Live Weather & Forecast
Weather in San Antonio
Alajuela, Costa Rica · Real-time conditions & 3-day outlook
21°C
Feels like 21°C
70°F / Feels 70°F
Partly cloudy
San Antonio, Alajuela
🌞 Daytime
Updated: 2026-05-13 06:45
Humidity
73%
Wind
7.6 km/h NE
Wind Gust
13.7 km/h
Pressure
1018 mb
Visibility
10 km
UV Index
0.2
(Low)
Precipitation
0 mm
Cloud Cover
75%
Dew Point
16°C
Wind Degree
51°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
199.9 μg/m³
NO₂
2.3 μg/m³
O₃
68 μg/m³
SO₂
3 μg/m³
PM 2.5
4.2 μg/m³
PM 10
4.4 μg/m³
Today's Hourly Forecast
24-hour breakdown for San Antonio, Alajuela
12 AM
18°
Partly Cloudy
1 AM
17°
Partly Cloudy
2 AM
17°
Partly Cloudy
3 AM
17°
Partly Cloudy
4 AM
16°
Partly Cloudy
5 AM
16°
Partly Cloudy
6 AM
21°
Partly cloudy
7 AM
22°
Sunny
8 AM
25°
Patchy rain nearby
9 AM
28°
Patchy rain nearby
10 AM
29°
Patchy rain nearby
11 AM
29°
Patchy rain nearby
12 PM
28°
Patchy rain nearby
1 PM
27°
Patchy rain nearby
2 PM
25°
Light rain shower
3 PM
26°
Patchy rain nearby
4 PM
26°
Patchy rain nearby
5 PM
25°
Patchy rain nearby
6 PM
20°
Patchy rain nearby
7 PM
19°
Patchy rain nearby
8 PM
20°
Clear
9 PM
19°
Clear
10 PM
18°
Clear
11 PM
18°
Clear
3-Day Forecast
Daily overview for San Antonio, Alajuela
Today
Patchy rain nearby
29°
/
16°
🌧️ 93% chance of rain
💧 Avg. humidity: 76%
💨 Max wind: 7.9 km/h
🌧️ Total precip: 3.14 mm
☀️ UV Index: 13.7
🌅 Sunrise: 05:16 AM
🌇 Sunset: 05:51 PM
🌙 Waning Crescent
🌑 Moon: 19% lit
Thu, May 14
Moderate rain
30°
/
17°
🌧️ 87% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 7.6 km/h
🌧️ Total precip: 5.69 mm
☀️ UV Index: 11.7
🌅 Sunrise: 05:16 AM
🌇 Sunset: 05:51 PM
🌙 Waning Crescent
🌑 Moon: 11% lit
Fri, May 15
Patchy rain nearby
30°
/
16°
🌧️ 85% chance of rain
💧 Avg. humidity: 76%
💨 Max wind: 8.3 km/h
🌧️ Total precip: 1.58 mm
☀️ UV Index: 0.2
🌅 Sunrise: 05:16 AM
🌇 Sunset: 05:51 PM
🌙 Waning Crescent
🌑 Moon: 5% lit
Best Time to Visit San Antonio
Plan your trip to San Antonio, Costa Rica around the most favorable weather conditions.
Peak Season
November – April
Dry season — low humidity, clear skies, comfortable temperatures.
Shoulder Season
May, October
Fewer crowds, moderate prices, mild weather.
Off Season
June – September
Wet/monsoon season; heavier rainfall possible.
Frequently Asked Questions
What is the current weather in San Antonio?
Current conditions in San Antonio: Partly cloudy, temperature 21°C, humidity 73%.
What is the best time to visit San Antonio?
The best time to visit San Antonio is typically November – April. Dry season — low humidity, clear skies, comfortable temperatures.
What is the climate like in San Antonio?
San Antonio is located at approximately 10° latitude. It has a tropical or subtropical climate with wet and dry seasons.
Does it rain a lot in San Antonio?
The wettest period in San Antonio is typically during June – September. Wet/monsoon season; heavier rainfall possible.
What should I pack for a trip to San Antonio?
For visits to San Antonio during November – April: light clothing and sun protection. For June – September: layers and a waterproof jacket are recommended.
What country is San Antonio in?
San Antonio is located in Costa Rica, in the state of Alajuela.
What are the public holidays in San Antonio in 2026?
View the 2026 public holidays for San Antonio on our Holidays page.
What are the GPS coordinates used for the weather forecast in San Antonio?
The weather forecast for San Antonio uses coordinates 9.9796, -84.1852.
What is the current temperature outside in San Antonio?
The current outdoor temperature in San Antonio is 21°C (70°F) with partly cloudy.
What is the hourly weather forecast for San Antonio today?
Today's hour-by-hour weather breakdown for San Antonio is shown in the Hourly Forecast section above, including temperature, rain chance, and conditions for each hour of the day.
What is the weather in San Antonio tomorrow hour by hour?
Tomorrow's forecast for San Antonio shows a high of 30°C and a low of 17°C. See the 3-Day Forecast section above for a full hourly breakdown.
What is the chance of rain today in San Antonio?
There is a 93% chance of rain in San Antonio today. Check the hourly forecast above for a time-by-time breakdown of when rain is most likely.
Is it going to rain today in San Antonio?
Yes, there is a 93% chance of rain in San Antonio today — consider carrying an umbrella. Check the hourly forecast above for the most likely rain windows.