebody kneeling beside a jacked car with thunder overhead. Tire Rack's published mobile requirements make the general point for the whole trade — the job needs "a flat, paved surface with 6 feet of clearance around your vehicle", "10 feet of vertical clearance", and "We cannot install in open traffic" — and none of those get easier in a downpour.

Two practical consequences worth knowing when you book in summer:

• Morning slots are the reliable ones in June, July and August, on those monthly counts.
• Covered is not the same as usable. A carport or a deck usually fails the ten-foot vertical clearance test, so the shelter that would help most is often the one we cannot work under. Tell us what you have and we will say before we set off. How to prepare for a mobile tire visit covers the rest.

What that does to the road

Fourteen days a year of an inch or more, and 31.3 days of half an inch or more, is a lot of water arriving fast on flat ground.

The only part of that you control is tread depth, and Georgia is unusually precise about how to measure it. O.C.G.A. 40-8-74(e)(1) requires "not less than 2/32 inch tread measurable in all major grooves", and adds that "such measurements shall not be made where tie bars, humps, or fillets are located". Three things follow from those two clauses:

1. All major grooves, not the deepest one. A tire worn on its inner edge — the classic alignment wear — reads fine in the centre groove and can be under the line where you cannot see without turning the wheel.
2. Not on the tie bars. Those raised strips moulded across the groove floor are wear indicators and they sit higher than the groove. A gauge on one gives a number the statute itself says does not count.
3. Use a gauge. 2/32 of an inch is about two credit cards thick. Eyes are no use at that scale.

The figure is live law rather than a guideline. The annotations to that section carry Ga. DOT v. Heller, 285 Ga. 262, 674 S.E.2d 914 (2009), recording that a city employee "did nothing to verify whether the taxi's badly worn tires had the legally required minimum amount of 2/32 inch of tread on the tires under O.C.G.A. Sec. 40-8-74(e)(1)" and had no "discretion" to ignore it. The decedent was killed when that taxi spun out on a rain-slick road. It is a Georgia case about worn tires and a wet road, and it is on the record.

And remember that the same subsection has two more limbs, either of which fails a tire on its own: no cut, break or snag "deep enough to expose body cord" on tread or sidewall, and no "bumps, bulges, or separations". Georgia's tread law in full covers the section end to end, and a 30-day inspection notice in Savannah covers what happens when an officer measures it before you do.

The heat half of the same season

June to September is also when the tire is working hardest. The 1991-2020 normals at that station give 70.0 days a year at or above 90F, of which 63.0 fall in those four months — 15.6 in June, 22.6 in July, 18.1 in August and 6.7 in September. July's normal daily high is 92.4F and its normal daily low is 72.8F.

Then the part Savannah has that a dry-heat metro does not. Measured at the same station over 2006 to 2024, August's mean relative humidity is 76.9 percent and August's mean dew point is 72.8F, and 49.0 days a year are both at or above 90F and at or above 70 percent relative humidity — derived from 921 qualifying days among the 6,871 days in that window carrying both observations. Seven weeks a year of over-90F at over-70-percent humidity. That is the condition the work actually happens in, and it is why a summer afternoon slot is a harder promise here than the temperature alone suggests.

This is not the Dallas story, incidentally, and it is worth saying so because the advice that travels from there does not apply. Savannah gets 1.8 days a year at or above 100F against DFW's 14.6 — but more days above 70F. It is a long climate rather than a peaky one, and in Dallas August is the driest month while here it is the wettest.

And there is no winter half at all

Whatever you have read about seasonal tires, it is not a Savannah subject.

The normals give 0.3 inches of snow a year, 22.3 nights below 32F and 1.2 nights below 20F, with January's normal high at 60.4F. December through March hold 13.16 of the year's 47.96 inches of rain — 2.95 plus 3.69 plus 2.79 plus 3.73 — the quietest stretch of the year, and 4.4 of the 68.8 mean thunder days.

No freeze-thaw cycle worth the name, no salt truck, no changeover season. Anything anyone tells you about winter tires in this city is about a market that is not here. For completeness, Georgia's statute does address studs: 40-8-74(c)(2) permits "tires equipped with safety metal spike studs upon any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid", while a 1968 Attorney General opinion printed in the same section's annotations states that a "Studded tire is a metal tire within the meaning of O.C.G.A. Sec. 40-8-74 and may not be used on vehicles operated in this state." Two published sources, both dated, saying different things. We report both and stop, and at 0.3 inches of snow a year it is a curiosity here rather than a decision.

What we do about it

We measure the tread in every major groove on all four tires and the spare at every visit and tell you the numbers rather than a verdict. We check the other two limbs at the same time. If a storm makes the visit unsafe we move it and do not charge for a visit that did not happen.

If a tire has to be replaced we supply and fit it at the same address on the same visit; we do not mount tires bought elsewhere and we do not sell used tires. When to replace your tires covers the decision, find your tire size covers what you would be buying, replace two or four covers how many, and what mobile tire replacement costs covers the money.

Our price: $145, and $50 for each extra tire

A mobile puncture repair is $145 for the first tire and $50 for each additional tire in the same visit. That is the price, not an estimate and not a starting figure. It covers getting to you, the wheel off, the tire demounted and inspected from the inside, a plug and patch fitted the way the tire industry requires, remounting, rebalancing, a TPMS reset where the vehicle supports it, and the wheel back on. There is no separate call-out fee. If the damage turns out not to be repairable, we tell you on the spot: the inspection is charged and the repair is not.

Where to go next

Mobile tire repair in Savannah covers the visit, flat tire repair in Savannah covers the tire that is already down, a nail in your tire covers punctures, slow leak tire repair covers the gradual kind, tire repair available now covers today, and what tire repair costs in Savannah covers every published local number we could find. Tidal flooding and tire damage covers water that arrives with the tide rather than the sky, tire service in the Historic District covers the hardest place to work, and our Savannah service area covers where we come.

Questions people ask

• How often does it storm here? The airport station averaged 68.8 thunder days a year over 2015 to 2025, with 16.8 of them in July, 14.4 in August and 12.8 in June.
• Will weather cancel my appointment? It can. If a visit is unsafe we move it rather than working through it, and a visit that does not take place is not charged. Morning slots are the more reliable ones in high summer.
• How much rain does Savannah get? 47.96 inches a year on the 1991-2020 normals, across 108.2 days with measurable rain and 14.0 days delivering an inch or more. August is the wettest month at 6.56 inches.
• What tread depth do I need for wet roads? Georgia's legal floor is 2/32 inch in all major grooves under 40-8-74(e)(1), measured away from tie bars, humps and fillets. That is a minimum set by statute, not a recommendation, and it is the number a Georgia court read literally in a case about a wet-road crash.
• Do I need winter tires in Savannah? The normal is 0.3 inches of snow a year and 22.3 nights below freezing. There is no changeover season here.
• Can you work under my carport during a storm? Usually not. Mobile fitting needs about ten feet of vertical clearance, which most carports and decks do not give.
• Is a summer afternoon a bad time to book? On those monthly counts, it is the least reliable part of the day in June, July and August. Book a morning if the timing matters.