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5-day weather forecast State of Rio de Janeiro 18-03-2026

Weather forecast State of Rio de Janeiro today 18.03.2026: fog, temperature from 15 °C to 27 °C.

Precipitation probability 67%. Wind up to 1.31 m/s (gusts 2.22 m/s). Air humidity 51–99%, atmospheric pressure 758–761 mm Hg, UV index up to 11.7.

Sunrise 05:54
Sunset 18:06
Chart
Table
Type of temperature:
°C
°F
Wed, 18 Mar, 2026
TemperaturePrecipitationCloud coverHumidityPressureWindUV Index
00:00Weather
Clear
17 °C0% 18%93%761 mm HgNW 316° 0.39 (0.81) m/s0
01:00Weather
Mist
16 °C0% 26%95%761 mm HgNW 322° 0.69 (1.47) m/s0
02:00Weather
Fog
15 °C0% 100%97%761 mm HgNW 305° 0.89 (1.89) m/s0
03:00Weather
Fog
15 °C0% 100%98%761 mm HgWNW 286° 0.69 (1.47) m/s0
04:00Weather
Fog
15 °C0% 100%97%761 mm HgW 266° 0.69 (1.47) m/s0
05:00Weather
Fog
15 °C0% 100%97%761 mm HgWSW 254° 0.5 (1.06) m/s0
06:00Weather
Fog
15 °C0% 100%98%761 mm HgWSW 247° 0.39 (0.83) m/s0
07:00Weather
Partly cloudy
17 °C0% 33%94%761 mm HgW 265° 0.31 (0.53) m/s0.7
08:00Weather
Sunny
20 °C0% 3%82%761 mm HgNNW 328° 0.39 (0.47) m/s2.4
09:00Weather
Sunny
23 °C0% 0%66%761 mm HgN 352° 0.69 (0.81) m/s5.1
10:00Weather
Sunny
24 °C0% 7%57%761 mm HgNNW 347° 0.81 (0.92) m/s8.5
11:00Weather
Sunny
25 °C0% 12%53%760 mm HgNNW 344° 1 (1.14) m/s11.3
12:00Weather
Patchy rain possible
26 °C67% (0.01 mm/hr)73%51%759 mm HgNNW 340° 1 (1.14) m/s11.7
13:00Weather
Patchy rain possible
27 °C78% (0.02 mm/hr)70%52%758 mm HgNNW 329° 0.61 (0.69) m/s8.6
14:00Weather
Patchy rain possible
26 °C63% (0.04 mm/hr)70%55%758 mm HgNE 47° 0.11 (0.11) m/s4.6
15:00Weather
Patchy rain possible
25 °C100% (0.12 mm/hr)71%63%758 mm HgSE 126° 0.5 (0.58) m/s2.6
16:00Weather
Light rain shower
23 °C100% (0.36 mm/hr)76%82%758 mm HgSE 138° 0.81 (1.08) m/s1.1
17:00Weather
Light rain shower
20 °C100% (0.32 mm/hr)51%93%758 mm HgSSE 153° 1.11 (1.75) m/s0.3
18:00Weather
Fog
19 °C100% (0.15 mm/hr)100%98%759 mm HgSSE 162° 1.31 (2.22) m/s0
19:00Weather
Fog
19 °C100% (0.06 mm/hr)100%99%759 mm HgSSE 160° 1.31 (2.14) m/s0
20:00Weather
Fog
19 °C64% (0.05 mm/hr)100%99%760 mm HgS 170° 1.11 (1.69) m/s0
21:00Weather
Fog
19 °C100% (0.06 mm/hr)100%99%760 mm HgS 172° 1.11 (1.61) m/s0
22:00Weather
Fog
18 °C70% (0.03 mm/hr)100%99%761 mm HgS 178° 1 (1.56) m/s0
23:00Weather
Fog
18 °C75% (0.01 mm/hr)100%99%760 mm HgS 169° 0.69 (1.14) m/s0
Wed, 18 Mar, 2026

Frequently asked questions about the weather in State of Rio de Janeiro

Today in State of Rio de Janeiro the temperature ranges from 15 °C to 27 °C, wind up to 1.31 m/s. Check the detailed hourly forecast above for more information.

The precipitation probability in State of Rio de Janeiro today is 67%. View the full multi-day forecast above to see the rain chances for each upcoming day.

The wind speed in State of Rio de Janeiro today reaches up to 1.31 m/s with gusts up to 2.22 m/s. Check the detailed wind chart above for hourly wind data.

The air humidity in State of Rio de Janeiro today ranges from 51% to 99%. View the humidity chart above for hourly details.

The UV index in State of Rio de Janeiro today reaches up to 11.7. Check the UV index chart above for hourly values throughout the day.

The atmospheric pressure in State of Rio de Janeiro today ranges from 758 to 761 mm Hg. View the pressure chart above for hourly readings.

Cloud cover in State of Rio de Janeiro today reaches up to 100%. Check the cloud cover chart above for hourly details throughout the day.

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.

Learn more about our methodology

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