Barometric pressure in Columbus
Pressure has spent the past day rising slowly. It stands 3 hPa higher than it did at this time yesterday. There is more to come: it climbs until Tuesday morning.
Sea level reading, as of 11:00 local time.
The past week and the days ahead
The shaded part shows the days already gone. The thicker line is the forecast.
The week ahead
Each day at a glance: how far pressure moves, and the low and high it reaches.
Edges up slowly through the day.
24° / 16°1.2 mmlow 1013 · high 1016 hPa
Edges up slowly through the day.
24° / 14°low 1015 · high 1018 hPa
Climbs in the morning, then settles back.
25° / 14°low 1017 · high 1021 hPa
Falls steadily through the day.
28° / 15°low 1013 · high 1018 hPa
Barely moves all day.
29° / 19°low 1011 · high 1013 hPa
Rises steadily through the day.
28° / 19°low 1014 · high 1018 hPa
Climbs in the morning, then settles back.
30° / 18°low 1017 · high 1021 hPa
Hour by hour
| Hour | Weather and temperature | Rain (mm) | Pressure (hPa) |
|---|---|---|---|
| 00:00 |  19° | 1013 | |
| 01:00 | 18° | 1013 | |
| 02:00 | 18° | 1013 | |
| 03:00 | 17° | 1013 | |
| 04:00 | 17° | 1013 | |
| 05:00 | 17° | 1014 | |
| 06:00 | 17° | 1014 | |
| 07:00 | 16° | 1014 | |
| 08:00 | 17° | 1015 | |
| 09:00 | 18° | 1015 | |
| 10:00 | 20° | 1016 | |
| 11:00 | 21° | 1016 | |
| 12:00 | 22° | 1016 | |
| 13:00 | 23° | 1015 | |
| 14:00 |  23° | 1015 | |
| 15:00 | 23° | 0.2 | 1014 |
| 16:00 | 24° | 0.2 | 1014 |
| 17:00 | 23° | 0.2 | 1014 |
| 18:00 | 22° | 0.2 | 1014 |
| 19:00 | 21° | 0.2 | 1014 |
| 20:00 | 21° | 0.2 | 1014 |
| 21:00 | 20° | 1014 | |
| 22:00 | 19° | 1015 | |
| 23:00 | 19° | 1015 |
Wednesday has the week's biggest move: down 6 hPa.
Pressure tops out near 1021 hPa on Tuesday morning, and falls after that.
Columbus sits 231 m above sea level, so a barometer in the city reads about 27 hPa lower than the sea-level figure. A home station set to the local reading should show about 989 hPa as of 11:00.
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 Columbus.
About Columbus
Columbus spends a full third of the year under high pressure, above 1020 hPa on about 122 days. The action comes in between those settled spells. About 52 abrupt daily changes come each year, most of them from December through March. Steady runs seldom last five days in any season. The monthly averages are tame by comparison, spanning only about 6 hPa from February to June. At about 227 m of elevation, the city's own reading runs some 26 hPa below the published sea-level values.
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 Columbus, 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 Columbus, which stands 231 m above sea level, is in the note above: about 27 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.
