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) - Monday, September 8, 2025 at 17:00 EDT
TODAY: |
Monday |
Reading |
Time |
CTO |
RecHi |
YY |
RecLo |
YY |
|
Current Barometric Pressure: |
1025.0 |
mb |
|
1024.6 |
mb |
|
|
|
|
|
|
|
Maximum Today: |
1026.0 |
mb |
11:00 |
1024.9 |
mb |
1026.0 |
mb |
2018 |
|
|
|
|
Minimum: |
1021.0 |
mb |
01:00 |
1019.8 |
mb |
|
|
|
0.0 |
mb |
n/a |
|
| Mean: |
1023.5 |
mb |
|
1022.4 |
mb |
1024.0 |
mb |
2018 |
1005.0 |
mb |
2021 |
|
| |
Current Relative Humidity: |
47 |
% |
|
46 |
% |
|
|
|
|
|
|
|
Maximum Today: |
96 |
% |
07:00 |
85 |
% |
100 |
% |
2022 |
|
|
|
|
Minimum: |
45 |
% |
15:00 |
41 |
% |
|
|
|
0 |
% |
n/a |
|
| Mean: |
70 |
% |
|
63 |
% |
94 |
% |
2017 |
62 |
% |
2018 |
|
| |
|
YESTERDAY: |
Sunday |
Reading |
Time |
CTO |
RecHi |
YY |
RecLo |
YY |
|
Maximum Barometric Pressure: |
1021.0 |
mb |
00:00 |
1019.8 |
mb |
1024.0 |
mb |
2018 |
|
|
|
|
Minimum: |
1014.0 |
mb |
03:00 |
1013.4 |
mb |
|
|
|
0.0 |
mb |
n/a |
|
| Mean: |
1017.5 |
mb |
|
1016.6 |
mb |
1022.0 |
mb |
2018 |
1008.5 |
mb |
2024 |
|
| |
Maximum Relative Humidity: |
96 |
% |
07:00 |
80 |
% |
100 |
% |
2017 |
|
|
|
|
Minimum: |
41 |
% |
16:00 |
37 |
% |
|
|
|
0 |
% |
n/a |
|
| Mean: |
68 |
% |
|
58 |
% |
98 |
% |
2017 |
68 |
% |
2025 |
|
| |
|
TOMORROW: |
Tuesday |
|
RecHi |
YY |
RecLo |
YY |
|
Barometric Pressure: |
|
1028.0 |
mb |
2017 |
0.0 |
mb |
n/a |
|
| Daily Mean BP: |
|
1027.0 |
mb |
2018 |
1007.0 |
mb |
2021 |
|
| |
Relative Humidity: |
|
100 |
% |
2022 |
0 |
% |
n/a |
|
| Daily Mean BP: |
|
1027.0 |
% |
2018 |
1007.0 |
% |
2021 |
|
| |
|
THIS MONTH: |
Sep Means + Records |
Mean |
CTO |
RecHi |
YY |
RecLo |
YY |
|
| Monthly Mean BP: |
1014.1 |
mb |
1013.5 |
mb |
1021.5 |
mb |
2018 |
1013.8 |
mb |
2021 |
|
| |
| Monthly Mean RH: |
68 |
% |
60 |
% |
78 |
% |
2022 |
74 |
% |
2017 |
|
| |
|
Daily Extremes + Records |
Max |
DD |
Min |
DD |
RecHi |
YY-DD |
RecLo |
YY-DD |
|
Barometric Pressure: |
1027.0 |
mb |
01 |
1002.0 |
mb |
04 |
1038.0 |
mb |
2020-21 |
0.0 |
mb |
n/a-n/a |
|
| Daily Mean BP: |
1025.0 |
mb |
01 |
1005.5 |
mb |
04 |
1033.5 |
mb |
2020-20 |
1000.0 |
mb |
2017-05 |
|
| |
Relative Humidity: |
100 |
% |
01 |
34 |
% |
03 |
100 |
% |
2017-04 |
0 |
% |
n/a-n/a |
|
| Daily Mean RH: |
73 |
% |
04 |
60 |
% |
03 |
100 |
% |
2017-18 |
48 |
% |
2017-17 |
|
| |
|
LAST MONTH: |
Aug Means + Records |
Mean |
CTO |
RecHi |
YY |
RecLo |
YY |
|
| Mean Barometric Pressure: |
1018.8 |
mb |
1018.0 |
mb |
1018.8 |
mb |
2025 |
1012.7 |
mb |
2020 |
|
| |
