SUMMARY OF CLIMATOLOGICAL READINGS FOR 2005
THERE WAS A BREAK IN LOCAL (TEMPERATURE) RECORDING FROM OCTOBER 1ST TO LATTER PART OF NOVEMBER - WHERE POSSIBLE, FIGURES HAVE BEEN ESTIMATED USING CLIVE TEMPERTON'S SITE IN ROMAN WOOD.
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: | 13.3 | 12.3 | 19.3 | 21.4 | 30.2 | 31.8 | 30.6 | 29.0 | 27.5 | (21.1) | (16.6) | 11.6 | 31.8 |
| (dates): | 07 | 12 | 19 | 30 | 27 | 19 | 13 | 31 | 04 | 11 | 02 | 16 | 19th Jun. |
| Low DAY maximum: | 3.8 | 2.0 | 3.2 | 6.9 | 11.6 | 16.0 | 15.1 | 16.3 | 15.1 | - | - | -0.7 | -0.7 |
| (dates): | 26 | 24 | 02 | 08 | 04 | 01 | 27 | 24 | 29 | - | - | 29 | 29th Dec. |
| Low NIGHT minimum: | -0.5 | -6.4 | -4.1 | -1.4 | 0.8 | 3.5 | 8.6 | 8.6 | 3.5 | (5.1) | (-3.1) | -4.7 | -6.4 |
| (dates): | 26 | 28 | 04 | 09 | 11 | 07 | 05 | 07,08 | 17 | 03 | 18,20 | 18 | 28 Feb. |
| High NIGHT minimum: | 11.0 | 10.5 | 11.7 | 12.9 | 14.8 | 19.0 | 16.9 | 15.3 | 17.6 | - | - | 7.7 | 19.0 |
| (dates): | 10 | 12 | 22 | 30 | 26 | 20 | 11,14 | 31 | 05 | - | - | 23 | 20 Jun. |
| Mean maximum: (09-18UTC) |
8.5 | 6.6 | 11.0 | 14.2 | 17.3 | 22.1 | 22.7 | 22.5 | 20.3 | - | - | 6.7 | - |
| Mean minimum: (18-09UTC) |
4.3 | 2.3 | 4.5 | 5.8 | 7.8 | 12.1 | 13.3 | 11.8 | 12.0 | - | - | 2.3 | - |
| Mean of (day max+ night min): (A) |
6.4 | 4.5 | 7.7 | 10.0 | 12.5 | 17.1 | 18.0 | 17.1 | 16.1 | - | - | 4.5 | - |
| Mean 24hr & (anomaly) (B) |
6.1 (+1.9) |
4.3 (0.0) |
7.5 (+0.8) |
9.9 (+1.1) |
12.5 (+0.1) |
17.1 (+1.8) |
18.1 (+0.5) |
17.1 (-0.1) |
16.1 (+1.9) |
(13.9) (+3.4) |
(6.1) (-0.8) |
4.2 (-1.1) |
11.1 (+0.8) |
| Lowest Grass Min: | -3.1 | -7.6 | -6.5 | -3.5 | -1.8 | 0.9 | 7.4 | 6.9 | 1.9 | - | (-4.5) | -6.0 | -7.6 |
| days air min<0.0: | 01 | 08 | 07 | 01 | 00 | 00 | 00 | 00 | 00 | 00 | (11) | 13 | 41 |
| (dates): | 26 | 17,20-21, 23, 25-28 |
01, 03-07, 13 |
09 | - | - | - | - | - | - | 14,17-22, 25-26, 29-30 |
07, 10-12, 17-20, 26-30 |
- |
| days max>=21.0: | 00 | 00 | 00 | 01 | 04 | 14 | 19 | 22 | 14 | 01 | 00 | 00 | 75 |
| days max>=25.0: | 00 | 00 | 00 | 00 | 01 | 09 | 08 | 07 | 02 | 00 | 00 | 00 | 27 |
| days max>=30.0: | 00 | 00 | 00 | 00 | 01 | 02 | 02 | 00 | 00 | 00 | 00 | 00 | 05 |
| (dates): | - | - | - | - | 27 | 19,23 | 13,14 | - | - | - | - | - | - |
| Total rainfall etc: | 26.6 | 22.3 | 48.4 | 57.9 | 20.4 | 29.9 | 50.3 | 61.2 | 47.0 | 83.8 | 61.4 | 61.2 | 570.4 |
| (PPN anomaly) | 40 % | 51 % | 93 % | 111 % | 35 % | 54 % | 112 % | 113 % | 67 % | 112 % | 93 % | 87 % | 81 % |
