XGY   Grimsby Mountain, ON
Weather Observed At   43-11  N    79-34  W
2024
Note all stats on this page use calendar days (0000-2359). MSC stats use "climate days" (normally 0800-0759).
2004-2020 NORMALS


 TEMPERATURE  (C) Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  RECORD HIGHEST : 17.8
19.7
27.0
30.6
37.2
36.1
41.1
40.6
38.3
32.0
25.8
21.0
41.1
  HIGHEST : 7.2
16.4
21.3
22.5
30.7
33.7
 
 
 
 
 
 
33.7
   Date : 1/9 2/28
3/5 4/9
5/216/19
     
      6/19
   Time : 2257  1110
12401819 1502
1359    
 
   
  1359
   Normal :
11.9
10.8
17.5
25.031.132.834.0
32.8
31.426.118.512.8
34.8
  AVERAGE HIGH : 1.1
5.5
8.7
13.3
21.9
25.3
 
 
 
 
 
 
 
   Normal  :
0.0
1.05.6
12.1
19.724.8
27.9
26.722.815.6
8.9
2.7
14.0
  AVERAGE :
-1.5
1.2
4.5
8.9 16.5
20.2
 
 
 
 
 
 
 
   Departure from Normal  :
+2.3
+4.5
+3.2
+1.7
+2.5
+0.7
           
 
   Normal  :
-3.8
-3.3
1.37.2
14.0
19.5
22.6
21.6
18.0
11.3
4.9
-0.5
9.4
  AVERAGE LOW : -4.0
-3.1
0.3
4.5
11.0
15.1
 
 
 
 
 
 
 
   Normal  :
-7.6
-7.5
-3.0
2.38.4
14.2
17.4
16.6
13.2
7.0
0.9
-3.7
4.9
  LOWEST : -15.8
-10.2
-8.0
0.2
6.9
9.7
 
 
 
 
 
 
-15.8
   Date : 1/20
2/243/22
4/255/31
6/1
 
 
 
 
  
1/20
   Time : 0620 0721 0433
0604
0426 0519            0620
   Normal :
-18.4 -17.4-12.1 -3.9 1.47.812.011.26.0-0.7-7.0 -12.2-20.5
  RECORD LOWEST : -27.8 -29.4
-22.8
-17.2
-4.4
1.7
5.6
1.1
-0.6
-9.4
-15.6
-28.9
-29.4
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR

 REL. HUMIDITY  (%) Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  HIGHEST : 100
98
98
98
99
97
 
 
 
 
 
 
100
   Date : 1/25+
2/233/4+
4/11+
5/19+6/3+
 
 
 
 
 
 
1/25+
   Time : 2123
0829
0824
2222
0300
0440
 
 
 
 
 
 
2123
  AVERAGE :
83
70
71
71
71
73
 
 
 
 
 
 
 
   Departure from Normal  :
+8 -3 +2 +4 +3 +3        
     
   Normal  :
75
73
69
67
68
70
70
72
74
76
75
78
72
  LOWEST : 50
34
24
27
26
18
 
 
 
 
 
 
18
   Date : 1/17
2/26
3/13
4/22
5/31
6/1
 
 
 
 
 
 
6/1
   Time : 1426
1606
1724
1347
1452
1657
 
 
 
 
 
 
1657
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR

 DEW POINT  (C) Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  HIGHEST : 6.9
12.9
11.1
17.3
20.4
25.1
 
 
 
 
 
 
25.1
   Date : 1/9
2/28
3/5
4/28
5/22
6/19
 
 
 
 
 
 
6/19
   Time : 2256
1109
1239
1556
1250
1359
 
  
 
 
 
1359
  AVERAGE :-4.4
-4.1
-0.9
3.2
10.6
14.7
 
 
 
 
 
 
 
   Departure from Normal  :
+2.9
+3.3
+3.2
+2.3
+2.9
+1.2
 
 
 
 
 
 
 
   Normal : -7.3
-7.4
-4.1
0.9
7.7
13.5
16.5
16.2
13.3
7.2
1.0
-3.7
4.5
  LOWEST : -19.0
-16.7
-12.1
-7.7
-0.7
-0.9
 
