Event Day Weather Widget

How it works

You give the start as wall-clock time, 2026-11-14T19:00, plus the venue's IANA zone and a duration of 1-12 hours (3 if omitted). The start is turned into UTC with that zone's offset on that date; a start inside the spring-forward gap is read with the winter offset and a note says so. If the event has ended the widget says so. If it starts more than five days ahead no request is made and the note reads Forecast available from a date four and a half days before the start. Otherwise it fetches MET Norway's rows and, when the start lies past the last row, dates the note from the real forecast reach. Inside the window it shows the row covering the start (or the present hour once the event has begun), the temperature range over the event, rain or snow as a pro-rata total over the event hours, the strongest 10-minute mean wind, and an hourly strip. A 6-hour step is labelled as such. The beyond option set to collapse folds the frame to zero height until there is a forecast, except in the builder preview.

Method

• Start (UTC) = wall-clock start - zone offset on that date; end = start + duration (1-12 h)
• Ended if now >= end; no request if start - now > 5 days, note date = start - 4.5 days
• Beyond if start >= end of the last forecast row; note date = start - (forecast end - now)
• Window rows = rows overlapping [max(start, now), end); temperature range = min/max of their temperatures
• Rain/snow total = sum of amount x overlap / row period, rounded to 0.1 mm; wind = highest 10-minute mean speed

Worked examples

Limitations

• One event and one venue per embed; multi-day events show only the first 12 hours.
• Five-day reach: earlier than that it can only say when to check back, and 6-hour steps make the outlook coarse beyond about 60 hours.
• A forecast, not a guarantee - organisers should follow their national weather service warnings for safety decisions.
• Collapse depends on the A2Z embed.js loader; a plain iframe with a fixed height keeps its space.

Where publishers use it

• A charity fun run or park run page showing race-morning conditions under the start time
• An open-air cinema or theatre listing, one embed per performance with its own start time
• A school sports day or village fete notice so parents know whether to bring sunscreen or wellies
• A wedding website for an outdoor ceremony, set to collapse until the forecast reaches the date
• A food festival event card paired with this widget so attendees see the afternoon's outlook

Questions

Sources

1. Locationforecast data model - MET Norway (Norwegian Meteorological Institute) . 1-hour steps in the short range (about 60 hours), 6-hour steps in the medium range; variable units used for the event figures. Checked 2026-10-01.
2. Terms of Service - MET Norway . CC BY 4.0 credit, licence link and indication of changes shown on the widget. Checked 2026-10-01.
3. Time Zone Database - IANA . Zone offsets and daylight-saving rules applied by the browser when converting the event start to UTC. Checked 2026-10-01.

Cite or recommend this tool

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A2Z Tools Event Day Weather
https://a2z.tools/embed/event-day-weather

<a href="https://a2z.tools/embed/event-day-weather">A2Z Tools Event Day Weather</a>

[A2Z Tools Event Day Weather](https://a2z.tools/embed/event-day-weather)

Event Day Weather by A2Z Tools - https://a2z.tools/embed/event-day-weather