Miyakojima
宮古島24°48′ N 125°17′ EJMA1991-202020.6 to 22.8 °C
Table view
| Month | High °C | Low °C | Mean °C | Sea °C | Rain mm | Rain days | Sun h | Humidity % | Wind | m/s |
|---|---|---|---|---|---|---|---|---|---|---|
| Jan | 20.6 | 16.3 | 18.3 | 23.5 | 138.8 | 12.3 | 85.5 | 72 | NNE | 4.9 |
| Feb | 21.1 | 16.6 | 18.6 | 23 | 119.8 | 10.8 | 90.3 | 74 | NNE | 4.8 |
| Mar | 22.8 | 17.9 | 20.1 | 23.3 | 138.7 | 10.9 | 116 | 76 | NNE | 4.6 |
| Apr | 25.1 | 20.4 | 22.5 | 24.4 | 148.7 | 9.9 | 122.9 | 79 | S | 4.4 |
| May | 27.7 | 23 | 25 | 26.1 | 222.3 | 10.7 | 149.3 | 82 | S | 4 |
| Jun | 30.3 | 25.7 | 27.7 | 27.9 | 194.7 | 9.8 | 191.9 | 84 | SSW | 4.5 |
| Jul | 31.7 | 26.8 | 28.9 | 29.3 | 151.6 | 9.3 | 241 | 80 | SSW | 4.4 |
| Aug | 31.3 | 26.5 | 28.6 | 29.3 | 257.4 | 12.2 | 210.9 | 81 | S | 4.2 |
| Sep | 30.1 | 25.6 | 27.6 | 28.7 | 259.3 | 11.2 | 179.3 | 79 | NE | 4.6 |
| Oct | 27.8 | 23.8 | 25.5 | 27.5 | 157.9 | 10 | 151.9 | 75 | NE | 5.3 |
| Nov | 25.3 | 21.3 | 23.1 | 26.1 | 139.8 | 10.9 | 112.3 | 74 | NE | 5.2 |
| Dec | 22.2 | 18.2 | 20 | 24.6 | 147.2 | 11.9 | 92.7 | 71 | NNE | 5.3 |
Reading the seasons
Station
JMA's Miyakojima observatory (block 47927) stands 38.5 m above sea level in Hirara. Every figure in this file is JMA's published 1991–2020 normal, and rain days count the days with 1 mm or more.
Winter
North-north-east is the most frequent wind at Miyakojima from December to March. It averages 5.3 m/s in December and eases to 4.6 m/s by March. Days when the strongest wind reaches 10 m/s drop from 4.8 in December to 2.6 in February. February averages a high of 21.1 °C and a low of 16.6 °C, and its 119.8 mm of rain falls over 10.8 days.
Spring
In early spring a low from the East China Sea sometimes deepens fast as it crosses Okinawa. Once its cold front passes, a southerly wind swings round to a strong north or north-east wind and the temperature drops. Okinawans have long called this *ningwachi kajimaai* (the wind turn of the second lunar month).
Summer
When the rainy season ends in late June the Pacific high pushes west and a strong south to south-west wind called *kaachiibee* blows steadily for several days. Miyakojima's most frequent wind from April to August comes from the south or south-south-west.
Typhoon
JMA counts a typhoon as approaching the Okinawa region when its centre comes within 300 km of a station there, and the 1991–2020 normal is 7.7 approaches a year. August averages 2.2 approaches and September 1.9. Across those 30 years JMA recorded no approach at all from January to March.
Rainy
JMA's 1991–2020 average puts the start of Okinawa's rainy season around 10 May and its end around 21 June. JMA's preliminary dates for 2026 were around 4 May and around 29 June. Okinawans call the season *suuman boosuu* after two of the old solar terms that fall inside it.
Sea
Sea temperatures are our monthly averages of JMA's daily 1991–2020 sea surface normals at its fixed point south of Miyako-jima (宮古島南). The monthly figure runs from 23.0 °C in February up to 29.3 °C in July.
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.
Quick answers about Miyakojimaよくある質問
What is the weather like in Miyakojima in January to March?
In January to March, Miyakojima averages daily highs of 20.6 to 22.8 °C and lows of 16.3 to 17.9 °C, with 120 to 139 mm of rain a month, by the Japan Meteorological Agency's 1991-2020 normals. The most frequent wind in January comes from the NNE at a mean 4.9 m/s.
Which month is warmest in Miyakojima?
July is the warmest month in Miyakojima, with an average daily high of 31.7 °C, by the Japan Meteorological Agency's 1991-2020 normals.
Which month is wettest in Miyakojima?
September is the wettest month in Miyakojima, with 259.3 mm of rain on average, by the Japan Meteorological Agency's 1991-2020 normals.