Quick answer: Rio De Janeiro sits at 22.9° S and gets about 12 h 7 min of daylight today, with the sun 67° up at solar noon. The panel above scores each upcoming day 0–100 and returns a direct go, wait or skip verdict.
Conditions on this page are recalculated from the latest forecast every time it is opened, for the current date in the location's own time zone.
Editorial seasonal guidance for Rio de Janeiro where it has been written, plus daylight, midday sun angle and golden-hour length calculated for every month from Rio de Janeiro's coordinates. This page does not publish monthly temperature or rainfall averages: the site has no verified climate dataset, and it no longer generates one. For decisions inside the next week, the live 7-day ranking on the Rio de Janeiro weather page is the right tool.
Any weather decision in Rio De Janeiro starts from the light budget. In September the location gets about 12 h 7 min of daylight, with the sun peaking 67° above the horizon — that sets how warm afternoons run, how long outdoor plans stay viable and how much usable photographic light the day contains. The scores above layer the live Open-Meteo forecast on top of that baseline.
Daylight, midday sun angle and golden-hour length below are calculated for Rio De Janeiro's own coordinates (22.91° S, 43.17° W) on the 15th of each month. These are solar geometry, not climate averages.
| Month | Daylight | Sun at solar noon | Golden hour |
|---|---|---|---|
| January | 13 h 24 min | 88° | 47 min |
| February | 12 h 54 min | 80° | 45 min |
| March | 12 h 18 min | 70° | 43 min |
| April | 11 h 36 min | 58° | 44 min |
| May | 11 h 0 min | 48° | 47 min |
| June | 10 h 42 min | 44° | 48 min |
| July | 10 h 54 min | 46° | 48 min |
| August | 11 h 18 min | 53° | 45 min |
| September | 12 h 0 min | 65° | 43 min |
| October | 12 h 42 min | 77° | 44 min |
| November | 13 h 18 min | 86° | 46 min |
| December | 13 h 30 min | 90° | 48 min |
Scores are capped by dealbreakers — heavy rain, dangerous wind, thick fog or hazardous UV pull a day down no matter how pleasant the rest of the numbers look. Forecast data is Open-Meteo; solar and lunar values are computed for Rio De Janeiro's own coordinates and time zone. Full details on the methodology page.