Page updated January 4, 2019 11:07
Link to November 2018..Link to January 2019

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Swanston Weather Station
December 2018 (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
999.6
4.7
85
5
SSW
5.0
P1600'
7.1
2.7
0.3
1.0
0.00
100
0.5
30
Turning mild pm 30th,shwrs with some sn. Dry am 1st
1
2
990.1
3.6
98
2
ESE
6.0
7.8
3.6
5.6
2.6
0.00
98
0.1
25
Overcast, low cloud 1st. Fog am 2nd
2
3
993.7
3.7
92
7
WNW
6.0
6.1
3.6
0.2
1.6
4.94
163
0.3
30
Dull,low cloud 2nd. Much clearer am 3rd
3
4
1016.7
3.8
89
7
WSW
5.0
5.1
1.8
0.1
– 1.0
1.64
146
0.5
23
Sunny periods 3rd. Clear then cloudy am 4th
4
5
1014.8
1.2
92
3
SE
4.0
9.7
0.2
6.8
– 3.1
0.00
37
0.0
15
Sunny intervals am 4th. Frost am 5th, turning cloudy
5
6
1000.8
9.7
93
22
SW
5.0
11.6
1.2
3.3
2.3
1.01
207
0.6
41

Light rasn am 5th, then rain. Cloudy am 6th.Milder

6
7
988.0
6.0
83
21
WSW
5.5
8.0
5.6
2.6
3.9
3.54
155
0.9
47
A few sunny intervals 6th. Rain am 7th
7
8
989.4
7.6
84
20
WNW
6.0
8.2
5.0
0.4
4.2
1.91
220
0.8
40
Sunny 7th then squally rain 1600 onwards. Fine am 8th
8
9
1004.8
3.6
85
9
W
5.0
6.6
3.4
0.0
1.5
2.51
207
0.6
18
Turning colder pm 8th. Clear am 9th
9
10
1024.9
2.6
89
3
WNW
5.0
6.2
2.6
0.0
– 0.5
4.37
204
0.3
15
Sunny intervals 9th, clear am 10th
10
11
1022.2
6.4
92
4
W
5.0
7.7
3.4
0.0
– 2.0
0.00
56
0.2
22
Sunny periods 10th. Clear then cloudy overnight to 11th
11
12
1019.3
4.8
92
10
SE
5.0
6.5
4.8
0.0
3.8
0.31
130
0.5
32
Cloudy 11th and am 12th
12
13
1018.1
3.0
75
15
SE
4.5
3.4
2.4
0.0
– 0.2
0.09
58
1.2
35
Wave cloud 12th. Cloudy am 13th
13
14
1021.7
– 0.4
87
2
S
4.0
3.7
– 0.5
0.0
– 4.8
4.88
148
0.9
43
Overcast 13th. Clear skies overnight 13th/14th.1.7h<0C
14
15
1009.5
1.3
77
18
SSE
3.5
4.9
– 0.5
6.0
– 0.5
0.00
54
0.9
43
Sunny periods 14th. Cloudy 15th, snowgrain.1.3h<0C (am 14th)
15
16
997.6
4.4
90
3
WSW
3.5
P1300',L1000'
6.7
0.4
1.5
– 0.5
4.97
193
0.6
39
Snowgrain then rain turning to snow eve'g 15th. Clear 16th
16
17
1009.8
3.7
90
2
WSW
3.5
L1000'
9.8
2.9
0.0
– 1.1
3.12
160
0.5
34
Sunny periods 16th. rain eve'g. Clear am 17th
17
18
995.7
9.6
88
12
SE
5.0
9.8
3.7
2.7
5.0
0.00
58
0.7
37
Sunny intervals 17th. Cloudy and much milder am 19th
18
19
996.9
5.5
87
7
SSW
4.5
7.9
4.8
0.7
2.2
4.66
153
0.7
30
Cloudy 18th, rain 1030-1500h. Clearer overnight to 19th
19
20
996.4
5.2
92
5
SW
5.0
6.7
3.5
0.8
– 0.5
0.02
84
0.4
26
Sunny periods 19th. Cloudy later, showers. Cloudy am 20th
20
21
993.6
5.4
90
7
W
5.0
6.9
5.2
1.0
3.0
0.07
90
0.6
25
Cloudy 20th and am 21st
21
22
1005.6
6.6
95
10
W
5.0
7.8
5.4
0.1
3.5
2.10
195
0.6
26
Cloudy 21st, light rain evening. Mainly cloudy am 22nd
22
23
1015.1
4.2
96
3
WNW
4.0
5.6
3.0
0.0
– 0.9
0.00
83
0.2
22
Sunny intervals 22nd. Broken cloud am 23rd
23
24
1031.5
1.8
90
2
NW
4.0
5.2
– 0.1
0.0
– 4.1
5.20
156
0.3
15
Cloudy 23rd. Clear skies overnight 23rd/24th.0.3h<0C
24
25
1029.3
3.3
97
2
NW
3.0
10.3
– 0.5
0.1
– 4.6
0.00
65
0.3
25
Prolonged sunshine 24th. Clear skies am 25th. 1.9h<0C
25
26
1023.9
9.9
88
7
NNW
5.0
10.9
3.3
0.0
6.8
0.15
79
0.7
31
Misty. Turning milder 25th to 26th
26
27
1023.0
9.3
81
13
WSW
5.0
9.9
7.7
0.0
5.0
2.39
121
0.7
26
Cloudy 26th. Broken cloud am 27th
27
28
1022.3
9.2
89
16
WSW
6.0
11.7
8.4
2.1
6.9
2.95
227
0.8
39
Sunny intervals 27th. Cloudy am 28th
28
29
1018.5
9.7
87
20
W
6.0
10.3
6.4
0.4
5.4
4.04
149
1.0
41
Sunny intervals 28th. Wet and windy early am 29th
29
30
1028.1
9.9
91
16
W
6.0
10.3
5.8
0.1
5.5
0.00
77
0.7
34
Sunny periods 29th. Rainlate pm. Cloudy am 30th
30
31
1027.8
8.9
86
18
W
6.0
10.3
8.3
0.0
6.5
1.94
137
0.9
137
Cloudy and dull 30th and am 31st
31
Total/
Mean
7.8
3.5
34.8
– 4.8
56.81
220
18.0
47
 
Date
 
Pressure
(mb)
Temp
(°C)
Relative
Humidity
(%)
Wind
Speed (mph)
Wind
Direction
Soil Temp
at 20cm
(°C)
Snow Depth(cm)
or
Pentlands Snow line(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)
 
  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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