XGY   Grimsby Mountain, ON
Weather Observed At   43-11  N    79-34  W
2023
Note all stats on this page use calendar days (0000-2359). MSC stats use "climate days" (normally 0800-0759).
** >> NEW NORMALS INTRODUCED COVERING 2004-2020 PERIOD << **   

 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 : 5.6
16.2
 11.9
29.2
30.2
32.2
32.5
 29.4
 33.3
 30.5
 15.5
13.3
 33.3
   Date : 1/17 2/153/26 4/14
5/31 6/2
7/6 8/9 9/5
10/3 11/16 12/9 9/5
   Time : 1604 1430
 1537
  1446 1435 1450 1405 1337
 1404
1457 1330
 1107 1404
   Normal :
11.9
10.8
17.5
25.031.132.834.0
32.8
31.426.118.512.8
34.8
  AVERAGE HIGH : 2.0
4.3
 6.0
 14.0
19.2
 23.6
27.5
 24.8
 23.2
 17.1
 8.8
 5.7
 14.7
   Normal  :
0.0
 		1.05.6
 		12.1
 		19.724.8
 		27.9
 		26.722.815.6
 		8.9
 		2.7
 		14.0
  AVERAGE :
 -0.3
 		0.0
 		2.0
 		8.9 13.4
 		18.9
22.4
 		20.1
 		18.5
 		13.0
 		4.6
 		3.3
 		10.4
   Departure from Normal  :
+3.5
+3.3 +0.7 +1.7 -0.6 -0.6 -0.2 -1.5 +0.5 +1.7 -0.3 +3.8
 		+1.0
   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 : -2.6
 -4.3
 -2.0
 3.8
 7.6
  14.1
 17.3
15.5
 13.9
 8.9
 0.4
 0.9
 6.1
   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 : -12.1
 -16.5
-7.1
 -3.5
1.8
8.8
13.6
11.1
 8.5
 -1.2
 -5.9
 -4.3
 -16.5
   Date : 1/15
2/43/19
  4/2
 5/2
 6/5
 7/31
 8/19
 9/19
 10/31
 11/2912/19
 2/4
   Time : 0727 0449 0649
 0657
0631 0248 0444 06250707 0802 0550 0721 0449
   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
 100
 99
 100
95
 100
 98
97
 97
 97
 97
 100
 100
   Date : 1/3+
2/93/31
 4/4+
5/2+6/25
 7/2+
 8/15+
 9/7+
 10/1+
 11/21+
 12/26+
 1/3+
   Time : 1745
1337
1951
 0930
 2116
 0500
 1249
 2038
 0737
 0547
 1837
 0654
 1745
  AVERAGE :
84
 		72
71
 		69
62
70
 		74
75
 		76
 		76
 		73
 		84
 		74
   Departure from Normal  :
+9 -1 +2 +2 -6 0
 +4 +3 +2 0
 -2 +6 +2
   Normal  :
75
73
 69
 67
 68
 70
 70
 72
 74
 76
 75
 78
 72
  LOWEST : 45
 34
 22
 17
 14
20
 37
 41
 38
 43
 38
 48
 14
   Date : 1/31
2/3
 3/15
  4/14
 5/27
6/7
 7/18
8/1
 9/27
 10/3
 11/3
 12/13
 5/27
   Time : 1338
1229
 1442
  1537
 1837
1558
 1420
 1510
 1347
 0612
 1557
 1524
 1837
 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 : 4.8
 7.3
 10.3
  14.6
  15.3
  22.1
 24.9
 24.1
 25.0
 20.6
 10.7
 11.0
 25.0
   Date : 1/17
2/15
 3/25
 4/16
 5/20+
 6/26
 7/27
 8/12
 9/5+
 10/4
 11/7
 12/9+
 9/5+
   Time : 1604
1323
 1549
  2001
 0333
1006
 1214
 12331138
 1137
 0236
 2237
 1138
