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San José, Costa Rica Weather Averages

April is the hottest month in San José with an average temperature of 25°C (76°F) and the coldest is January at 22°C (71°F) with the most daily sunshine hours at 7 in June. The wettest month is September with an average of 240mm of rain..

Average Temperature San José

What is Average Temperature?
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month
What is Average Temperature?
The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month

Average High Low Temperature San José

What is Average High Low Temperature?
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily
What is Average High Low Temperature?
The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily

Average Rainfall San José

What is Average Rainfall?
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years
What is Average Rainfall?
The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years

Average Daily Sunshine Hours San José

What are Average Daily Sunshine Hours?
Total sunshine hours for the month, divided by the number of days in the month. Sunshine hours are taken with a sunshine recorder, either a Campbell-Stokes recorder or an Eppley Pyreheliometer
What are Average Daily Sunshine Hours?
Total sunshine hours for the month, divided by the number of days in the month. Sunshine hours are taken with a sunshine recorder, either a Campbell-Stokes recorder or an Eppley Pyreheliometer

San José : Next 24-Hour Weather

Today - 9th December 2025

Sunrise 05:43

Sunrise

Sunset 17:16

Sunset
13:00
Patchy rain possible
24°C (75°F)
14:00
Light rain shower
23°C (73°F)
15:00
Patchy rain possible
23°C (73°F)
16:00
Patchy rain possible
23°C (72°F)
17:00
Patchy rain possible
19°C (65°F)
18:00
Mist
15°C (59°F)
19:00
Fog
15°C (57°F)
20:00
Mist
14°C (57°F)
21:00
Mist
14°C (56°F)
22:00
Mist
13°C (55°F)
23:00
Mist
13°C (54°F)

Tomorrow - 10th December 2025

Sunrise 05:43

Sunrise

Sunset 17:16

Sunset
0:00
Mist
12°C (53°F)
1:00
Mist
12°C (53°F)
2:00
Mist
12°C (52°F)
3:00
Clear
11°C (52°F)
4:00
Clear
13°C (55°F)
5:00
Clear
14°C (56°F)
6:00
Clear
14°C (56°F)
7:00
Clear
17°C (62°F)
8:00
Clear
21°C (70°F)
9:00
Clear
24°C (75°F)
10:00
Clear
26°C (79°F)
11:00
Partly cloudy
28°C (81°F)
12:00
Patchy rain possible
27°C (80°F)