Yoronjima (AMeDAS)
与論島27°03′ N 128°24′ EJMA1991-202019.1 to 21.1 °C
Table view
| Month | High °C | Low °C | Mean °C | Sea °C | Rain mm | Rain days | Wind | m/s |
|---|---|---|---|---|---|---|---|---|
| Jan | 19.1 | 14.3 | 16.8 | 22.2 | 86.4 | 11 | NNW | 5.9 |
| Feb | 19.8 | 14.9 | 17.3 | 21.4 | 98.9 | 10.1 | NNW | 5.6 |
| Mar | 21.1 | 15.9 | 18.3 | 21.5 | 140.9 | 12.1 | NNW | 5.6 |
| Apr | 23.3 | 18.2 | 20.6 | 22.3 | 144 | 10.4 | N | 5 |
| May | 26 | 21.2 | 23.3 | 24.1 | 208.6 | 12.3 | E | 4.3 |
| Jun | 28.8 | 24.5 | 26.3 | 26.3 | 266.3 | 12.5 | S | 4.5 |
| Jul | 31.5 | 26.7 | 28.7 | 28.6 | 165.9 | 7.5 | S | 4.7 |
| Aug | 31.8 | 26.7 | 28.9 | 29 | 142.8 | 10.1 | ESE | 4.8 |
| Sep | 30.7 | 25.6 | 27.8 | 28.5 | 191.1 | 10.9 | ESE | 4.9 |
| Oct | 27.9 | 23.4 | 25.4 | 27.1 | 174.8 | 9.3 | N | 5.5 |
| Nov | 24.6 | 20.2 | 22.2 | 25.2 | 124.4 | 8.7 | N | 5.4 |
| Dec | 20.9 | 16.3 | 18.6 | 23.6 | 91.6 | 10.3 | N | 5.9 |
Reading the seasons
Station
Yoron's JMA station is the Yoronjima AMeDAS point (block 1277), 14 m above sea level in Yoron town. It has rain normals for the full 1991–2020 period. Its temperature and wind normals start in 2000 and cover 2000–2020. Sunshine and humidity are not measured there, so those columns stay empty. The nearest full station is Okinoerabu (block 47942) about 50 km to the north-east. Its 1991–2020 normals give 83.6 hours of sunshine in January and 87.3 in February, with humidity at 66% and 68%. Rain days count the days with 1 mm or more.
Winter
Yoron's winter wind comes most often from the north-north-west from January to March and from due north in December. It averages 5.6–5.9 m/s in those months, and the day's strongest wind reaches 10 m/s on 9.3 to 11.7 days a month. February averages a high of 19.8 °C and a low of 14.9 °C.
Typhoon
Yoron belongs to JMA's Amami forecast region, where a typhoon counts as approaching when its centre comes within 300 km of a station. The 1991–2020 normal for Amami is 4.3 approaches a year, with September the busiest month at 1.3. JMA recorded no approach to Amami from November to March in those 30 years.
Rainy
JMA's 1991–2020 average for the Amami region puts the start of the rainy season around 12 May and its end around 29 June. Its preliminary dates for 2026 were around 3 May and around 1 July.
Sea
Sea temperatures are our monthly averages of JMA's daily 1991–2020 sea surface normals for the coastal strip JMA calls 奄美群島沿岸南東部 (area 619). That strip runs along the south-east shores of the Amami islands from Tokunoshima down to Yoron. The monthly figure runs from 21.4 °C in February up to 29.0 °C in August.
Wind
The windDir field holds JMA's most frequent wind direction (最多風向) for each month as the 16-point compass point the wind blows from.
Period
1991–2020 (rain); 2000–2020 (temperature and wind)
Quick answers about Yoronjima (AMeDAS)よくある質問
What is the weather like in Yoronjima (AMeDAS) in January to March?
In January to March, Yoronjima (AMeDAS) averages daily highs of 19.1 to 21.1 °C and lows of 14.3 to 15.9 °C, with 86 to 141 mm of rain a month, by the Japan Meteorological Agency's 1991-2020 normals. The most frequent wind in January comes from the NNW at a mean 5.9 m/s.
Which month is warmest in Yoronjima (AMeDAS)?
August is the warmest month in Yoronjima (AMeDAS), with an average daily high of 31.8 °C, by the Japan Meteorological Agency's 1991-2020 normals.
Which month is wettest in Yoronjima (AMeDAS)?
June is the wettest month in Yoronjima (AMeDAS), with 266.3 mm of rain on average, by the Japan Meteorological Agency's 1991-2020 normals.