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
06:40
Sunrise
18:38
Sunset
Moon
Waxing Gibbous
12:49
Moonrise
03:05
Moonset
Daily Forecast
Today
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Air Quality Data Available
Upgrade to access real-time air quality data for San José de Mayo.
Resources
UV Index
Humidity
Current stargazing conditions?
See sky darkness, moon phase, and the best viewing window for San José de Mayo.
View stargazing scoreWeather in San José de Mayo today, September 20, 2026
San José de Mayo looks damp on September 20, 2026, so plan for wet spells during the day. Early travel and outdoor time should assume rain can arrive quickly.
The day peaks near 25°C and cools toward 15°C. The air stays humid, with relative humidity between 57% and 98% and the peak around 21:00. A lighter breeze peaks around 15:00 near 3.3 km/h.
Through the afternoon wet weather remains a factor, with rain chances near 92% around 19:00. Cloud also stays substantial, close to 100% near 21:00. Visibility stays generally good near 13.2 km on average, though it can drop toward 1.6 km in thicker cloud or showers. Sunrise is at 06:40 and sunset at 18:38, giving 11 hours 58 minutes of sunlight today.
In short, treat September 20, 2026 in San José de Mayo as a damp day: pack covers, watch the wetter hours, and expect a high near 25°C.
Frequently asked questions about weather in San José de Mayo
How warm does it get in San José de Mayo?
The warmest month in San José de Mayo is January, with average high temperatures of 30°C. The average temperature during this period is around 24°C.
How cold does it get in San José de Mayo?
The coldest month in San José de Mayo is July, with average low temperatures of 7°C. The average temperature during this period is around 11°C.
What is the wettest time of year in San José de Mayo?
The wettest month in San José de Mayo is March, with an average of 106mm of precipitation.
What is the driest time of year in San José de Mayo?
The driest month in San José de Mayo is June, with an average of 61mm of precipitation.