San José in september: average Weather, Temperature and Climate
Weather in San José in september 2025
The weather in San Jose in september comes from statistical datas on the last years. You can view the weather statistics the entire month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
very bad weather
Weather at 6am
63°F
Moderate rain at times
30% of time
27%
15%
15%
Weather at 12pm
76°F
Moderate rain at times
48% of time
40%
6%
4%
Weather at 6pm
68°F
Heavy rain
85% of time
12%
3%
2%
Weather at 3am
63°F
38%
26%
17%
13%
Evolution of daily average temperature and precipitation in San José in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in San José in september.
The climate of San José in september is very bad
The climate in september in San Jose is wet (with 33.5in of precipitation over 28 days). It should be noted an improvement from the previous month since in august it receives an average of 31.5in of rainfall over 26 days.
The climate enjoyable in this location september. The thermometer averaged maximum of 77°F. The seasonal minimum is 63°F. Thus, the mean temperature average in september in San Jose is 70°F. These temperatures are far removed from those records observed in San Jose in the month of september with a maximum record of 83°F in 2012 and a minimum record of 54°F in 2020.
Day length in San Jose in september is 12:11. The sun rises at 05:26 and sets at 17:37.
September: another location in Costa Rica?
If you want to go to Costa Rica in september, there are destinations with better weather than San José:
In september, Puerto Limón, Tortuguero, Manzanillo, Bananito Sur, Parc international La Amistad and Parismina have good weather.
Finally, La Cruz, Tamarindo, Esterillos, Parque Nacional Carara, Playa Arenillas and Playa Flamingo (Guanacaste) have a tolerable climate, but better than San José.
Seasonal average climate and temperature of San José in september
Check below seasonal norms These datas are set from the weather statements of the past years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 70°F | ||||
| Highest temperature | 77°F | ||||
| Lowest temperature | 63°F | ||||
| Highest record temperature | 83°F (2012) | ||||
| Lowest record temperature | 54°F (2020) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Wind | |||||
| Wind speed | 7km/h | ||||
| Wind temperature | 63°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 33.5in | ||||
| Number of days with rainfall | 28 day(s) (95%) | ||||
| Record daily rainfall | 6.2in (2009) | ||||
| Other climate data | |||||
| Humidity | 95% | ||||
| Visibility | 6.78km | ||||
| Cloud cover | 63% | ||||
| UV index | 5 | ||||
| Daily sunshine hours | 10 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:26 | ||||
| Time of sunset | 17:37 | ||||
| Length of day | 12:11 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | very bad | ||||
How was the weather last september?
Here is the day by day recorded weather in San José in september 2024:
58°F to 74°F
56°F to 74°F
58°F to 74°F
58°F to 76°F
58°F to 79°F
59°F to 74°F
59°F to 74°F
58°F to 72°F
58°F to 74°F
58°F to 76°F
59°F to 77°F
65°F to 76°F
58°F to 77°F
58°F to 77°F
58°F to 81°F
61°F to 77°F
58°F to 77°F
65°F to 77°F
59°F to 74°F
58°F to 74°F
58°F to 70°F
58°F to 68°F
58°F to 72°F
58°F to 70°F
58°F to 68°F
56°F to 76°F
58°F to 72°F
56°F to 76°F
58°F to 72°F
58°F to 72°F
Map: other cities in Costa Rica in september
Cities near San José:
| Escazu in september | very bad weather |
| Heredia in september | very bad weather |
| Alajuela in september | very bad weather |
| Cartago in september | very bad weather |
| Tejar in september | very bad weather |
| Paraiso in september | very bad weather |
| Volcán Irazu in september | very bad weather |
| Atenas in september | very bad weather |
| Parque Nacional Braulio Carrillo in september | very bad weather |
| Volcán Poás in september | very bad weather |
| Naranjo in september | very bad weather |
| Parque Nacional Tapantí in september | very bad weather |
Click over cities on the map for information about the weather in september.
San José
perfect weather
good
tolerable
bad
very bad
Weather data for San José in september:
Weather data for San José for september are derived from an average of the weather forecast since 2009 in San José. There is a margin of error and these forecasts are to be considered as general information only. The weather in San José can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to San José.