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, August 11, 2026 at 07:00 EDT
TODAY: |
Tuesday |
Reading |
Time |
CTO |
RecHi |
YY |
RecLo |
YY |
|
Current Barometric Pressure: |
1011.0 |
mb |
|
1010.7 |
mb |
|
|
|
|
|
|
|
Maximum Today: |
1011.0 |
mb |
05:00 |
1010.7 |
mb |
1021.0 |
mb |
2025 |
|
|
|
|
Minimum: |
1010.0 |
mb |
01:00 |
1009.3 |
mb |
|
|
|
0.0 |
mb |
n/a |
|
| Mean: |
1010.5 |
mb |
|
1010.0 |
mb |
1019.5 |
mb |
2017 |
1009.5 |
mb |
2020 |
|
| |
Current Relative Humidity: |
99 |
% |
|
96 |
% |
|
|
|
|
|
|
|
Maximum Today: |
99 |
% |
05:00 |
97 |
% |
100 |
% |
2017 |
|
|
|
|
Minimum: |
95 |
% |
01:00 |
95 |
% |
|
|
|
0 |
% |
n/a |
|
| Mean: |
97 |
% |
|
96 |
% |
98 |
% |
2017 |
63 |
% |
2025 |
|
| |
|
YESTERDAY: |
Monday |
Reading |
Time |
CTO |
RecHi |
YY |
RecLo |
YY |
|
Maximum Barometric Pressure: |
1016.0 |
mb |
01:00 |
1015.4 |
mb |
1023.0 |
mb |
2017 |
|
|
|
|
Minimum: |
1009.0 |
mb |
18:00 |
1008.0 |
mb |
|
|
|
0.0 |
mb |
n/a |
|
| Mean: |
1012.5 |
mb |
|
1011.7 |
mb |
1022.0 |
mb |
2017 |
1008.5 |
mb |
2019 |
|
| |
Maximum Relative Humidity: |
99 |
% |
21:39 |
97 |
% |
100 |
% |
2017 |
|
|
|
|
Minimum: |
56 |
% |
13:00 |
55 |
% |
|
|
|
0 |
% |
n/a |
|
| Mean: |
78 |
% |
|
76 |
% |
98 |
% |
2017 |
64 |
% |
2025 |
|
| |
|
TOMORROW: |
Wednesday |
|
RecHi |
YY |
RecLo |
YY |
|
Barometric Pressure: |
|
1020.0 |
mb |
2022 |
0.0 |
mb |
n/a |
|
| Daily Mean BP: |
|
1018.5 |
mb |
2022 |
1009.0 |
mb |
2019 |
|
| |
Relative Humidity: |
|
99 |
% |
2017 |
0 |
% |
n/a |
|
| Daily Mean BP: |
|
1018.5 |
% |
2022 |
1009.0 |
% |
2019 |
|
| |
|
THIS MONTH: |
Aug Means + Records |
Mean |
CTO |
RecHi |
YY |
RecLo |
YY |
|
| Monthly Mean BP: |
1013.8 |
mb |
1013.2 |
mb |
1018.8 |
mb |
2025 |
1012.7 |
mb |
2020 |
|
| |
| Monthly Mean RH: |
78 |
% |
72 |
% |
79 |
% |
2024 |
68 |
% |
2025 |
|
| |
|
Daily Extremes + Records |
Max |
DD |
Min |
DD |
RecHi |
YY-DD |
RecLo |
YY-DD |
|
Barometric Pressure: |
1020.0 |
mb |
05 |
1003.0 |
mb |
03 |
1032.0 |
mb |
2025-06 |
0.0 |
mb |
n/a-n/a |
|
| Daily Mean BP: |
1018.5 |
mb |
05 |
1008.0 |
mb |
03 |
1030.0 |
mb |
2025-06 |
999.5 |
mb |
2020-29 |
|
| |
Relative Humidity: |
100 |
% |
08 |
45 |
% |
04 |
100 |
% |
2017-01 |
0 |
% |
n/a-n/a |
|
| Daily Mean RH: |
92 |
% |
02 |
68 |
% |
04 |
100 |
% |
2017-04 |
56 |
% |
2025-01 |
|
| |
|
LAST MONTH: |
Jul Means + Records |
Mean |
CTO |
RecHi |
YY |
RecLo |
YY |
|
| Mean Barometric Pressure: |
1012.6 |
mb |
1012.1 |
mb |
80853145.5 |
mb |
2016 |
0.0 |
mb |
2015 |
|
| |
| Mean Relative Humidity: |
71 |
% |
65 |
% |
99 |
% |
2014 |
-1 |
% |
2016 |
|
| |
|
Daily Extremes + Records |
Max |
DD |
Min |
DD |
RecHi |
YY-DD |
RecLo |
YY-DD |
|
Barometric Pressure: |
1023.0 |
mb |
12 |
999.0 |
mb |
18 |
1027.0 |
mb |
2018-07 |
998.0 |
mb |
2020-12 |
|
| Daily Mean BP: |
1021.5 |
mb |
12 |
1003.0 |
mb |
28 |
1025.5 |
mb |
2018-07 |
1000.5 |
mb |
2022-21 |
|
| |
Relative Humidity: |
100 |
% |
01 |
27 |
% |
05 |
100 |
% |
2015-01 |
25 |
% |
2019-08 |
|
| Daily Mean RH: |
94 |
% |
28 |
50 |
% |
17 |
100 |
% |
2017-08 |
46 |
% |
2018-08 |
|
| |
|
NEXT MONTH: |
September Monthly Records |
|
RecHi |
YY |
RecLo |
YY |
|
| Mean Barometric Pressure: |
|
1021.5 |
mb |
2018 |
1013.8 |
mb |
2021 |
|
| |
| Mean Relative Humidity: |
|
78 |
% |
2022 |
69 |
% |
2025 |
|
| |
|
September Daily Records |
|
RecHi |
YY-DD |
RecLo |
YY-DD |
|
Barometric Pressure: |
|
1038.0 |
mb |
2020-21 |
0.0 |
mb |
n/a-n/a |
|
| Daily Mean BP: |
|
1033.5 |
mb |
2020-20 |
1000.0 |
mb |
2017-05 |
|
| |
Relative Humidity: |
|
100 |
% |
2017-04 |
0 |
% |
n/a-n/a |
|
| Daily Mean RH: |
|
100 |
% |
2017-18 |
48 |
% |
2017-17 |
|
| |
|
THIS YEAR: |
2026 Means + Records |
Mean |
CTO |
RecHi |
YY |
RecLo |
YY |
|
| Annual Mean BP: |
1014.4 |
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: |
74 |
% |
Jan |
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 |
|
| |
|
