Barometric pressure in Helsinki
Air pressure has barely moved since this time yesterday. From here it heads up until Thursday morning.
Sea level reading, as of 18:00 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.
Rises quickly, most of it in the afternoon.
17° / 15°8.4 mmlow 991 · high 1006 hPa
Rises steadily through the day.
19° / 13°0.6 mmlow 1006 · high 1014 hPa
Rises steadily through the day.
20° / 12°low 1014 · high 1021 hPa
Rises steadily through the day.
21° / 11°low 1022 · high 1026 hPa
Barely moves all day.
20° / 11°low 1026 · high 1027 hPa
Falls steadily through the day.
19° / 12°low 1020 · high 1026 hPa
Falls steadily through the day.
19° / 15°low 1012 · high 1020 hPa
Hour by hour
| Hour | Weather and temperature | Rain (mm) | Pressure (hPa) |
|---|---|---|---|
| 00:00 |  15° | 1.2 | 994 |
| 01:00 | 15° | 1.1 | 993 |
| 02:00 | 15° | 1.1 | 992 |
| 03:00 | 15° | 1.1 | 992 |
| 04:00 | 15° | 0.6 | 991 |
| 05:00 | 15° | 0.6 | 991 |
| 06:00 | 15° | 0.6 | 991 |
| 07:00 | 15° | 0.3 | 992 |
| 08:00 | 15° | 0.3 | 992 |
| 09:00 | 15° | 0.3 | 993 |
| 10:00 | 15° | 0.2 | 994 |
| 11:00 | 15° | 0.2 | 995 |
| 12:00 | 16° | 0.2 | 996 |
| 13:00 | 16° | 0.1 | 997 |
| 14:00 | 17° | 0.1 | 998 |
| 15:00 | 17° | 0.1 | 999 |
| 16:00 | 17° | 0.1 | 1000 |
| 17:00 | 17° | 0.1 | 1001 |
| 18:00 | 16° | 0.1 | 1002 |
| 19:00 | 16° | 1003 | |
| 20:00 | 16° | 1004 | |
| 21:00 | 16° | 1004 | |
| 22:00 | 15° | 1005 | |
| 23:00 | 15° | 1006 |
Biggest change: today, up 12 hPa.
The high point comes on Thursday morning, near 1027 hPa; after that it falls.
Helsinki is at sea level, so a barometer there reads about the same as the sea-level figure.
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 Helsinki.
About Helsinki
In Helsinki the pressure is at its lowest in January, averaging about 1009 hPa, and winter is the busiest season for the roughly 72 big daily changes the year brings. About 47 days annually fall below 1000 hPa. By September the picture has reversed, and the average pressure stands at its yearly peak, near 1017 hPa. On the shore of the Gulf of Finland, the city lies essentially at sea level. Its own readings and the published sea-level values are practically the same number.
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 Helsinki, 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. Weather services correct readings to what they would be at sea level, so that cities can be compared. Helsinki is at sea level, so there is almost nothing to correct and the two figures agree.
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.
