Climate Data and Brief Summary for Autumn 2007

Last updated 11th December 2007

*Anomalies are based on averages for the period 1971-2000

SCREEN TEMPERATURES °c
                                        Anomaly*       Date
Mean                        9.7          +0.5		
Mean Maximum               12.7          +0.5		
Mean Minimum                6.6          +0.5		
High Maximum               21.4                         6th September
Low Minimum                -3.1                        24th November
Low Maximum                 3.2                        18th November
High Minimum               14.6                         6th September
Low Grass                  -7.5                        24th November
Air Frosts                   6           -1
Ground Frosts               19           -1 
Hours of Frost             42.5

Barometric pressure, 24 hour observations (mbar)
Mean                      1019.7         +6.2		
Maximum                   1034.9                       19th October                               
Minimum                    995.3                       18th November

PRECIPITATION (mm)
Total                      189.6        -39.5                                          
Rain days (0.2mm or more)   50           -2                                            
Wet days (1.0mm or more)    33           -4 
Maximum Fall                22.0                       18th November
Rainfall duration (hrs.)   105.0
 
SUNSHINE

Sun Hours                  276.6        +21.3
Maximum day                 12.5                       22nd September
Nil Sun Days                15

HUMIDITY %

Mean                        89.8
Dry days (60% or less)      15                                                  

WIND (mph)

24hour mean                  3.9
09.00 mean                   4.3
Maximum gust                32.0                        8th November 
%North                      14.8
%North East                  2.2
%East                        9.7
%South East                  7.5
%South                       7.1
%South West                 15.5
%West                       13.3
%North West                 25.5
%Calm                        4.4
Hours of calm              254.0

MISCELLANEOUS

Days with:

Sleet/Snow                   2            0            
Snow lying (09.00)           1            0
Maximum depth (cm)           2.0 			18th November			                         
Total snow depth (cm)        3.0			
Hail                         0           -2
Thunder                      0           -1
Fog (09.00)                  3           -6

Brief summary of the month:
Autumn 2007 was the coolest since 2003. 
It was also the driest since 2003 and the
dullest since 2001.

All data taken at 220 metres above sea level


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