Quick Answer
Before the winter storms arrive, check your wiper blades, tire tread and pressure, brakes, lights, battery, and defogger. Do it now: NOAA expects a strong El Niño this winter, and the clocks fall back on Sunday, November 1, so evening commutes get darker just as roads get wetter.
Questions about your car? Call us or book online. Walk-ins are welcome.
Call (415) 440-5353Why now: El Niño and the end of daylight saving time
On October 8, NOAA's Climate Prediction Center issued an El Niño Advisory and said a strong-to-very-strong El Niño is likely through January to March 2027. A strong El Niño tilts the odds toward a wetter winter for California, but it doesn't guarantee any particular storm or amount of rain. It's a good reason to get your car ready now, not in the middle of the first big storm.
Daylight saving time also ends at 2 a.m. on Sunday, November 1. In San Francisco, sunset that day comes around 5:10 p.m., and by mid-November it's before 5 p.m. For many people, that means the drive home is in the dark, often on wet streets, with glare from every headlight.
The first real rain after a dry stretch is often the slipperiest. Oil and dust that have built up on the road surface mix with the water, and tires and brakes that are already worn have less margin for error.
The rainy-season checklist
| What to check | How to check it | Call a shop if |
|---|---|---|
| Wiper blades | Run them with washer fluid. Look for streaks, chatter, or split rubber. | New blades still smear, or the arms feel loose or bent. |
| Tires | Check tread depth with the penny test and check pressure when the tires are cold. | Tread is at or near 2/32 inch, there's uneven wear, or the car pulls to one side. |
| Brakes | Listen for squealing or grinding, and notice if the pedal feels soft or the car pulls when stopping. | You hear grinding, feel vibration, or the pedal has changed. |
| Lights | Check headlights, brake lights, and turn signals. Ask someone to watch from behind. | A bulb is out, or the headlights look dim or cloudy. |
| Battery | Notice slow cranking, dim lights at startup, or a battery older than about three years. | The engine cranks slowly or the dashboard lights flicker when you start. |
| Defogger and heater | Run the defrost setting with the A/C on and check how quickly the windshield clears. | The glass stays fogged, the air smells musty, or the heater blows cold. |
- How to check it
- Run them with washer fluid. Look for streaks, chatter, or split rubber.
- Call a shop if
- New blades still smear, or the arms feel loose or bent.
- How to check it
- Check tread depth with the penny test and check pressure when the tires are cold.
- Call a shop if
- Tread is at or near 2/32 inch, there's uneven wear, or the car pulls to one side.
- How to check it
- Listen for squealing or grinding, and notice if the pedal feels soft or the car pulls when stopping.
- Call a shop if
- You hear grinding, feel vibration, or the pedal has changed.
- How to check it
- Check headlights, brake lights, and turn signals. Ask someone to watch from behind.
- Call a shop if
- A bulb is out, or the headlights look dim or cloudy.
- How to check it
- Notice slow cranking, dim lights at startup, or a battery older than about three years.
- Call a shop if
- The engine cranks slowly or the dashboard lights flicker when you start.
- How to check it
- Run the defrost setting with the A/C on and check how quickly the windshield clears.
- Call a shop if
- The glass stays fogged, the air smells musty, or the heater blows cold.
Wipers and visibility
Most wiper blades last roughly six months to a year, and they wear faster after a long dry summer in the sun. If yours streak, skip, or chatter across the glass, replace them before the first storm. Top off your washer fluid too. Road spray in the rain uses more of it than you'd think.
Tires: tread and pressure
Tires are the only thing connecting your car to a wet road, and tread is what channels water away so the tire keeps its grip. A tire is generally considered worn out at 2/32 of an inch of tread (the wear bars molded into the groove mark that depth), and many tire makers suggest replacing tires before they get that low if you drive in the rain a lot. Check pressure at least once a month when the tires are cold. The correct pressure is on the sticker inside the driver's door.
If one tire is wearing faster than the others, or the car drifts to one side on a flat road, it may be an alignment problem. See our wheel alignment and tire service pages.
