Ottawa Airport (YOW):
BAROMETRIC PRESSURE
RELATIVE HUMIDITY
Times in Eastern Daylight Time (EDT = GMT-4)
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LIVE OBSERVATIONS at Ottawa Airport (YOW) - Tuesday, September 1, 2026 at 06:00 EDT
TODAY: |
Tuesday |
Reading |
Time |
CTO |
RecHi |
YY |
RecLo |
YY |
|
Current Barometric Pressure: |
1016.0 |
mb |
|
n/a |
mb |
|
|
|
|
|
|
|
Maximum Today: |
1017.0 |
mb |
01:00 |
n/a |
mb |
1028.0 |
mb |
2019 |
|
|
|
|
Minimum: |
1016.0 |
mb |
02:16 |
n/a |
mb |
|
|
|
0.0 |
mb |
n/a |
|
| Mean: |
1016.5 |
mb |
|
n/a |
mb |
1025.0 |
mb |
2025 |
1009.0 |
mb |
2024 |
|
| |
Current Relative Humidity: |
96 |
% |
|
n/a |
% |
|
|
|
|
|
|
|
Maximum Today: |
97 |
% |
04:35 |
n/a |
% |
100 |
% |
2025 |
|
|
|
|
Minimum: |
87 |
% |
02:37 |
n/a |
% |
|
|
|
0 |
% |
n/a |
|
| Mean: |
92 |
% |
|
n/a |
% |
82 |
% |
2020 |
64 |
% |
2017 |
|
| |
|
YESTERDAY: |
Monday |
Reading |
Time |
CTO |
RecHi |
YY |
RecLo |
YY |
|
Maximum Barometric Pressure: |
1021.0 |
mb |
08:00 |
n/a |
mb |
1027.0 |
mb |
2018 |
|
|
|
|
Minimum: |
1017.0 |
mb |
20:00 |
n/a |
mb |
|
|
|
0.0 |
mb |
n/a |
|
| Mean: |
1019.0 |
mb |
|
n/a |
mb |
1024.5 |
mb |
2018 |
1004.5 |
mb |
2022 |
|
| |
Maximum Relative Humidity: |
100 |
% |
09:44 |
n/a |
% |
100 |
% |
2025 |
|
|
|
|
Minimum: |
64 |
% |
15:00 |
n/a |
% |
|
|
|
0 |
% |
n/a |
|
| Mean: |
82 |
% |
|
n/a |
% |
92 |
% |
2024 |
67 |
% |
2025 |
|
| |
|
TOMORROW: |
Wednesday |
|
RecHi |
YY |
RecLo |
YY |
|
Barometric Pressure: |
|
1024.0 |
mb |
2017 |
0.0 |
mb |
n/a |
|
| Daily Mean BP: |
|
1023.0 |
mb |
2017 |
1007.0 |
mb |
2020 |
|
| |
Relative Humidity: |
|
99 |
% |
2019 |
0 |
% |
n/a |
|
| Daily Mean BP: |
|
1023.0 |
% |
2017 |
1007.0 |
% |
2020 |
|
| |
|
THIS MONTH: |
Sep Means + Records |
Mean |
CTO |
RecHi |
YY |
RecLo |
YY |
|
| Monthly Mean BP: |
n/a |
mb |
n/a |
mb |
1021.5 |
mb |
2018 |
1013.8 |
mb |
2021 |
|
| |
| Monthly Mean RH: |
n/a |
% |
n/a |
% |
78 |
% |
2022 |
69 |
% |
2025 |
|
| |
|
Daily Extremes + Records |
Max |
DD |
Min |
DD |
RecHi |
YY-DD |
RecLo |
YY-DD |
|
Barometric Pressure: |
n/a |
mb |
n/a |
n/a |
mb |
n/a |
1038.0 |
mb |
2020-21 |
0.0 |
mb |
n/a-n/a |
|
| Daily Mean BP: |
n/a |
mb |
n/a |
n/a |
mb |
n/a |
1033.5 |
mb |
2020-20 |
1000.0 |
mb |
2017-05 |
|
| |
Relative Humidity: |
n/a |
% |
n/a |
n/a |
% |
n/a |
100 |
% |
2017-04 |
0 |
% |
n/a-n/a |
|
| Daily Mean RH: |
n/a |
% |
n/a |
n/a |
% |
n/a |
100 |
% |
2017-18 |
48 |
% |
2017-17 |
|
| |
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LAST MONTH: |
Aug Means + Records |
Mean |
CTO |
RecHi |
YY |
RecLo |
YY |
|
| Mean Barometric Pressure: |
1014.3 |
mb |
1013.6 |
mb |
1018.8 |
mb |
2025 |
1012.7 |
mb |
2020 |
|
| |
| Mean Relative Humidity: |
77 |
% |
69 |
% |
79 |
% |
2024 |
68 |
% |
2025 |
|
| |
|
Daily Extremes + Records |
Max |
DD |
Min |
DD |
RecHi |
