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Swanston Weather Station
December 2020 (Means and totals to date are at foot of table)
 
  0900 GMT readings
 Daily  Readings (See notes at foot of page)
Weather in previous 24h & hours of air frost (to 0900 on date)
Date
Date
Pressure
(mb)
Temp (°C)
Relative
Humidity (%)
Wind Speed (mph)
Wind Direction
SoilTemp @ 20cm
(°C)
SnowDepth(cm) or
Pentlands, Lammermuirs, Moorfoots snowline(ft)
1Maximum Temp (°C)
2Minimum Temp (°C)
3Rainfall
(mm)
4Grass Min Temp
(°C)
5Sun (Hours)

Solar
Rad'n High
(W/m2)
7ET
(mm)
6Max Wind
Speed (mph)
1
1027.1
4.7
78
0
WNW
6.0
8.4
2.8
0.2
0.1
0.29
195
0.33
22
 Sunny intervals 30th November. Clear skies am 1st December
1
2
1014.3
5.4
88
4
SW
6.0
6.5
4.7
15.7
3.6
3.84
197
0.53
29
 Overcast 1st, clearer skies am 2nd
2
3
988.2
1.1
91
1
SSW
Buried
3 cm snow
2.7
0.3
15.8
– 0.5
0.16
169
0.15
22
 Rain then rain/snow showers pm 2nd. Snow showers early am 3rd. 3 cm snow at 0900 GMT
3
4
978.5
2.4
97
0
NNE
Buried
10 cm snow
6.2
– 0.9
28.5
– 1.5
0.00
46
0.05
40
 Overcast 3rd. Heavy snow am 4th(thundersnow reported ). 10cm at 0900, 7.9hrs air frost.
4
5
997.5
3.7
95
1
N
4.5
P 1000'
5.6
2.3
7.0
– 1.0
0.00
121
0.08
20
 Rain pm 4th, turning less cold. Rain am 5th with thunder @0116 GMT
5
6
1004.3
3.4
93
1
NNW
4.5
P 1200'
5.1
2.6
0.4
– 0.9
4.26
158
0.18
9
 Rain and showers 5th, clearing later. Clear am 6th
6
7
1001.0
2.2
94
1
WNW
4.0
Patches 1200'
4.1
1.8
15.1
– 1.2
0.38
123
0.23
26
 Sunny periods 6th, clear skies later. Showers am 7th
7
8
993.6
4.1
94
3
WSW
4.0
P 1500'
6.1
2.1
0.7
– 1.1
0.00
104
0.23
21
 Overcast 7th. Rain, with some wet snow, late 7th and am 8th
8
9
1002.7
5.2
92
3
WSW
5.0
Patches 1500'
5.8
4.1
0.1
3.8
0.00
91
0.18
20
 Overcast 8th and 9th, occasional showers
9
10
997.0
4.1
91
1
SE
5.0
Patches 1500'
5.8
2.5
7.5
1.0
0.00
56
0.08
17
 Overcast 9th and 10th
10
11
983.2
4.8
95
3
SE
5.0
6.9
4.1
0.6
4.2
0.91
123
0.10
26
 Overcast 10th, heavy rain later. Rain am 11th
11
12
995.7
5.7
96
1
W
5.5
6.6
4.8
1.6
4.0
0.00
74
0.08
8
Mainly overcast 11th, rain late pm. Rain am 12th
12
13
996.9
4.2
90
2
SSE
5.0
8.9
2.7
11.6
– 0.1
0.00
42
0.10
33
 Rain am 12th, overcast pm. Clear early am 13th, turning cloudy
13
14
984.1
7.8
87
8
S
6.0
8.4
3.9
0.4
5.9
0.14
86
0.61
35
 Showers, with hail, 13th. Turning milder. Showers am 14th
14
15
996.4
6.3
89
6
SSE
5.5
7.8
6.3
0.7
4.0
2.87
153
0.56
36
 Mainly overcast 14th, occasional showers. A few clear spells am 15th
15
16
996.0
6.7
91
6
SSE
5.0
9.4
5.2
0.4
3.8
0.00
88
0.61
46
 Sunny intervals 15th, showers late afternnon/early evening. Overcast 16th
16
17
1002.8
6.7
87
8
SW
5.0
10.7
5.9
1.4
4.1
1.38
135
0.71
48
 Overcast 16th, gusty winds pm, showers evening. Overcast am 17th
17
18
997.7
9.9
86
10
S
6.0
12.9
6.7
6.5
6.0
0.00
81
0.64
47
 Heavy showers and gusty winds evening of 17th. Overcast am 18th. Milder overnight
18
19
991.7
8.1
87
6
S
6.5
9.2
7.4
3.3
6.2
2.64
186
0.66
43
 Overcast and mild 18th, heavy showers late pm 18th and early am 19th
19
20
1000.1
6.3
84
6
SSW
6.0
7.2
3.8
0.2
3.0
1.23
141
0.66
35
 Sunny intervals 19th, heavy showers evening. Variable cloud amount am 20th
20
21
1003.0
5.3
84
6
SSE
5.0
6.2
4.4
1.1
2.9
0.00
56
0.41
36
 A few sunny intervals 20th, light showers evening. Overcast am 21st
21
22
1007.6
4.2
88
4
SW
5.0
6.0
2.9
0.0
1.0
4.60
135
0.36
25
 Overcast 21st, rain late afternoon, broken cloud in evening. Clear skies am 22nd
22
23
1013.0
3.9
90
2
NNE
5.0
4.2
1.8
0.0
– 0.7
0.00
56
0.20
20
 Prolonged sunshine 22nd.Clear skies late 22nd and early 23rd, becoming overcast
23
24
1028.1
0.9
78
2
WNW
4.0
2.7
0.4
0.0
– 1.7
2.74
151
0.53
16
 Overcast 23rd. Clear skies overnight 23rd/24th
24
25
1029.6
2.7
83
4
SW
3.5
6.9
– 0.1
0.0
– 2.8
0.05
120
0.51
35
 Sunny intervals 24th. Clear skies and frost overnight with increasing cloud am 25th
25
26
1004.5
6.0
88
12
SSW
4.0
6.3
2.6
7.0
4.0
0.00
42
0.69
51
 Overcast 25th. Stormy overnight with gusts to 51mph am 26th
26
27
963.7
1.6
88
10
SW
3.5
PML 800'
3.9
0.8
0.5
– 0.6
2.92
132
0.33
30
 Wet and windy 26th, 51mph gust 1038 GMT. Rain and snow showers early am 27th
27
28
976.4
– 0.3
93
1
NW
3.0
1.0 cm snow
1.3
– 1.5
7.2
– 4.8
0.70
84
0.10
11
 Sunny intervals 27th, snow shower in evening. Frost overnight 27th/28th, 12.0hrs.
28
29
992.6
1.1
90
2
W
Buried
7.0 cm snow
2.8
-0.1
0.1
– 1.0
2.28
241
0.18
15
Mainly overcast 28th. Moderate snow showers late 28th/early am 29th
29
30
1000.6
-1.2
83
1
WSW
Buried
5.0 cm snow
1.3
-1.3
1.5
-3.7
5.23
199
0.18
20
Sunny intervals 29th. Snow flurry early am 30th then clear skies and air frost
30
31
1003.5
0.6
87
2
W
Buried
6.0 cm snow
3.2
-1.7
4.1
-6.1
0.00
56
0.00
14
Sunny periods 30th. Air frost, then snow, am 31st
31
 