 
 
 
 
 
-19.0
   Date : 1/17
2/24
3/214/25
5/30
6/1
 
 
 
 
 
 
1/17
   Time : 0415
1625
2109
1733
1834
1657
 
 
 
 
 
 
0415
  Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
 
 PRECIPITATION (mm) Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  RECORD HIGH TOTAL : 147.7
131.1
146.0
180.1
193.8
189.6
186.1
202.7
224.3
231.9
239.4
133.6
1164.6
  TOTAL :138.7
32.6
57.0
107.9
67.2
70.9
 
 
 
 
 
 
 
   % of Normal  :
191%  47% 74% 107% 83% 85%  
 
    
 
 
 
   Normal :
72.6
69.8
77.1
100.980.983.2
79.377.2
76.6101.8
75.4
85.3
980.1
  RECORD LOW TOTAL : 9.5
17.2
18.7
15.7
12.7
14.4
13.9
11.4
7.1
9.9
10.7
19.9
540.4
  RAIN / SNOW RATIO (%) :75/25
77/23
85/15 99/1
-
-
-
-
-
 
 
 
 
   Normal :
59/41
43/57
66/34
92/8100/0-
--
-100/0
88/12
64/36
85/15
  EVAPOTRANSPIRATION :-11.6
-32.4
-53.3
-67.7
-118.3
-112.3
 
 
 
 
 
 
 
  NET MOISTURE : +127.1
+0.2
+3.7
+40.2
-51.1 -41.4
 
 
 
 
 
 
 
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
   
 RAINFALL (mm) Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  RECORD HIGH TOTAL : 130.9
100.0
144.2
175.5
193.8
189.6
186.1
202.7
224.3
231.9
230.0
127.4
1027.2
  TOTAL :104.2
25.2
48.5
107.1
67.2
70.9
 
 
 
 
 
 
 
   Normal :
43.0
29.7
51.1
92.680.983.2
79.377.2
76.6101.4
66.254.3
835.5
  RECORD LOW TOTAL : 0
0
4.3
14.5
12.7
14.4
13.9
11.4
7.1
9.9
10.7
0
447.5
  RECORD IN 1 DAY : 52.1
40.6
51.6
52.0
68.6
78.0
72.6
90.2
77.0
115.3
60.2
57.4
115.3
  MOST IN 1 DAY : 36.3
12.6
16.2
28.1
15.7
14.0  
 
 
 
 
 
36.3
   Date : 1/26
2/27
3/14
4/11
5/276/29
 
 
 
 
 
 
1/26
  HEAVIEST RAIN RATE : (mm/h) 26.4
180.0
30.0
164.6
153.6
230.4
 
 
 
 
 
 
230.4
   Date : 1/26
2/283/14 4/28
5/25
6/23
 
 
 
 
 
 
6/23
   Time : 0508
0320
2124
0955
0837
1537
 
 
 
 
 
 
1537
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
 
 SNOWFALL (cm) Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  RECORD HIGH TOTAL : 98.6
110.4
74.8
40.0
2.5
0
0
0
0
18.0
42.0
107.3
246.4
  TOTAL :28.6
10.6
10.0
0.4
-
-
-
-
-
 
 
 
 
   % of Normal  :
83% 27% 45%6%
         
 
 
 
   Normal :
34.6
38.7
22.0
6.2
TR
0
0
0
0
0.1
8.1
30.1
139.8
  RECORD LOW TOTAL : 3.0
0.4
0
0
0
0
0
0
0
0
0
3.8
54.7
  RECORD IN 1 DAY : 50.8
40.6
38.1
27.8
2.5
-
-
-
-
11.4
22.9
61.0
61.0
  MOST IN 1 DAY : 8.2
4.0
4.2
0.4
-
-
-
-
-
 
 
 
8.2
   Date : 1/23
2/15
3/22
4/4
 
-
-
-
-
 
 
 
1/23
  WATER EQUIVALENT RATIO : 8.314.3
11.8
5.0
-
-
-
-
-
 
 
 
