Tempestade local/convectiva
Defesa Civil: Alerta de Tempestades no dia 28/10 das 10h as 23hs. Evite areas com riscos de alagamentos e ou enxurradas. Em caso de emergencia ligue 190 ou 193.
until 10/28/26, 11:55 PM
My city
3 active official warnings in this municipality.
38º25º
Today: high / low3.8 mm of rain forecast today
Official warnings
Defesa Civil: Alerta de Tempestades no dia 28/10 das 10h as 23hs. Evite areas com riscos de alagamentos e ou enxurradas. Em caso de emergencia ligue 190 ou 193.
until 10/28/26, 11:55 PM
Aviso de Tempestade: Perigo Potencial
until 10/28/26, 11:59 PM
Aviso de Tempestade: Perigo Potencial
until 10/28/26, 11:59 PM
Week highlights
Data for Teresina (PI), 56 km away.
Air now in Teresina: IQAr 26 (good).
Hottest day
39ºC
Tuesday, 11/03
Coldest night
24ºC
Thursday, 10/29
Rainiest day
5.8mm
Thursday, 10/29
10 mm in total this week
Strongest wind gust
47km/h
Tuesday, 11/03
Highest UV
9.6very high
Monday, 11/02
Each bar runs from the day's low to its high and the colour follows the temperature.
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
3.1mm
The normal rain for this month is not available for this city yet.
Most rain in one day
0.6mm
0.6 mm on September 24, in the last 90 days
Days in a row without rain
90days
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.
Rivers nearby
Parnaíba · 40 km away
Level now: 2.20 m · Drought
Parnaíba · 60 km away
Level now: 1.62 m · Drought
Maratã · 67 km away
Level now: 2.06 m · Normal
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 20 likely hotspots within 50 km in the last 24 h; the nearest is 13 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, União 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)
| Day | Rain | High | Low | UV | Gust | IQAr |
|---|---|---|---|---|---|---|
| Wed, 10/28 | 3.8 mm | 38 ºC | 25 ºC | 9.3 | 36 km/h | 36 |
| Thu, 10/29 | 5.8 mm | 33 ºC | 24 ºC | 9.3 | 33 km/h | 36 |
| Fri, 10/30 | 0.4 mm | 36 ºC | 24 ºC | 9.3 | 36 km/h | 35 |
| Sat, 10/31 | 0 mm | 38 ºC | 25 ºC | 9.3 | 31 km/h | 37 |
| Sun, 11/01 | 0 mm | 39 ºC | 25 ºC | 9.3 | 37 km/h | 34 |
| Mon, 11/02 | 0 mm | 39 ºC | 25 ºC | 9.6 | 45 km/h | – |
| Tue, 11/03 | 0 mm | 39 ºC | 26 ºC | 9.1 | 47 km/h | – |
Source: Open-Meteo.com (forecast and CAMS model air quality).
Wed 17:00 to 19:00
0.7 mm over the period, at most 0.4 mm in one hour · 49% chance
Wed 21:00 to 23:00
1.6 mm over the period, at most 1.1 mm in one hour · 53% chance
Thu 02:00 to 04:00
2.9 mm over the period, at most 1.5 mm in one hour · 58% chance
Thu 07:00 to 11:00
1.7 mm over the period, at most 0.7 mm in one hour · 76% chance
Thu 22:00 to 00:00
0.9 mm over the period, at most 0.5 mm in one hour · 20% chance
Source: Open-Meteo.com. Model forecast, updated every 3 hours: the timing may change.