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

Weather forecast Rio de Janeiro tomorrow 18.03.2026: partly cloudy, temperature from 22 °C to 28 °C.

Precipitation probability 77%. Wind up to 4.11 m/s (gusts 5.31 m/s). Air humidity 65–91%, atmospheric pressure 758–760 mm Hg, UV index up to 9.5.

Sunrise 05:54
Sunset 18:07
Chart
Table
Type of temperature:
°C
°F
Wed, 18 Mar, 2026
TemperaturePrecipitationCloud coverHumidityPressureWindUV Index
00:00Weather
Partly cloudy
23 °C0% 42%86%760 mm HgENE 61° 2.19 (3.28) m/s0
01:00Weather
Partly cloudy
23 °C0% 44%87%760 mm HgNE 54° 1.81 (2.69) m/s0
02:00Weather
Partly cloudy
22 °C0% 44%88%759 mm HgNE 50° 1.61 (2.42) m/s0
03:00Weather
Partly cloudy
22 °C0% 40%89%758 mm HgNE 48° 1.5 (2.25) m/s0
04:00Weather
Partly cloudy
22 °C0% 34%90%758 mm HgNNE 32° 1.69 (2.56) m/s0
05:00Weather
Partly cloudy
22 °C0% 31%90%759 mm HgNNE 24° 1.5 (2.28) m/s0
06:00Weather
Partly cloudy
22 °C0% 33%91%759 mm HgNNE 20° 1.39 (2.17) m/s0
07:00Weather
Partly cloudy
22 °C0% 31%88%760 mm HgNE 34° 1.11 (1.53) m/s0.6
08:00Weather
Sunny
24 °C0% 18%84%760 mm HgNNE 32° 1.31 (1.61) m/s2.1
09:00Weather
Sunny
25 °C0% 23%77%760 mm HgNE 45° 1.11 (1.28) m/s4.6
10:00Weather
Partly cloudy
26 °C0% 30%71%760 mm HgE 101° 0.89 (1.03) m/s7.2
11:00Weather
Partly cloudy
27 °C0% 27%68%759 mm HgSE 124° 1.81 (2.08) m/s9
12:00Weather
Partly cloudy
27 °C0% 26%66%758 mm HgSE 137° 2.89 (3.33) m/s9.5
13:00Weather
Partly cloudy
28 °C0% 56%65%758 mm HgSE 138° 3.39 (3.92) m/s8.2
14:00Weather
Cloudy
27 °C0% 82%66%758 mm HgSE 138° 3.89 (4.64) m/s6.1
15:00Weather
Patchy rain possible
27 °C77% (0.02 mm/hr)86%69%758 mm HgSE 136° 4.11 (5.14) m/s3.7
16:00Weather
Patchy rain possible
26 °C79% (0.01 mm/hr)94%71%758 mm HgSE 130° 4.11 (5.31) m/s1.7
17:00Weather
Patchy rain possible
26 °C83% (0.01 mm/hr)94%75%758 mm HgESE 122° 3.61 (4.83) m/s0.4
18:00Weather
Patchy rain possible
25 °C81% (0.02 mm/hr)86%78%758 mm HgESE 115° 3.31 (4.58) m/s0
19:00Weather
Patchy rain possible
25 °C67% (0.03 mm/hr)81%79%758 mm HgESE 110° 3.11 (4.28) m/s0
20:00Weather
Patchy rain possible
25 °C70% (0.04 mm/hr)78%80%758 mm HgESE 103° 3.19 (4.42) m/s0
21:00Weather
Patchy rain possible
24 °C100% (0.13 mm/hr)81%81%759 mm HgE 98° 3.11 (4.33) m/s0
22:00Weather
Patchy rain possible
24 °C100% (0.05 mm/hr)70%81%759 mm HgE 90° 3 (4.19) m/s0
23:00Weather
Patchy rain possible
24 °C87% (0.02 mm/hr)60%82%759 mm HgE 83° 2.81 (3.86) m/s0

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.

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