Atenas in september: average Weather, Temperature and Climate
Weather in Atenas in september 2025
The weather in Atenas in the month of september comes from statistical datas on the last years. You can view the weather statistics for all the month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
very bad weather UV index: 6
Weather at 6am
68°F
Partly Cloudy
27% of time
23%
21%
20%
Weather at 12pm
81°F
Moderate rain at times
41% of time
28%
25%
6%
Weather at 6pm
72°F
Heavy rain
84% of time
12%
3%
2%
Weather at 3am
68°F
32%
24%
17%
17%
Evolution of daily average temperature and precipitation in Atenas in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Atenas in september.
The climate of Atenas in september is very bad
The weather in september in Atenas is wet (with 27.9in of precipitation over 28 days). The weather is worst than the previous month since in august there is an average of 24.8in of precipitation over 24 days.
The climate good in that locality september. Temperatures are up to 81°F. On average, the recorded minimum temperature is 68°F. Thus, the mean temperature average on this month of september in Atenas is 74°F. Note that seasonal normals in contrast with those observed in Atenas in september with a maximum record of 86°F in 2016 and a minimum record of 63°F in 2009.
On average, in Atenas, the days of september last 12:10. The sun rises at 05:28 and sunset is at 17:38.
September: another location in Costa Rica?
If you want to go to Costa Rica in september, there are destinations with better weather than Atenas:
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 Atenas.
Seasonal average climate and temperature of Atenas in september
Check below seasonal norms These statistics are compiled from the weather statements of the last years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 74°F | ||||
| Highest temperature | 81°F | ||||
| Lowest temperature | 68°F | ||||
| Highest record temperature | 86°F (2016) | ||||
| Lowest record temperature | 63°F (2009) | ||||
| Number of days at +86°F | 0 day(s) (0%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Wind | |||||
| Wind speed | 6km/h | ||||
| Wind temperature | 68°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 27.9in | ||||
| Number of days with rainfall | 28 day(s) (93%) | ||||
| Record daily rainfall | 5.4in (2009) | ||||
| Other climate data | |||||
| Humidity | 93% | ||||
| Visibility | 7.26km | ||||
| Cloud cover | 50% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:28 | ||||
| Time of sunset | 17:38 | ||||
| Length of day | 12:10 | ||||
| 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 Atenas in september 2024:
67°F to 77°F
65°F to 76°F
67°F to 76°F
67°F to 77°F
67°F to 81°F
68°F to 76°F
68°F to 79°F
67°F to 76°F
68°F to 76°F
67°F to 79°F
68°F to 77°F
68°F to 77°F
67°F to 81°F
67°F to 77°F
67°F to 83°F
68°F to 79°F
68°F to 79°F
68°F to 79°F
68°F to 76°F
68°F to 76°F
67°F to 72°F
67°F to 70°F
67°F to 74°F
67°F to 72°F
67°F to 68°F
65°F to 79°F
67°F to 76°F
65°F to 79°F
67°F to 74°F
67°F to 74°F
Map: other cities in Costa Rica in september
Cities near Atenas:
| Naranjo in september | very bad weather |
| Desamparados in september | very bad weather |
| San Ramon in september | very bad weather |
| Orotina in september | very bad weather |
| Alajuela in september | very bad weather |
| Escazu in september | very bad weather |
| Heredia in september | very bad weather |
| Volcán Poás in september | very bad weather |
| Tejar in september | very bad weather |
| Esparza in september | very bad weather |
| San José in september | very bad weather |
| Parque Nacional Carara in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Atenas
perfect weather
good
tolerable
bad
very bad
Weather data for Atenas in september:
Weather data for Atenas for september are derived from an average of the weather forecast since 2009 in Atenas. There is a margin of error and these forecasts are to be considered as general information only. The weather in Atenas 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 Atenas.