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 33.1 35.3 30.1 29.5  
 
  
 35.3
   Date : 1/9 2/27
3/304/3+ 5/18 6/30 7/1 8/6 9/3


7/1
   Time : 1248 1456
 1450
1543
 1531
 1355
 1317
 1432
 1310


1317
   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
 		25.2
 		27.8
 		26.2
 		23.1


 
   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
 		19.6
 		22.8
 		21.5
 		18.8


 
   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
 +0.2
 -0.1
 +0.8


-0.1
  AVERAGE LOW : -9.4
 		-8.6
 		-2.2
 		3.3
 		7.6
 		14.1
 		17.7
 		16.8
 		14.5


 
   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 : -20.8
 -23.1
 -14.2
 -4.6
 0.7
 9.4
 10.3
 12.4
 8.5


-23.1
   Date : 1/30
2/9
3/2
 4/8 5/1+ 6/15 7/23 8/29 9/25


2/9
   Time : 0756 0612
 0619
 0311
 0520
 0504
 0447
 0405
 0321


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
 98
 98
 99
 100


100
   Date : 1/6+
2/20
3/7
 4/3
 5/23+
 6/18+
 7/5+
 8/2+
 9/2


4/3+
   Time : 2110
1333
 0122
 0233
 2223
 0617
 0541
 1851
 0446


0233
  AVERAGE :
77
 		76
 		74
 		74
 		68
 		72
 		74
 		77
 		75


72
   Normal :
75
73
 69
 67
 68
 70
 70
 72
 74
 76
 75
 78
 72
   Departure from Normal :
+2 +3 +5 +7 0 +2 +4 +5 +1



  LOWEST : 47
 37
 34
 35
 28
 22
 34
 43
 42


22
   Date : 1/23
2/1
 3/9
 4/21
 5/15
 6/2+
 7/13
 8/21
 9/7


6/2+
   Time : 1305
1405
 1531
 1644
 1236
 1411
 1528
 1451
 1515


1411
 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
 26.7
 28.0
 24.7
 25.5


28.0
   Date : 1/9
2/20
 3/31
 4/16
 5/19
 6/30
 7/1
 8/8
 9/2


7/1
   Time : 1222
1428
 1557
 1216
 1204
 1217
 1201
 1247
 1410


1201
  AVERAGE :-9.0
 		-7.6
 		-1.4
 		4.2
 		7.2
 		14.3
 		17.8
 		17.1
 		14.2


 
   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
 		+0.8
 		+1.3
 		+0.9
 		+0.9



  LOWEST : -23.2
 -25.7
 -17.6
 -9.8
 -4.2
 1.7
 6.4
 9.7
 4.9


-25.7
   Date : 1/30
2/9
 3/2
4/7
 5/3+
 6/2
 7/22
 8/20
 9/24


2/9
   Time : 0752
0610
 0525
 0721
 0311
 1411
 2101
 1801
 0321


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
 103.6
 218.8
 168.0
 20.2



   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% +25% +176% +118% -74%



  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
 -126.5
 -123.5
 -95.4
 -71.9



  NET MOISTURE : +65.7
 		+17.8
 		+81.4
 		+41.3
 		+0.7
 		-22.9
 		+95.3
 		+72.6
 		-51.7



 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
 103.6
 218.8
 168.0
 20.2



   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
 28.5
 109.2
 104.8
 11.4


109.2
   Date : 1/6
2/18
 3/11
 4/25
 5/23
 6/14
 7/21
 8/2
 9/9


7/21
  HEAVIEST RAIN RATE : (mm/h) 15.4
 		19.4
 		101.0
 		80.6
 		157.8
 		160.0
 		320.0
 		185.8
 		80.6


320.0
   Date : 1/6
2/20
3/7
 4/15
 5/19
 6/18
 7/21
 8/19
 9/9


7/21
   Time : 1556
1223
 0123
 0430
 1928
 0240
 1448
 1550
 1041


1448
 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
 270
 280
 360
 020


230
                                   / SPEED :
30
30
 34
 30
 26
 22
 21
 21
 24


34
  Date : 1/9
2/7
 3/14
 4/25
 5/4
 6/18
 7/9
 8/2+
 9/22+


3/14
  Time : 1703
0146
 0337
 1437
 1644
 1554
 1520
 2105
 1028


0337
  AVERAGE DAILY PEAK GUST :
18.5
 		17.7
 		19.4
 		18.1
 		16.3
 		12.1
 		11.9
 		9.7
 		13.1


 
  PEAK WIND DIRECTION : (days)











