5-day weather forecast Rio de Janeiro 18-05-2026
Weather forecast Rio de Janeiro Monday, May 18 18.05.2026: patchy rain possible, temperature from 21 °C to 25 °C.
Precipitation probability 100%. Wind up to 5.89 m/s (gusts 9.42 m/s). Air humidity 77–95%, atmospheric pressure 760–763 mm Hg, UV index up to 3.7.
Sunrise 06:20
Sunset 17:18
Sunset 17:18
Waxing Crescent2% illuminated
Moonrise 08:19 · Moonset 19:03
Moonrise 08:19 · Moonset 19:03
Chart
Table
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Light rain shower | 21 °C | 100% (0.39 mm/hr) | 85% | 95% | 763 mm Hg | W 276° 3.31 (4.69) m/s | 0 |
| 01:00 | Light rain shower | 21 °C | 100% (0.28 mm/hr) | 61% | 95% | 762 mm Hg | NNW 345° 2.89 (4.31) m/s | 0 |
| 02:00 |  Partly cloudy | 21 °C | 0% | 46% | 95% | 760 mm Hg | NNE 20° 5.89 (9.42) m/s | 0 |
| 03:00 | Partly cloudy | 21 °C | 0% | 33% | 93% | 760 mm Hg | NNW 345° 3.31 (5.44) m/s | 0 |
| 04:00 | Partly cloudy | 21 °C | 0% | 59% | 92% | 760 mm Hg | NW 315° 1.31 (2.31) m/s | 0 |
| 05:00 | Partly cloudy | 21 °C | 0% | 48% | 92% | 760 mm Hg | WNW 282° 1.39 (2.53) m/s | 0 |
| 06:00 | Partly cloudy | 21 °C | 0% | 39% | 91% | 761 mm Hg | WNW 282° 1.61 (2.83) m/s | 0 |
| 07:00 |  Partly cloudy | 22 °C | 0% | 35% | 89% | 761 mm Hg | NW 305° 1.19 (2.03) m/s | 0.1 |
| 08:00 | Partly cloudy | 23 °C | 0% | 55% | 86% | 762 mm Hg | NW 316° 1.11 (1.61) m/s | 0.9 |
| 09:00 |  Patchy rain possible | 23 °C | 89% (0.01 mm/hr) | 52% | 83% | 763 mm Hg | W 276° 0.89 (1.25) m/s | 1.7 |
| 10:00 | Patchy rain possible | 24 °C | 71% (0.02 mm/hr) | 52% | 83% | 763 mm Hg | SW 232° 1.81 (2.53) m/s | 1.7 |
| 11:00 | Partly cloudy | 24 °C | 0% | 53% | 77% | 763 mm Hg | WSW 237° 2.31 (2.92) m/s | 3.2 |
| 12:00 | Patchy rain possible | 25 °C | 100% (0.07 mm/hr) | 95% | 77% | 763 mm Hg | SW 234° 3.89 (4.86) m/s | 3.7 |
| 13:00 | Patchy rain possible | 25 °C | 100% (0.06 mm/hr) | 100% | 78% | 762 mm Hg | WSW 237° 3.31 (4.06) m/s | 3.2 |
| 14:00 | Patchy rain possible | 24 °C | 74% (0.01 mm/hr) | 52% | 80% | 761 mm Hg | SW 216° 0.61 (0.81) m/s | 1.7 |
| 15:00 | Patchy rain possible | 24 °C | 62% (0.03 mm/hr) | 80% | 82% | 761 mm Hg | NNE 13° 1.19 (1.78) m/s | 0.6 |
| 16:00 | Patchy rain possible | 24 °C | 77% (0.02 mm/hr) | 72% | 82% | 761 mm Hg | NE 35° 2.5 (4.08) m/s | 0.2 |
| 17:00 | Patchy rain possible | 24 °C | 100% (0.13 mm/hr) | 86% | 83% | 761 mm Hg | NNE 16° 1.61 (2.78) m/s | 0 |
| 18:00 |  Patchy light drizzle | 23 °C | 100% (0.24 mm/hr) | 84% | 83% | 761 mm Hg | NNW 331° 1.19 (2.11) m/s | 0 |
| 19:00 |  Patchy rain possible | 23 °C | 70% (0.01 mm/hr) | 87% | 85% | 761 mm Hg | N 353° 0.89 (1.58) m/s | 0 |
| 20:00 | Patchy rain possible | 23 °C | 100% (0.08 mm/hr) | 72% | 86% | 762 mm Hg | WNW 297° 1.31 (2.22) m/s | 0 |
| 21:00 | Patchy rain possible | 23 °C | 100% (0.06 mm/hr) | 58% | 88% | 762 mm Hg | W 269° 1.19 (1.97) m/s | 0 |
| 22:00 | Patchy rain possible | 23 °C | 67% (0.02 mm/hr) | 77% | 90% | 762 mm Hg | WSW 241° 0.81 (1.28) m/s | 0 |
| 23:00 | Patchy rain possible | 23 °C | 77% (0.02 mm/hr) | 85% | 90% | 762 mm Hg | SW 222° 0.61 (0.92) m/s | 0 |
Rio de Janeiro on the map
Data Sources & Methodology
Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.