What the first answer means
GO means the complete selected block is a good weather fit for an open-air film: the hours are suitably late, the measured rain signal stays below the activity’s caution limits, and wind, temperature and severe-weather checks do not force the result lower. WAIT means the block is mixed or another evening window is meaningfully better. NOT TODAY means a serious weather signal or a poor full-window fit makes the plan unreliable.
The result card stays deliberately simple: verdict, activity, best practical window and one memorable explanation. Open the forecast details when you want the supporting rain, wind and temperature facts. GoodDayTo applies the same rule on this page, in activity rankings, in the natural-language Planner and for saved routines.
How the Outdoor Cinema score works
An outdoor movie is not just an ordinary evening outside. People are usually seated and relatively still for a long time, so a temperature that feels comfortable while walking can feel cold after an hour on a chair or blanket. The model therefore looks at apparent temperature, rain probability, measured precipitation, average wind, gusts, severe-weather codes and time of day. Daytime is deliberately a poor fit because most outdoor screens need dusk or darkness.
The score evaluates every forecast hour in the selected block. It does not choose one pleasant arrival hour and ignore the weather during the film. The one-, three- and five-hour choices are real duration checks: one hour suits a short event check, three hours covers many arrival-and-film plans, and five hours can cover a longer programme. A requested duration is not silently shortened just to produce a better answer.
- Complete selected block
- Rain probability
- Measured precipitation
- Seated evening comfort
- Wind & gusts
- Severe-weather signals
- Time of day
Rain limits for the whole screening
Rain during the final scenes matters just as much as rain at the start. GoodDayTo adds the rain amounts across the selected window and also checks the highest hourly precipitation probability. If the block contains at least 0.5 mm total rain, or any selected hour reaches 70% rain probability, the result is capped at NOT TODAY (45). If it contains at least 0.1 mm, or any hour reaches 40%, it is capped at WAIT (70). These are conservative planning guardrails, not a claim that every venue uses the same cancellation threshold.
Probability and amount answer different questions. The US National Weather Service explains that precipitation probability is the chance of measurable precipitation at the forecast point; it is not the percentage of the evening that will be wet. GoodDayTo keeps both signals visible because a small predicted amount with meaningful uncertainty still matters to an unsheltered audience and screen. Read the official NWS precipitation-probability explanation for more context.
A practical example
Suppose 19:00 and 20:00 are dry and mild, but the 21:00 forecast rises to 72% rain probability. A simple average can make that three-hour evening look acceptable because two hours are good. The cinema limit instead caps the complete block at NOT TODAY: a likely shower in the final hour can interrupt the same film. If that final hour were 45% with no measured rain, the block would be WAIT. If all three hours stayed below 40%, with no meaningful forecast rain and otherwise comfortable conditions, the rain rule would not prevent GO.
Wind, temperature and darkness still matter
A dry screening can still be uncomfortable. Strong average wind or gusts can move blankets, cool a seated audience and affect temporary equipment. GoodDayTo measures those conditions but cannot know a particular screen’s engineering limit. Apparent temperature is used as a practical comfort input, not a promise that everyone will feel warm enough. Clothing, seating, shelter, age, health and personal cold tolerance remain individual checks.
The activity model prefers evening and night hours because those are normally usable for projection. It does not calculate a venue’s precise screen brightness, tree shade or local horizon, and it does not know the advertised start time. If you need a fixed start, ask the Planner for the real date, start hour and duration, then compare the returned weather block with the event listing.
Safety and organiser decisions come first
GoodDayTo does not override an official warning, venue instruction or cancellation. Thunderstorms cap the weather result independently of the rain-window calculation. The National Weather Service recommends that organised outdoor activities have a lightning safety plan and a substantial safe shelter; an open-sided tent is not a safe lightning shelter. See the NWS outdoor activity lightning guidance.
Before travelling, check the organiser’s event page, ticket message or social update. The organiser may have stricter wind, lightning or surface rules, and may move the screening indoors even when the general weather is manageable. If thunder is heard or authorities tell people to shelter, follow that advice rather than the score.
Assumptions and limitations
The forecast is hourly and location based, so small local showers can differ from the forecast point and conditions can change after the result loads. GoodDayTo does not know whether the seating area is covered, how exposed the screen is, whether blankets or chairs are supplied, whether the ground is already wet, or whether parking and accessible routes remain usable.
It also cannot confirm tickets, age restrictions, food service, noise rules, toilets, accessibility arrangements, pets, drive-in audio, opening hours or event cancellation. A drive-in can use the weather result, but a vehicle changes exposure to wind and temperature. Use the score as a weather-planning layer and combine it with the venue’s latest information and your own needs.
Frequently asked questions
How does GoodDayTo check rain across an outdoor movie?
It checks every forecast hour in the selected one-, three- or five-hour block. At least 0.5 mm total rain or a 70% hourly rain probability caps the result at NOT TODAY; at least 0.1 mm or 40% caps it at WAIT.
Why can a mild evening still score WAIT?
A smaller rain signal, gusty wind or an uncomfortable seated temperature can make a long screening a mixed plan even when the headline temperature looks pleasant.
Why are daytime hours a poor fit?
Most outdoor screens need dusk or darkness, so the activity model penalizes daytime hours instead of promoting a sunny afternoon that may not be usable.
Does GO mean the screening will happen?
No. GO only describes the measured weather fit. The organiser controls schedules, cancellations, screen limits, tickets and venue rules.
Which duration should I choose?
Use one hour for a short event check, three hours for a typical arrival-and-film block, or five hours for a longer programme. Choose the option that covers the time you expect to be outside.
Can I use this for a drive-in movie?
Yes as a weather guide, but a vehicle can change how temperature and wind affect you. The venue’s operating rules and cancellation decision still take priority.