Royston (Iceni) Weather Station

Daily Weather Observations - February 2004

(All Times GMT)

Date Max. Temp. (°C) 09/09h Min. Temp. (°C) 09/09h Grass Min. Temp. (°C) 21/09h Earth (30cms) Temp. (°C) 09h Sun (Hours) 00/00h R'fall (MM) 09/09h Wind Dir'n 09h Mean Wind Speed (MPH) 00/00h Max. Gust Speed (MPH) 00/00h Cloud Cover (Oktas) 09h Mean MSL Air Pressure (mB) 00/00h Mean Rel. Humd. (%) 00/00h Mean Temp. (°C) 00/00h Fog (vis. <1000m @ 09h) Fog (vis. <200m @ 09h) Snow or Rain and Snow 00/00h Snow Lying @ 09h (>50% cover) Hail 00/00h Thunder 00/00h Date
1 11.5 8.5 6.1 5.4 4.3 3.9 SW 11.2 46 1 1007.8 85.3 9.9 0 0 0 0 0 0 1
2 14.1 9.6 8.5 6.0 0.7 0.1 SW 11.2 39 8 1015.1 88.4 11.5 0 0 0 0 0 0 2
3 15.2 11.5 10.4 7.1 0.5 TR SW 14.6 46 8 1017.7 88.0 13.5 0 0 0 0 0 0 3
4 16.4 12.0 11.3 8.0 2.4 TR SW 13.0 46 8 1018.7 85.5 13.5 0 0 0 0 0 0 4
5 12.6 11.6 11.0 8.5 0.0 14.3 SW 5.9 25 8 1020.2 91.4 11.5 0 0 0 0 0 0 5
6 8.3 7.7 7.4 8.5 0.6 5.2 NW 4.8 44 8 1011.1 93.8 8.1 0 0 0 0 0 0 6
7 9.4 5.0 3.4 7.9 4.8 2.1 SW 11.6 41 3 1011.8 77.1 6.0 0 0 0 0 0 0 7
8 8.1 1.4 0.0 6.8 2.4 TR NW 11.3 48 1 1019.3 67.8 3.9 0 0 1 0 0 0 8
9 5.0 -1.6 -4.3 5.7 8.2 0.0 W 1.6 18 3 1035.7 72.2 1.0 0 0 0 0 0 0 9
10 8.7 2.1 1.3 4.8 2.4 0.0 SW 6.4 28 8 1030.6 78.2 5.7 0 0 0 0 0 0 10
11 10.8 7.4 5.0 5.5 0.0 0.2 NW 1.5 23 8 1030.2 92.7 8.4 0 0 0 0 0 0 11
12 9.8 6.6 5.8 6.4 0.0 0.0 CALM 0.2 9 8 1034.6 91.2 7.9 0 0 0 0 0 0 12
13 9.6 7.9 7.3 6.9 0.0 2.2 SW 1.9 14 8 1034.0 87.0 8.0 0 0 0 0 0 0 13
14 7.3 5.4 2.6 7.0 0.0 0.3 W 0.4 12 8 1027.9 96.3 6.0 0 0 0 0 0 0 14
15 10.5 5.0 4.5 6.9 1.1 TR NW 0.4 14 8 1027.6 92.9 6.1 0 0 0 0 0 0 15
16 6.9 4.8 4.3 7.0 0.0 1.0 N 0.2 12 8 1030.6 85.4 5.1 0 0 0 0 0 0 16
17 6.7 4.6 3.5 6.7 0.0 1.4 NW 0.9 16 8 1030.5 93.8 5.1 0 0 0 0 0 0 17
18 7.5 1.5 -1.1 6.5 0.5 0.5 NW 2.2 23 8 1031.4 94.1 4.3 0 0 0 0 0 0 18
19 7.4 -0.5 -4.0 6.3 7.3 0.0 NE 3.1 23 0 1028.6 85.0 2.7 0 0 0 0 0 0 19
20 4.4 -2.5 -5.3 5.3 3.0 0.0 NE 2.1 25 0 1023.1 84.2 0.8 0 0 0 0 0 0 20
21 6.3 -2.9 -6.0 4.5 1.2 0.0 NE 3.6 28 8 1016.5 88.8 1.6 0 0 0 0 0 0 21
22 5.1 1.9 -1.4 4.7 2.6 0.2 N 5.2 35 6 1017.5 81.5 2.4 0 0 1 0 0 0 22
23 5.5 -1.2 -3.5 4.4 4.2 0.2 NW 2.7 23 1 1023.5 82.8 1.0 0 0 1 0 0 0 23
24 5.0 -1.0 -3.4 4.0 0.2 4.2 SW 4.3 25 8 1015.7 88.6 1.7 0 0 0 0 0 0 24
25 3.3 -2.2 -5.6 4.1 8.8 0.0 NW 2.1 23 1 1010.9 78.5 -0.3 0 0 1 1 0 0 25
26 4.0 -4.0 -6.1 3.6 7.4 0.1 W 2.2 23 1 1003.8 71.1 -0.9 0 0 0 0 0 0 26
27 3.2 -3.2 -5.6 3.0 0.2 TR NW 3.9 30 8 1000.9 83.3 -0.1 0 0 1 1 0 0 27
28 2.4 -1.7 -4.6 2.7 0.2 3.1 N 1.9 18 8 1008.5 93.5 0.3 0 0 1 0 1 0 28
29 6.0 -1.7 -4.6 2.6 6.2 0.0 N 0.9 18 8 1023.3 89.0 0.6 0 0 1 1 0 0 29
Total/Mean 8.0 3.2 1.3 5.8 69.1 39.0 X 4.6 X 5.8 1020.9 85.8 5.0 0 0 7 3 1 0 Total/Mean
*Diff./% +0.8 +1.4     95% 111%                           *Diff./%

