September in San José brings very high temperatures around 33°C (91°F) during the day, dropping to 24°C (75°F) at night, with the most rainfall of the year.
September in San José can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Min Temperature
Max Temperature
Chance of Rain
Precipitation
Rainy days
Pick a month to see the average temperature, rainfall and sunshine in San José - and find the best time to visit.
Find out more about the weather in Guatemala and which places have the best travel conditions in this month. See all of Guatemala in September →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Hot weather in September means keeping cool is the priority. Loose-fitting clothes in natural fabrics work best. Pack plenty of shorts, tank tops, and breathable shirts. Don't forget a hat, swimwear, and comfortable sandals. Heavy rain is guaranteed, please bring a good poncho and waterproof everything!
We rated the following activities from 1 (least suitable) to 10 (best) to do.
See the full San José climate overview or explore weather in Guatemala.
Where to go in September - average daytime high across popular destinations.
Flores
34°C (93°F) Rio Dulce Town32°C (90°F) Lívingston32°C (90°F) Cobán27°C (81°F) Guatemala City27°C (81°F) Antigua Guatemala25°C (77°F) Quetzaltenango22°C (72°F) Panajachel23°C (73°F) Need travel inspiration? Check out our bucket list articles and be inspired.
Lake Atitlan: the most beautiful lake in the world
At Lake Atitlan you will be enchanted by beautiful volcanoes, amazing sunsets and the serene tranquility. Mix this with the vibrant Mayan community and you'll understand why Atitlan has something magical.
The top 5 unexplored rainforests in Central America
Dive into Central America's top 5 hidden rainforests for an unparalleled journey through vibrant wildlife and diverse landscapes.
The 5 most beautiful lakes in Canada
Explore Canada's stunning lakes: Lake Louise, Lake Superior, Maligne Lake, Emerald Lake, and Lake Okanagan, each offering unique beauty and activities.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