Total/
Mean
6.1
2.6
 139.2
-6.1
36.64
241
10.7
51
  
Date
 
Pressure
(mb)
Temp
(°C)
Relative
Humidity
(%)
Wind Speed (mph)
Wind
Direction
Soil Temp
at 20cm
(°C)
SnowDepth(cm) or
Pentlands, Lammermuirs, Moorfoots snowline(ft)
1 Mean Maximum
Temp
(°C)
2Mean Minimum
Temp
(°C)
3Total Rainfall
(mm)
4Grass Min
Temp
lowest
(°C)
5Total Sun
(Hours)
Solar
Rad'n highest
W/m2
7Total ET
(mm)
6Max
Wind Speed
(mph)

December 2020 summary (to 0900 GMT on the 1st January)

Overall mean temperature 4.4C ( + 0.5 degC of normal)

Precipitation 139.2 mm (174.0%), Sunshine 36.64 hours (73.3%)
 
  0900 GMTreadings
Daily Readings (see notes below)  
    

 

Notes
1. For the 24 hours from 0900UTC* on the date to 0900UTC* on the following day. (The maximum temperature is generally in the afternoon*)
2. For the 24 hours ending at 0900UTC* on the date. (The minimum temperature is generally just after sunrise*)
*Where a maximum is overnight or minimum is during the day the figure is shown in italics. This often occurs in winter
3. For the 24 hours from 0900UTC* on the date to 0900UTC* on following day. SEPA = Scottish Environmental Protection Agency/UKMO 5" diameter gauge
4. For the period from sunset on previous day to 0900UTC* on the date
5.For the period sunrise to sunset on the date
6. For the period 0000UTC*–2400UTC* on the date i.e the Calendar Day
7. Total evapotranspiration on the date (in mm).
* UTC is Universal Time Coordinated. It has been adopted by the UK Met.Office in place of Greenwich Mean Time (GMT). When British Summer Time is in force UTC is BST minus one hour ,e.g.1000BST=0900UTC

 

 

 

 

 


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