YY-DD |
RecLo |
YY-DD |
|
Barometric Pressure: |
1025.0 |
mb |
15 |
1003.0 |
mb |
03 |
1032.0 |
mb |
2025-06 |
0.0 |
mb |
n/a-n/a |
|
| Daily Mean BP: |
1023.5 |
mb |
15 |
1007.5 |
mb |
23 |
1030.0 |
mb |
2025-06 |
999.5 |
mb |
2020-29 |
|
| |
Relative Humidity: |
100 |
% |
08 |
41 |
% |
20 |
100 |
% |
2017-01 |
0 |
% |
n/a-n/a |
|
| Daily Mean RH: |
92 |
% |
02 |
66 |
% |
15 |
100 |
% |
2017-04 |
56 |
% |
2025-01 |
|
| |
|
NEXT MONTH: |
October Monthly Records |
|
RecHi |
YY |
RecLo |
YY |
|
| Mean Barometric Pressure: |
|
1019.3 |
mb |
2025 |
1014.3 |
mb |
2021 |
|
| |
| Mean Relative Humidity: |
|
81 |
% |
2021 |
69 |
% |
2022 |
|
| |
|
October Daily Records |
|
RecHi |
YY-DD |
RecLo |
YY-DD |
|
Barometric Pressure: |
|
1038.0 |
mb |
2022-28 |
0.0 |
mb |
n/a-n/a |
|
| Daily Mean BP: |
|
1035.5 |
mb |
2022-28 |
979.0 |
mb |
2017-30 |
|
| |
Relative Humidity: |
|
100 |
% |
2017-03 |
0 |
% |
n/a-n/a |
|
| Daily Mean RH: |
|
100 |
% |
2017-07 |
42 |
% |
2024-28 |
|
| |
|
THIS YEAR: |
2026 Means + Records |
Mean |
CTO |
RecHi |
YY |
RecLo |
YY |
|
| Annual Mean BP: |
1014.6 |
mb |
1013.9 |
mb |
13545939.2 |
mb |
2013 |
-121942637.6 |
mb |
2013 |
|
| |
| Annual Mean RH: |
70 |
% |
67 |
% |
134532195 |
% |
2013 |
-1225007104 |
% |
2056 |
|
| |
|
Monthly Extremes + Records |
Max |
MM |
Min |
MM |
RecHi |
YY-MM |
RecLo |
YY-MM |
|
| Monthly Mean BP: |
1017.3 |
mb |
Mar |
1011.9 |
mb |
Jun |
170199997.2 |
mb |
2016-Sep |
-108179039.6 |
mb |
2015-Jan |
|
| |
| Monthly Mean RH: |
77 |
% |
Aug |
63 |
% |
May |
1881171822 |
% |
2016-Sep |
-1225804048 |
% |
2015-Feb |
|
| |
|
Daily Extremes + Records |
Max |
MM-DD |
Min |
MM-DD |
RecHi |
Date |
RecLo |
Date |
|
Barometric Pressure: |
1041.0 |
mb |
Jan-24 |
988.0 |
mb |
Mar-16 |
13554508.8 |
mb |
2014-01-31 |
-122673840.8 |
mb |
2014-01-31 |
|
| Daily Mean BP: |
1037.5 |
mb |
Jan-24 |
996.5 |
mb |
Mar-16 |
13554518.4 |
mb |
2014-01-31 |
0.0 |
mb |
2014-01-31 |
|
| |
Relative Humidity: |
100 |
% |
Apr-16 |
17 |
% |
Apr-23 |
100 |
% |
2015-03-15 |
-1224780080 |
% |
2014-01-31 |
|
| Daily Mean RH: |
96 |
% |
Apr-15 |
38 |
% |
Apr-23 |
100 |
% |
2015-12-02 |
-1081677968 |
% |
2056-01-31 |
|
| |
|
LAST YEAR: |
2025 Means |
Mean |
CTO |
|
| Annual Mean BP: |
1015.2 |
mb |
1014.4 |
mb |
|
| |
| Annual Mean RH: |
72 |
% |
67 |
% |
|
|
Monthly Extremes |
Max |
MM |
Min |
MM |
|
| Monthly Mean BP: |
1019.3 |
mb |
Oct |
1010.6 |
mb |
Mar |
|
| |
| Monthly Mean RH: |
80 |
% |
Nov |
66 |
% |
Apr |
|
|
Daily Extremes |
Max |
MM-DD |
Min |
MM-DD |
|
Barometric Pressure: |
1037.0 |
mb |
Feb-01 |
985.0 |
mb |
Dec-19 |
|
| Daily Mean BP: |
1033.0 |
mb |
Oct-09 |
985.0 |
mb |
Oct-31 |
|
| |
Relative Humidity: |
100 |
% |
Jan-01 |
18 |
% |
Apr-17 |
|
| Daily Mean RH: |
100 |
% |
Jul-07 |
40 |
% |
May-11 |
|
| |
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