Frequently asked questions
How is the weather calculated for each leg of the route?
The tool traces the real driving route (OSRM engine on OpenStreetMap), splits it into 6-10 equidistant points and estimates the time you will pass each one based on the trip duration and the chosen departure time. It then queries the Open-Meteo hourly forecast for each point exactly at that time of passage, not at the current time.
Which warnings does the tool show?
Legs are flagged in amber or red for heavy rain (more than 4 mm/h), wind gusts above 60 km/h, visibility below 200 m (dense fog), forecast snow and ice risk (temperature at or below 0 °C with precipitation). The summary at the top shows the overall risk of the trip and the worst leg.
How accurate is the forecast along the route?
Open-Meteo's hourly forecast blends the best available models for each area with a resolution of 1 to 11 km. It is very reliable at 24-48 hours, although local phenomena such as fog banks or convective storms can vary within a few kilometres. The time of passage is an estimate without traffic: add a margin at peak hours.
Does it work for any route in Spain or Europe?
Yes. The city search and the forecast work worldwide, and the driving-route calculation covers the whole OpenStreetMap network (Spain, Portugal, France and the rest of Europe included). If the routing server does not respond, a clearly labelled straight-line estimate is shown.
Planning a road trip around the weather
Checking the weather only at the origin and the destination is a common mistake: on a 6-hour Madrid–Barcelona drive you can leave under sunshine, cross fog in the Ebro valley and arrive with 80 km/h winds. This tool solves that problem by calculating the forecast for the place and the time you will actually be there.
The five weather hazards behind the wheel
Heavy rain (more than 4 mm/h) reduces grip and multiplies braking distance; above 10 mm/h there is a risk of aquaplaning. Wind gusts above 60 km/h destabilise vans, trailers and motorbikes, especially on viaducts and at tunnel exits. Dense fog with visibility below 200 m forces you to slow down drastically and use fog lights. Snow may require chains or winter tyres, and ice — precipitation with temperatures of 0 °C or below — is the most treacherous because it is barely visible on the tarmac.
Practical tips
If a leg shows in red, consider delaying your departure: shifting the trip by 2-3 hours is often enough to dodge a front. Check the forecast the day before and again before setting off, check the actual state of the roads with the traffic authority and keep a full tank during snow episodes. Remember that the time of passage is calculated without traffic or stops: on busy travel days, add a margin.