See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:15
Sunrise
18:16
Sunset
Moon
Waxing Gibbous
13:36
Moonrise
03:10
Moonset
Daily Forecast
Today
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Air Quality Data Available
Upgrade to access real-time air quality data for Gravatai.
Resources
UV Index
Humidity
Current stargazing conditions?
See sky darkness, moon phase, and the best viewing window for Gravatai.
View stargazing scoreWeather in Gravatai today, September 21, 2026
Expect unsettled, showery conditions in Gravatai on September 21, 2026 as rain moves through. The day opens on a wet note and needs flexible outdoor plans. Wetter spells lean into the morning, when rain odds reach about 92% near 04:00. Skies look heaviest around 04:00, with cover close to 100%.
Temperatures climb from an overnight low near 18°C toward a daytime high of about 27°C. Relative humidity sits between 66% and 98%, reaching its peak around 18:00. Winds stay light, near 7.3 km/h by 09:00, so the day feels still more than breezy.
The second half of the day still looks unsettled, with rain probability around 94% by 16:00. Dense cloud near 100% at 12:00 keeps the feel grey. Expect visibility near 6.7 km, with poorer spells close to 0.7 km. Expect sunrise at 06:15, sunset at 18:16, and 12 hours 0 minutes of sunlight today overall.
Overall, Gravatai on September 21, 2026 suits indoor plans or waterproof kit, especially while rain chances stay near 94% and the high sits around 27°C.
Frequently asked questions about weather in Gravatai
How warm does it get in Gravatai?
The warmest month in Gravatai is January, with average high temperatures of 30°C. The average temperature during this period is around 25°C.
How cold does it get in Gravatai?
The coldest month in Gravatai is July, with average low temperatures of 11°C. The average temperature during this period is around 14°C.
What is the wettest time of year in Gravatai?
The wettest month in Gravatai is September, with an average of 170mm of precipitation.
What is the driest time of year in Gravatai?
The driest month in Gravatai is April, with an average of 91mm of precipitation.
Explore more weather forecasts
- Gravataí, Rio Grande do Sul
- São Paulo, São Paulo
- Cachoeirinha, Rio Grande do Sul
- Rio de Janeiro, Rio de Janeiro
- Viamão, Rio Grande do Sul
- Belo Horizonte, Minas Gerais
- Canoas, Rio Grande do Sul
- Salvador, Bahia
- Esteio, Rio Grande do Sul
- Fortaleza, Ceará
- Sapucaia do Sul, Rio Grande do Sul
- Manaus, Amazonas
- Porto Alegre, Rio Grande do Sul
- Brasília, Federal District
- São Leopoldo, Rio Grande do Sul
- Curitiba, Paraná
