XGY   Grimsby Mountain, ON
Weather Observed At   43-11  N    79-34  W
2026
Stats since 2004 use calendar days (0000-2359). Pre-2004 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 : 14.7
8.6
 22.9
25.5
30.8  
  
 
  
 
 
  
 30.8
   Date : 1/9 2/27
3/304/3+ 5/18






5/18
   Time : 1248 1456
 1450
1543
 1531






1531
   Normal :
11.9
10.8
17.5
25.031.132.834.0
32.8
31.426.118.512.8
34.8
  AVERAGE HIGH : -1.9
 		0.5
 		8.0
 		13.9
 		18.7






 
   Normal :
0.0
 		1.05.6
 		12.1
 		19.724.8
 		27.9
 		26.722.815.6
 		8.9
 		2.7
 		14.0
  AVERAGE :
 -5.6
 		-4.1
 		2.9
 		8.6
 		13.1






 
   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
   Departure from Normal :
-1.8
-0.8
 +1.6
 +1.4
 -0.9






-0.1
  AVERAGE LOW : -9.4
 		-8.6
 		-2.2
 		3.3
 		7.6






 
   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 : -20.8
 -23.1
 -14.2
 -4.6
 0.7






-23.1
   Date : 1/30
2/9
3/2
 4/8 5/1+






2/9
   Time : 0756 0612
 0619
 0311
 0520






0612
   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 : 97
 99
 99
 100
 98






100
   Date : 1/6+
2/20
3/7
 4/3
 5/23+






4/3
   Time : 2110
1333
 0122
 0233
 2223






0233
  AVERAGE :
77
 		76
 		74
 		74
 		68






72
   Normal :
75
73
 69
 67
 68
 70
 70
 72
 74
 76
 75
 78
 72
   Departure from Normal :
+2 +3 +5 +7 0







  LOWEST : 47
 37
 34
 35
 28






28
   Date : 1/23
2/1
 3/9
 4/21
 5/15






5/15
   Time : 1305
1405
 1531
 1644
 1236






1236
 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 : 9.8
 5.4
 16.5
 19.3
 21.5






21.5
   Date : 1/9
2/20
 3/31
 4/16
 5/19






5/19
   Time : 1222
1428
 1557
 1216
 1204






1204
  AVERAGE :-9.0
 		-7.6
 		-1.4
 		4.2
 		7.2






 
   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
   Departure from Normal :
-1.7
 		-0.2
 		+2.7
 		+3.3
 		-0.5







  LOWEST : -23.2
 -25.7
 -17.6
 -9.8
 -4.2






-25.7
   Date : 1/30
2/9
 3/2
4/7
 5/3+






2/9
   Time : 0752
0610
 0525
 0721
 0311






0610
  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 :80.6
 40.9
 131.0
 108.9
 115.1







   Normal Precipitation :
72.6
 69.8
 77.1
 100.9 80.9 83.2
 79.3 77.2
 76.6 101.8
 75.4
 85.3
 980.1
   % of Normal :
+11% -41% +70% +8% +42%







  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 (%) :39/61
 		70/30
 		92/8
 		96/4
 		-
 		-
-
 		-
 		-
 		-


   Normal :
59/41
 		43/57
 		66/34
 		92/8100/0-
 		--
 		-100/0
 		88/12
 		64/36
 		85/15
  EVAPOTRANSPIRATION :-14.9
-23.1
 -49.6
 -67.6
 -114.4







  NET MOISTURE : +65.7
 		+17.8
 		+81.4
 		+41.3
 		+0.7







 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 :31.3
28.5
 120.5
 104.6
 115.1







   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 : 14.6
 18.5
 30.6
 23.1
 60.2






60.2
   Date : 1/6
2/18
 3/11
 4/25
 5/23






5/23
  HEAVIEST RAIN RATE : (mm/h) 15.4
 		19.4
 		101.0
 		80.6
 		157.8






157.8
   Date : 1/6
2/20
3/7
 4/15
 5/19






5/19
   Time : 1556
1223
 0123
 0430
 1928






1928
 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 :84.4
 15.8
 14.8
 1.4
 -
 -
 		-
 		-
 		-
 		-


   Normal :
34.6
38.7
22.0
6.2
TR
0
0
0
0
0.1
8.1
30.1
139.8
   % of Normal :
+144% -53% -33% -77% -
        -


  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 : 27.0
 3.4
 8.2
 1.0
 -
 		-
 		-
 		-
 		-
 		-

27.0
   Date : 1/15
 2/22
 3/13
 4/6
 -
 -
-
-
-
-

1/15
  WATER EQUIVALENT RATIO : 17.112.7 14.1 3.3 -
 		-
 		-
 		-
 		-
 		-


   Normal :
11.7
 		9.6
 		8.5
 		7.6
 		1.7-
 		-
 		-
 		-
 		1.5
 		8.8
 		9.7
 		10.0
  HIGHEST SNOW ON GROUND : 40
 28
 8
 1
 -
 -
 		-
 		-
 		-
 		-


