Live Weather & Forecast
Weather in San Diego
Cartago, Costa Rica · Real-time conditions & 3-day outlook
19°C
Feels like 19°C
66°F / Feels 66°F
Partly cloudy
San Diego, Cartago
🌞 Daytime
Updated: 2026-05-12 12:30
Humidity
68%
Wind
18 km/h SW
Wind Gust
20.7 km/h
Pressure
1018 mb
Visibility
16 km
UV Index
8.9
(Very High)
Precipitation
0.01 mm
Cloud Cover
75%
Dew Point
16.2°C
Wind Degree
214°
Air Quality Index
US EPA: Moderate
UK DEFRA: Low (2)
CO
143.9 μg/m³
NO₂
11.3 μg/m³
O₃
78 μg/m³
SO₂
3.2 μg/m³
PM 2.5
16 μg/m³
PM 10
22.6 μg/m³
Today's Hourly Forecast
24-hour breakdown for San Diego, Cartago
12 AM
16°
Mist
1 AM
16°
Fog
2 AM
16°
Patchy rain nearby
3 AM
16°
Patchy rain nearby
4 AM
16°
Overcast
5 AM
16°
Overcast
6 AM
16°
Patchy rain nearby
7 AM
17°
Mist
8 AM
17°
Patchy rain nearby
9 AM
17°
Patchy rain nearby
10 AM
17°
Patchy rain nearby
11 AM
17°
Patchy rain nearby
12 PM
19°
Partly cloudy
1 PM
18°
Overcast
2 PM
19°
Overcast
3 PM
19°
Overcast
4 PM
19°
Overcast
5 PM
19°
Overcast
6 PM
19°
Overcast
7 PM
18°
Overcast
8 PM
18°
Overcast
9 PM
18°
Overcast
10 PM
18°
Partly Cloudy
11 PM
18°
Partly Cloudy
3-Day Forecast
Daily overview for San Diego, Cartago
Today
Patchy rain nearby
19°
/
16°
🌧️ 89% chance of rain
💧 Avg. humidity: 88%
💨 Max wind: 18.4 km/h
🌧️ Total precip: 0.62 mm
☀️ UV Index: 9.2
🌅 Sunrise: 05:52 AM
🌇 Sunset: 07:39 PM
🌙 Waning Crescent
🌑 Moon: 29% lit
Wed, May 13
Sunny
20°
/
17°
🌧️ 0% chance of rain
💧 Avg. humidity: 67%
💨 Max wind: 17.6 km/h
🌧️ Total precip: 0.05 mm
☀️ UV Index: 8.9
🌅 Sunrise: 05:51 AM
🌇 Sunset: 07:40 PM
🌙 Waning Crescent
🌑 Moon: 19% lit
Thu, May 14
Sunny
20°
/
16°
🌧️ 0% chance of rain
💧 Avg. humidity: 69%
💨 Max wind: 16.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 9.6
🌅 Sunrise: 05:51 AM
🌇 Sunset: 07:40 PM
🌙 Waning Crescent
🌑 Moon: 11% lit
Best Time to Visit San Diego
Plan your trip to San Diego, Costa Rica around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in San Diego?
Current conditions in San Diego: Partly cloudy, temperature 19°C, humidity 68%.
What is the best time to visit San Diego?
The best time to visit San Diego is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in San Diego?
San Diego is located at approximately 32.7° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in San Diego?
The wettest period in San Diego is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to San Diego?
For visits to San Diego during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is San Diego in?
San Diego is located in Costa Rica, in the state of Cartago.
What are the public holidays in San Diego in 2026?
View the 2026 public holidays for San Diego on our Holidays page.
What are the GPS coordinates used for the weather forecast in San Diego?
The weather forecast for San Diego uses coordinates 32.7174, -117.1628.
What is the current temperature outside in San Diego?
The current outdoor temperature in San Diego is 19°C (66°F) with partly cloudy.
What is the hourly weather forecast for San Diego today?
Today's hour-by-hour weather breakdown for San Diego 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 Diego tomorrow hour by hour?
Tomorrow's forecast for San Diego shows a high of 20°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 Diego?
There is a 89% chance of rain in San Diego 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 Diego?
Yes, there is a 89% chance of rain in San Diego today — consider carrying an umbrella. Check the hourly forecast above for the most likely rain windows.