Centretown Observatory:

Current Weather

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   Latest Observations from CTO Weather Centre - Monday, June 30, 2025 at 20:54 EDT
   Local Sky: Cloudy
   Airport: Mostly Cloudy

 

Centretown   

Airport   

   Temperature:

   Humidex:

   

   Wind Chill Index:

   

   Relative Humidity:

54

%

62 %

   Dew Point:

   Precipitation Today:

   

   Sunshine Today:

12:50

     
 

Centretown   

Airport   

   Barometric Pressure:

 

   - Trend:

Falling

  Falling    

   Winds:

S at

S at  

   - Bearing (approx.):

180 ° 180 °  

   - Recent Gust:

     km/h  

   Visibility:

     

   Capture Accuracy:

1719/1719 (100.00%)  

   Webcams and Radar:

CTO Webcam:

Parliament Hill Webcam:

EC Local Radar:

EC National Radar:

About... Parliament Hill Webcam

   Current Official Forecast:

[Source]

Forecasts issued Mon, June 30, 2025 at 15:30:

Tuesday Wednesday Thursday Friday Saturday Sunday
POP 70% POP 0% POP 30% POP 0% POP 0% POP 40%
Monday night Tuesday night Wednesday night Thursday night Friday night Saturday night  
 
 
 
POP 70% POP 30% POP 0% POP 30% POP 0% POP 0%  
Monday night: Increasing cloudiness. 30 percent chance of showers changing to 70 percent chance of showers late this evening. Risk of a thunderstorm this evening and overnight. Wind south 20 km/h becoming light this evening. Low 19. POP 70%.
Tuesday: Cloudy with 70 percent chance of showers early in the morning then 30 percent chance of showers in the morning then a mix of sun and cloud. Risk of a thunderstorm in the morning. High 27. Humidex 35. UV index 9 or very high. POP 70%.
Tuesday night: Partly cloudy with 30 percent chance of showers in the evening. Becoming clear late in the evening and overnight. Risk of a thunderstorm in the evening. Low 16. POP 30%.
Wednesday: A mix of sun and cloud. High 29.
Wednesday night: Cloudy periods. Low 17.
Thursday: A mix of sun and cloud with 30 percent chance of showers. High 26. POP 30%.
Thursday night: Cloudy periods with 30 percent chance of showers. Low 13. POP 30%.
Friday: Sunny. High 27.
Friday night: Clear. Low 16.
Saturday: A mix of sun and cloud. High 29.
Saturday night: Cloudy. Low 20.
Sunday: Cloudy with 40 percent chance of showers. High 28. POP 40%.
 

   Regional Watches and Warnings:

Current Satellite Imagery:

S. and E. Ontario:
Click for source page

Marine - Great Lakes:
Click for source page

Visible:
Click for EC website

Infrared:
Click for EC website

 
   Today: 15:37 of daylight    Yesterday: 15:38 of daylight
 

Centretown

Airport

   Sunrise:

    05:18     05:18

   Sunset:

    20:55     20:55
 

   Normal High:

   

   Normal Low:

   

   Record High:

(2014) (1963)

   Record Low:

(2004) (2022)
 
   

Centretown

 

Airport

   Sunrise:

    05:17     05:17

   Sunset:

    20:55     20:55
 

   High:

(15:39) (18:00)

   Low:

(06:19) (04:00)

   Precip:

   

   Sunshine:

01:15          
  

   Current and Upcoming Events (next 7 days: 11):

 
   
Lytton: Gone to Hell - Mon, June 30 @ 01:00 (+0d, 19h, 55m)
On this day in 2021, literally the day after setting an all-time Canadian high-temperature record, the town of Lytton was wiped out in a forest fire. In the midst of a "heat dome" event, during a parched summer, the forests of BC were tinder-dry.
   