 
   Normal :
11.7
9.6
8.5
7.6
1.7-
-
-
-
1.5
8.8
9.7
10.0
  HIGHEST SNOW ON GROUND : 12
5
7
TR
-
-
-
-
-
 
 
 
12
   Date : 1/23
2/18
3/23
4/4+

-
-
-
-
 
 
 
1/23
   Normal : 19272240-
- - -
0
51531
  AVERAGE SNOW ON GROUND : 2
1
TR
0
-
-
-
-
-
 
 
 
 
   Normal :
8148TR
0-
- - -
0
143
  SNOW ON GND. AT END OF MONTH : 0
3
0
0
-
-
-
-
-
 
 
 
-
   Normal :
121520
0-
- - -
0
16-
  Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
 
 WIND (kt / )
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  HIGHEST VELOCITY / SPEED :
35
31
29
28
26
23
 
 
 
 
 
 
35
                                   / DIRECTION : 170
260
260
160
250
230
 
 
 
 
 
 
170
  Date : 1/13
2/28
3/20
4/23
5/8
6/23
 
 
 
 
 
 
1/13
  Time : 1313
1746
1647
1437
1306
1657
 
 
 
 
 
 
1313
  AVERAGE DAILY PEAK GUST :
17.2
16.8
16.7
17.7
12.4
12.1
 
 
 
 
 
 
 
  PEAK WIND DIRECTION : (days)













   NORTH :
9
8
12
9
13
11
 
 
 
 
 
 
64
   NORTHEAST :
2
1
2
6
3
-
 
 
 
 
 
 
14
   EAST :
-
1
-
-
-
1
 
 
 
 
 
 
2
   SOUTHEAST :
1
1
1
2
-
-
 
 
 
 
 
 
5
   SOUTH :
8
6
9
5
7
5
 
 
 
 
 
 
40
   SOUTHWEST :
7
4
1
2
2
6
 
 
 
 
 
 
22
   WEST :
3
7
6
5
6
6
 
 
 
 
 
 
33
   NORTHWEST :
1
1
-
1
-
1
 
 
 
 
 
 
4
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  
 PRESSURE (in.)Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  HIGHEST S.L.P.  :
30.55
30.44
30.44
30.43
30.35
30.35
 
 
 
 
 
 
30.55
   Date :
1/21
2/293/1
4/25
5/31
6/20
 
 
 
 
 
 
1/21
   Time :
1021
1836
0808
1053
0924
0337
 
 
 
 
 
 
1021
   Normal :
30.67 30.56 30.55 30.47 30.3730.2330.2430.25 30.41 30.46 30.56 30.62 30.75
  AVERAGE S.L.P. :
30.00
29.96
29.97
29.90
29.89
29.94
 
 
 
 
 
 
 
   Departure from Normal  :
-0.02
-0.06
-0.08 -0.05 -0.07 -0.03  
 
 
     
 
   Normal :
30.02
30.02
30.05
29.95
29.96
29.91
29.92
29.95
30.04
30.00
30.05
30.03
29.99
  LOWEST S.L.P. :
28.87
29.18
29.49
29.02
29.50
29.51
 
 
 
 
 
 
28.87
   Date :
1/9+
2/28
3/16+
4/12
5/27
6/6
 
 
 
 
 
 
1/9+
   Time :
2335
1108
2316
0553
1549
1522
 
 
 
 
 
 
2335
   Normal :
29.27 29.3129.37 29.2829.5129.51 29.59 29.6029.50 29.37 29.30 29.3129.11
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  
 DAYS WITH :
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  THUNDERSTORM :
-
2
-
2
4
10
 
 
 
 
 
 
18
   Normal :
001246763
2
00 31
  RAIN :
10
4
13
21
16
16
 
 
 
 
 
 
80
   Normal :
7510141615141312
18129146
  DRIZZLE :
8
2
3
2
3
1
 
 
 
 
 
 
19
   Normal :
213221002
33423
  HAIL :
-
1
-
--
-
 
 
 
 
 
