Weather Driving Safety Guide

Weather is a factor in nearly 22% of all vehicle crashes in the United States, according to the Federal Highway Administration. Rain, snow, ice, fog, and wind contribute to approximately 1.2 million weather-related accidents each year. The good news is that most weather-related accidents are preventable with proper preparation and adjusted driving behavior.

This guide covers how to drive safely in each type of hazardous weather, what to look out for, and when it's better to delay your trip. Use WeatherWeGo's route planner to check conditions before you depart, and review this guide to prepare for whatever weather you might encounter along the way.

Rain is the most common weather hazard for drivers. Wet pavement reduces tire traction, increases stopping distances, and can cause hydroplaning. Light rain is often more dangerous than heavy rain because it mixes with oil residue on the road surface, creating an especially slippery film — particularly in the first 10-15 minutes of rainfall.

Safe Driving Practices

• Reduce speed by at least 5-10 mph. On highways, consider dropping from 65 to 55 mph in moderate rain. In heavy rain, slow down further. Speed limits are set for ideal conditions — rain is not ideal.
• Increase following distance to 5-6 seconds (up from the standard 3 seconds). Wet roads can double your stopping distance.
• Turn on headlights. Most states legally require headlights when wipers are in use. Even in light rain, headlights make you visible to other drivers.
• Avoid cruise control. On wet roads, you need full control of your throttle to respond to changing traction conditions. Cruise control can cause wheels to spin faster if you hit a puddle.
• Stay in the middle lanes. Water tends to pool in the outer lanes near the road edges. The center lanes typically have better drainage.
• Brake gently and early. Sudden braking on wet pavement can cause skidding. Apply brakes earlier than you normally would and increase pressure gradually.

Understanding Hydroplaning

Hydroplaning occurs when a layer of water builds between your tires and the road surface, causing you to lose traction. It can happen at speeds as low as 35 mph, especially with worn tires. If you feel your steering become light or unresponsive:

• Don't brake suddenly or turn the steering wheel sharply
• Ease off the gas pedal gradually
• Steer straight or gently in the direction you need to go
• Wait for your tires to regain contact with the road

Snow and ice create some of the most dangerous driving conditions. Stopping distances on snow-covered roads can be 3-4 times longer than on dry pavement, and on ice, they can be 10 times longer. Black ice — a thin, nearly invisible layer of ice on the road — is particularly treacherous because drivers often don't realize it's there until they lose control.

Before You Drive

• Clear all snow and ice from your vehicle — windshield, rear window, mirrors, headlights, taillights, and the roof. Snow blowing off your roof is a hazard to other drivers and is illegal in many states.
• Check your tire condition. Consider winter tires if you regularly drive in snowy or icy conditions. All-season tires lose effectiveness below 45°F. Winter tires provide dramatically better grip in cold conditions.
• Fill your washer fluid with a winter-rated formula that won't freeze. Road spray and salt can quickly obscure your windshield.
• Check weather and road conditions using WeatherWeGo and your state's DOT website. Know what you're driving into before you leave.

Driving Techniques

• Reduce speed significantly. On packed snow, drive 50% slower than the speed limit. On ice, even slower. What feels safe may still be too fast for conditions.
• Accelerate and decelerate slowly. Gentle throttle and brake inputs are key to maintaining traction. Quick movements cause wheels to spin or lock.
• Increase following distance to 8-10 seconds. You need far more space to stop on snow and ice than on dry or wet roads.
• Don't stop going up a hill. Build momentum before the incline and let inertia carry you to the top. Stopping mid-hill on snow often means you can't get going again.
• Know how to handle a skid. If your rear wheels lose traction, steer gently into the direction the rear is sliding. If your front wheels lose traction, ease off the gas and wait for traction to return before steering.

Black Ice Warning Signs

Black ice forms when the temperature is at or below 32°F and there's moisture on the road. Watch for it especially:

• On bridges and overpasses (they freeze first because cold air circulates above and below)
• In shaded areas that don't get direct sunlight
• During early morning hours when temperatures drop to their lowest
• Near bodies of water where moisture levels are higher
• On intersections where exhaust and tire friction melt and refreeze ice

Fog reduces visibility dramatically and is one of the most disorienting conditions for drivers. Dense fog can reduce visibility to less than a quarter mile, making it extremely difficult to see other vehicles, road signs, and lane markings. Fog is a factor in hundreds of multi-vehicle pileups each year.

