How to read an hour-by-hour weather graph
Read a weather graph from left to right, combine only the layers that affect your decision, and find the hours when conditions work for you.
Read the guideWeathergraph guides
Understand the forecast. Find the useful hours.
Weather is easier to use when every number answers a question. These guides explain the graph, the source, and the uncertainty—then help you turn them into a plan.
Read the forecast
Which view answers which question, and how to match it to the place and time your plan actually happens.
Nowcast vs. radar vs. hourly forecast: what is the difference?
Radar shows recent precipitation, nowcasting projects the immediate future, and an hourly model forecast looks farther ahead. Use each for the question it can answer.
Read the guideWill it rain when you arrive? Check weather for your destination
Match an hourly forecast to the place, local time and duration that matter—whether you are walking home from a station, visiting the mountains or checking somewhere far away.
Read the guideWhat the numbers mean
Feels-like, dew point and gusts: what each one measures, and what it lets you predict.
What "feels like" temperature actually measures
Feels-like is a measure of you, not the air. Your body sheds heat constantly; wind carries that heat away faster, and humidity stops sweat evaporating. That is why the same reading can feel completely different on two days.
Read the guideDew point vs. humidity: how muggy will it feel?
Dew point gives a steadier read of moisture in the air than relative humidity. Learn how to use it to plan a hot day, without mistaking it for a heat-safety rating.
Read the guideWhy clear, calm nights so often end in fog
Fog is a cloud that forms where it stands. On a clear, still night the ground radiates heat to space, the air just above it cools to its dew point, and the moisture it was holding condenses in place.
Read the guideWind gusts vs average wind: read both before making plans
Sustained wind describes the average; gusts describe brief stronger bursts. Compare both across the hours of a tennis booking, picnic or other outdoor plan.
Read the guideWhy forecasts change
Where the uncertainty comes from, and what to make of two apps that disagree.
Why weather forecasts disagree—and how to choose a source
Weather apps can disagree because they begin with different observations, models, update cycles, and processing. Compare sources against the weather decisions that matter where you live.
Read the guideWhy next week's forecast keeps changing
Tiny errors in today's measurements grow fast in a swirling atmosphere. Forecasters run the same forecast many times from slightly different starting points—the runs agree for a day or two, then fan apart.
Read the guidePlan an activity
Find the hours that work for a run, a ride, a summit, a session or a shot.
Picking the best hour of the day to run
The best running hour is rarely the warmest one. Read temperature, dew point, rain timing and UV as one timeline, and the comfortable window usually picks itself.
Read the guidePlanning a road ride around wind and rain timing
Wind direction decides where a ride hurts, and rain timing decides whether it happens. Read both on one timeline and plan the loop so the tailwind lands on the tired half.
Read the guideChoosing the day for a mountain hike
A mountain day is decided by cloud base, wind on the ridge and when the weather turns—not by the valley temperature. Read the whole day as a timeline before you commit.
Read the guideReading the forecast before a ski day
The freezing level decides whether new snow is powder or rain, wind decides whether the lifts run, and cloud decides whether you can see. Read all three as one timeline.
Read the guideReading a wind forecast for kitesurfing and sailing
Average wind tells you whether to go, gusts tell you which kite, and direction tells you whether the spot works at all. Read the three together on one hourly timeline.
Read the guideForecasting the light: golden hour, cloud and clear breaks
Good light is a cloud forecast, not a sunset time. Learn which cloud conditions make a sunset and how to find the clear break in the hours before it.
Read the guideHow to find a clear-sky window for stargazing
A cloudy evening can change. Follow the cloud forecast through the hours you can observe, then consider darkness, the Moon and nearby lights.
Read the guideHow to read wind direction at your campsite
Translate a compass direction into the side of your camper the wind meets, then read speed, gusts and changes across the hours you will be there.
Read the guideWeather at home
Ventilation, humidity and the decisions you make from indoors.
Will opening the windows make your home less humid?
Compare indoor and outdoor dew point to understand whether ventilation can remove moisture, then check temperature separately if you also want to cool the room.
Read the guideWhen should you ventilate a cellar? Check dew point and cold walls
Fresh summer air can leave a cold cellar wetter. Learn the two comparisons that separate moisture removal from condensation on walls and floors.
Read the guideWeather and migraine: track pressure alongside a headache diary
Keep a weather forecast and your symptom record separate, include headache-free days, and use the notes to discuss possible patterns with your clinician.
Read the guideSet up Weathergraph
The layouts and complications that put the forecast where you already look.
Weathergraph: the whole forecast at a glance
See hours and days as one visual timeline, keep the forecast close on iPhone and Apple Watch, and choose the detail and sources that matter to you.
Read the guideMissing Dark Sky? Set up Weathergraph's vertical layout
Dark Sky's vertical hour-by-hour timeline is the part people still miss. Weathergraph has the same shape in its vertical layout—here is how to switch it on, what matches, and what genuinely does not.
Read the guideApple Watch weather complications: choose a useful glance
Choose an Apple Watch weather complication around the decision you make most often, understand how updates work, and know when stale data needs attention.
Read the guide
Weathergraph
Keep the whole forecast understandable
Weathergraph puts temperature, rain, wind, sunshine, clouds, dew point, and more on one hourly timeline—so you can use what you learned here when it is time to make a plan.
