Royston (Iceni) Weather Station
Daily Weather Observations - September 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 | 21.0 | 9.2 | 6.0 | 15.5 | 12.5 | 0.0 | E | 2.7 | 17 | 0 | 1014.2 | 72.3 | 14.7 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 2 | 26.5 | 12.4 | 9.4 | 16.0 | 11.4 | 0.0 | W | 4.9 | 21 | 3 | 1010.2 | 72.1 | 19.2 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| 3 | 24.2 | 14.1 | 13.4 | 17.3 | 7.4 | 0.0 | SW | 7.1 | 21 | 8 | 1007.7 | 77.4 | 18.3 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
| 4 | 20.2 | 14.4 | 12.9 | 17.4 | 1.9 | 5.4 | S | 6.7 | 21 | 8 | 1005.5 | 85.2 | 16.1 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
| 5 | 19.5 | 10.3 | 8.5 | 16.4 | 6.9 | 1.7 | SW | 12.0 | 33 | 5 | 1009.4 | 76.7 | 14.4 | 0 | 0 | 0 | 0 | 0 | 0 | 5 |
| 6 | 18.5 | 13.5 | 12.4 | 16.3 | 0.1 | 0.1 | SW | 15.5 | 40 | 8 | 1004.8 | 80.8 | 15.3 | 0 | 0 | 0 | 0 | 0 | 0 | 6 |
| 7 | 17.9 | 11.5 | 10.0 | 15.5 | 3.5 | 0.4 | SW | 12.6 | 31 | 3 | 1008.9 | 74.4 | 14.2 | 0 | 0 | 0 | 0 | 0 | 0 | 7 |
| 8 | 18.6 | 12.3 | 11.1 | 15.4 | 0.7 | 0.0 | SW | 9.7 | 27 | 8 | 1007.5 | 84.4 | 15.2 | 0 | 0 | 0 | 0 | 0 | 0 | 8 |
| 9 | 23.3 | 14.7 | 12.9 | 15.7 | 2.4 | 0.0 | SW | 6.5 | 20 | 8 | 1008.5 | 83.8 | 18.5 | 0 | 0 | 0 | 0 | 0 | 0 | 9 |
| 10 | 23.5 | 16.5 | 14.9 | 16.7 | 1.9 | 0.3 | S | 9.1 | 31 | 8 | 1003.1 | 83.0 | 18.7 | 0 | 0 | 0 | 0 | 0 | 0 | 10 |
| 11 | 21.5 | 14.0 | 12.4 | 16.6 | 8.1 | 0.7 | SW | 10.6 | 36 | 3 | 1003.6 | 79.1 | 16.2 | 0 | 0 | 0 | 0 | 0 | 0 | 11 |
| 12 | 22.0 | 14.5 | 13.2 | 16.5 | 8.3 | 0.0 | SW | 16.1 | 47 | 7 | 1002.3 | 74.7 | 17.1 | 0 | 0 | 0 | 0 | 0 | 0 | 12 |
| 13 | 19.1 | 11.8 | 9.9 | 16.3 | 8.9 | 0.9 | SW | 12.1 | 31 | 2 | 1010.3 | 72.7 | 14.0 | 0 | 0 | 0 | 0 | 0 | 0 | 13 |
| 14 | 20.0 | 9.7 | 8.0 | 15.4 | 8.3 | 0.0 | W | 8.3 | 25 | 0 | 1016.6 | 71.9 | 13.9 | 0 | 0 | 0 | 0 | 0 | 0 | 14 |
| 15 | 19.5 | 8.1 | 4.4 | 15.4 | 6.7 | 0.2 | NW | 2.1 | 11 | 2 | 1019.8 | 76.9 | 13.6 | 0 | 0 | 0 | 0 | 0 | 0 | 15 |
| 16 | 21.8 | 11.0 | 8.4 | 15.4 | 3.5 | 0.0 | SE | 4.6 | 23 | 7 | 1012.1 | 78.8 | 15.9 | 0 | 0 | 0 | 0 | 0 | 0 | 16 |
| 17 | 18.4 | 12.5 | 10.6 | 15.5 | 7.7 | 0.8 | SW | 9.0 | 32 | 3 | 1004.2 | 76.6 | 13.8 | 0 | 0 | 0 | 0 | 0 | 0 | 17 |
| 18 | 18.1 | 8.0 | 5.9 | 14.9 | 7.5 | 0.0 | W | 4.8 | 15 | 1 | 1002.9 | 81.3 | 12.0 | 0 | 0 | 0 | 0 | 0 | 0 | 18 |
| 19 | 20.1 | 9.9 | 6.9 | 14.7 | 7.8 | 0.0 | W | 8.9 | 30 | 1 | 1011.9 | 78.6 | 14.4 | 0 | 0 | 0 | 0 | 0 | 0 | 19 |
| 20 | 20.0 | 14.2 | 12.5 | 15.4 | 1.3 | 4.3 | SW | 9.4 | 27 | 8 | 1016.2 | 83.0 | 16.6 | 0 | 0 | 0 | 0 | 0 | 0 | 20 |
| 21 | 18.0 | 11.8 | 10.4 | 15.9 | 3.5 | TR | SW | 7.9 | 29 | 8 | 1015.7 | 80.9 | 13.9 | 0 | 0 | 0 | 0 | 0 | 0 | 21 |
| 22 | 19.3 | 11.2 | 8.7 | 15.2 | 5.4 | 0.1 | W | 7.5 | 24 | 2 | 1018.3 | 76.1 | 14.3 | 0 | 0 | 0 | 0 | 0 | 0 | 22 |
| 23 | 19.8 | 9.2 | 7.5 | 15.0 | 10.3 | 0.0 | SW | 5.6 | 17 | 2 | 1016.9 | 78.2 | 13.9 | 0 | 0 | 0 | 0 | 0 | 0 | 23 |
| 24 | 20.6 | 9.6 | 8.1 | 15.1 | 7.9 | 0.0 | S | 6.1 | 19 | 1 | 1013.7 | 78.5 | 14.6 | 0 | 0 | 0 | 0 | 0 | 0 | 24 |
| 25 | 21.6 | 11.8 | 10.5 | 14.9 | 8.0 | 0.5 | S | 8.9 | 29 | 2 | 1014.6 | 79.8 | 16.4 | 0 | 0 | 0 | 0 | 0 | 0 | 25 |