   NORTH :
4
 		7
 9
 		10
 		15
 		8
 		16
 		10
 		18


97
   NORTHEAST :
2
 1
 2
 3
 -
 2
 -
 -
 2


12
   EAST :
-
 -
 1
 2
 2
 2
 1
 4
 1


13
   SOUTHEAST :
-
 1
 1
 -
 -
 -
 -
 -
 -


2
   SOUTH :
12
 8
 		4
 7
 7
 6
 1
 2
 4


51
   SOUTHWEST :
8
 3
 9
 2
 2
 4
 1
 4
 1


34
   WEST :
5
 7
 4
 4
 5
 7
 11
 10
 		4


57
   NORTHWEST :
-
 1
 1
 2
 -
 1
 1
 1
 -


7
 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
 30.34
 30.24
 30.24
 30.51


30.69
   Date :
1/24
2/8
3/2
 4/8
 5/22
 6/3
 7/12+
 8/29
 9/23


1/24
   Time :
1105
1047
 0851
 0810
 0832
 0910
 0932
 0947
 1146


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
 		29.93
 		29.95
 		29.98
 		30.10



   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
 		+0.02
 		+0.03
 		+0.03
 		+0.06



  LOWEST S.L.P. :
 29.37
 29.32
 29.19
 29.61
 29.48
 29.27
 29.51
 29.67
 29.83


29.19
   Date :
1/13
2/20
 3/16
 4/18
 5/5
 6/18
 7/21
 8/2
 9/2+


3/16
   Time :
 1634
1248
 1040
 1251
 0456
 0637
 1603
 2015
 1719


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
 7
 9
 6
 1

33
   Normal :
001246763
2
 00 31
  RAIN :
 6
 4
 14
 22
 18
 14
 11
 16
 9


114
   Normal :
7510141615141312
18129146
  DRIZZLE :
 1
 2
 2
 4
 2
 1
 -
 -
 1


13
   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
4
 2
1
 2

33
  FREEZING FOG : -
2
 2
-
-
-
-
-
-

4
  FOG OR FREEZING FOG : 2
 		4
 		7
 		7
4
4
2
1
 2



33
   Normal :
224442111
33329
  BLOWING SNOW : 5
-
 -
-
-
-
-
-
-
-


5
   Normal :
1100- - - - -
- 003
  HAZE : 1
5
 3
1
-
1
3
-
 2

16
   Normal :
012143543
01226
  SMOKE : -
-
-
-
-
-
5
-
 -



5
   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 166 180 252 242 237 207 179



   Normal :
72
119
182
205
255
256
246
219
180
129
8148
1992
   % of Normal :
+1%+8% -9% -12% -1% -5% -4% -5% -1%



   % of Possible :
25%44% 49% 45% 55% 53% 51% 48% 48%



  MAX. SOLAR RADIATION : (W/m²)
 740
 856
 1081
 1088
 1361
 1301
 1137
 1201
 1037


1361
   Date :
1/31
2/24
 3/28
 4/14
 5/7
 6/20
 7/26
 8/22
 9/6


5/7
   Time :
1340
1226
 1424
 1246
 1223
 1227
 1324
 1350
 1154


1223
   Normal :
6758601022 1209 1192 1245 1193 1119 1030 896 687 531 1271
  AVERAGE DAILY MAX. SOLAR RADIATION : (W/m²)
384544 692 817 1017 1047 947 921 802



   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
 20.38
 20.20
 20.38
 20.36


20.43
   Date :
1/11
2/26+
 3/16
 4/17
 5/15
 6/17
 7/6
 8/23
 9/10


4/17
   Time :
0109
0440
 0336
 0420
 0247
 0245
 2336
 0355
 0321


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
  MEDIAN DAILY DARKEST SKY :
18.97
 19.14
 19.73
 19.81
 19.73
 20.03
 19.92
 20.01
 20.12



   Normal :
19.3419.3519.7119.8519.9620.0620.0820.1320.1020.0319.8119.3819.82
   Departure From Normal :
-0.37
 		-0.21
 		+0.02
 		-0.04
 		-0.23
 		-0.03
 		-0.16
 		-0.12
 		+0.02



  AVERAGE DAILY DARKEST SKY :
18.78
18.91
19.51
19.52
19.57
19.90
19.82
19.77
19.82



 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