Ottawa Macdonald-Cartier Int'l Airport, Ontario

Latitude 45.32° N | Longitude 75.67° W

Past 24 Hour Conditions

Imperial units
Graphic

Date / Time (EDT)	Conditions	Temperature (°C)	Temperature (°F)	Wind (km/h)	Wind (mph)	Humidex	Humidex	Relative humidity (%)	Dew point (°C)	Dew point (°F)	Pressure (kPa)	Pressure (inches)	Visibility (km)	Visibility (mi)
05 September 2026
03:00	Mainly Clear	15 (15.0)	59 (59.0)	NW 9	NW 6	*	*	96	14	58	101.2	29.9	24	15
02:00	Mainly Clear	16 (16.1)	61 (61.0)	WNW 10	WNW 6	*	*	96	15	60	101.2	29.9	24	15
01:00	Mainly Clear	16 (16.3)	61 (61.3)	NW 11	NW 7	*	*	90	15	58	101.3	29.9	24	15
00:00	Partly Cloudy	18 (17.7)	64 (63.9)	WNW 12	WNW 7	*	*	87	16	60	101.2	29.9	24	15
04 September 2026
23:00	Mostly Cloudy	18 (17.7)	64 (63.9)	NW 12	NW 7	*	*	88	16	60	101.3	29.9	24	15
22:00	Mostly Cloudy	19 (18.7)	66 (65.7)	WNW 15	WNW 9	*	*	83	16	60	101.3	29.9	24	15
21:00	Mostly Cloudy	19 (18.5)	65 (65.3)	WNW 10	WNW 6	*	*	82	15	60	101.3	29.9	24	15
20:00	Mostly Cloudy	20 (19.5)	67 (67.1)	NW 18	NW 11	*	*	71	14	57	101.2	29.9	24	15
19:00	Mostly Cloudy	20 (19.8)	68 (67.6)	NW 17	NW 11	*	*	70	14	58	101.2	29.9	24	15
18:00	Mostly Cloudy	21 (21.1)	70 (70.0)	WNW 17	WNW 11	25	77	71	16	60	101.2	29.9	24	15
17:00	Mostly Cloudy	22 (21.5)	71 (70.7)	NW 26	NW 16	25	77	65	15	58	101.2	29.9	24	15
16:00	Mostly Cloudy	22 (22.0)	72 (71.6)	WNW 24	WNW 15	26	79	63	15	59	101.2	29.9	24	15
15:00	Mostly Cloudy	22 (22.1)	72 (71.8)	NW 24	NW 15	26	79	63	15	59	101.3	29.9	24	15
14:00	Mostly Cloudy	23 (23.1)	74 (73.6)	W 18	W 11	28	82	63	16	60	101.3	29.9	24	15
13:00	Mostly Cloudy	22 (22.0)	72 (71.6)	WNW 22	WNW 14	26	79	68	16	60	101.3	29.9	24	15
12:00	Partly Cloudy	21 (21.2)	70 (70.2)	W 16	W 10	26	79	73	16	61	101.3	29.9	24	15
11:00	Partly Cloudy	21 (20.7)	69 (69.3)	WNW 12	WNW 7	26	79	78	17	62	101.3	29.9	24	15
10:00	Partly Cloudy	19 (19.2)	67 (66.6)	WNW 15	WNW 9	*	*	82	16	61	101.3	29.9	24	15
09:00	Partly Cloudy	18 (17.5)	64 (63.5)	W 15	W 9	*	*	92	16	61	101.3	29.9	24	15
08:00	Mostly Cloudy	17 (16.9)	62 (62.4)	W 10	W 6	*	*	96	16	61	101.3	29.9	24	15
07:00	Partly Cloudy	16 (16.0)	61 (60.8)	W 13	W 8	*	*	99	16	60	101.2	29.9	24	15
06:00	Mostly Cloudy	16 (16.2)	61 (61.2)	WNW 10	WNW 6	*	*	99	16	61	101.2	29.9	24	15
05:00	Mainly Clear	15 (15.2)	59 (59.4)	W 8	W 5	*	*	99	15	59	101.2	29.9	24	15
04:00	Mainly Clear	16 (15.9)	61 (60.6)	W 7	W 4	*	*	98	16	60	101.2	29.9	24	15
03:00	Clear	16 (15.7)	60 (60.3)	W 10	W 6	*	*	98	15	60	101.2	29.9	24	15

Legend

n/a: not available

*: value not significant

This table displays weather elements available for this station

Highest temperature

Lowest temperature

Equal temperature values are all highlighted

This is an automated product, generated using preliminary data.

If you require additional historical weather information, please visit Climate website.

Highlighting criteria

Significant Weather Conditions

To highlight potentially dangerous weather conditions the following are displayed in bold characters:

Tornado
Funnel Cloud
Thunderstorm
Lightning
Hail
Freezing precipitation
Heavy precipitation
Any other weather condition, if the visibility is 1.0 km0.6 miles or less

In addition some weather elements are displayed in bold characters when they reach the following values:

Temperatures:

Hot: 30.0°C86°F and higher
Cold: -30.0°C-22°F and lower

Humidex:

Values of 3595 and more

Wind chill

Values of -35-31 and below

Winds:

Mean speed of 60 km/h37 mph or more
Gust speed of 90 km/h56 mph or more

Visibility:

1.0 km0.6 miles or less along with the weather conditions

How to use

Add to shortcuts
- Go to the desired page on the site, open the Weather shortcuts menu and click on the "Add to shortcuts" button
- Page name will display in the "Add this page" window, the name can be changed by highlighting the text and entering the desired name
- Click on the "Save" button to add the link to the list
- Click on the "X" button to close the panel
Delete a link
- Click on the "Organize shortcuts" button
- Select the link to delete
- Click on the "Delete" button to remove the link from the list
- Click on the "Close" button to save the change
Move a link up/down the list
- Click on the "Organize shortcuts" button
- Click and hold the link and move to new location in the list
- Click on the "Close" button to save the change
Rename a link
- Click on the "Organize shortcuts" button
- Select the link to rename
- Click on the "Rename" button and change the link name
- Click the enter or tab key
- Click on the "Close" button to save the change
Keyboard navigation
- Use the Tab key to move to a button or link
- Use the Enter key to click on buttons or links
- Organize shortcuts navigation
  - Use the ↑ Up key to select the link above. If none are selected, it will select the first link.
  - Use the ↓ Down key to select the link below. If none are selected, it will select the last link.
  - Use the Page Up key to move a selection up in the list.
  - Use the Page Down key to move a selection down in the list.
Restore default list

Warning: Clicking on the button below will remove all your customized links.