Hottest day
35ºC
Tuesday, 11/03
My city
No official warning is active for this municipality right now. That does not guarantee everything is fine: see the rest of the page.
33º26º
Today: high / low2.8 mm of rain forecast today
Official warnings
No official warning is active for this municipality right now. Warnings for the whole country are in the Storms and alerts section.
Week highlights
Data for São Luís (MA), 99 km away.
Air now in São Luís: IQAr 18 (good).
Hottest day
35ºC
Tuesday, 11/03
Coldest night
25ºC
Saturday, 10/31
Rainiest day
3.5mm
Thursday, 10/29
7.5 mm in total this week
Strongest wind gust
50km/h
Monday, 11/02
Highest UV
9.2very high
Saturday, 10/31
Each bar runs from the day's low to its high and the colour follows the temperature.
| Day | Rain | High | Low | UV | Gust | IQAr |
|---|---|---|---|---|---|---|
| Wed, 10/28 | 2.8 mm | 33 ºC | 26 ºC | 8.8 | 31 km/h | 21 |
| Thu, 10/29 | 3.5 mm | 32 ºC | 25 ºC | 8.4 | 38 km/h | 25 |
| Fri, 10/30 | 0 mm | 34 ºC | 25 ºC | 8.9 | 43 km/h | 25 |
| Sat, 10/31 | 0 mm | 34 ºC | 25 ºC | 9.2 | 40 km/h | 27 |
| Sun, 11/01 | 1.2 mm | 34 ºC | 26 ºC | 9.1 | 39 km/h | 25 |
| Mon, 11/02 | 0 mm | 34 ºC | 26 ºC | 8.1 | 50 km/h | – |
| Tue, 11/03 | 0 mm | 35 ºC | 26 ºC | 8.9 | 45 km/h | – |
Source: Open-Meteo.com (forecast and CAMS model air quality).
Hour-by-hour rain
The next 24 hours, Brasília time. Each column is a full hour and its height is the rain forecast for it.
Recent rain
The last 30 days, up to October 27. Each column is a day and its height is that day's rain; in orange, days with 50 mm or more.
Rain in October, up to 10/27
44.9mm
The normal rain for this month is not available for this city yet.
Most rain in one day
6.3mm
6.3 mm on October 9, in the last 90 days
Days in a row without rain
Rivers nearby
Itapecuru · 76 km away
Level now: 2.79 m · No reference
Itapecuru · 87 km away
Level now: 1.99 m · Drought
Itapecuru · 145 km away
Level now: 0.96 m · Drought
Source: ANA (telemetry); SGB reference levels where they exist. The level is compared with the station's own at this time of year.
Fire, rain and drought
There are 132 likely hotspots within 50 km in the last 24 h; the nearest is 3 km away.
CEMADEN rain gauges within 30 km: the highest 24 h total was 0 mm (4 stations with data).
On the official September 2026 map, Viana is in weak drought (s0).
Sources: INPE and NASA FIRMS (fire), CEMADEN (rain), ANA Drought Monitor.
In an emergency, follow Civil Defense: 199. Fire Department: 193. SAMU: 192.
Dashed: the month's average (1991–2020)Rain (mm)
Wed 13:00 to 16:00
2.6 mm over the period, at most 0.9 mm in one hour · 100% chance
Thu 10:00 to 16:00
3.1 mm over the period, at most 1.8 mm in one hour · 87% chance
Source: Open-Meteo.com. Model forecast, updated every 3 hours: the timing may change.
2days
Source: Open-Meteo.com, ERA5 reanalysis (a model, not a rain gauge); the latest day may be corrected later. A day without rain: under 1 mm.