Royston (Iceni) Weather Station
Daily Weather Observations - January 2011
(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 | 5.8 | 4.1 | 3.7 | 4.5 | 0.0 | 0.8 | NW | 3.9 | 15 | 8 | 1024.0 | 92.6 | 4.3 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 2 | 3.0 | -0.4 | -2.5 | 4.5 | 1.9 | 0.0 | W | 2.7 | 10 | 7 | 1027.5 | 88.0 | 1.5 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| 3 | 2.5 | 0.0 | -0.8 | 4.1 | 1.1 | 0.0 | W | 2.9 | 14 | 8 | 1023.4 | 80.9 | 1.1 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
| 4 | 5.3 | 0.9 | -0.6 | 4.0 | 0.1 | 0.2 | S | 8.1 | 26 | 6 | 1011.6 | 84.8 | 2.5 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
| 5 | 6.0 | 3.6 | 2.0 | 4.0 | 3.0 | 1.7 | S | 12.0 | 35 | 1 | 998.2 | 84.7 | 4.8 | 0 | 0 | 0 | 0 | 0 | 0 | 5 |
| 6 | 3.9 | 3.0 | 1.4 | 4.1 | 0.0 | 1.1 | NW | 2.3 | 13 | 8 | 994.9 | 89.3 | 3.3 | 0 | 0 | 0 | 0 | 0 | 0 | 6 |
| 7 | 9.5 | -0.5 | -4.5 | 4.0 | 0.1 | 8.5 | E | 5.4 | 21 | 8 | 998.4 | 93.9 | 4.6 | 0 | 0 | 0 | 0 | 0 | 0 | 7 |
| 8 | 9.3 | 8.2 | 6.9 | 4.6 | 1.6 | 0.2 | SW | 9.7 | 29 | 8 | 995.2 | 85.6 | 5.9 | 0 | 0 | 0 | 0 | 0 | 0 | 8 |
| 9 | 5.5 | 1.0 | -0.6 | 4.4 | 6.8 | 0.0 | SW | 9.7 | 25 | 0 | 1009.9 | 81.4 | 2.7 | 0 | 0 | 0 | 0 | 0 | 0 | 9 |
| 10 | 7.5 | -0.1 | -2.0 | 3.6 | 1.0 | 4.5 | S | 9.6 | 27 | 8 | 1010.6 | 87.4 | 3.9 | 0 | 0 | 0 | 0 | 0 | 0 | 10 |
| 11 | 7.0 | 3.7 | 3.0 | 3.9 | 0.0 | 5.1 | W | 8.4 | 30 | 8 | 1004.7 | 90.9 | 4.5 | 0 | 0 | 0 | 0 | 0 | 0 | 11 |
| 12 | 12.2 | 2.4 | 1.0 | 4.1 | 0.0 | 12.7 | S | 9.7 | 33 | 8 | 1009.0 | 95.8 | 8.2 | 0 | 0 | 0 | 0 | 0 | 0 | 12 |
| 13 | 12.8 | 11.0 | 10.4 | 5.5 | 0.6 | 3.2 | SW | 10.7 | 30 | 8 | 1007.4 | 93.5 | 11.9 | 0 | 0 | 0 | 0 | 0 | 0 | 13 |
| 14 | 12.0 | 11.1 | 10.0 | 6.5 | 0.0 | 1.4 | SW | 11.8 | 27 | 8 | 1007.5 | 89.7 | 10.4 | 0 | 0 | 0 | 0 | 0 | 0 | 14 |
| 15 | 11.5 | 6.5 | 4.9 | 6.6 | 0.1 | TR | SW | 14.6 | 35 | 8 | 1012.8 | 85.6 | 9.8 | 0 | 0 | 0 | 0 | 0 | 0 | 15 |
| 16 | 12.0 | 9.4 | 7.5 | 6.9 | 0.4 | 6.2 | SW | 12.3 | 34 | 7 | 1014.5 | 86.6 | 10.6 | 0 | 0 | 0 | 0 | 0 | 0 | 16 |
| 17 | 7.0 | 6.5 | 4.8 | 7.0 | 0.0 | 16.2 | SW | 2.9 | 17 | 8 | 1018.5 | 95.9 | 6.2 | 1 | 0 | 0 | 0 | 0 | 0 | 17 |
| 18 | 6.5 | 1.0 | -1.4 | 6.5 | 6.9 | 0.1 | NW | 4.5 | 18 | 0 | 1026.7 | 93.6 | 3.7 | 0 | 0 | 0 | 0 | 0 | 0 | 18 |