  AVERAGE :-2.6
 		-4.8
 		-3.0
 		3.0
 		5.2 12.5
17.6
 		15.6
 		14.3
 		8.8
 		0.2
 		0.9
 		5.6
   Departure from Normal  :
+4.7
 		+2.6
 		+1.1
 		+2.1
 		-2.5
 		-1.0
 		+1.1
 		-0.6
 		+1.0
 		+1.6
 		-0.8
 		+4.6
+1.1
   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 : -15.9
 -25.6
 -13.3
 -14.0
-7.1
 -2.5
 8.9
 6.5
 5.6
 -4.6
 -9.6
 -8.3
 -25.6
   Date : 1/31
2/3
 3/15 4/2
 5/9
6/7
7/31
 8/31
 9/23
 10/31
 11/29
 12/14
 2/3
   Time : 0726
0914
 1442
  0700
  1432
 1603
2305
 1616
 2237
 1457
 0216
 0637
 0914
  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
184.6
202.7
224.3
231.9
239.4
133.6
1164.6
  TOTAL :93.5
 93.4
 120.6
 116.9
42.0
80.4
186.1
 123.1
 24.6
 73.3
 56.7
 114.6
 1125.2
   % of Normal  :
129% 134%
156%
116%
 52%  97% 235%
159%
 32% 72%
 75%
134%
 115%
   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 (%) :69/31
55/45
47/53
99/1
-
-
-
-
-
-
98/2
91/9
87/13 
   Normal :
59/41
 		43/57
 		66/34
 		92/8100/0-
 		--
 		-100/0
 		88/12
 		64/36
 		85/15
  EVAPOTRANSPIRATION :-11.8
-32.3
 -29.8
  -78.5
 -113.9
 -100.2
-99.1
 -98.1
 -78.3
 -47.9
 -31.1
 -13.3
 -734.3
  NET MOISTURE : +81.7
 		+61.1
 		+90.8
 		+22.4
 		 -71.9
 		 -19.8
 		+86.6
 		+25.0
 		-53.7
 		+25.4
 		+25.6
 		+101.3
 		+390.9
 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
184.6
202.7
224.3
231.9
230.0
127.4
1027.2
  TOTAL :64.3
51.3
56.4
116.3
 42.0
80.4
186.1
123.1
24.6
73.3
55.7
103.9
977.4
   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 : 32.1
 30.6
 15.3
 25.4
 21.6
 30.0 41.8
 39.6
 15.1
 14.8
 11.3
 24.2
 41.8
   Date : 1/4
2/9
 3/25
 4/1
 5/20
 6/12
 7/29
 8/15
 9/7
 10/5
 11/21
 12/27
 7/29
  HEAVIEST RAIN RATE : (mm/h) 42.4
 56.0
 29.8
 198.6
35.6
56.4
 155.6
 180.0
 245.2
 120.0
 84.0
 16.6
 245.2
   Date : 1/4
2/17
 3/25
 4/5
5/20
 6/25
 7/20
 8/24
 9/7
 10/6
 11/8
  12/27
 9/7
   Time : 1811
0209
 1429
 1147
 0420
 2354
 1910
 2146
 0410
 0508
 2305
 0658
 0410
 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 :29.6
 21.0
 44.0
 TR
-
 -
 		-
 		-
 		-
 		-
 		1.4
 10.6
 106.6
   % of Normal  :
86% 54%
200%
0%

        0%
17%
35%
76%
   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 : 12.8
 9.8
 20.6
 TR
-
 -
 -
 -
 -
 -
 1.2
 3.0
 20.6
   Date : 1/25
 2/27
 3/10
  4/17+
 -
 -
-
-
-
-
 11/28
 12/7+
 3/10
  WATER EQUIVALENT RATIO : 10.1 5.0
6.9
TR
-
-
-
-
-
-
14.0
9.9
7.2
   Normal :
11.7
 		9.6
 		8.5
 		7.6
 		1.7-
 		-