 
1
   Normal :
- - - 00000-
0- - 1
  FREEZING RAIN : -
-
-
-
-
-
-
-
-
-
 
 
0
   Normal :
1110- - - - -
- 014
  FREEZING DRIZZLE : -
1
-
-
-
-
-
-
-
-
-
-
1
   Normal :
110- - - - - -
- 013
  ICE PELLETS :
3
-
-
1
-
-
-
-
-
-
 
 
4
   Normal :
111
10
- - - -
0017
  SNOW : 24
7
8
3
-
-
-
-
-
 
 
 
42
   Normal :
21171150- - - -
171678
  SNOW PELLETS :  -
-
-
-
-
-
-
-
-
 
 
 
2
   Normal :
01000-
- - -
0103
  SNOW GRAINS : -
1
-
-
-
-
-
-
-
 
 
 
1
   Normal :
10
0- - -
- - -
0012
  ICE CRYSTALS : -
-
-
-
-
-
-
-
-
-
-
 
0
   Normal :
00
-
- - - - - -
- - 0
0
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR

 DAYS WITH : Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  FOG : 9
2
4
4
5
1
 
 
 
 
 
 
25
  FREEZING FOG : -
1
-
-
-
-
-
-
-
-
 
 
1
  FOG OR FREEZING FOG : 9
2
4
4
5
1
 
 
 
 
 
 
25
   Normal :
224442111
33329
  BLOWING SNOW : -
-
-
-
-
-
-
-
-
-
 
 
0
   Normal :
1100- - - - -
- 003
  HAZE : -
-
-
-
4
2
 
 
 
 
 
 
6
   Normal :
012143543
01226
  SMOKE : -
-
-
-
-
-
-
-
-
-
-
-
0
   Normal :
---------
---0
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  The following are rare. Any occurrences will be noted below : Funnel Cloud, Waterspout, Ice Fog, Dust, Blowing Dust, Blowing Sand, Aurora, Earthquake.
  None.

 BRIGHT SUNSHINE (h)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  BRIGHT SUNSHINE DURATION :
40126 176 189 267 239              
   % of Normal :
56%106% 97% 92% 105% 93%              
   Normal :
72
119
182
205
255
256
246
219
180
129
8148
1992
  MAX. SOLAR RADIATION : (W/m)
631
895
1132
1267
1317
1255
 
 
 
 
 
 
1317
   Date :
1/17
2/29
3/17
4/21
5/27
6/30
 
 
 
 
 
 
5/27
   Time :
1234
1221
1251
1343
1345
1312
 
 
 
 
 
 
1345
   Normal :
6758601022 1209 1192 1245 1193 1119 1030 896 687 531 1271
  AVERAGE DAILY MAX. SOLAR RADIATION : (W/m)
255566 735 760 1035 1023              
   Normal :
359521675844909994956924761576417284685
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
 
 DARK SKY (m/a"2) Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  DARKEST SKY :
20.25
20.18
20.10
20.25
20.23
20.19
 
 
 
 
 
 
20.25
   Date :
1/10
2/8
3/4
4/4
5/1
6/8
 
 
 
 
 
 
1/10+
   Time :
0449
0544
0410
0245
0256
0045
 
 
 
 
 
 
0449
   Normal :
20.24
20.06
20.27
20.25
20.27
20.32
20.31
20.43
20.44
20.48
20.32
20.23
20.61
  AVERAGE DAILY DARKEST SKY :
18.52
19.28
19.38
19.19
19.53
19.78
 
 
 
 
 
 
 
   Departure From Normal :
-0.65
+0.16
-0.06
-0.39
-0.18
-0.04
 
 
 
 
 
 
 
   Normal :
19.1719.1219.4419.5819.7119.8219.9219.9819.9019.7519.5519.1119.59
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
 
All times are local.
+ indicates first of multiple occurences (on different dates).
End of month S.O.G. defined as S.O.G. at 7 AM on last day of the month.
Days With Precipitation include trace amounts.

Records from Grimsby 1910-13, Rock Chapel 1914-1966/04/17, Royal Oak 1966/04/18-1974, Grimsby 1975-1985/08/20,
     Rittenhouse 1985/08/21-1993/09/30, Vineland Station 1993/10/01-2003/09/17, and Grimsby Mountain 2003/09/18 to present.





21