| 19 | 6.5 | 0.6 | -1.5 | 5.3 | 4.2 | 0.4 | W | 5.0 | 16 | 7 | 1033.6 | 93.0 | 2.4 | 0 | 0 | 0 | 0 | 0 | 0 | 19 |
| 20 | 3.8 | 1.6 | -0.5 | 4.7 | 0.0 | 1.2 | N | 2.8 | 12 | 8 | 1035.6 | 95.1 | 3.0 | 0 | 0 | 0 | 0 | 0 | 0 | 20 |
| 21 | 1.5 | -2.2 | -3.2 | 4.9 | 5.9 | 0.4 | W | 3.0 | 13 | 6 | 1038.4 | 92.3 | 0.6 | 0 | 0 | 0 | 0 | 0 | 0 | 21 |
| 22 | 5.7 | -0.5 | -2.3 | 4.3 | 0.1 | 1.3 | W | 5.5 | 22 | 8 | 1036.6 | 94.9 | 3.2 | 0 | 0 | 0 | 0 | 0 | 0 | 22 |
| 23 | 6.5 | 4.0 | 3.9 | 4.7 | 0.0 | 0.1 | N | 5.8 | 19 | 8 | 1033.6 | 96.7 | 5.5 | 0 | 0 | 0 | 0 | 0 | 0 | 23 |
| 24 | 6.4 | 4.1 | 3.0 | 5.1 | 0.0 | 0.3 | N | 6.4 | 19 | 8 | 1029.5 | 91.4 | 4.9 | 0 | 0 | 0 | 0 | 0 | 0 | 24 |
| 25 | 8.4 | 3.6 | 2.3 | 5.0 | 0.1 | 7.0 | W | 6.0 | 17 | 8 | 1015.3 | 93.9 | 6.3 | 0 | 0 | 0 | 0 | 0 | 0 | 25 |
| 26 | 6.2 | 5.1 | 4.8 | 5.5 | 0.0 | 0.9 | N | 5.4 | 21 | 8 | 1010.8 | 94.4 | 4.3 | 0 | 0 | 0 | 0 | 0 | 0 | 26 |
| 27 | 2.2 | -1.1 | -3.4 | 5.1 | 0.0 | 0.0 | NE | 6.2 | 20 | 8 | 1021.6 | 79.4 | 0.6 | 0 | 0 | 0 | 0 | 0 | 0 | 27 |
| 28 | 2.2 | -1.1 | -1.9 | 4.5 | 1.4 | 0.0 | NE | 4.7 | 17 | 8 | 1023.7 | 77.9 | -0.7 | 0 | 0 | 0 | 0 | 0 | 0 | 28 |
| 29 | 1.6 | -4.1 | -7.2 | 4.0 | 0.0 | 0.0 | NE | 4.1 | 15 | 8 | 1022.7 | 85.5 | -0.4 | 0 | 0 | 0 | 0 | 0 | 0 | 29 |
| 30 | 4.0 | -1.0 | -3.3 | 3.5 | 0.1 | 0.0 | E | 1.9 | 14 | 8 | 1023.0 | 82.9 | 1.7 | 0 | 0 | 0 | 0 | 0 | 0 | 30 |
| 31 | 3.7 | -1.1 | -5.1 | 3.5 | 7.5 | 0.0 | S | 2.5 | 15 | 5 | 1024.6 | 85.7 | 0.4 | 0 | 0 | 0 | 0 | 0 | 0 | 31 |
| Total/Mean | 6.4 | 2.6 | 0.9 | 4.8 | 42.7 | 73.5 | X | 6.5 | X | 6.9 | 1017.5 | 89.1 | 4.2 | 1 | 0 | 0 | 0 | 0 | 0 | Total/Mean |
| *Diff./% | -0.5 | +0.1 | 77% | 144% | *Diff./% | |||||||||||||||
| 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 |
Differences from average:
Differences from average shown in red. Reference periods used are as follows: Temperature 30 Years 1976/2005; 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 N/A
Air Frost Duration 57.3 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. Rainfall Intensity and Duration
January 2011 Weather Review:
......and click on the link below for a text report of the January 2011 weather in Royston
Graphs and Charts:
Links to view this month's graphs and charts will be posted here after the month end.......
