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   STATISTICS from CTO Weather Centre - June, 2025
   MONTHLY SUMMARY: MEANS AND TOTALS:

   Reading

Mean   

Normal   

RecHi   

YY

RecLo   

YY

   High Temp

 2018 2002

   Low Temp

 2018 2004

   Mean Temp

 2018 2002

   Dew Point

 2018 2015

   Relative Humidity

 61 % 59 % 71 % 2024 56 % 2016

   Barometric Pressure

 2020 2018

   Winds

 2021 2002

   - from

 SSW   E   W     N    
 
   Monthly Total

Total   

Normal   

RecMost   

YY

RecLeast   

YY
   Rain 2018 2014
   Snow 2015 2015
   - Water Equivalent 2015 2015
   Precipitation 2018 2013

   Sunshine

 189  h 78  h 280  h 2018 0  h 2002
 

   MONTHLY SUMMARY: SINGLE-DAY EXTREMES AND RECORDS:

   Reading

Max   

DD

Min   

DD

RecHi   

YY-DD

RecLo   

YY-DD

   High Temp

 23 01 2020-18 2002-16

   Low Temp

 24 01 2018-13 2020-13

   Humidex

   23         2018-13      

   Wind Chill

         n/a         2017-20

   Dew Point

 23 02 2018-13 2019-16

   Relative Humidity

 99 % 10 24 % 08 100 % 2021-13 0 % 2019-16

   Barometric Pressure

 13 01 2020-15 2018-29

   Winds

 04       2016-06      

   - from

 SW           SW          
 

   Daily Total

Most   

DD

RecMost   

YY-DD
   Rain 04 2018-04
   Snow 01 2002-01
   - Water Equivalent 01 2002-01
   Precipitation 04 2018-04

   Sunshine

 13:40   15 17:15   2020-14
 

   Daily Mean

Max   

DD

Min   

DD

RecHi   

YY-DD

RecLo   

YY-DD

   Temperature

 24 01 2018-13 2006-10

   Dew Point

 23 02 2018-13 2015-29

   Relative Humidity

 76 % 09 40 % 08 94 % 2013-07 28 % 2019-08

   Barometric Pressure

 13 19 2020-14 2018-29

   Winds

 10 06 2022-18 2002-01

   - from

 W     E     E   N    
 

   EVENTS LAST MONTH (18):

  
   
CTO Established - June 30 @ 01:00
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.
   
Lytton: Gone to Hell - June 30 @ 01:00
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.
   
Lytton: Hotter than Hell - June 29 @ 01:00
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 - June 26 @ 01:00
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.
   
Summer Solstice - June 20 @ 02:42
Spring ends; Summer begins (N. Hemisphere). Autumn ends; Winter begins (S. Hemisphere). Longest day of the year (N. Hemisphere). Shortest Day of the year (S. Hemisphere)
   
New Moon - June 24 @ 22:31
The Moon is nearest the Sun in the sky and cannot be seen from the ground.
   
Operation Barbarossa - June 22 @ 01:00
On this day in 1941 (84 years ago), Nazi Germany began its invasion of the Soviet Union. Despite initial gains, the invasion eventually bogged down and ultimately was repulsed by the Soviets, who captured Berlin in 1945.
   
Shelling of Estevan Lighthouse - June 20 @ 01:00
On this day in 1942, 83 years ago, Japanese submarine I-26 shelled the lighthouse at Estevan Point, on Vancouver Island. It was the only instance of the bombardment of Canada during the war.
   
Last Quarter - June 18 @ 07:19
A waning half-Moon is near the meridian (halfway across the sky) as the Sun rises.
   
Eruption of Mt. Pinatubo - June 15 @ 01:00
This Philippine volcano exploded on this date in 1991. The eruption forced ash high into the atmosphere, causing enhanced sunsets and a brief period of global cooling.
   
End of Falklands War - June 14 @ 01:00
On this day in 1982, the Falklands War ended with the surrender of Argentinian forces on the Islands.
   
Yukon Joins Confederation - June 13 @ 01:00
Today marks 127 years since Yukon joined the Canadian Confederation in 1898.
   
Full Moon - June 10 @ 19:43
The Moon is most-opposite the Sun in the sky, rising as the sun sets.
   
