Barometric pressure in Naha
Beneath its daily wave, pressure has barely moved. From here it falls until early on Wednesday.
Sea level reading, as of 00:00 local time.
The past week and the days ahead
The shaded part shows the days already gone. The thicker line is the forecast. The thin grey line is the average over a whole day, so you can see where pressure is heading under the daily up and down.
The week ahead
Each day at a glance: how far pressure moves, and the low and high it reaches.
Eases down slowly through the day.
30° / 27°0.6 mmlow 1007 · high 1011 hPa
Falls very rapidly, most of it in the evening.
30° / 27°40.4 mmlow 965 · high 1008 hPa
Rises very rapidly, most of it overnight.
29° / 26°63.9 mmlow 962 · high 1004 hPa
Rises steadily through the day.
30° / 26°1.9 mmlow 1002 · high 1007 hPa
Edges up slowly through the day.
30° / 26°4.5 mmlow 1006 · high 1009 hPa
Barely moves all day.
30° / 26°0.9 mmlow 1007 · high 1009 hPa
Still barely moving.
30° / 26°0.6 mmlow 1007 · high 1008 hPa
Hour by hour
| Hour | Weather and temperature | Rain (mm) | Pressure (hPa) |
|---|---|---|---|
| 00:00 |  27° | 1011 | |
| 01:00 | 27° | 1010 | |
| 02:00 | 27° | 1010 | |
| 03:00 | 27° | 1009 | |
| 04:00 | 27° | 1009 | |
| 05:00 |  27° | 1009 | |
| 06:00 |  27° | 1009 | |
| 07:00 | 27° | 0.1 | 1009 |
| 08:00 | 27° | 0.1 | 1010 |
| 09:00 | 28° | 0.1 | 1010 |
| 10:00 | 28° | 0.1 | 1010 |
| 11:00 | 29° | 0.1 | 1010 |
| 12:00 | 30° | 0.1 | 1009 |
| 13:00 | 30° | 1009 | |
| 14:00 |  30° | 1008 | |
| 15:00 | 30° | 1008 | |
| 16:00 | 29° | 1007 | |
| 17:00 | 29° | 1007 | |
| 18:00 | 29° | 1007 | |
| 19:00 | 28° | 1008 | |
| 20:00 | 28° | 1008 | |
| 21:00 | 28° | 1008 | |
| 22:00 | 27° | 1009 | |
| 23:00 |  27° | 1008 |
Of the seven days, Tuesday moves most: down 43 hPa.
The low point comes early on Wednesday, near 962 hPa; after that it rises.
Naha has a strong daily rhythm: pressure swings about 2 hPa between a regular low and high, at almost the same hours each day. Most of what the graph shows is that daily wave, which is why the change since yesterday says more here than the change over a few hours.
Naha sits 13 m above sea level, so a barometer in the city reads about 2 hPa lower than the sea-level figure. A home station set to the local reading should show about 1009 hPa as of 00:00.
The hours already past are the model's record of each hour as it passed, anchored to real observations, though not a reading from an instrument in Naha.
About Naha
Naha's pressure divides the year in two: a high, settled winter, with January averaging about 1021 hPa, and a long, low summer near 1008 in July. From one day to the next, the pressure hardly moves. Sudden moves appear barely twice a year, and the pressure can stay steady for more than a week. The exception comes in the warm season, when a passing storm can do more to the pressure in a day than the seasons do in a month. So the pressure is calm most of the year, with one short stormy season.
Sources: WikipediaERA5 reanalysisElevation: Copernicus DEM via Open-Meteo
Cities nearby
Open one to see its pressure, or search for your own city at the top of the page.
Out in the sun today? Check the UV level in Naha, on our sister site 
uvi.today.
Common questions
What is a normal barometric pressure?
Near 1013 hPa at sea level; the exact standard figure, 1013.25 hPa, is the same as 760 mmHg, 29.92 inHg or 101.3 kPa. Anything between roughly 1000 and 1025 hPa is ordinary. Which way it is going matters far more than the number itself.
Why does my own barometer show a different number?
Usually altitude, and sometimes the instrument itself. Weather services correct readings to what they would be at sea level, so that cities can be compared. The figure for Naha, which stands 13 m above sea level, is in the note above: about 2 hPa below the sea-level reading. If your barometer is already set to sea level and still reads slightly differently, that is the setting on the instrument rather than the weather.
Is a millibar the same as a hectopascal?
Yes. One millibar and one hectopascal are exactly the same amount of pressure, so 1013 mbar and 1013 hPa mean the same thing. The name changed; the number did not.
Does falling pressure mean rain?
Not by itself. Away from the tropics, falling pressure usually means a low is approaching, and lows carry the fronts that bring cloud and rain, so the two often arrive together. But a shallow fall can pass with nothing more than cloud, and rain falls under steady pressure too. The graph tells you a system is on the way, not how wet it will be. The week ahead, just above, shows the rain forecast beside the pressure.