January 2011 Weather Review:
......and a link will be provided here for a text report of the January 2011 weather in Royston
January (since 1973) at Royston (Iceni) Weather Station:
Mean day maximum temperature (30 years 1981/2010) 6.9°C
Mean night minimum temperature (30 years 1981/2010) 2.5°C
Highest temperature 14.2°C (6th January 1999); lowest temperature -12.7°C (14th January 1982)
Lowest grass minimum temperature -18.1°C (10th January 1982)
Warmest January 2007, 2008 (Mean temperature 7.4°C); coldest January 1979 (Mean temperature 0.1°C)
Average January rainfall (30 years 1981/2010) 51.2 mm
Wettest January 1995 (Rainfall 108.2 mm); driest January 1987 (Rainfall 9.6 mm)
Wettest Day 9th January 1992 (Rainfall 25.1 mm);
Highest number of "rain days" (0.2 mm or more) 25 (1988, 2004); lowest number of "rain days" 9 (1992)
Highest number of days with thunder 1 (1974, 1984. 1988, 1994, 1998 and 2004)
Highest number of air frosts 20 (1979, 1985)
Highest number of ground frosts 25 (1979)
Highest number of days with snow falling 15 (1985)
Highest number of days with snow lying (ground with more than 50% snow cover @ 0900 GMT) 17 (1985)
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| On Tuesday, 4th January 2011 the first partial solar eclipse of the year was experienced across a large swathe of the Northern Hemisphere from north Africa to China. In Royston the eclipse had already commenced at sunrise and reached a maximum coverage of the sun's disc of about 75%, whereas in NE Sweden about 90% was achieved. In this photograph taken at 0924GMT mid-way between Royston and Barley the eclipse was coming to an end in this locality and the extensive cloud cover which had prevented viewing of the phenomenon temporarily let a few rays of the sun illuminate this scene. Sunshine was at a premium on this day and only 8 minutes sunshine was recorded for the whole day. The temperature at this time was 1.2°C, and a SSW wind of mean speed 8 knots gusting to 12 knots was in evidence. | Despite the frost and snow and extreme cold experienced in late November and December 2010 this 'post cereal harvest' crop at Eagle Tavern 1.5 km SE of Royston looks in remarkably good condition as viewed on 18th January 2011 at 0904 GMT. In previous years this type of crop has provided food for a visiting flock of sheep but in their absence this year it will probably be just ploughed in as 'green' manure. The clear sky and sunshine in this view heralded a fine day and a sunshine total of 6.9 hours, an exception in this very dull January. The hedge and trees in the top left of the picture mark the route of the Barkway Road which forks a few metres to the left of this point, the B1368 proceeding southwards to the crest of the East Anglian Heights and Barkway, and the B1039 south-eastwards to Great Chishill and Saffron Walden. | It may be not long after sunrise but these two sugar beet harvesters to the right and left of the picture plus accompanying tractors and trailers are hard at work adjacent to the A505 road some 2 km east of Royston. The beet sugar campaign is coming to an end after the disruption across East Anglia in December due to snow and frozen ground and here the crop was quickly moved off site in order to meet processing plant deadlines. This was a particularly dull morning (26th January 2011 at 0834 GMT) and the driving drizzle in a NNW breeze of mean speed 4 knots gusting to 10 knots was not ideal for the task. At least the temperature was a reasonable 5.2°C but the ground was very wet after the wet and dull January. No sunshine at all was recorded on this day and in the 6 day period from 23rd to 27th inclusive sunshine totalled only 4 minutes! |
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(This page last updated 14th February 2011 2218 GMT)