 		-
 		-
 		1.5
 		8.8
 		9.7
 		10.0
  HIGHEST SNOW ON GROUND : 14
 17
 36
  TR
 -
 -
 		-
 		-
 		-
 		-
 		1
 3
 36
   Date : 1/26
 2/27
 3/10
  4/24
-
 -
 -
 -
 -
 11/28
 12/6
 3/10
   Normal : 19272240-
- - -
0
51531
  AVERAGE SNOW ON GROUND : 3
4
 18
  0
-
-
-
-
-
 0
 TR
 2
   Normal :
8148TR
0-
- - -
0
143
  SNOW ON GND. AT END OF MONTH : 7
13
0
0

-
-
-
-
0
TR
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 :
26
 32
 34
 26
21
24
 24
 18
 20
 24
 24
 26
 34
                                   / DIRECTION : 030
060
 240
 020
 030
 090
 030
 080
 080
 010
 220
 190
 240
  Date : 1/13
2/23
 3/25
 4/1
 5/25
 6/3
 7/29
 8/6+
 9/26
 10/15
 11/3+
 12/12
 3/25
  Time : 0113
0132
 2123
  2302
 0200
1325
 1315
 1930
 1530
 0014
 1323
 1025
 2123
  AVERAGE DAILY PEAK GUST :
15.3
21.2
 18.8
 16.2
12.4
 11.7
10.1
 11.0
 11.5
 13.6
 15.6
 13.4
 13.4
  PEAK WIND DIRECTION : (days)











   NORTH :
4
 5
 8
 5
6
4
 4
 10
 14
 11
 7
 6
 84
   NORTHEAST :
10
 5
 6
 10
 13
 9
 9
 3
 2
 1
 -
 4
 72
   EAST :
2
 1
 3
 1
2
 8
 4
 5
 5
 -
 2
 2
 35
   SOUTHEAST :
-
 -
 -
-
 -
 -
 1
 -
 -
 -
 -
 1
 2
   SOUTH :
-
 -
 1
 3
-
 1
 -
 3
1
 13
 7
 		7
 		36
   SOUTHWEST :
11
 15
 11
 10
 7
3
 7
 4
 5
 5
 7
 		5
 90
   WEST :
4
 2
 2
 1
3
 1
 4
 5
 2
 1
 7
 		3
 35
   NORTHWEST :
-
 -
 -
 -
 -
 4
 2
 1
 1
 -
 -
 3
 11
 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.  :
 30.45
 30.70
 30.51
 30.64
30.43
30.25
30.14
 30.28
 30.35
 30.33
 30.53
 30.65
 30.70
   Date :
1/7
2/24
 3/8
 4/8
 5/14
  6/21
 7/31
 8/22
 9/26
 10/1
 11/12
 12/13
2/24
   Time :
2245
2045
 0930
  0845
  1115
  1000
 2345
 1004
 1038
 1112
 0922
 1949
 2045
   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. :
30.02
 		30.03
 		30.04
 		 30.01
 		30.06
29.88
29.90
 		29.92
 		30.08
 		29.93
 		30.05
 		30.04
 		29.97
   Departure from Normal  :
0.00 +0.01
 -0.01
 		+0.06
 +0.10
-0.03
 		-0.02
 		-0.03
 		+0.04
-0.07 0.00 +0.01
-0.02
   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. :
 29.38
 29.37
 29.31
 29.28
29.17
 29.50
 29.59
 29.56
 29.71
 29.43
 29.56
 29.27
 29.17
   Date :
1/26
2/28
 3/4
  4/1
 5/1
 6/14
 7/13
 8/7
 9/7
 10/20
 11/7
 12/18
 5/1
   Time :
 0045
0115
 0100
 0600
0945
 0700
 0645
 1959
 1610
 1531
 0133
 1312
 0945
   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 :
1
1
 2
3
-
 3
 9
 7
 3
1
 3
 -
33
   Normal :
001246763
2
 00 31
  RAIN :
 14
 8
 11
 16
7
 16
 21