| Mean Relative Humidity: |
68 |
% |
59 |
% |
79 |
% |
2024 |
68 |
% |
2025 |
|
| |
|
Daily Extremes + Records |
Max |
DD |
Min |
DD |
RecHi |
YY-DD |
RecLo |
YY-DD |
|
Barometric Pressure: |
1032.0 |
mb |
06 |
1006.0 |
mb |
25 |
1032.0 |
mb |
2025-06 |
0.0 |
mb |
n/a-n/a |
|
| Daily Mean BP: |
1030.0 |
mb |
06 |
1008.0 |
mb |
24 |
1030.0 |
mb |
2025-06 |
999.5 |
mb |
2020-29 |
|
| |
Relative Humidity: |
100 |
% |
03 |
31 |
% |
01 |
100 |
% |
2017-01 |
0 |
% |
n/a-n/a |
|
| Daily Mean RH: |
86 |
% |
28 |
56 |
% |
01 |
100 |
% |
2017-04 |
56 |
% |
2025-01 |
|
| |
|
NEXT MONTH: |
October Monthly Records |
|
RecHi |
YY |
RecLo |
YY |
|
| Mean Barometric Pressure: |
|
1018.1 |
mb |
2024 |
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: |
2025 Means + Records |
Mean |
CTO |
RecHi |
YY |
RecLo |
YY |
|
| Annual Mean BP: |
1016.0 |
mb |
1014.1 |
mb |
13545939.2 |
mb |
2013 |
-121942637.6 |
mb |
2013 |
|
| |
| Annual Mean RH: |
71 |
% |
65 |
% |
134532195 |
% |
2013 |
-1225007104 |
% |
2056 |
|
| |
|
Monthly Extremes + Records |
Max |
MM |
Min |
MM |
RecHi |
YY-MM |
RecLo |
YY-MM |
|
| Monthly Mean BP: |
1018.8 |
mb |
Aug |
1010.6 |
mb |
Mar |
170199997.2 |
mb |
2016-Sep |
-108179039.6 |
mb |
2015-Jan |
|
| |
| Monthly Mean RH: |
74 |
% |
Jan |
66 |
% |
Apr |
1881171822 |
% |
2016-Sep |
-1225804048 |
% |
2015-Feb |
|
| |
|
Daily Extremes + Records |
Max |
MM-DD |
Min |
MM-DD |
RecHi |
Date |
RecLo |
Date |
|
Barometric Pressure: |
1037.0 |
mb |
Feb-01 |
986.0 |
mb |
Mar-06 |
13554508.8 |
mb |
2014-01-31 |
-122673840.8 |
mb |
2014-01-31 |
|
| Daily Mean BP: |
1031.0 |
mb |
Feb-01 |
992.5 |
mb |
Mar-06 |
13554518.4 |
mb |
2014-01-31 |
0.0 |
mb |
2014-01-31 |
|
| |
Relative Humidity: |
100 |
% |
Jan-01 |
18 |
% |
Apr-17 |
100 |
% |
2015-03-15 |
-1224780080 |
% |
2014-01-31 |
|
| Daily Mean RH: |
100 |
% |
Jul-07 |
40 |
% |
May-11 |
100 |
% |
2015-12-02 |
-1081677968 |
% |
2056-01-31 |
|
| |
|
LAST YEAR: |
2024 Means |
Mean |
CTO |
|
| Annual Mean BP: |
1017.6 |
mb |
1015.4 |
mb |
|
| |
| Annual Mean RH: |
77 |
% |
68 |
% |
|
|
Monthly Extremes |
Max |
MM |
Min |
MM |
|
| Monthly Mean BP: |
1019.9 |
mb |
Dec |
1014.9 |
mb |
Nov |
|
| |
| Monthly Mean RH: |
84 |
% |
Dec |
72 |
% |
Oct |
|
|
Daily Extremes |
Max |
MM-DD |
Min |
MM-DD |
|
Barometric Pressure: |
1050.0 |
mb |
Dec-14 |
994.0 |
mb |
Dec-05 |
|
| Daily Mean BP: |
1047.0 |
mb |
Dec-14 |
994.0 |
mb |
Dec-30 |
|
| |
Relative Humidity: |
100 |
% |
Oct-07 |
19 |
% |
Oct-28 |
|
| Daily Mean RH: |
100 |
% |
Dec-10 |
42 |
% |
Oct-28 |
|
| |
|