Valentina Tereshkova Orbits the Earth - June 6 @ 01:00
On this day in 1963--62 years ago--Soviet Cosmonaut Valentina Tereshkova became the first woman into space, and in orbit, aboard Vostok 6. No other woman flew into space until 1982.
   
D-Day - June 6 @ 01:00
On this date in 1944, Allied troops landed on the beaches of Normandy, in Operation Overlord; the "D-Day" landings. American, British and Canadian troops landed on five beaches, establishing a foothold on the continent and fighting their way inland. Canadian troops reached the furthest inland on that day. Artificial harbours were soon constructed, and fuel pipelines laid on the sea bottom from England to France. Hundreds of thousands of soldiers arrived in Europe in this way. The attack was the beginning of the end for Germany, with the Russians closing in from the east, and now the Allies growing in strength, liberating France and moving up the Italian Peninsula.
   
CN Created - June 6 @ 01:00
Today marks 106 years since the creation of the Canadian National Railway, today known simply as CN, in 1919. It is Canada's largest railway, including significant trackage in the United States.
   
First Quarter - June 2 @ 15:40
A waxing half-Moon is near the meridian (halfway across the sky) as the Sun sets.
   
Death of Stan Rogers - June 2 @ 01:00
On this day in 1983, Canadian folk-music star Stan Rogers lost his life aboard Air Canada Flight 797, in an aircraft fire. He was 33.
  


Daily Temperatures Last Month:
 


Precipitation Last Month:
 

 

Daily Readings, Last Month:
 
   Day    High    Low    Mean    MxHx    MnWC    AvRH    AvDP    AvBP    Precip    Sunrise    Sunset    Sun    Moon    Winds
   1                        74%                05:18    20:44    01:10    Waxing Crescent    W @    
   2                        57%                05:17    20:45    11:45    First Quarter    W @    
   3                        56%                05:17    20:46    01:30    Waxing Gibbous    W @    
   4                        57%                05:16    20:47    08:30    Waxing Gibbous    E @    
   5                        74%                05:16    20:47    00:55    Waxing Gibbous    W @    
   6                        56%                05:15    20:48    00:35    Waxing Gibbous    E @    
   7                        48%                05:15    20:49    06:05    Waxing Gibbous    E @    
   8                        40%                05:15    20:49    08:50    Waxing Gibbous    E @    
   9                        76%                05:15    20:50    00:50    Full    W @    
   10                        68%                05:14    20:51    05:40    Waning Gibbous    W @    
   11                        61%                05:14    20:51    08:30    Waning Gibbous    W @    
   12                        64%                05:14    20:52    08:25    Waning Gibbous    W @    
   13                        58%                05:14    20:52    05:40    Waning Gibbous    W @    
   14                        48%                05:14    20:53    12:35    Waning Gibbous    W @    
   15                        44%                05:14    20:53    13:40    Waning Gibbous    E @    
   16                        54%                05:14    20:54    07:35    Waning Gibbous    W @    
   17                        66%                05:14    20:54    03:30    Last Quarter    E @    
   18                        68%                05:14    20:54    03:40    Waning Crescent    E @    
   19                        74%                05:14    20:55    01:05    Waning Crescent    E @    
   20                        63%                05:14    20:55    08:20    Waning Crescent    W @    
   21                        63%                05:15    20:55    07:35    Waning Crescent    W @    
   22                        72%                05:15    20:55    05:35    Waning Crescent    W @    
   23                        60%                05:15    20:55    11:30    Waning Crescent    WNW @    
   24                        56%                05:15    20:55    11:00    New    E @    
   25                        50%                05:16    20:55    11:20    New    E @    
   26                        48%                05:16    20:55    02:50    Waxing Crescent    E @    
   27                        64%                05:17    20:55    03:00    Waxing Crescent    W @    
   28                        73%                05:17    20:55    04:35    Waxing Crescent    W @    
   29                        65%                05:17    20:55    01:15    Waxing Crescent    W @    
   30                        60%                05:18    20:55    12:50    Waxing Crescent    W @    
   June                    61%                    189h      SSW @    
   Normals                    59%    10.4°C    1013.1 mb            78 h      E @ 1 km/h   
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