XGY   Grimsby Mountain, ON
Weather Observed At   43-11  N    79-34  W
2021
Note all stats on this page use calendar days (0000-2359). MSC stats use "climate days" (normally 0800-0759).    
  2021 :   
 TEMPERATURE : Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  RECORD HIGHEST TEMPERATURE : 17.8
19.7
27.0
30.6
37.2
36.1
41.1
40.6
38.3
32.0
24.6
21.0
41.1
  HIGHEST TEMPERATURE : 5.6
10.6
21.4
22.8
32.3
34.1






34.1
  Date : 15th
24th
25th
9th
25th
29th






6/29
  Time : 1319 1218 1433 1510 1421 1619





1619
   2020 :
14.4
10.8
21.2
18.432.3
32.636.1
34.6
30.225.824.611.2
36.1
  AVERAGE HIGH TEMPERATURE : 0.9
0.4
9.9
12.2
19.6
26.8






 
  Departure from Normal  :
+3.9
+1.6
+5.7
+1.1
+1.1
+2.9






 
  Normal  :
-2.0
-1.2
4.2
11.1
18.5
23.9
26.7
25.5
20.4
13.4
7.0
0.8
12.4
   2020 :
2.62.1
7.211.1
17.5
26.3
30.528.3
22.6
15.011.8
3.5
14.9
  AVERAGE TEMPERATURE : (°C)
-1.7
-4.2
4.0
7.5
13.4
21.3






 
  Normal  :
-5.5
-4.9
0.1
6.3
12.8
18.4
21.4
20.5
15.6
9.3
3.7
-2.6
7.9
  AVERAGE LOW TEMPERATURE : -4.4
-8.8
-1.9
2.7
7.2
15.7






 
  Normal  :
-9.0
-8.5
-4.0
1.5
7.1
12.8
16.1
15.5
11.1
5.1
0.4
-6.0
3.5
  LOWEST TEMPERATURE : -14.5
-15.8
-9.9
-4.4
1.6
7.6






-15.8
  Date : 29th
17th
2nd
3rd
6th+
17th






2/17
  Time : 0630 0126 0312 0603 0547 0534





0126
   2020 :
-12.0 -15.7-8.7 -4.1 -2.28.415.311.6 5.6-4.3-4.2 -6.2-15.7
  RECORD LOWEST TEMPERATURE : -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
  2021
 RELATIVE HUMIDITY : Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  HIGHEST RELATIVE HUMIDITY : 100
95
96
100
99
98






100
  Date : 1st
5th+
26th
11th+
4th
9th+






1/1
  Time : 2155
0025
0703
2340
1300
0300






2155
  AVERAGE RELATIVE HUMIDITY : (%)
78
72
60
69
63
70






 
  Departure from Normal  :
+4 +3 -12 +7 -5 +2





 
  Normal  :
74
69
72
62
68
68
68
72
77
77
79
80
72
   2020 :
78
74
74
65
67
66
66
68
69
74 71 79
71
  LOWEST RELATIVE HUMIDITY : 28
33
14
15
16
23






14
  Date : 9th
3rd
22nd
26th
14th
15th






3/22
  Time : 1509
1340
1514
1510
1338
1526






1514
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  2021
 DEW POINT : Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  HIGHEST DEW POINT : 2.4
5.5
11.7
14.1
21.0
25.5






25.5
  Date : 15th
28th
24th
9th
25th
28th






6/28
  Time : 1253
2359
1335
1331
1139
1518






1518
  AVERAGE DEW POINT : (°C) -5.1
-8.7
-3.8
1.9
5.6
15.0






 
  Departure from Normal  :
+4.3
+0.9
+0.5
+1.6
-1.4
+2.7






 
  Normal : -9.4
-9.6
-4.3
0.3
7.0
12.3
15.3
15.3
11.5
5.5
0.4
-5.6
3.2
   2020 :
-3.7 -6.2-1.0 -0.85.413.3
17.4 15.6 11.0
6.12.4-2.74.7
  LOWEST DEW POINT : -17.3
-20.5
-25.0
-17.9
-6.9
0.8






-25.0
  Date : 28th
7th+
15th
2nd
12th
15th






3/15
  Time : 1346
2215
1615
0944
1741
1526






1615
  Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  2021
 PRECIPITATION : Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  TOTAL PRECIPITATION : (mm)
41.1
63.5
42.2
57.0
32.8
90.0






