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Otter Valley Weather Extremes (2005 - 2018) |
Otter Valley
weather extremes for 2018 and station records |
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2018 |
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Station
Record |
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Temperature highs |
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31.1°C |
8th July |
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31.1°C |
20th June 2017 |
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Temperature lows |
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-4.8°C |
28th February |
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-11.6°C |
26th December 2010 |
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Temperature lowest high |
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-1.7°C |
1st March |
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-1.4°C |
25th December 2010 |
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Temperature highest low |
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17.1°C |
4th August |
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19.2°C |
1st July 2015 |
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Warmest daily
mean |
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23.2°C |
2nd July |
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23.3°C |
19th July 2006 |
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Coldest daily
mean |
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-3.1°C |
1st March |
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-6.0°C |
19th December 2010 |
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Warmest monthly
mean |
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19.4°C |
July |
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20.1°C |
July 2006 |
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Coldest monthly mean |
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4.5°C |
February |
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0.7°C |
December 2010 |
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Warmest annual
mean |
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11.9°C |
2018 |
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12.1°C |
2014 |
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Coldest annual
mean |
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10.0°C |
2010 |
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Highest monthly
anomaly |
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+2.8°C |
December |
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+5.0°C |
December 2015 |
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Lowest
monthly anomaly |
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-1.6°C |
March |
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-5.6°C |
December 2010 |
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Grass temp lows |
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-8.3°C |
28th February |
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-10.8°C |
7th January 2010 |
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Rainfall in 15
minutes |
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4.6 mm |
9th
August |
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10.4 mm |
30th
October 2008 |
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Rainfall in 1 hour |
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10.4 mm |
1st July |
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24.1 mm |
12th June 2006 |
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Rainfall in 24 hours |
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26.4 mm |
12th
August |
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70.8 mm |
30th October 2008 |
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Rainfall in 1 month |
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179.3 mm |
March |
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188.9 mm |
November 2009 |
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Rainfall in 1 year |
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853 mm |
2018 |
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1370 mm |
2012 |
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Driest Month |
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0.0 mm |
June |
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0.0 mm |
June 2018 |
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Driest Year |
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-.- mm |
- |
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712 mm |
2011 |
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Max Sunshine in 1 day |
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15.4 Hours |
24th June |
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15.8 hours |
25th June 2010 |
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Max Sunshine in 1 week |
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107.2 Hours |
24th to 30th June |
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107.2 hours |
24th to 30th June 2018 |
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Max Sunshine in 1 month |
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285.2 Hours |
June |
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328.2 hours |
July 2013 |
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Max Sunshine in 1 year |
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1938 Hours |
2018 |
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2019 hours |
2010 |
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Dullest month |
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51.6 Hours |
December |
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49.1 Hours |
November 2015 |
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Dullest Year |
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- |
- |
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1681 Hours |
2011 |
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UV Index high |
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8.5 |
20th June |
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10.0 |
14th July 2014 |
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Solar irradiance high |
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1134 W/m² |
20th June |
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1320 W/m² |
4th May 2015 |
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Solar irradiance 1-hour
ave high |
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1023 W/m² |
25th May |
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-.- W/m² |
-.- |
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Solar energy mean day high |
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28.90 MJ/m² |
14th May |
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33.1 MJ/m² |
19th June 2012 |
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Solar energy mean day low |
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1.09 MJ/m² |
13th January |
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0.15 MJ/m² |
24th January 2014 |
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Wind high |
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74 mph |
29th November |
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74 mph |
29th November 2018 |
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Windiest day |
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373 miles |
12th October |
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405 miles |
6th February 2016 |
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Windiest month |
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3927 miles |
November |
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6632 miles |
December 2015 |
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Calmest day |
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8 miles |
10th December |
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1 mile |
11th December 2008 |
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Calmest month |
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1894 miles |
June |
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1293 miles |
September 2014 |
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Pressure highs |
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1039.5 hPa |
24th September |
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1043.9 hPa |
27th December 2016 |
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Pressure lows |
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981.9 hPa |
5th March |
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961.1 hPa |
10th March 2008 |
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Dewpoint
high |
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21.5°C |
3rd
August |
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21.8°C |
20th
June
2017 |
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Dewpoint
low |
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-12.8°C |
28th
February |
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-14.3°C |
26th
December 2010 |
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Relative
humidity low |
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33% |
22nd June |
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27% |
9th July 2013 |
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Soil moisture deficit6 |
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78 cb |
28th July |
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78 cb |
28th July 2018 |
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10 cm soil temp highs5 |
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23.3°C |
23rd July |
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23.3°C |
23rd July 2018 |
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10 cm soil temp lows |
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1.2°C |
1st March |
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1.2°C |
1st March 2018 |
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30 cm soil temp highs |
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21.1°C |
24th July |
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21.3°C |
27th July 2014 |
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30 cm soil temp lows |
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2.8°C |
3rd March |
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2.8°C |
3rd March 2018 |
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100 cm soil temp highs |
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18.3°C |
24th July |
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19.6°C |
30th July 2014 |
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100 cm soil temp lows |
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6.1°C |
10th March |
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4.0°C |
10th January 2009 |
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Highest
snow depth |
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26 cm |
19th March |
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28
cm |
20th
December 2010 |
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Longest
snow cover1 |
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2 days |
18th - 19th
March |
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10
days |
17th -
26th Dec 2010 |
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Least snow
days in a year2 |
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- |
- |
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0
days |
2007,11,12,14,15
& 16 |
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Most snow
days in a year2 |
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6 days |
2018 |
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7
days |
2010 |
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Sea
surface temp highs |
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21.2°C |
29th June |
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22.1°C |
19th June 2017 |
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Sea
surface temp lows |
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6.1°C |
1st March |
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5.4°C |
27th
December 2010 |
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Least frost
nights |
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- |
- |
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18 days |
2014 |
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Most frost
nights |
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39 days |
2018 |
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64 days |
2010 |
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Frostiest
night3 |
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24 hours |
1st March |
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24 hours |
25th December 2010 |
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Frostiest
month3 |
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113
hours |
February |
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373 hours |
December 2010 |
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Thunder
days in a month4 |
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3 Days |
November |
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6 days |
July 2014 |
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Thunder
days in a year4 |
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12 Days |
2018 |
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23 days |
2014 |
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Updated on the
31st December 2018. |
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Most records
go back to May 2005, which is when this station started
recording weather for the Otter Valley. Sea surface
temperature records are for Lyme Bay and date from early
2003. Sunshine recording was added late 2006 and started
collecting data in 2007. Soil and grass temperature readings
started in 2007. UV Index recording started in January 2011.
1Longest continuous snow cover of at least 50% of
the ground. 2Snow days are defined as snow seen
falling. 3Frostiest days are defined as the time
duration with temperatures below 0.0°C. 4Thunder
days are defined as days when thunder is heard. 5Soil
temperatures at 10 cm depth begin from the start of 2018.
6Soil moisture deficit is measured at 30 cm depth
and is in centibars (cb). Recording started September 2017.
For a description on the measurement of soil moisture the
click here. |
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