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Tuesday, 3 December 2013

November 2013 Weather Report

Frosted leaves in the garden
A quiet and pretty uneventful month which saw temperatures gradually fall away as one would expect during the course of a normal November in the northern hemisphere. Overall temperatures would conclude one degree centigrade below the 1971-2000 long term average with neither notable warmth or cold being hidden by these statistics. Indeed daytime temperatures merely fluctuated by just a few degrees during the month though night-time minima did vary somewhat more though again in winter this is to be expected. The month would also see both the first grass and air frosts of this winter season with a total of 11 grass frosts and 5 air frosts with a modest monthly minimum of just -1.6 C (29.1 F).

A colourful end to the day on the 23rd

Rainfall meanwhile was well below normal with less than half of the long term average, continuing the below average theme of 2013, with much of the rain during November being light and insignificant despite the fact that rainfall was recorded on 17 days. Indeed just 10 days would see rainfall in excess of 1 mm. As for the various precipitation varieties that one can expect in this world just rain & drizzle were recorded, with no thunder, hail or wintry precipitation to report. Fog was also absent which is surprising given November's foggy reputation !

Frosted windscreen

As for the various other weather variables recorded here sunshine was above average, continuing the theme for an increase in late autumn/early winter sunshine which has been a theme of the past decade, while wind speeds were generally moderate with no strong winds and certainly no gales to report (the maximum gust was a mere 33 knots). However worth noting is the dominance of westerly winds with every single day recording winds from a western quarter and 17 days recording a direct westerly. The lack of wind and rain is also reflected in the average barometric pressure of 1015.1 mbar with high pressure just about dominating the vast majority of the moth.

Tutsan (aka Hypericum) after a light shower of rain

STATISTICS
AVERAGE TEMPERATURE : 5.8 C / 42.4 F (1.0 C below average)
AVERAGE MAXIMUM : 9.1 C / 48.4 F (0.7 C below average)
AVERAGE MINIMUM : 2.5 C / 36.5 F (1.3 C below average)
HIGHEST MAXIMUM : 11.8 C / 53.2 F, 1st & 11th
LOWEST MAXIMUM : 5.3 C / 41.5 F, 19th
HIGHEST MINIMUM : 7.2 C / 45.0 F, 17th
LOWEST MINIMUM : -1.6 C / 29.1 F, 20th
AIR FROSTS : 5
FROST DURATION : 17 hours

TOTAL RAINFALL : 27.8 mm / 1.09 inches (46% of the average)
MAXIMUM TOTAL (09-09) : 7.2 mm / 0.28 inches, 1st
RAIN DAYS (=>0.2 mm) : 17
WET DAYS (=>1.0 mm) : 10
RAIN DURATION : 55 hours
DAYS WITH THUNDER : 0
DAYS WITH HAIL : 0
DAYS WITH SNOW FALLING : 0

TOTAL SUNSHINE : 89.0 hours (139% of the average)
AVERAGE PER DAY : 2.9 hours
SUNLESS DAYS : 5

AVERAGE WIND SPEED : 2.9 knots / 3.3 mph
MAXIMUM GUST : 33 knots / 38 mph, 2nd & 29th
WIND DIR. FREQUENCY : N 0, NE 0, E 0, SE 0, S 0, SW 5, W 17, NW 8

AVERAGE BAROMETRIC PRESSURE (at 0900) : 1015.1 mbar/hPa
MAXIMUM BAROMETRIC PRESSURE : 1039.6 mbar/hPa, 25th
MINIMUM BAROMETRIC PRESSURE : 983.0 mbar/hPa, 4th

AVERAGE GRASS MINIMUM : 1.0 C / 33.8 F
LOWEST GRASS MINIMUM : -3.9 C / 24.9 F, 26th
GRASS FROSTS : 11

DAYS WITH FOG : 0
DAYS WITH SNOW LYING : 0
MAXIMUM SNOW DEPTH : n/a
SNOW INDEX : 0 cm/days

ADDITIONAL MISCELLANY
- The past month was the both the 2nd coldest and 2nd driest November since our records began in 2003.
- Of the past 12 months 9 have concluded below average temperature wise, a trend which began to manifest itself in 2012 and one which currently shows no sign of reversing (possible connection with reduced solar output?)

November 2013 Logbook

November statistics and averages since 2003