Differences from average:

Differences from average shown in red. Reference periods used are as follows: Temperature 30 Years 1973/2002; rainfall 30 Years 1971/2000; sunshine 30 Years 1971/2000.

(*The differences from average quoted during the course of the month relate to the cumulative daily averages up to the date of the last observation, not the averages for the month as a whole)

Additional Data:

Rainfall Duration  46.3 hours

Air Frost Duration  95.8 hours

Graphs and Charts:

Click on the following links to view this month's graphs and charts.....

1. Daily Maximum, Minimum & Grass Minimum Temperatures 

2. Daily Maximum & Minimum Temperatures (with 30 Year Comparative Means) 

3. Daily Earth (30 cms Depth) Temperature @ 0900 GMT  4.  Daily Rainfall  5.  Daily Sunshine

6. Daily Maximum Gust & Mean Wind Speed   7. Daily Wind Direction @ 0900 GMT  

8.  Daily Mean MSL Air Pressure  9.  Daily Mean Relative Humidity  10.  Thermograph 

11.  Barograph  12.   Hygrograph  13.  Anemograph   14. Wind Direction

15. Sunshine Duration  16.  Rainfall Intensity & Duration

February 2004 Weather Review:

......and click on the link below for a text report of the February 2004 weather in Royston

February 2004 Weather Review

February (since 1973) at Royston (Iceni) Weather Station:

Mean day maximum temperature (30 years 1973/2002) 7.2°C

Mean night minimum temperature (30 years 1973/2002) 1.8°C

Highest temperature 18.5°C (13th February 1998); lowest temperature -10.5°C (12th & 13th February 1985)

Lowest grass minimum temperature -14.5°C (10th February 1986)

Warmest February 1990 (Mean temperature 8.1°C); coldest February 1986 (Mean temperature -1.6°C)

Average February rainfall (30 years 1971/2000) 35.0 mm

Wettest February 2001 (Rainfall 90.7 mm); driest February 1998 (Rainfall 4.8 mm)

Wettest Day 7th February 2001 (Rainfall 21.8 mm);

Highest number of "rain days" (0.2 mm or more) 21 (2000); lowest number of "rain days" 5 (1998)

Highest number of days with thunder 2 (1995)

Highest number of air frosts 24 (1986)

Highest number of ground frosts 25 (1986)

Highest number of days with snow falling 15 (1986)

Highest number of days with snow lying (ground with more than 50% snow cover @ 0900 GMT) 23 (1986)

Due to the relatively moist upper air in the morning of 9th February 2004 aircraft contrails were slow to dissipate and pronounced displays of this phenomenon were seen over central England. In this view (as seen at 0914 GMT) looking north-westwards from Hyde Hill, Royston over the northern fringes of the town and beyond on to the South Cambridgeshire Plain, an abundance of contrails can be detected, albeit mostly in an advanced state of dissipation. After an overnight minimum of -1.6°C the temperature is -0.5°C, later rising to a maximum of 5.0°C. The wind direction is westerly and of mean speed 4 knots, gusting to 10 knots. A very sunny day followed (8.2 hours sunshine). It may still be the winter season but the Winter Garden at Anglesey Abbey, Cambridgeshire (28 km NE of Royston) is alive with blossom and colour as evidenced in this photograph taken at 1318 GMT on 21st February 2004. In addition to the shrubs and trees in blossom many specimens exhibit coloured stems and branches to complement the many shades of green and add to the overall effect. Although the temperature is not far from average at 6°C (maximum temperature at Royston 6.3°C, 1.0°C below the 30 Year mean for this day) a fairly strong NE wind is introducing a significant wind chill factor. The day was predominantly bright but cloudy, and bright sunshine was restricted to just 1.2 hours at Royston.    At first sight this scene at the Newmarket Road Playing Field in Royston (as seen on 25th February 2004 at 0903 GMT) may appear to show a branch of a tree but it is, in fact, the trunk! It stands prominently at one of the entrances to the Playing Field and takes a horizontal gait for most of its length. An overnight snow shower has left a light covering of snow, visible also on Hyde Hill in the distance. The temperature is -1.3°C (overnight minimum -2.2°C), whilst the wind is from a north-westerly direction, and of mean speed 2 knots, gusting to 10 knots. Bright sunshine (total 8.8 hours) prevailed for most of the day, which made a welcome change from the rather dull nature of much of February to date.  

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(This page last updated 2nd March 2004 2040 GMT)