| Highest 24hr rainfall : | 5.5 | 5.2 | 19.5 | 16.2 | 8.2 | 9.3 | 12.0 | 10.9 | 15.7 | 19.3 | 28.4 | 27.0 | 28.4 |
| (dates): | 10 | 24 | 29 | 24 | 21 | 03 | 24 | 22 | 04 | 24 | 02 | 01 | 2nd Nov. |
| days PPN >=0.2: | 13 | 13 | 12 | 18 | 10 | 11 | 12 | 10 | 11 | 15 | 15 | 11 | 151 |
| days PPN >=1.0: | 10 | 07 | 09 | 08 | 06 | 06 | 10 | 10 | 08 | 12 | 09 | 07 | 102 |
| days PPN >=10.0: | 00 | 00 | 01 | 01 | 00 | 00 | 01 | 02 | 01 | 02 | 01 | 02 | 11 |
| days PPN >=25.0: | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 01 | 01 | 02 |
| days thunder heard: | 00 | 00 | 00 | 02 | 01 | 03 | 01 | 03 | 03 | 01 | 00 | 01 | 15 |
| days hail <0.5cm: | 00 | 02 | 01 | 03 | 00 | 00 | 01 | 01 | 00 | 00 | 00 | 00 | 08 |
| days hail >=0.5cm: | 00 | 00 | 00 | 00 | 00 | 00 | 01 | 01 | 00 | 00 | 00 | 00 | 02 |
| days snow/rain&snow: | 02 | 10 | 06 | 01 | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 04 | 23 |
| days snow lying at 09UTC: | 00 | 03 | 01 | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 04 |
| deepest snow cover: | - | 04 | 01 | - | - | - | - | - | - | - | - | - | 4 cm |
| (dates): | - | 25 | 04 | - | - | - | - | - | - | - | - | 28 | 25th Feb. |
| fog at 09UTC: | 00 | 01 | 01 | 00 | 00 | 00 | 00 | 00 | 00 | 00 | 02 | 01 | 05 |
Brief notes on individual months:
January: DRY/MILD OVERALL. WINDY FIRST HALF; COLD SPELLS AFTER MIDMONTH.
Click HERE for full report.
February: DRY OVERALL: MILD START, COLDER FROM MID-MONTH: SNOW LAST
WEEK. Click HERE for full report.
March: COLD/DRY FIRST THIRD; WARMER MIDMONTH ON. RAIN RETURNS 21ST ON.
Click HERE for full report.
April: COLD SNAP END FIRST WEEK, THEN UNSETTLED: MILD OVERALL. Click
HERE for full report.
May: VERY DRY OVERALL. LENGTHY COOL SPELLS - WARMER LAST WEEK. Click
HERE for full report.
June: DRY. SETTLED/COOL FIRST HALF; WARM/HOT SECOND HALF:THUNDERY END.
Click HERE for full report.
July: COOL/DAMP START. HOT SPELL MID-MONTH: HEAVY RAINFALL FINAL WEEK.
Click HERE for full report.
August: ABOVE AVERAGE RAINFALL. WARM/MAINLY DRY SECOND & LAST WEEKS.
Click HERE for full report.
September: VERY MILD & DRY OVERALL. FINE/WARM START THEN UNSETTLED.
Click HERE for full report.
October: EXCEPTIONALLY WARM; ABOVE AVERAGE RAINFALL AFTER DRY START.
Click HERE for full report.
November: WET, MILD, UNSETTLED FIRST HALF, THEN BLOCKED, COLD &
MAINLY DRY. Click HERE for full report.
December: CYCLONIC/WET START, THEN ANTICYCLONIC, MAINLY DRY: WINTRY END.
Click HERE for full report.