Live Weather & Forecast
Weather in San Mateo
Alajuela, Costa Rica · Real-time conditions & 3-day outlook
22°C
Feels like 25°C
72°F / Feels 76°F
Partly cloudy
San Mateo, Alajuela
🌞 Daytime
Updated: 2026-05-13 06:45
Humidity
73%
Wind
6.1 km/h NE
Wind Gust
10.4 km/h
Pressure
1017 mb
Visibility
10 km
UV Index
0.2
(Low)
Precipitation
0 mm
Cloud Cover
75%
Dew Point
17.1°C
Wind Degree
44°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
181.9 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 Mateo, Alajuela
12 AM
19°
Partly Cloudy
1 AM
18°
Partly Cloudy
2 AM
18°
Partly Cloudy
3 AM
18°
Partly Cloudy
4 AM
18°
Partly Cloudy
5 AM
18°
Partly Cloudy
6 AM
22°
Partly cloudy
7 AM
22°
Patchy rain nearby
8 AM
24°
Patchy rain nearby
9 AM
27°
Patchy rain nearby
10 AM
28°
Patchy rain nearby
11 AM
29°
Patchy rain nearby
12 PM
28°
Patchy rain nearby
1 PM
27°
Patchy rain nearby
2 PM
26°
Patchy light drizzle
3 PM
25°
Patchy rain nearby
4 PM
25°
Patchy rain nearby
5 PM
24°
Patchy rain nearby
6 PM
21°
Patchy rain nearby
7 PM
21°
Patchy rain nearby
8 PM
20°
Patchy rain nearby
9 PM
20°
Partly Cloudy
10 PM
20°
Clear
11 PM
19°
Clear
3-Day Forecast
Daily overview for San Mateo, Alajuela
Today
Patchy rain nearby
29°
/
18°
🌧️ 93% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 7.6 km/h
🌧️ Total precip: 2.13 mm
☀️ UV Index: 13.7
🌅 Sunrise: 05:17 AM
🌇 Sunset: 05:51 PM
🌙 Waning Crescent
🌑 Moon: 19% lit
Thu, May 14
Patchy rain nearby
29°
/
19°
🌧️ 89% chance of rain
💧 Avg. humidity: 79%
💨 Max wind: 6.5 km/h
🌧️ Total precip: 4.3 mm
☀️ UV Index: 10.8
🌅 Sunrise: 05:17 AM
🌇 Sunset: 05:51 PM
🌙 Waning Crescent
🌑 Moon: 11% lit
Fri, May 15
Patchy rain nearby
29°
/
17°
🌧️ 87% chance of rain
💧 Avg. humidity: 76%
💨 Max wind: 7.6 km/h
🌧️ Total precip: 0.95 mm
☀️ UV Index: 0.2
🌅 Sunrise: 05:16 AM
🌇 Sunset: 05:52 PM
🌙 Waning Crescent
🌑 Moon: 5% lit
Best Time to Visit San Mateo
Plan your trip to San Mateo, 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 Mateo?
Current conditions in San Mateo: Partly cloudy, temperature 22°C, humidity 73%.
What is the best time to visit San Mateo?
The best time to visit San Mateo is typically November – April. Dry season — low humidity, clear skies, comfortable temperatures.
What is the climate like in San Mateo?
San Mateo is located at approximately 9.9° latitude. It has a tropical or subtropical climate with wet and dry seasons.
Does it rain a lot in San Mateo?
The wettest period in San Mateo is typically during June – September. Wet/monsoon season; heavier rainfall possible.
What should I pack for a trip to San Mateo?
For visits to San Mateo during November – April: light clothing and sun protection. For June – September: layers and a waterproof jacket are recommended.
What country is San Mateo in?
San Mateo is located in Costa Rica, in the state of Alajuela.
What are the public holidays in San Mateo in 2026?
View the 2026 public holidays for San Mateo on our Holidays page.
What are the GPS coordinates used for the weather forecast in San Mateo?
The weather forecast for San Mateo uses coordinates 9.9363, -84.5222.
What is the current temperature outside in San Mateo?
The current outdoor temperature in San Mateo is 22°C (72°F) with partly cloudy.
What is the hourly weather forecast for San Mateo today?
Today's hour-by-hour weather breakdown for San Mateo 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 Mateo tomorrow hour by hour?
Tomorrow's forecast for San Mateo shows a high of 29°C and a low of 19°C. See the 3-Day Forecast section above for a full hourly breakdown.
What is the chance of rain today in San Mateo?
There is a 93% chance of rain in San Mateo 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 Mateo?
Yes, there is a 93% chance of rain in San Mateo today — consider carrying an umbrella. Check the hourly forecast above for the most likely rain windows.