San Jose, Costa Rica 14-Day Forecast
Costa Rica 🇨🇷
64°
Light rain shower right now
Today: high 71°, low 60°
Updated 1 min ago
San Jose weather for the next 14 days
Wednesday, September 16
Light rain shower High 72° Low 58°Precipitation
84%
· 0.14 in
Max wind
5 mph
Humidity
91%
UV index
12 - Extreme
Sunrise / sunset
05:26 AM / 05:36 PM
Thursday, September 17
Fog High 72° Low 59°Precipitation
83%
· 0.1 in
Max wind
6 mph
Humidity
91%
UV index
10 - Very High
Sunrise / sunset
05:25 AM / 05:35 PM
Friday, September 18
Light rain shower High 73° Low 60°Precipitation
89%
· 0.32 in
Max wind
5 mph
Humidity
91%
UV index
11 - Extreme
Sunrise / sunset
05:25 AM / 05:35 PM
Saturday, September 19
Fog High 74° Low 60°Precipitation
92%
· 0.48 in
Max wind
4 mph
Humidity
92%
UV index
12 - Extreme
Sunrise / sunset
05:25 AM / 05:34 PM
Sunday, September 20
Light rain shower High 70° Low 60°Precipitation
92%
· 0.75 in
Max wind
4 mph
Humidity
93%
UV index
5 - Moderate
Sunrise / sunset
05:25 AM / 05:33 PM
Monday, September 21
Light rain shower High 69° Low 63°Precipitation
94%
· 1.34 in
Max wind
4 mph
Humidity
96%
UV index
5 - Moderate
Sunrise / sunset
05:25 AM / 05:33 PM
Tuesday, September 22
Light rain shower High 67° Low 62°Precipitation
93%
· 0.81 in
Max wind
3 mph
Humidity
95%
UV index
4 - Moderate
Sunrise / sunset
05:25 AM / 05:32 PM
Wednesday, September 23
Light rain shower High 67° Low 60°Precipitation
94%
· 1.73 in
Max wind
3 mph
Humidity
96%
UV index
4 - Moderate
Sunrise / sunset
05:25 AM / 05:31 PM
Thursday, September 24
Light rain shower High 70° Low 60°Precipitation
94%
· 0.51 in
Max wind
3 mph
Humidity
95%
UV index
5 - Moderate
Sunrise / sunset
05:25 AM / 05:31 PM
Friday, September 25
Light rain shower High 66° Low 60°Precipitation
91%
· 0.2 in
Max wind
4 mph
Humidity
96%
UV index
4 - Moderate
Sunrise / sunset
05:25 AM / 05:30 PM
Saturday, September 26
Fog High 64° Low 61°Precipitation
89%
· 0.13 in
Max wind
3 mph
Humidity
98%
UV index
4 - Moderate
Sunrise / sunset
05:25 AM / 05:30 PM
Sunday, September 27
Light rain shower High 70° Low 61°Precipitation
93%
· 1.27 in
Max wind
3 mph
Humidity
95%
UV index
5 - Moderate
Sunrise / sunset
05:25 AM / 05:29 PM
Monday, September 28
Light rain shower High 71° Low 60°Precipitation
93%
· 1.11 in
Max wind
3 mph
Humidity
94%
UV index
5 - Moderate
Sunrise / sunset
05:25 AM / 05:28 PM
San Jose 14-day outlook: the story
The warmest day of San Jose's 14-day outlook is Saturday, September 19 with a high near 74°F (23°C); the coolest night comes Wednesday, September 16, dipping to 58°F (14°C). The trend points cooler: week two runs about 4°F below week one. Highs over the next two weeks average 72°F (22°C), about 5°F (3°C) below the typical September high of 77°F (25°C).
Precipitation is most likely on Tuesday 15, Wednesday 16, Thursday 17, Friday 18 and beyond; the wettest day looks like Wednesday, September 23 with about 1.73 in (43.9 mm) expected. For the weekend, expect Saturday 74°F (23°C) and fog / Sunday 70°F (21°C) and light rain shower.
For typical conditions month by month, see the San Jose climate & average temperatures guide.
San Jose forecast questions
Will it rain in San Jose this week?
The forecast currently shows meaningful precipitation chances on 14 of the next 14 days, peaking around Wednesday, September 23.
What will be the warmest day in San Jose over the next 14 days?
Saturday, September 19, with a forecast high near 74°F (23°C).
How accurate is a 14-day forecast for San Jose?
Days 1-3 are highly reliable, days 4-7 capture the overall pattern well, and days 8-14 indicate trends rather than exact figures - check back as the date approaches; this page refreshes throughout the day.
Average temperatures in San Jose by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 77° | 61° | 8 | 1.9 in | 10.7 h/day | 73% |
| February | 79° | 61° | 6 | 1.4 in | 11.3 h/day | 68% |
| March | 80° | 62° | 8 | 1.3 in | 11.2 h/day | 68% |
| April | 80° | 63° | 17 | 4.5 in | 10.4 h/day | 74% |
| May | 78° | 63° | 27 | 15.0 in | 8.5 h/day | 85% |
| June | 76° | 63° | 28 | 14.3 in | 8.1 h/day | 88% |
| July | 76° | 63° | 24 | 12.1 in | 8.3 h/day | 84% |
| August | 77° | 63° | 27 | 15.0 in | 8.5 h/day | 86% |
| September | 77° | 62° | 29 | 16.6 in | 8.2 h/day | 89% |
| October | 75° | 62° | 29 | 21.1 in | 7.8 h/day | 90% |
| November | 75° | 62° | 25 | 13.5 in | 8.1 h/day | 87% |
| December | 76° | 62° | 13 | 3.5 in | 10.1 h/day | 78% |
14-day forecasts nearby