Climate Data and Brief Summary for Autumn 2004

Last updated 4th December 2004

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

SCREEN TEMPERATURES °c
                                        Anomaly*       Date
Mean                        9.7          +0.6
Mean Maximum               12.6          +0.4
Mean Minimum                6.7          +0.7
High Maximum               23.6                         5th September
Low Minimum                -2.0                        19th November
Low Maximum                 2.4                        20th November
High Minimum               15.0                         4th September
Low Grass                  -5.2                        19th November
Air Frosts                   6           -1
Ground Frosts               10          -10 
Hours of Frost             43.5

Barometric pressure, 24 hour observations (mbar)
Mean                      1013.6        +0.2		
Maximum                   1035.1                       14th November                               
Minimum                    987.6                       28th October

PRECIPITATION (mm)
Total                      245.0        +18.6                                          
Rain days (0.2mm or more)   60          +10                                            
Wet days (1.0mm or more)    43           +6 
Maximum Fall                21.8                       18th November
Rainfall duration (hrs.)   177.6
 
SUNSHINE

Sun Hours                  282.8        +27.5
Maximum day                 12.2                        7th September
Nil Sun Days                21

HUMIDITY %

Mean                        89.2
Dry days (60% or less)      17                                                  

WIND (mph)

24hour mean                  4.5
09.00 mean                   4.4
Maximum gust                41.0                       21st October 
%North                       2.7
%North East                  1.1
%East                        8.8
%South East                 12.1
%South                      12.6
%South West                 16.5
%West                       22.5
%North West                 19.2
%Calm                        4.5
Hours of calm              246.5

MISCELLANEOUS

Days with:

Sleet/Snow                   4           +2            
Snow lying (09.00)           2           +1
Maximum depth (cm)           0.2                          
Total snow depth (cm)        0.3			
Hail                         0           -2
Thunder                      1            0
Fog (09.00)                  2           -7

Brief summary of the month:
Autumn 2004 was the warmest since 2002. It was the dullest
since 2002 and the wettest since 2002.

All data taken at 220 metres above sea level


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