AHSCA climate is Tropical monsoonal climate. It lies primarily on the equator in the regional Intertropical Convergence Zone (ITCZ). While the islands see abundant sunshine and annual warm temperatures, it also receives a high frequency of thunderstorms year round. AHSCA is one of the wettest climates on the planet with an average 11,777 millimeters (463.7 in) or precipitation.
AHSCA's winter months are it's driest but it's summer months see the monsoon season. From the months of Late October-February the monsoon season begins. With it comes a frequency of storms and rougher seas and increased precipitation. Monsoonal storms are long lasting, very wet and range in intensity from moderate to intense. AHSCA doesn't see many hurricanes during this period but still can receive a few if wind patterns change enough to allow a passing storm to change course.
Given it's remote location and absence of major landmasses in an immediate radius, the open seas are generally more intense with swifter currents. The islands have an average temperature of 82.4°F (28 °C) throughout the year, with an average minimum temperature of 19°C (66.9°F) and maximum of 32°C (89.6°F).
In AHSCA, tropical cyclones are designated as hurricanes, compare to its neighbors which use the terms, Typhoon or Cyclone. Unlike most others, AHSCA does not designate hurricanes with names due to the frequency and culture custom against it. Tracking has typically been done by sailors and in recent years awareness and tracking has fallen under the United Island Office of Meteorology which employs a combination of modern storm tracking technology, (such as Doppler) and storm trackers out to sea.
Around 19 tropical cyclones or storms enter the AHSCA Area of Responsibility in a typical year and of these usually 6 to 9 make landfall. The deadliest overall tropical cyclone to impact the AHSCA Islands is believed to have been the 1881 Aurora Storm which is estimated to have killed up to 20,000 people as it passed over the archipelago in September 1881.
In modern meteorological records, the deadliest storm was the 2009 storm which became the strongest land falling tropical cyclone ever recorded as it crossed the chain in January of 2009. The wettest known tropical cyclone to impact the archipelago was the July 28–August 1, 2014 cyclone which dropped over 2,210 millimeters (87 in) of rainfall within a 3-day,15-hour period in Corona.
While common meteorological convention names major tropical storms, AHSCA never has named storms since it's inception as a full nation state as cultural customs and traditions feel naming storms is an affront to the Goddesses who make them . Occasionally storms have been designated by era (Great Storm of the Era of Shino) but there is no standard.
On an annual time scale, activity reaches a minimum in May, before increasing steadily through June, and spiking from July through September, with August being the most active month for tropical cyclones in AHSCA Activity falls off significantly in October. The most active season, since 1945, for tropical cyclone strikes on the island archipelago was 2012 when nineteen tropical cyclones moved through the country. There was only one tropical cyclone which moved through the islands in 2014 while 2017 saw an above average rate.
Storms have usually been tracked out by sailors camping out in areas prone to storm development returning to give warning. With recent international aid, radar and areal tracking have become additional methods to warn of coming storms. Still with lack of telecommunication infrastructure, warning is still limited to word of mouth warnings from storm tracking sailors, police and army officials. Reaching rural and remote villages can be difficult still leading to high casualties from destructive storms.