STATISTICS from CTO Weather Centre -
May, 2025
MONTHLY SUMMARY: MEANS AND TOTALS:
Reading
Mean
Normal
RecHi
Year
RecLo
Year
High Temp
2022
2002
Low Temp
2024
2002
Mean Temp
2022
2002
Dew Point
2024
2017
Relative Humidity
56
%
68
%
2024
44
%
2023
Barometric Pressure
2023
2017
Winds
2023
2002
- from
W
WNW
N
Monthly Total
Total
Normal
RecMost
YY
RecLeast
YY
Rain
2022
2012
Snow
2015
2015
- Water Equivalent mm
2012
2012
Precipitation
2022
2012
Sunshine
91
h
372
h
2016
0
h
2002
MONTHLY SUMMARY: SINGLE-DAY EXTREMES AND RECORDS:
Reading
Max
DD
Min
DD
RecHi
YY-DD
RecLo
YY-DD
High Temperature
2020-27
2002-14
Low Temp
2020-27
2020-09
Humidex
2020-27
Wind Chill
2021-01
Dew Point
2015-05
2019-01
Relative Humidity
99
%
2013-23
1
%
2017-01
Barometric Pressure
2023-26
2023-01
Winds
2022-21
- from
W
Daily Total
Most
DD
RecMost
YY-DD
Rain
2023-01
Snow
2002-01
Snow Equiv mm
2002-01
Precipitation
2023-01
Sunshine
22:00
h
2020-20
Daily Mean
Max
DD
Min
DD
RecHi
YY-DD
RecLo
YY-DD
Temperature
2020-27
2002-14
Dew Point
2024-22
2017-01
Relative Humidity
87
%
2015-11
1
%
2017-01
Barometric Pressure
2023-26
2023-01
Winds
2023-01
2002-01
- from
NNW
N
EVENTS NEXT MONTH (11):
First Quarter - May 4 @ 00:51
A waxing half-Moon is near the meridian (halfway across the sky) as the Sun sets.
Holland Liberated - May 7 @ 01:00
On this day in 1945, Canada accepted the surrender of German forces in the Netherlands, after a months-long campaign to dislodge them. This effort sparked a close and enduring friendship between the two countries.
V-E Day - May 8 @ 01:00
Victory-in-Europe Day celebrates the 1945 surrender by Nazi Germany to the Allied Forces. This had followed a vicious battle for the city of Berlin, and came little more than a week after Adolph Hitler had taken his own life.
Manitoba and NWT Join Confederation - May 12 @ 01:00
Today marks 155 years since Manitoba and the North West Territories joined the Canadian Confederation in 1870.
Full Moon - May 12 @ 04:55
The Moon is most-opposite the Sun in the sky, rising as the sun sets.
Eruption of Mt. St. Helens - May 18 @ 01:00
On this day in 1980 (now 45 years ago), Mount Saint Helens, a beautiful, symmetrical stratovolcano cone often referred to as "the Fuji of the Northwest," erupted explosively after months of signs that it was waking up. The eruption was triggered by a huge landslide, and the mountain blew away its summit and the southern quadrant of its cone. In many areas, for the next couple of days, it was pitch-black from the clouds of volcanic dust. Huge lahars washed down many rivers, and the showpiece of the area, Spirit Lake, was drowned in boiling debris. The eruption was extensively covered by international media. Subsequent smaller eruptions carried ash up into Canada. The sound of the eruption was heard up to 320 kilometres away, including by the Author, as he delivered papers on southern Vancouver Island.
Last Quarter - May 19 @ 23:58
A waning half-Moon is near the meridian (halfway across the sky) as the Sun rises.
Candian Derecho of 2022 - May 21 @ 01:00
On this date, in 2022, a derecho hit southern Ontario and Quebec, with winds up to 190 km/h and a number of tornadoes. Damage was widespread, with many trees down and the power grid severely damaged. The Author experienced this storm, and classed it alongside Post-Tropical Storm Blanche, in 1975.
New Moon - May 26 @ 03:02
The Moon is nearest the Sun in the sky and cannot be seen from the ground.
Victoria Day - May 19 @ 00:00
Canada takes a holiday on this date, in celebration of the life and accomplishments of Her Majesty, Queen Victoria (1819-05-24 - 1901.01.22).
Barrie Tornado - May 31 @ 01:00
Today marks 40 years since a major tornado ripped through the city of Barrie, Ontario, in 1985, causing 8 deaths and $150-million in damage.
Next Month:
Day
MeanHigh
MeanLow
MeanTemp
AvRH
AvDP
AvBP
Prec
Sunrise
Sunset
Moon
Winds
1
59%
05:51
20:10
Waxing Crescent
E @
2
61%
05:49
20:11
Waxing Crescent
W @
3
59%
05:48
20:12
Waxing Crescent
W @
4
64%
05:47
20:14
First Quarter
W @
5
51%
05:45
20:15
Waxing Gibbous
W @
6
41%
05:44
20:16
Waxing Gibbous
WNW @
7
43%
05:42
20:17
Waxing Gibbous
E @
8
53%
05:41
20:18
Waxing Gibbous
W @
9
62%
05:40
20:20
Waxing Gibbous
E @
10
64%
05:38
20:21
Waxing Gibbous
WNW @
11
58%
05:37
20:22
Full
ENE @
12
51%
05:36
20:23
Waning Gibbous
W @
13
57%
05:35
20:25
Waning Gibbous
W @
14
55%
05:33
20:26
Waning Gibbous
ENE @
15
59%
05:32
20:27
Waning Gibbous
WNW @
16
63%
05:31
20:28
Waning Gibbous
WNW @
17
57%
05:30
20:29
Waning Gibbous
E @
18
51%
05:29
20:30
Waning Gibbous
W @
19
53%
05:28
20:31
Last Quarter
E @
20
50%
05:27
20:32
Waning Crescent
E @
21
51%
05:26
20:34
Waning Crescent
W @
22
62%
05:25
20:35
Waning Crescent
W @
23
59%
05:24
20:36
Waning Crescent
WNW @
24
53%
05:23
20:37
Waning Crescent
ENE @
25
58%
05:23
20:38
Waning Crescent
W @
26
52%
05:22
20:39
New
WNW @
27
55%
05:21
20:40
Waxing Crescent
WNW @
28
58%
05:20
20:41
Waxing Crescent
E @
29
65%
05:20
20:42
Waxing Crescent
ENE @
30
57%
05:19
20:43
Waxing Crescent
ENE @
31
54%
05:18
20:43
Waxing Crescent
W @
May
56%
6.7°C
1015.8 mb
W @ 1 km/h
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