 
  % of Normal  :
57% 118% 67% 75% 43% 112%





 
  Normal :
71.9
53.6
62.6
76.4
76.3
80.7
77.1
74.2
93.5
74.9
69.9
73.5
884.6
   2020 :
112.667.288.474.365.635.628.240.738.9
100.975.990.7819.0
  EVAPOTRANSPIRATION : (mm) -17.6
-27.7
-73.0
-72.9
-112.6
-124.1






 
  NET MOISTURE : (mm) +23.5
+35.8
-30.8
-15.9
-79.8
-34.1






 
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  2021
 RAINFALL : Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  RECORD RAINFALL 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 RAINFALL IN 1 DAY : 12.2
5.9
27.4
15.2
20.6
17.4






27.4
  Date : 2nd
27th
26th
11th
28th
3rd






3/26
   2020 :
38.81.713.220.215.615.615.612.5
13.818.024.012.038.8
  HEAVIEST RAIN RATE : (mm/h) 144.0
21.8
108.6
23.0
50.6
180.0






180.0
  Date : 2nd
27th
26th
11th
26th
8th






6/8
  Time : 0011
0718
0649
0746
1925
1706






1706
   2020 :
50.02.039.440.681.244.4213.4102.866.258.228.615.4213.4
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  2021
 SNOWFALL : Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  TOTAL SNOWFALL : (cm)
20.8
60.2
0.2
16.2
-







 
  % of Normal  :
42%
185%
1%
200%
0%







 
  Normal :
49.6
32.6
18.0
8.1
0.2
0
0
0
0
0.1
6.0
33.4
148.0
   2020 :
24.053.014.02.2TR-
- - -
TR8.838.0140.0
  RECORD SNOWFALL IN 1 DAY : 50.8
40.6
38.1
27.8
2.5
-
-
-
-
11.4
22.9
61.0
61.0
  MOST SNOWFALL IN 1 DAY : 9.6
14.6
0.2
12.8
-







14.6
  Date : 26th
16th
1st
21st
-







2/16
   2020 :
9.012.011.0 1.4TR-
- - -
TR5.616.616.6
  Highest Snow on Ground : 10
33
13
15
-







33
  Date : 26th
22nd
1st+
21st
-







2/22
   2020 : 916151TR-
- - -
TR41616
  Average Snow on Ground : 2
20
3
1
-







 
   2020 :
271TR
0-
- - -
0TR41.2
  Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  2021
 WIND : Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  HIGHEST WIND SPEED : (kt)
24
32
30
24
27
21






32
  HIGHEST WIND DIRECTION : 220
010
210
360
360
260






010
  Date : 13th+
15th
11th+
1st+
28th
21st






2/15
  Time : 1435
2330
1705
1841
0651
1658






2330
   2020 :
272630 27262216222224302530
  AVERAGE DAILY PK GUST : (kt)
14.1
18.2
19.9
15.7
14.3
12.7






 
   2020 :
16.8
17.9
17.7
16.9
15.4
11.9
10.4
12.3
13.9
15.8
18.4
16.8
15.4
  PEAK WIND DIRECTION : (days)













   NORTH :
10
8
10
10
15
9






62
   NORTHEAST :
5
3
2
-
2
1






13
   EAST :
2
-
-
-
2
1






5
   SOUTHEAST :
-
-
-
-
-
-






0
   SOUTH :
4
5
8
10
2
2






31
   SOUTHWEST :
6
8
5
3
8
12






42
   WEST :
3
4
5
5
1
2






20
   NORTHWEST :
1
-
1
2
1
3






8
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  2021
 PRESSURE : Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  HIGHEST PRESSURE :
30.48
30.55
30.57
30.42
30.40
30.24






30.57
  Date :
1st
21st
20th
2nd 21st 1st+





3/20
  Time :
0345
0930
0915
1045
1130
0815






0915
   2020 :
30.88 30.58 30.68 30.22 30.37 30.50 30.1830.19 30.61 30.48 30.58 30.57 30.88
  AVERAGE PRESSURE : (in.)
30.04
30.11
30.11
29.93
30.11
29.97






 
  Departure from Normal  :
+0.04 +0.07 +0.12 -0.05 +0.15 +0.01





 
  Normal :
30.00
30.04
29.99
29.98
29.96
29.96
29.98
30.02
30.04
30.05
30.02
30.03
30.01
   2020 :
30.0629.9830.05 29.86 30.0129.98 29.9429.95 30.06
30.0530.06 29.9929.99
  LOWEST PRESSURE :
29.48
29.33
29.32
29.45
29.61
29.46






29.32
  Date :
16th
5th
26th
11th
2nd
21st






3/26
  Time :
1345
0445
1000
0930
0445
0945






1000
   2020 :
29.47 29.29 29.35 29.19 29.6529.53 29.61 29.44 29.52 29.59 29.27 29.4929.19
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  2021
 DAYS WITH : Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  THUNDERSTORM :
-
-
1
-
-
6






