The weather in the Irazú Volcano is very unstable.
If you are planning visiting the Irazu Volcano, it is important that you take into consideration that the weather is very changeable there, sometimes the fog makes it impossible to see the crater properly. But neither, it will not always be cloudy.
Occasionally it might be completely cloudy and at any moment the sky clears having the opportunity to see the majestic crater of the Volcano. Or sometimes the sky is clear and in minutes it could be completely cloudy.
There is more opportunity to have a good weather in the mornings.
Observing the crater with a clear weather is an unforgettable experience, in addition to the journey to the volcano there are many majestic landscapes for which it is worth making the trip. It is important that you always bring a coat because almost always the weather is very cold, you could also bring some waterproof coat or coat because it could rain. The dry season in Costa Rica is usually from (December to April) and the rainy season would be from (May to November).
If you are booking a guided tour to Irazú Volcano because someone guarantees that the volcano will be clear. Please, do not believe it, because that is very difficult to predict.
The vegetation of the park is mostly páramo that has survived the ash eruptions and the acidity of the land. Once we get away from the crater you can see secondary forest.
The wildlife in the Irazu Volcano is very scarce. One of the animals that frequent the national park and have become accustomed to humans are the coatis.
The Irazú Volcano is the highest active volcano in Costa Rica, with an altitude of 3,432 above sea level. It is very easy to visit from San José, there is access by road to the volcano. This beautiful volcano is a popular tourist spot in Costa Rica, visited by thousands of tourists every year.
You can see here the exact location of the Irazu Volcano on the map. https://goo.gl/maps/24767STWkZcMqKQx7