Brakes in the wet
Wet roads mean longer stopping distances, so brakes that are already worn matter more. Squealing, grinding, a soft pedal, or the car pulling to one side are all reasons to have them looked at before the rain starts, not after. San Francisco's hills make this more important. Downhill stops are harder on brakes, and worse in the wet. Learn more about our brake repair service.
Battery: cool, damp mornings and short trips
San Francisco's short trips and cool, damp weather are hard on batteries. Lots of starts and not much highway driving means less time for the battery to recharge, and corrosion on the terminals shortens its life. Most batteries last about three to five years. If yours is older than three years, a quick test now is cheaper than a dead battery on a dark, wet evening. At our shop, battery and charging system testing takes just a few minutes and doesn't need an appointment. See our battery service.
| Item | Typical range |
|---|---|
| Car battery replacement, installed | Roughly $150 to $400, depending on the battery type and vehicle |
| Cabin air filter replacement at a shop | About $60 to $130, including parts and labor |
- Typical range
- Roughly $150 to $400, depending on the battery type and vehicle
- Typical range
- About $60 to $130, including parts and labor
Many newer cars, especially those with start-stop systems, need a more expensive AGM battery. Exact prices depend on your make and model and on the nature of the issue.
Lights, defogging, and your cabin air
With darker evenings, a burned-out bulb or cloudy headlight lens makes a real difference to how well you see and how well other drivers see you. Walk around the car and check every light.
Foggy windows are a visibility problem, not just an annoyance. The fastest way to clear them is to run the defrost setting with the A/C on, because the A/C removes moisture from the air, and keep the climate control set to fresh air, not recirculation. If the windshield stays fogged, the air smells musty, or the heater only blows cold air, have the system checked. See our A/C and heating service.
Driving tips for the first rain
- Leave more room. Double your following distance on wet roads.
- Brake early and gently, especially going downhill.
- Slow down at the start of the storm, when the road is slickest.
- Turn your headlights on whenever you need your wipers.
- Never drive through standing water of unknown depth. Turn around and find another route.
Pack a small emergency kit
- A flashlight and a phone charger
- A portable jump starter or jumper cables
- A rain jacket or umbrella, and a towel
- A basic tire inflator or a way to check tire pressure
Frequently Asked Questions
How often should I replace my wiper blades?
Most wiper blades last roughly six months to a year. Replace them sooner if they streak, skip, chatter, or leave the glass hazy. A long dry summer in the sun wears the rubber down faster than you might expect.
How do I know if my tires are safe for wet roads?
Do a penny test: place a penny upside down in the tread with Lincoln's head pointing down. If you can see all of his head, the tread is at or below 2/32 inch, the point where a tire is considered worn out, and it needs replacing. Also check pressure monthly and look for uneven wear or cracks.
Does a weak battery matter more in the rainy season?
It can. Cool, damp mornings, short trips, and more use of wipers, lights, and defrost all put more demand on the battery. If your battery is more than about three years old, have it tested before the weather turns.
What's the fastest way to clear a fogged windshield?
Turn on the defrost setting, switch the A/C on, and set the climate control to fresh air instead of recirculation. The A/C removes moisture from the air, which clears the glass faster. If the glass keeps fogging, have the system checked.
Do I need an appointment to have my battery tested?
No. Battery and charging system testing only takes a few minutes and is available during business hours without an appointment. If you need a replacement, we can usually do it the same day.
Related Services
Brake Repair
Pads, rotors, calipers, and full brake system diagnostics.
Learn more →Tire Service
Mounting, balancing, rotation, alignments, replacements, and flat repair.
Learn more →Battery Service
Testing, replacement, and charging system checks.
Learn more →AC & Heating
A/C recharge, heater core repair, blower motor service, and climate control diagnostics.
Learn more →Wheel Alignment
Precision alignment for better handling and tire life.
Learn more →Need a Hand With Your Car?
Honest estimates, no work without your approval. Book online or call, and walk-ins are always welcome at 1165 Folsom Street, San Francisco, CA 94103.
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