7
   2020 :
- -1-26532
1
-- 20
  FUNNEL CLOUD/WATERSPOUT :
-
-
-
-
-
-
-
-
-
-
-
-
0
   2020 :
- - - - - - - - -
1- - 1
  RAIN :
5
5
8
17
14
14






63
   2020 :
11415161491113 9
227 11142
  DRIZZLE :
3
-
1
1
1
1






7
   2020 :
335-2--- 3
44327
  HAIL :
-
-
-
-
-
-






0
   2020 :
- - - - - --- -
- - - 0
  FREEZING RAIN : 1
-
1
-
-
-
-
-
-
-


2
   2020 :
-2--- - - - -
- --2
  FREEZING DRIZZLE : 4
-
-
-
-
-
-
-
-
-


4
   2020 :
-2- - - - - - -
- --2
  ICE PELLETS :
2
-
1
1
-
-
-
-
-



4
   2020 :
12-
11
- - - -
- -16
  SNOW : 18
18
5
4
-
-
-
-
-



45
   2020 :
1622383- - - -
181475
  SNOW PELLETS :  1
-
-
-
-
-
-
-
-



1
   2020 :
-1--- -
- - -
1216
  SNOW GRAINS : 1
-
1
-
-
-
-
-
-



2
   2020 :
-1-- - -
- - -
1--2
  ICE CRYSTALS : -
-
-
-
-
-
-
-
-
-
-
-
0
   2020 :
-

- - - - - -
- -
0
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  2021
 DAYS WITH : Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  FOG : 1
-
1
4
2
1






9
   2020 :
318-3--12
1--19
  FREEZING FOG : 1
-
-
-
-
-
-
-
-
-


1
   2020 :
2--- - - - - -
- - -2
  ICE FOG : -
-
-
-
-
-
-
-
-
-
-

0
   2020 :
- - - - - - - - -
- - - 0
  BLOWING SNOW : -
-
-
1
-
-
-
-
-
-


1
   2020 :
-1-- - - - - -
- -- 1
  HAZE : 4
1
2
2
2
3






14
   2020 :
- 1---2-21
- 219
  SMOKE : -
-
-
-
-
-
-
-
-
-
-
-
0
   2020 :
- - - - - - - - -
- - - 0
  DUST : -
-
-
-
-
-
-
-
-
-
-
-
0
   2020 :
- - - - - - - - -
- - - 0
  BLOWING DUST : -
-
-
-
-
-
-
-
-
-
-
-
0
   2020 :
- - - - - - - - -
- - - 0
  BLOWING SAND : -
-
-
-
-
-
-
-
-
-
-
-
0
   2020 :
- - - - - - - - -
- - - 0
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  2017
 DAYS WITH : Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  AURORA : -
-
-
-
-
-
-
-
-
-
-
-
0
   2020 :
- - - - - - - - -
- - - 0
  EARTHQUAKE : -
-
-
-
-
-
-
-
-
-
-
-
0
   2020 :
- - - - - - - - -
- - - 0
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  2021
 BRIGHT SUNSHINE : Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  BRIGHT SUNSHINE DURATION : (h)
66134 206 221 266 255





 
   2020 :
57
119
154
216
245
270
241
213
179
118
89
49
1950
  HIGHEST SOLAR RADIATION : (W/mē)
656
903
1297
1225
1304
1225






1304
  Date :
30th
11th
29th
11th
11th
23rd






5/11
  Time :
1127
1143
1344
1358
1335
1410






1335
   2020 :
649834917 1196 1225 1276 1237 1130 964 994 713 531 1276
  AVERAGE DAILY MAX SOLAR RADIATION : (W/mē)
345
563
784
899
948
1032






 
   2020 :
3225345938939191012957937750581410 293 683
  DARKEST SKY : (m/asē)
20.24
19.49
20.06
20.31
20.03
20.15






20.31
  Date :
16th
4th
12th+
17th
6th
9th






4/17
  Time :
0305
0024
0219
0314
0156
0221






0314
   2020 :
19.95
20.11
20.23
20.05
20.15
20.19
20.51
20.30
20.18
20.43
20.07
20.12
20.51
  AVERAGE DAILY MAX DARKEST SKY : (m/asē)
18.96
18.90
19.52
19.35
19.65
19.60






 
   2020 :
19.0018.9619.4019.3919.6519.8220.2020.0319.7419.3819.5718.8519.50
 Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
YEAR
  2021
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.