   Date : 1/26
 2/1
 3/1
 4/6
 -
 -
 -
 -
 -
 -


   Normal : 19272240-
- - -
0
51531
  AVERAGE SNOW ON GROUND : 14
 		18
 		1
 		0
 		-
 		-
 		-
 		-
 		-
 		-


   Normal :
8148TR
0-
- - -
0
143
  SNOW ON GND. AT END OF MONTH : 29
 		5
 		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 / DIRECTION : 230
 010
 230
 360
 200






230
                                   / SPEED :
30
30
 34
 30
 26






34
  Date : 1/9
2/7
 3/14
 4/25
 5/4






3/14
  Time : 1703
0146
 0337
 1437
 1644






0337
  AVERAGE DAILY PEAK GUST :
18.5
 		17.7
 		19.4
 		18.1
 		16.3






 
  PEAK WIND DIRECTION : (days)











   NORTH :
4
 		7
 9
 		10
 		15






45
   NORTHEAST :
2
 1
 2
 3
 -






8
   EAST :
-
 -
 1
 2
 2






5
   SOUTHEAST :
-
 1
 1
 -
 -






2
   SOUTH :
12
 8
 		4
 7
 7






38
   SOUTHWEST :
8
 3
 9
 2
 2






24
   WEST :
5
 7
 4
 4
 5






25
   NORTHWEST :
-
 1
 1
 2
 -






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.  :
 30.69
 30.46
 30.65
 30.57
 30.39






30.69
   Date :
1/24
2/8
3/2
 4/8
 5/22






1/24
   Time :
1105
1047
 0851
 0810
 0832






1105
   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. :
29.95
 		29.95
 		30.00
 		30.01
 		29.96







   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
   Departure from Normal :
-0.07
 		-0.07
 		-0.05
 		+0.06
 		0.00







  LOWEST S.L.P. :
 29.37
 29.32
 29.19
 29.61
 29.48






29.19
   Date :
1/13
2/20
 3/16
 4/18
 5/5






3/16
   Time :
 1634
1248
 1040
 1251
 0456






1040
   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
5
3






10
   Normal :
001246763
2
 00 31
  RAIN :
 6
 4
 14
 22
 18






64
   Normal :
7510141615141312
18129146
  DRIZZLE :
 1
 2
 2
 4
 2






11
   Normal :
213221002
33423
  HAIL :
 -
 -
 -
 -
-






0
   Normal :
- - - 00000-
0- - 1
  FREEZING RAIN : -
 1
 1
 -
 -
 -
 -
 -
 -
 -

2
   Normal :
1110- - - - -
- 014
  FREEZING DRIZZLE : 1
 3
 1
 -
 -
 -
 -
 -
 -
 -

5
   Normal :
110- - - - - -
- 013
  ICE PELLETS :
 -
 1
 1
 -
 -
 -
 -
 -
 -


2
   Normal :
111
10
- - - -
0017
  SNOW : 25
 18
 9
 4
 -
 -
 -
 -
 -


56
   Normal :
21171150- - - -
171678
  SNOW PELLETS :  -
 -
 -
 1
 -
 -
 -
 -
 -


1
   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 : 2
4
 7
7
4





24
  FREEZING FOG : -
2
 2
-
-
-
-
-
-

4
  FOG OR FREEZING FOG : 2
 		4
 		7
 		7
4







24
   Normal :
224442111
33329
  BLOWING SNOW : 5
-
 -
-
-
-
-
-
-
-


5
   Normal :
1100- - - - -
- 003
  HAZE : 1
5
 3
1
-

10
   Normal :
012143543
01226
  SMOKE : -
-
-
-
-







0
   Normal :
---------
---0
  AURORA : 3
-
-
-
-







3
   Normal :
---------
---0
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR

 BRIGHT SUNSHINE (h)
 Jan
 Feb
 Mar
 Apr
 May
 Jun
 Jul
 Aug
 Sep
 Oct
 Nov
 Dec
 YEAR
  BRIGHT SUNSHINE DURATION :
73128 166 180 252







   Normal :
72
119
182
205
255
256
246
219
180
129
8148
1992
   % of Normal :
+1%+8% -9% -12% -1%







   % of Possible :
25%44% 49% 45% 55%







  MAX. SOLAR RADIATION : (W/m²)
 740
 856
 1081
 1088
 1361






1361
   Date :
1/31
2/24
 3/28
 4/14
 5/7






5/7
   Time :
1340
1226
 1424
 1246
 1223






1223
   Normal :
6758601022 1209 1192 1245 1193 1119 1030 896 687 531 1271
  AVERAGE DAILY MAX. SOLAR RADIATION : (W/m²)
384544 692 817 1017







   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 :
20.09
19.73
 20.15
 20.43
 20.14






20.43
   Date :
1/11
2/26+
 3/16
 4/17
 5/15






4/17
   Time :
0109
0440
 0336
 0420
 0247






0420
   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 :
18.78
 18.91
 19.51
 19.52
 19.57







   Normal :
19.1819.1319.4419.5819.7119.8219.9219.9819.8919.7519.5519.1219.59
   Departure From Normal :
-0.40
 		-0.22
 		+0.07
 		-0.06
 		-0.14







 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.




214.44