SUMMARY OF CLIMATOLOGICAL READINGS FOR 2004

Location: Tawfield, (Wooden Hill), Great Hollands, in the SW part of Bracknell.

( NGR: SU 854 667; Lat=51o 23' 30" North: Long=00o 46' 28" West )
Altitude 80 m
(temperatures degC; rainfall/melted snowfall mm; snow depths cm)
Readings are taken at 0900 and 1800 UTC. Where the NIGHT maximum or DAY minimum are significantly different from figures hereunder, this will be noted in the accompanying text summary. There are now two mean daily temperatures shown: the first is the mean of the average day maximum and average night minimum (A), and the second is the average of the 24hr maximum and 24hr minimum (B .. as kept formerly) .. the anomalies are shown for this latter figure from 1971-2000 estimated Long Term Averages.

Data JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
High DAY maximum: 11.5 14.7 18.1 21.5 24.8 29.9 28.8 29.9 27.0 16.4 13.5 12.0 29.9
(dates): 31 04 31 24 19 08 29 08 05 02 03 30 8 Jun &
8 Aug
Low DAY maximum: 2.8 2.6 5.0 8.8 11.1 15.8 17.7 18.2 14.5 10.2 2.8 1.9 1.9
(dates): 03 28 10 29 04 23 11 29 25 16 20 13 13 Dec
Low NIGHT minimum: -2.7 -4.4 -5.1 0.6 3.4 5.8 8.5 9.2 5.1 5.1 -1.5 -3.2 -5.1
(dates): 03,29 27 01 09 23 19 06 31 25 08 14 20 1 Mar
High NIGHT minimum: 10.0 11.7 10.5 10.3 13.8 16.0 16.7 19.8 16.7 13.4 11.0 10.0 19.8
(dates): 11 05 16 27 29 05 30 09 07 24 07 23 9 Aug
Mean maximum:
(09-18UTC)
7.5 7.9 10.0 14.3 18.3 22.0 22.4 23.4 19.8 14.0 10.1 7.3 14.7
Mean minimum:
(18-09UTC)
3.5 3.5 3.5 5.5 8.6 11.8 12.3 14.2 11.7 8.5 6.0 3.3 7.7
Mean of (day max+ night min):
(A)
5.5 5.7 6.7 9.9 13.4 16.9 17.3 18.8 15.7 11.3 8.1 5.3 11.2
Mean 24hr & (anomaly)
(B)
5.4
(+1.2)
5.6
(+1.3)
6.7
(+0.0)
9.9
(+1.1)
13.4
(+1.0)
16.9
(+1.6)
17.3
(-0.3)
18.8
(+1.6)
15.7
(+1.5)
11.2
(+0.7)
7.9
(+1.0)
5.1
(-0.2)
11.1
(+0.8)
Lowest Grass Min: -4.5 -5.5 -6.1 -1.7 2.0 2.3 7.1 7.6 3.6 3.1 -3.1 -5.1 -6.1
days min<0.0: 08 09 04 00 00 00 00 00 00 00 02 08 31
(dates): 03-04,
17-19,
28-30
09,21,
23-29
01-03,
26
- - - - - - - 14-15 01-02,
11-12,
20,
26-28
-
days max>=21.0: 00 00 00 01 06 18 22 24 09 00 00 00 80
days max>=25.0: 00 00 00 00 00 06 06 09 02 00 00 00 23
days max>=30.0: 00 00 00 00 00 00 00 00 00 00 00 00 00
(dates): - - - - - - - - - - - - -
                           
Total rainfall etc: 87.5 27.7 47.5 83.5 52.0 25.9 39.0 67.1 27.3 124.8 41.0 49.4 672.7
(PPN anomaly) 133 % 63 % 91 % 161 % 90 % 47 % 87 % 124 % 41 % 166 % 62 % 71 % 95 %
Highest 24hr rainfall : 12.0 7.4 8.3 16.3 14.3 11.9 19.4 16.1 8.1 20.2 6.4 14.1 20.2
(dates): 07 01 11 27 03 22 07 09 12 20 17 18 20 Oct
days PPN >=0.2: 20 12 17 14 10 07 10 17 11 21 15 10 164
days PPN >=1.0: 16 07 11 13 10 05 06 12 08 16 10 06 120
days PPN >=10.0: 01 00 00 02 02 01 01 02 00 04 00 03 16
days PPN >=25.0: 00 00 00 00 00 00 00 00 00 00 00 00 00
days thunder heard: 01 00 00 02 01 01 02 04 00 02 00 00 13
days hail <0.5cm: 01 00 05 01 01 01 00 00 00 01 00 01 11
days hail >=0.5cm: 00 00 02 00 00 00 00 01 00 00 00 00 3
days snow/rain&snow: 01 04 05 00 00 00 00 00 00 00 01 01 12
days snow lying at 09UTC: 02 00 01 00 00 00 00 00 00 00 00 00 3
deepest snow cover (cm): 01 - 03 - - - - - - - - - 03cm
(dates): 29 - 12 - - - - - - - - - 12 Mar
fog at 09UTC: 00 00 01 00 00 00 00 00 00 00 00 01 2

Brief notes on individual months in 2004:
January: MAINLY MILD/DAMP/BREEZY: COLD-SNAP,SOME SNOW END MONTH. Click HERE for full report.
February: DRY OVERALL: WINDY/VERY MILD START; QUIET MID-MONTH, COLD END. Click HERE for full report & summary of winter season.
March: RATHER COLD FIRST HALF; LESS COLD BUT SHOWERY THEREAFTER. Click HERE for full report.
April: SHOWERY START; WET SPELL MID-MONTH, HEAVY RAIN END. MILD. Click HERE for full report.
May: UNSETTLED/COOL START. DRY/WARMER BY MID-MONTH: SHOWERY END. Click HERE for full report.
June: FINE/WARM & VERY DRY FIRST HALF. UNSETTLED/COOLER FROM 17TH. Click HERE for full report.
July: CYCLONIC/COOL UNTIL 12TH THEN WARM & LARGELY DRY: HOT FINISH. Click HERE for full report.
August: WARM OVERALL: ABOVE AVERAGE (BUT IRREGULAR) RAINFALL. Click HERE for full report.
September: DRY/MILD OVERALL: FINE/VERY WARM FIRST-THIRD, THEN UNSETTLED. Click HERE for full report.
October: UNSETTLED/CYCLONIC: FREQUENT RAINFALL. ABOVE-AVERAGE TEMPERATURES. Click HERE for full report.
November: MILD/DRY OVERALL. DAMP START & END: COLDER AROUND MID-MONTH. Click HERE for full report.
December: NOTABLY DRY TO MID-MONTH; UNSETTLED/COLDER THEREAFTER. Click HERE for full report.