 18
 10
 20
 11
 14
 166
   Normal :
7510141615141312
18129146
  DRIZZLE :
 5
 2
 4
 1
 -
 2
 1
 4
 1
 1
 3
 11
35
   Normal :
213221002
33423
  HAIL :
 -
 -
 -
 1-
 -
 -
 -
 -
 -
 1
 -
2
   Normal :
- - - 00000-
0- - 1
  FREEZING RAIN : 3
 6
 1
 -
-
 -
 -
 -
 -
 -
 1
 -
11
   Normal :
1110- - - - -
- 014
  FREEZING DRIZZLE : -
 3
 -
-
 -
 -
 -
 -
 -
 -
 -
 -
3
   Normal :
110- - - - - -
- 013
  ICE PELLETS :
 4
 4
 2
 1
 -
 -
 -
 -
 -
 -
 1
 -
12
   Normal :
111
10
- - - -
0017
  SNOW : 17
 11
 14
 3
 -
 -
 -
 -
 -
 -
 4
 10
59
   Normal :
21171150- - - -
171678
  SNOW PELLETS :  -
 1
 -
 1
 -
 -
 -
 -
 -
 -
 -
 -
2
   Normal :
01000-
- - -
0103
  SNOW GRAINS : 5
1
 -
-
-
-
-
-
-
-
 -
-
6
   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 : 5
1
 1
6
-
3
 2
1
-
-
 1
9
29
  FREEZING FOG : -
-
 -
-
-
-
-
-
-
-
 -
-
0
  FOG OR FREEZING FOG : 5
 		1
 		1
 		6
 		-
 		3
 		2
 		1
 		-
 		-
 		1
 		9
 		29
   Normal :
224442111
33329
  BLOWING SNOW : -
2
 1
-
-
-
-
-
-
-
-
-
3
   Normal :
1100- - - - -
- 003
  HAZE : -
-
 2
2
-
3
2
1
-
-
 1
1
12
   Normal :
012143543
01226
  SMOKE : -
-
-
-
-
13
4
-
-
-
-
-
17
   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 :
44110 170 212 279 243 226 208 190 125 95 28 1930
   % of Normal :
61%
92%
93%
 103% 109% 95% 92% 95% 109% 97% 117% 58% 97%
   Normal :
72
119
182
205
255
256
246
219
180
129
8148
1992
  MAX. SOLAR RADIATION : (W/m²)
 644
 857
 1026
 1056
1152
 1128
 1110
 1160
 1046
 984
 823
 548
 1160
   Date :
1/31
2/24
 3/30
 4/23
5/1
 6/24
 7/22
 8/12
 9/14
 10/8
 11/1
 12/13
 8/12
   Time :
1252
1259
 1347
 1226
 1426
 1416
 1333
 1408
 1333
 1319
 1332
 1231
 1408
   Normal :
6758601022 1209 1192 1245 1193 1119 1030 896 687 531 1271
  AVERAGE DAILY MAX. SOLAR RADIATION : (W/m²)
248535 662 790 916 883 883 981 791 619 485 241 670
   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 :
19.85
19.95
 19.88
 20.01
 20.02
 20.55
20.12
 20.18
 20.12
 20.22
 20.11
 19.94
 20.55
   Date :
1/24
2/13+
 3/19
 4/18
5/17
 6/18
7/21
 8/14
 9/13
 10/15+
 11/14
 12/11
 6/18
   Time :
0218
0030
 0134
  0125
 0125
 0214
 0234
 0341
 0347
 0304
 0254
 0604
 0214
   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 :
18.53
 19.18
 18.96
 19.51
 19.50
 19.54
 19.69
 19.70
 19.75
 19.42
 19.47
 18.87
 19.34
   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 1993/10/01-2003/09/17, and Grimsby Mountain 2003/09/18 to present.




21