10-day forecast — San José
Refreshed hourly
Fri · Today · 13 Nov
Fog
25°
19°
0.28 in
⌄
Wind5 mph SW
Gusts12 mph
UV index11 – Very high
Precip chance83%
Sunrise5:30 AM
Sunset5:11 PM
Sat · Tomorrow · 14 Nov
Showers
27°
19°
0.21 in
⌄
Wind3 mph SW
Gusts11 mph
UV index12 – Extreme
Precip chance81%
Sunrise5:30 AM
Sunset5:11 PM
Sunday · 15 Nov
Fog
24°
18°
0.31 in
⌄
Wind3 mph NE
Gusts13 mph
UV index5 – Moderate
Precip chance87%
Sunrise5:30 AM
Sunset5:10 PM
Monday · 16 Nov
Partly cloudy
26°
18°
0.18 in
⌄
Wind4 mph NE
Gusts12 mph
UV index6 – High
Precip chance80%
Sunrise5:31 AM
Sunset5:10 PM
Tuesday · 17 Nov
Showers
26°
18°
0.14 in
⌄
Wind3 mph NE
Gusts10 mph
UV index6 – High
Precip chance73%
Sunrise5:31 AM
Sunset5:10 PM
Wednesday · 18 Nov
Partly cloudy
25°
17°
0.29 in
⌄
Wind3 mph NE
Gusts10 mph
UV index7 – High
Precip chance76%
Sunrise5:31 AM
Sunset5:10 PM
Thursday · 19 Nov
Sunny
25°
16°
0.27 in
⌄
Wind4 mph NE
Gusts14 mph
UV index6 – High
Precip chance78%
Sunrise5:32 AM
Sunset5:11 PM
Friday · 20 Nov
Partly cloudy
25°
17°
0.21 in
⌄
Wind4 mph SW
Gusts13 mph
UV index6 – High
Precip chance79%
Sunrise5:32 AM
Sunset5:11 PM
Saturday · 21 Nov
Fog
24°
18°
0.09 in
⌄
Wind4 mph SW
Gusts12 mph
UV index5 – Moderate
Precip chance75%
Sunrise5:33 AM
Sunset5:11 PM
Sunday · 22 Nov
Fog
26°
18°
0.19 in
⌄
Wind4 mph SW
Gusts13 mph
UV index6 – High
Precip chance82%
Sunrise5:33 AM
Sunset5:11 PM
Monday · 23 Nov
Fog
24°
19°
0.15 in
⌄
Wind4 mph SW
Gusts11 mph
UV index5 – Moderate
Precip chance82%
Sunrise5:34 AM
Sunset5:11 PM
Tuesday · 24 Nov
Fog
26°
19°
0.19 in
⌄
Wind4 mph SW
Gusts12 mph
UV index6 – High
Precip chance83%
Sunrise5:34 AM
Sunset5:11 PM
Wednesday · 25 Nov
Partly cloudy
25°
18°
0.13 in
⌄
Wind4 mph SW
Gusts13 mph
UV index5 – Moderate
Precip chance74%
Sunrise5:34 AM
Sunset5:11 PM
Thursday · 26 Nov
Showers
25°
18°
0.18 in
⌄
Wind4 mph SW
Gusts13 mph
UV index6 – High
Precip chance79%
Sunrise5:35 AM
Sunset5:11 PM
About San José
CountryCosta Rica
RegionCentral Valley
Population335,007
ContinentNorth America & Caribbean
Time zoneAmerica/Costa_Rica (-06:00)
Latitude9.9330°
Longitude-84.0830°
Air QualityModerate (AQI 55)
Details & indices
UV index
11 — Very high
High today
Air Quality
Moderate
AQI 55 · US EPA
Sun & moon
Sunrise5:30 AM
Sunset5:11 PM
Length of day11h 41m
Moonrise9:26 AM
Moonset9:11 PM
Moon phase🌔 Waxing Crescent
Local time8:34 AM (-06:00)
San José climate in September
8-year averages · when to visit
Best months: January–December · September: Good
|
August |
September |
October |
| Average temperature |
→ 20°C |
20°C |
▼ 19°C |
| Typical high |
→ 25°C |
25°C |
▼ 24°C |
| Typical low |
▼ 17°C |
16°C |
→ 16°C |
| Precipitation |
▲ 413 mm |
453 mm |
▲ 547 mm |
| Wet days |
▲ 27 d |
29 d |
→ 29 d |
| Humidity |
▲ 83% |
88% |
▲ 89% |
| Sunshine per day |
▼ 8.6 h |
8.2 h |
▼ 7.9 h |
| Cloud cover |
▲ 30% |
32% |
▲ 34% |
| Midday UV |
→ 12 |
12 |
▼ 11 |
| Daylight |
12:26 |
12:10 |
11:54 |
| Our take |
Good
|
Good
|
Good
|
September temperatures day by day daily mean + smoothed trend · °C
September precipitation day by day mm
September UV day by day clear-sky midday value
Figures are averaged over 8 years of ERA5 reanalysis; sea temps come from ocean reanalysis, and UV is derived from solar elevation.
More destinations in North America & Caribbean
San José, Costa Rica · 9.93°N, 84.08°W · America/Costa_Rica · Forecast computed for these exact coordinates