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
 
 
 
  
  
  
  
  
 22.5
   Date : 1/9 2/28
3/5 4/9
    
      
      4/9
   Time : 2257  1110
 12401819        
  
   
   1819
   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
 		 
 		 
 		 
 		 
 		 
 		 
 		 
 		 
 		 
   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  
 		 
 		 
 		 
 		 
 		 
 		 
 		 
 		 
   Departure from Normal  :
+2.3
+4.5
 +3.2
+1.7
               
 		 
   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
 		 
 
 
 		 
 		 
 		 
 		 
 		 
 		 
   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
  
  
  
  
  
  
  
  
 -15.8
   Date : 1/20
2/243/22
 4/25 
  
  
  
  
  
   
 1/20
   Time : 0620 0721 0433
 0604
                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
  
  
  
 
  
  
  
  
 100
   Date : 1/25+
2/233/4+
 4/11+
   
  
  
  
  
  
  
 1/25+
   Time : 2123
0829
 0824
 2222
  
  
  
  
  
  
  
  
 2123
  AVERAGE :
85
 		73
 		73
 		73
 		 
 		 
 		 
 		 
 		 
 		 
 		 
 		 
 		 
   Departure from Normal  :
+10 0 +4 +6    
        
      
   Normal  :
75
73
 69
 67
 68
 70
 70
 72
 74
 76
 75
 78
 72
  LOWEST : 53
 37
 27
 30
  
  
  
  
  
  
  
  
 27
   Date : 1/17
2/26
 3/13
 4/22
  
  
  
  
  
  
  
  
 3/13
   Time : 1426
1606
 1724
 1347
  
  
  
  
  
  
  
  
 1724
 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
 13.5
 12.0
 17.9
  
 
 
  
  
  
  
  
 17.9
   Date : 1/9
2/28
 3/5
 4/28
  
 
  
  
  
  
  
  
 4/28
   Time : 2256
1109
 1239
 1556
  
 
  
   
  
  
  
 1556
  AVERAGE :-3.7
 		-3.4
 		-0.2
 		3.9
 		   
 		 
 		 
 		 
 		 
 		 
 		 
 		 
   Departure from Normal  :
+3.6
 		+4.0
 		+3.9
 		+3.0
 		 
 		 
 		 
 		 
 		 
 		 
 		 
 		 
 
   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 : -18.6
 -15.9
 -11.4
 -6.7
  
  
  
  
  
  
  
  
 -18.6
   Date : 1/17
2/24
 3/214/25
  
  
  
  
  
  
  
  
 1/17
   Time : 0415
1625
 2109
 1733
  
 
  
  
  
  
  
  
 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
  
  
 
  
  
  
  
  
  
   % of Normal  :
191%  47% 74%  107%
    
 
    
  
 
 
   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
  
  
 
  
  
  
  
  
  
  NET MOISTURE : +127.1
 		+0.2
 		+3.7
 		+40.2
 		 
 
 
 		 
 		 
 		 
 		 
 		 
 		 
 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
 
 
 
 
 
 
 
 
 
   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
  
    
  
  
  
  
  
 36.3
   Date : 1/26
2/27
 3/14
 4/11
  
  
  
  
  
  
  
  
 1/26
  HEAVIEST RAIN RATE : (mm/h) 26.4
 		180.0
 		30.0
 		164.6
 		 
 		 
 		 
 		 
 		 
 		 
 		 
 		 
 		180.0
   Date : 1/26
2/283/14 4/28
  
  
  
  
  
  
  
  
 2/28
   Time : 0508
0320
 2124
 0955
  
  
  
  
  
  
  
  
 0320
 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
  
 
  
  
  
  
  
  
 35
                                   / DIRECTION : 170
260
 260
 160
  
  
  
  
  
  
  
  
 170
  Date : 1/13
2/28
 3/20
 4/23
  
  
  
  
  
  
  
  
 1/13
  Time : 1313
1746
 1647
 1437
  
  
  
  
  
  
  
  
 1313
  AVERAGE DAILY PEAK GUST :
17.2
 		16.8
 		16.7
 		17.7
 		 
 		 
 
 		 
 		 
 		 
 		 
 		 
 		 
  PEAK WIND DIRECTION : (days)











   NORTH :
9
 		8
 12
 9
  
  
  
  
  
  
  
  
 38
   NORTHEAST :
2
 1
 2
 6
  
  
  
  
  
  
  
  
 11
   EAST :
-
 1
 -
 -
  
  
  
  
  
  
  
  
 1
   SOUTHEAST :
1
 1
 1
 2
  
  
  
  
  
  
  
  
 5
   SOUTH :
8
 6
 9
 5
  
  
  
  
  
  
  
 		 
 		28
   SOUTHWEST :
7
 4
 1
 2
  
  
  
  
  
  
  
 		 
 14
   WEST :
3
 7
 6
 5
 
  
  
  
  
  
  
 		 
 21
   NORTHWEST :
1
 1
 -
 1
  
  
  
  
  
  
  
  
 3
 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
  
 
 
  
  
  
  
  
 30.55
   Date :
1/21
2/293/1
 4/25
  
 
 
  
  
  
  
  
1/21
   Time :
1021
1836
 0808
 1053
  
  
 
  
  
  
  
  
 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
 		 
 		 
 		 
 		 
 		 
 		 
 		 
 		 
 		 
   Departure from Normal  :
-0.02
 		-0.06
 		-0.08 -0.05  
 
 		 
 		 
 		 
     
 
   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
  
  
  
  
  
  
  
  
 28.87
   Date :
1/9+
2/28
 3/16+
 4/12
  
  
  
  
  
  
  
  
 1/9+
   Time :
 2335
1108
 2316
 0553
  
  
  
  
  
  
  
  
 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
   Normal :
001246763
2
 00 31
  RAIN :
 10
 4
 13
 21
  
  
  
  
  
  
  
  
 48
   Normal :
7510141615141312
18129146
  DRIZZLE :
 8
 2
 3
 2
  
  
  
  
  
  
  
  
15
   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
 
 
  
 
 
 
  
 
19
  FREEZING FOG : -
1
 -
-
-
-
-
-
-
-
  
 
1
  FOG OR FREEZING FOG : 9
 		2
 		4
 		4
 		 
 		 
 		 
 		 
 		 
 		 
 		 
 		 
 		19
   Normal :
224442111
33329
  BLOWING SNOW : -
-
 -
-
-
-
-
-
-
-
 
 
0
   Normal :
1100- - - - -
- 003
  HAZE : -
-
 -
-
 
 
 
 
 
 
  
 
0
   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                  
   % of Normal :
56%106% 97% 92%                  
   Normal :
72
119
182
205
255
256
246
219
180
129
8148
1992
  MAX. SOLAR RADIATION : (W/m²)
 631
 895
 1132
 1267
  
  
  
  
  
  
  
  
 1267
   Date :
1/17
2/29
 3/17
 4/21
  
  
  
  
  
  
  
  
 4/21
   Time :
1234
1221
 1251
 1343
  
  
  
  
  
  
  
  
 1343
   Normal :
6758601022 1209 1192 1245 1193 1119 1030 896 687 531 1271
  AVERAGE DAILY MAX. SOLAR RADIATION : (W/m²)
255566 735 760                  
   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
  
  
 
  
  
  
  
  
 20.25
   Date :
1/10
2/8
 3/4
4/4
  
  
 
  
  
  
  
  
 1/10+
   Time :
0449
0544
 0410
 0245
  
  
  
  
  
  
  
  
 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
  
  
  
  
  
  
  
  
  
   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