Rio de Janeiro, Brazil · America/Sao_Paulo
Live lunar conditions
Is tonight a Moon night?
A daylight Moon window. The best window is 08:00–12:00; cloud cover looks cooperative.
Tonight's verdict
A daylight Moon window
Fair
Best window 08:00–12:00 · 4 hrs · Fair (55/100)
Look NNW · 41° above the horizon · 4 hrs
Phase
Waning Crescent
Illumination
40%
Next moonrise
Tomorrow 01:23
Next moonset
Tomorrow 13:08
Open-Meteo hourly forecast for 16:00 local · cached up to 20 min
Waning Crescent · 40% lit
Altitude -54° · Azimuth 263° · 375,822 km
Southern-hemisphere orientation · NASA LRO surface
Tonight's outlook
The next 24 hours, without the guesswork
A deterministic viewing score, a recommended window, and the weather that could change the plan. All times are local to Rio de Janeiro.
Best viewing window
08:00–12:00
4 hrs · look NNW · 41° altitude · 2% mean cloud
Tue 3 Nov · local time in Rio de Janeiro
Viewing score
Cloud-weighted, per hour
Fair
Mostly clear during the best window
Not a scientific measurement. The index favours a Moon that is easy to see, not necessarily the sharpest surface detail.
Best time to look
Best contiguous window in the next 24 hours
08:00–12:00
4 hrs · look NNW · 41° altitude
Starts Tue 3 Nov local time. The window is the longest qualifying run at or above 50/100, selected by mean score.
Weather snapshot
Hourly forecast for the selected location
Overcast
99%
Cloud cover · 46% chance of precipitation
Moon altitude & cloud cover
Next 24 hours · local time · cloud bars rise from the horizon
Hover or focus an hour for details
Weather: Open-Meteo
| Local time | Moon altitude | Cloud cover | Precipitation chance | Score | Light |
|---|---|---|---|---|---|
| Mon 2 Nov 17:00 | -64 degrees | 100% | 72% | 0 out of 100 | Daylight |
| Mon 2 Nov 18:00 | -76 degrees | 95% | 86% | 0 out of 100 | Daylight |
| Mon 2 Nov 19:00 | -81 degrees | 83% | 77% | 0 out of 100 | Night |
| Mon 2 Nov 20:00 | -71 degrees | 97% | 56% | 0 out of 100 | Night |
| Mon 2 Nov 21:00 | -59 degrees | 66% | 37% | 0 out of 100 | Night |
| Mon 2 Nov 22:00 | -46 degrees | 87% | 26% | 0 out of 100 | Night |
| Mon 2 Nov 23:00 | -32 degrees | 89% | 17% | 0 out of 100 | Night |
| Tue 3 Nov 00:00 | -19 degrees | 98% | 10% | 0 out of 100 | Night |
| Tue 3 Nov 01:00 | -5 degrees | 59% | 6% | 0 out of 100 | Night |
| Tue 3 Nov 02:00 | 7 degrees | 100% | 5% | 23 out of 100 | Night |
| Tue 3 Nov 03:00 | 20 degrees | 100% | 4% | 32 out of 100 | Night |
| Tue 3 Nov 04:00 | 32 degrees | 100% | 3% | 35 out of 100 | Night |
| Tue 3 Nov 05:00 | 43 degrees | 100% | 3% | 29 out of 100 | Twilight |
| Tue 3 Nov 06:00 | 51 degrees | 100% | 2% | 30 out of 100 | Daylight |
| Tue 3 Nov 07:00 | 56 degrees | 96% | 1% | 32 out of 100 | Daylight |
| Tue 3 Nov 08:00 | 54 degrees | 5% | 0% | 55 out of 100 | Daylight |
| Tue 3 Nov 09:00 | 48 degrees | 1% | 0% | 55 out of 100 | Daylight |
| Tue 3 Nov 10:00 | 38 degrees | 0% | 0% | 55 out of 100 | Daylight |
| Tue 3 Nov 11:00 | 26 degrees | 2% | 0% | 55 out of 100 | Daylight |
| Tue 3 Nov 12:00 | 14 degrees | 21% | 6% | 42 out of 100 | Daylight |
| Tue 3 Nov 13:00 | 1 degrees | 44% | 28% | 21 out of 100 | Daylight |
| Tue 3 Nov 14:00 | -12 degrees | 38% | 58% | 0 out of 100 | Daylight |
| Tue 3 Nov 15:00 | -25 degrees | 9% | 75% | 0 out of 100 | Daylight |
| Tue 3 Nov 16:00 | -38 degrees | 21% | 69% | 0 out of 100 | Daylight |
| Tue 3 Nov 17:00 | -51 degrees | 42% | 52% | 0 out of 100 | Daylight |
Why this recommendation
- Waning Crescent at 40% illumination. The terminator gives the strongest crater shadows for the next few nights.
- The Moon climbs to about 56° around 07:00.
- Next moonrise: Tue 3 Nov at 01:23.
- Forecast cloud cover averages 2% during the best window, with a 0% chance of precipitation.
Limitations & methodShowHide
- The Moon is above the horizon in daylight. The daylight score is capped because sky contrast is much lower.
- The viewing score is a convenience index, not a scientific measurement of sky quality.
- The Moon disc on this page is phase-correct but its orientation and surface detail are schematic; libration and parallactic angle are not modelled.
Local context
Moonwatching from Rio de Janeiro
At 22.9° S, the Moon follows a relatively high arc. The disc is shown rotated for the southern hemisphere with a NASA LRO surface.
All times on this page use the IANA time zone America/Sao_Paulo, including daylight-saving changes. The weather forecast is for coordinates -22.91°, -43.17°. It can differ across a large metropolitan area.
Want a different place? Use the location selector in the header, or view the live default page.
Next lunar event
Calculated phase · local to Rio de Janeiro
Mon
9
Nov
New Moon
04:02 local · Mon 9 Nov
New Moon occurs at 04:02 local time in Rio de Janeiro on 9 November. The Moon passes near the Sun in the sky, so its Earth-facing side is unlit. Dark skies make this a good period for deep-sky observing.
More in Brazil
Other city pages
These pages are curated, not generated for every place name. Each has the same calculated live data, a canonical URL, and a manual location selector for anywhere else. Method and sources.