CTO Established - Mon, June 30 @ 01:00 (+0d, 19h, 55m)
The Centretown Observatory was established on this day in 1990 (35 years ago). Back then, the surrounding trees were much shorter, and the radio bands much quieter. *sigh*. The first iteration of our online weather system was launched in 2009, and the current system first became operational 24/7 in early 2012.
   
Canada Day - Tue, July 1 @ 01:00 (-0d, 4h, 5m)
Happy birthday to Canada, now 158 years old!
   
PEI Joins Confederation - Tue, July 1 @ 01:00 (-0d, 4h, 5m)
Today marks 152 years since Prince Edward Island joined the Canadian Confederation in 1873.
   
Battle of the Somme - Tue, July 1 @ 01:00 (-0d, 4h, 5m)
From this day in 1916, to November 18, Canadians were engaged in the Battle of the Somme. The battle helped to cement their reputation as hardened, first-class troops who gave their all in the quest for victory.
   
Battle of Beaument-Hamel - Tue, July 1 @ 01:00 (-0d, 4h, 5m)
Canada day has a different meaning for Newfoundlanders, who observe the anniversary of this battle, which occurred during the opening of the Battle of the Somme, in 1916. The Newfoundland Regiment suffered heavy losses that day; but they, like their Canadian brothers, emerged from this baptism of fire with a hard-earned reputation as front-line troops. After the war, a stunning monument was erected at the site, featuring a bronze caribou on a large stone pedestal.
   
First Quarter - Wed, July 2 @ 07:30 (-1d, 10h, 35m)
A waxing half-Moon is near the meridian (halfway across the sky) as the Sun sets.
   
HMCS Bonvaventure decommissioned - Thu, July 3 @ 01:00 (-2d, 4h, 5m)
On this day in 1970, HMCS Bonaventure was decomissioned after 13 years' service. This vessel was Canada's third aircraft carrier, after Warrior and Magnificent. Some 215 metres long and 34 wide, she was a small (by modern standards) ship of her type, but she was able to maintain a constant aerial screen during operations. Originally laid down during WWII, as the British ship HMS Powerful, she was mothballed after the war; she was acquired by the Canadian government in 1952 and commissioned in January of 1957. The Author nostalgically remembers car rides past her, in the Halifax dockyard, in the late Nineteen-Sixties.
   
Aphelion - Thu, July 3 @ 07:54 (-2d, 10h, 59m)
Earth is farthest from the Sun in its slightly-elliptical orbit.
   
US Independence Day - Fri, July 4 @ 01:00 (-3d, 4h, 5m)
Not to be confused with the hokey mid-90's movie.
   
BC Forest Fires - Mon, July 7 @ 01:00 (-6d, 4h, 5m)
A months-long period of massive forest fires began on this day in 2017. A State of Emergency held for 70 days.
   - times in EST or EDT according to date of event
  

   Recent Events (Reverse Order; Last 7 days: 3):

 
   
Lytton: Hotter than Hell - Sun, June 29 @ 01:00 (+1d, 19h, 55m)
On this day in 2021, the all-time Candian high-temperature record--49.6° celsius--was recorded in the town of Lytton, British Columbia, in the midst of a "heat dome" event. Very literally the very next day, the town was razed in a forest fire.
   
St. Lawrence Seaway Opens - Thu, June 26 @ 01:00 (+4d, 19h, 55m)
On this day in 1959, the St. Lawrence Seaway, considered one of the engineering marvels of the Twentieth Century, was officially opened by Her Majesty, Queen Elizabeth II. The system consists of 13 locks and is jointly managed by Canada and the United States.
   
New Moon - Tue, June 24 @ 22:31 (+5d, 22h, 24m)
The Moon is nearest the Sun in the sky and cannot be seen from the ground.
   - times in EST or EDT according to date of event
  

   Current Terminator:

Tropical Weather Synopses:

Americas:
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Space Weather Dashboard:

Tropical Weather (NOAA):
Click for NHC website

Canadian Hurricane Centre:
Click for CHC website

Regional Temperatures (Cities Clickable):

National Temperatures (Cities Clickable):


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