Essential Fog Driving Tips

• Use low-beam headlights or fog lights. Never use high beams in fog — the light reflects off water droplets and actually reduces your visibility further, creating a "white wall" effect.
• Slow down significantly. Your speed should match your visibility distance. If you can only see 100 feet ahead, you need to be going slowly enough to stop within that distance.
• Use the right edge of the road or lane markings as a guide. Follow the white line on the right side rather than the center line, so you don't drift toward oncoming traffic.
• Don't stop on the road. If visibility becomes too low to continue, pull completely off the road into a parking lot or rest area. If you must stop on the shoulder, pull as far over as possible and turn off your lights (so other drivers don't follow your taillights and rear-end you).
• Use your defroster. Fog creates moisture that condenses on your windshield. Run your front and rear defrosters to keep glass clear.
• Listen for traffic you can't see. Roll down your window at intersections to listen for approaching vehicles.

Strong winds — typically above 30-40 mph — can push your vehicle off course, make steering difficult, and blow debris onto the road. High-profile vehicles like SUVs, trucks, and vehicles towing trailers are especially vulnerable to crosswinds. Wind gusts can be unpredictable, especially when exiting tunnels, crossing bridges, or driving through mountain passes where terrain funnels wind.

Driving Tips for Windy Conditions

• Keep both hands on the wheel and maintain a firm grip. Sudden gusts can jerk the steering wheel unexpectedly.
• Reduce speed. Lower speeds give you more control and more time to react to gusts. This is especially important for high-profile vehicles.
• Anticipate gusts when passing large vehicles, crossing bridges, exiting tunnels, or driving through gaps in terrain or buildings. These transitions often come with sudden wind changes.
• Watch for debris. High winds can blow branches, signs, trash, and other objects onto the road. Maintain a safe following distance so you have time to avoid obstacles.
• Be cautious around semi-trucks. Large trucks create significant air turbulence when you pass them, and they're also more susceptible to being blown into adjacent lanes.

Thunderstorms combine multiple hazards: heavy rain, gusty winds, lightning, hail, and the potential for flash flooding and tornadoes. Severe thunderstorms can develop quickly and produce conditions that make driving extremely dangerous.

During a Thunderstorm

• Pull over if conditions become severe. If rain is so heavy that you can't see the vehicle ahead of you, find a safe place to stop and wait. A sturdy building or covered parking structure is ideal.
• Avoid flooded roads. Never drive through standing water. Just 6 inches of moving water can knock you down, and 12 inches can float most vehicles. A foot of water on the road can carry away an SUV.
• Stay in your vehicle during lightning. Your car's metal frame provides protection from lightning strikes (not the tires, as commonly believed). Avoid touching metal parts of the vehicle interior.
• Watch for hail. If hail starts, pull under an overpass or into a covered area if safely possible. Hail can crack windshields and damage vehicles. If you can't find cover, stop the car and face away from the hail to protect the windshield.
• Be alert for tornadoes. If you see a tornado or hear a tornado warning, do not try to outrun it. Leave your vehicle and seek shelter in a sturdy building. If no building is available, lie flat in a low-lying area like a ditch, away from the car.

Extreme heat — temperatures above 100°F — puts stress on both your vehicle and your body. Heat-related breakdowns are common in summer, and desert highways can be especially dangerous if your vehicle overheats far from services.

Vehicle Preparation

• Check your cooling system. Ensure coolant levels are full, hoses are in good condition, and your radiator is functioning properly. Overheating is the most common heat-related breakdown.
• Check tire pressure. Hot pavement causes tire pressure to increase. Over-inflated tires have a higher risk of blowout. Check pressure when tires are cold (before driving) and fill to the manufacturer's recommended level, not the maximum listed on the tire.
• Test your air conditioning before a long trip. A/C failure in extreme heat isn't just uncomfortable — it can lead to heat exhaustion.
• Carry extra water — at least one gallon per person. In case of a breakdown in extreme heat, hydration is critical while waiting for help.

Driver Safety

• Stay hydrated — drink water regularly even if you don't feel thirsty
• Take breaks every 2 hours in air conditioning
• Wear sunglasses to reduce glare and eye fatigue
• Never leave children or pets in a parked vehicle, even briefly — interior temperatures can reach 150°F
• Watch for signs of heat exhaustion: dizziness, nausea, headache, excessive sweating

Flash flooding can occur with little warning, especially in low-lying areas, near rivers and streams, and in urban areas with poor drainage. Even if the water looks shallow, the road beneath it may be washed out or compromised.

Critical Rules

• Never drive through standing water if you can't see the road surface beneath it. What looks like a shallow puddle might be several feet deep.
• 6 inches of water can reach the bottom of most passenger vehicles, causing loss of control and potential stalling.
• 12 inches of water can float many vehicles.
• 18-24 inches of moving water can carry away most vehicles, including SUVs and trucks.
• If your car stalls in rising water, abandon the vehicle immediately and move to higher ground. Do not try to restart it.

Regardless of the season, keeping an emergency kit in your vehicle can be the difference between an inconvenience and a dangerous situation. Here's what to carry: