January 2010

A lovely and warm January day on the beach at Salcombe Regis, a welcome relief after the bitter weather experienced in December.
A lovely and warm January day on the beach at Salcombe Regis with just light winds and strong sunshine. A welcome relief after the bitter weather experienced in December.

Summary for  January 2011
Mean Max: 7.0C (-1.4C)
Mean Min: 2.1C (-0.6C)
Mean: 4.6C (-1.0C)
     
High Max: 12.9C 13th
Low Max: 0.7C 29th
High Min: 11.9C 13th
Low Min: -6.7C 31st
Mean Grass Min: -1.4C  
Grass Min: -9.5C 21st
     
Rain Total (gauge): 92.3 mm (106%)
Rain Total (tipping bucket): 93.8 mm (107%)
Rain Days >0.2 mm: 15 Days  
Rain Days >1.0 mm: 14 Days  
Max 24 hrs: 15.4 mm 17th
Days without any rain: 16  
     
Air Frost: 11 Days  
Ground Frost: 20 Days  
Snow Falling: 0 Days  
Snow (50%) @ 9am: 0 Days  
Thunder Heard: 0 Days  
Hail <5 mm: 0 Days  
Hail >5 mm: 0 Days  
Fog @ 9am: 0 Days  
     
Total Monthly Sunshine: 70h:11m  
Total Monthly Sunshine: 70.2 Hours  
Most Sunshine in a Day: 08h:30m 30th
Average Daily Sunshine: 02h:15m  
Sunless Days: 10 Days  
Cloudless Days: 6 Days  
Total Possible Sunshine: 264h:35m  
Percentage of Total Sun: 27%  
     
Mean Soil Temp @ 30 cm: 4.8C  
Min Soil Temp @ 30 cm: 2.5C 1st
Max Soil Temp @ 30 cm: 7.6C 16th
Mean Soil Temp @ 100 cm: 5.9C  
Min Soil Temp @ 100 cm: 5.1C 1st
Max Soil Temp @ 100 cm: 7.2C 19th
     
Mean 10 Min Wind >39 mph: 0.00 Days  
N: 7.47 Days  
NE: 4.27 Days  
E: 1.32 Days  
SE: 3.95 Days  
S: 4.56 Days  
SW: 1.53 Days  
W: 3.58 Days  
NW: 2.70 Days  
Calm: 1.61 Days  
Mean Wind: 4.6 mph  
Max Gust: 37 mph 8th
     
Mean Cloud Cover: 80%  
Mean RH @ 9am: 87%  
Rain Duration >0.1mm/hour: 59.0 Hours  
Frost Duration: 144.0 Hours  
Max Frost Duration in a Day: 19.5 Hours 29th
     
Mean Sea Temperature: 7.3C  
Normal for Month:    
Max Sea Temperature: 8.3C 16th
Min Sea Temperature: 6.2C 1st
     
Mean Pressure @ 9am: 1018.2 hPa (+2.9 hPa)
Mean Pressure: 1018.2 hPa (+2.9 hPa)
Max Pressure: 1040.2 hPa 21st
Min Pressure: 985.3 hPa 8th
     
Max Dewpoint: 10.8C 13th
Min Dewpoint: -9.3C 31st
Mean Dewpoint: 1.4C  
     
Max Humidity: 100% 12th
Min Humidity: 65% 24th
Mean Humidity: 84% (-2)

 

After the coldest December since 1890, relative normality returned to Devon in January.

Temperatures struggled for the first week but then climbed dramatically giving a warm spell of weather from the 7th to the 17th. The period from the 12th to the 16th was the warmest spell of January weather since January 2008 with temperatures staying continuously above 10C for over 60 hours. Things then cooled down a little with a short cold spell to end the month.

Precipitation was slightly above average.
Frosts were quite frequent though generally slight but there was one severe frost on the 31st with a minimum of -6.7C. Snow was not seen falling or lying at any point throughout the month.
Sunshine was disappointing for the first half of the month with a record amount of January 'dull days', things recovered somewhat for the 2nd half and overall the month ended up with around average sunshine amounts.
Soil temperatures were well below normal at the beginning but ended up near-normal at the end.
Winds were dominant from a northerly and north-easterly direction.
Rainfall duration was only 59 hours and cloud amounts were record-breakingly high.
Sea temperatures gradually recovered from near-record lows at the beginning of the month after an extremely cold December, even so they still ended up below normal at the end of the month.
Mean pressure was rather higher than the average for January.
Dewpoints were below average.
The RH ended up being a little below normal.
Weather Data for Otter Valley, Devon.  January 2011  
  Temp (oC) Hum (RH%) Dewpoint (oC) Wind (mph) Rain Pressure (hPa) Grass Sun  
  Min Max Ave Min Max Ave Min Max Ave Max Ave Run mm Min Max Ave Min Hours Observations
1 3.6 5.9 4.8 83 88 86 0.6 3.1 1.9 10 1.1 26 0.0 1025 1026 1025 2.5 0.0 Cloudy all day
2 2.4 4.8 3.6 78 90 84 -1.6 2.6 0.5 14 2.6 64 1.9 1025 1028 1027 0.9 0.0 Cloudy all day
3 1.6 3.6 2.6 77 89 83 -2.1 0.8 -0.7 17 4.4 106 5.8 1019 1028 1023 0.7 0.0 Cloudy am, light rain pm
4 -0.8 5.7 2.5 88 91 90 -2.9 3.6 0.4 14 2.5 61 0.0 1008 1019 1013 -2.1 0.3 Brief sunny intervals all day
5 4.8 7.4 6.1 85 92 89 0.2 5.8 3.0 26 6.0 144 2.2 994 1008 1001 0.5 0.0 Cloudy am, int rain pm
6 4.1 4.9 4.5 90 92 91 0.2 3.2 1.7 14 2.0 49 10.6 992 999 996 -1.8 0.0 Rain intermittent all day
7 2.4 10.1 6.3 90 93 92 -0.6 8.5 4.0 23 5.0 121 10.3 994 1000 997 2.6 0.4 Rain intermittent all day
8 5.2 9.4 7.3 71 93 82 -2.2 7.7 2.8 37 7.9 189 6.2 985 1005 995 -4.0 4.7 Sunny intervals all day
9 -1.7 7.1 2.7 79 92 86 -3.9 3.9 0.0 14 1.6 40 0.0 1005 1017 1011 -5.3 7.1 Sunny all day
10 -2.1 8.5 3.2 84 92 88 -4.6 6.7 1.1 35 8.8 210 10.3 999 1017 1008 -5.8 0.0 Brief sunny ints am, rain pm
11 5.2 8.8 7.0 71 93 82 0.5 7.2 3.9 36 7.9 189 7.0 996 1017 1006 -0.1 4.9 Cloudy early am, then sunny
12 5.5 12.3 8.9 86 94 90 1.5 10.5 6.0 19 4.0 97 12.2 1010 1016 1013 3.0 0.0 Rain, intermittent all day
13 11.9 12.9 12.4 89 93 91 9.6 10.8 10.2 23 5.4 130 1.9 1009 1011 1010 10.1 0.2 Light rain am, cloudy pm
14 10.9 11.9 11.4 77 91 84 4.8 9.8 7.3 24 7.2 172 0.0 1007 1014 1011 7.0 2.0 Cloudy am, sunny ints pm
15 7.3 11.9 9.6 79 91 85 3.7 8.2 6.0 36 8.6 208 0.0 1013 1015 1014 2.6 0.6 Brief sunny intervals all day
16 10.7 11.8 11.3 80 91 86 6.9 9.5 8.2 27 7.9 190 5.8 1013 1017 1015 4.2 0.0 Cloudy am, rain pm
17 7.1 8.9 8.0 90 92 91 4.7 7.2 6.0 12 2.0 49 15.4 1015 1018 1017 3.5 0.0 Rain intermittent all day
18 0.6 8.3 4.5 72 92 82 -3.0 4.9 1.0 20 3.7 90 2.2 1018 1033 1025 -1.5 7.3 Sunny all day
19 -3.9 6.7 1.4 82 92 87 -6.2 4.3 -1.0 8 0.7 18 0.0 1033 1036 1035 -6.9 8.1 Sunny all day
20 -2.5 6.2 1.9 73 92 83 -4.6 2.6 -1.0 10 1.5 40 0.0 1035 1038 1036 -6.4 8.1 Sunny all day
21 -5.1 3.0 -1.1 78 90 84 -7.2 -0.4 -3.8 15 2.3 56 0.0 1038 1040 1039 -7.9 8.0 Sunny all day
22 -3.6 4.2 0.3 79 90 85 -6.0 0.9 -2.6 16 3.6 86 0.0 1036 1040 1038 -7.1 1.9 Sunny intervals all day
23 3.7 6.8 5.3 80 88 84 0.5 3.3 1.9 21 6.4 155 0.0 1034 1036 1035 -1.2 1.7 Sunny intervals all day
24 2.1 7.7 4.9 65 89 77 -0.2 3.1 1.5 14 3.6 78 0.0 1029 1035 1032 -2.3 1.0 Sunny intervals all day
25 2.7 8.2 5.5 81 91 86 0.2 5.7 3.0 19 4.8 114 1.2 1013 1029 1021 -2.3 0.7 Sunny ints am, drizzle pm
26 5.9 8.1 7.0 74 91 83 0.9 5.0 3.0 28 6.1 146 1.0 1009 1013 1011 -1.2 0.0 Brief sunny intervals all day
27 0.3 4.3 2.3 69 81 75 -4.3 0.6 -1.9 25 8.1 195 0.0 1013 1022 1018 -2.9 0.7 Brief sunny intervals all day
28 -0.5 1.8 0.7 65 78 72 -6.1 -2.9 -4.5 22 6.8 164 0.0 1021 1024 1022 -2.1 0.6 Brief sunny intervals all day
29 -2.5 0.7 -0.9 74 81 78 -6.2 -3.3 -4.8 19 5.1 123 0.0 1021 1023 1022 -6.4 0.4 Brief sunny intervals all day
30 -3.4 4.5 0.6 66 85 76 -6.0 -1.2 -3.6 17 4.5 108 0.0 1021 1024 1023 -3.7 8.5 Sunny all day
31 -6.7 2.0 -2.4 83 90 87 -9.3 -0.4 -4.9 9 0.7 18 0.0 1024 1028 1026 -9.5 2.9 Cloudy am, sunny pm
2.1 7.0 4.6 79 90 84 -1.4 4.2 1.5 20 4.6 3429 93.8 1015 1022 1018 -1.4 70.2  

Graphs for January 2011

Figure 1. Temperature and Rainfall for January 2011.
Figure 2. Sunshine, air pressure and mean wind speed for January 2011.
Figure 3. Wind direction for January 2011.
Figure 4. Soil & sea surface temperature (SST) for Lyme Bay for January 2011.
Figure 5. Wind run, maximum gusts and mean pressure for January 2011.