| 26 | 23.1 | 15.4 | 13.5 | 15.4 | 4.0 | 0.0 | SW | 4.3 | 20 | 8 | 1020.0 | 79.6 | 16.9 | 0 | 0 | 0 | 0 | 0 | 0 | 26 |
| 27 | 22.1 | 11.6 | 10.0 | 15.6 | 7.9 | 0.0 | SW | 4.4 | 15 | 8 | 1027.8 | 85.7 | 16.1 | 0 | 0 | 0 | 0 | 0 | 0 | 27 |
| 28 | 25.7 | 13.7 | 12.0 | 15.6 | 11.0 | 0.0 | S | 5.1 | 17 | 0 | 1026.0 | 80.4 | 18.5 | 0 | 0 | 0 | 0 | 0 | 0 | 28 |
| 29 | 28.5 | 15.6 | 13.2 | 16.0 | 11.0 | 0.0 | SE | 4.9 | 16 | 0 | 1023.1 | 72.1 | 20.3 | 0 | 0 | 0 | 0 | 0 | 0 | 29 |
| 30 | 28.7 | 15.0 | 10.6 | 16.1 | 10.9 | 0.0 | SE | 5.6 | 19 | 0 | 1022.2 | 67.4 | 20.7 | 0 | 0 | 0 | 0 | 0 | 0 | 30 |
| Total/Mean | 21.4 | 12.3 | 10.3 | 15.8 | 196.6 | 15.4 | X | 7.8 | X | 4.1 | 1012.6 | 78.1 | 15.9 | 0 | 0 | 0 | 0 | 0 | 0 | Total/Mean |
| *Diff./% | +2.2 | +1.4 | 139% | 29% | *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 0.0 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 & Duration
September 2011 Weather Review:
......and click on the link below for a text report of the September 2011 weather in Royston
September (since 1972) at Royston (Iceni) Weather Station:
Mean day maximum temperature (30 years 1981/2010) 19.2°C
Mean night minimum temperature (30 years 1981/2010) 10.9°C
Highest temperature 29.6°C (5th September 1973); lowest temperature 2.0°C (22nd September 1979)
Lowest grass minimum temperature -1.4°C (30th September 1988)
Warmest September 2006 (Mean temperature 18.1°C); coolest September 1972 (Mean temperature 12.0°C)
Average September rainfall (30 years 1981/2010) 53.8 mm
Wettest September 1995 (Rainfall 138.7 mm); driest September 2009 (Rainfall 8.3 mm)
Wettest Day 22nd September 1992 (Rainfall 78.1 mm);
Highest number of "rain days" (0.2 mm or more) 21 (1974, 1995); lowest number of "rain days" 3 (2009)
Highest number of days with thunder 6 (1984)
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| Two colourful sunsets were experienced in Royston within a 3 day period in September 2011, the first on 6th and the second on 8th (the one illustrated above). The 6th had been a cloudy day and a partial clearance of the cloud just before sunset enabled 3 minutes sunshine to be recorded for the day! The 8th was similarly mostly cloudy and only 0.7 hours sunshine was registered that day. The photograph above was take at 1840 GMT across the town from its eastern side. The weather conditions at sunset comprised of a SW wind of mean speed 5 knots gusting to 9 knots in a temperature of 17.8°C. This temperature was not far below the day's maximum of 18.6°C. | After the exceptionally dry Spring, and slightly drier than average Summer, ground conditions in the Royston area have remained very dry with the situation being exacerbated by the very dry September. This field on the SE side of Royston (as seen at 0800 GMT on 20th September 2011) well illustrates the Sahel like conditions, having been ploughed, rolled and re-drilled after harvesting the crop of oats. Rainfall of 4.3 millimetres later on 20th must have had an effect on germination of the new crop as just one week later this field exhibited a green 'sheen'. This was a breezy day, a SSW wind gusting to 21 knots at this time (daily maximum gust speed 24 knots). | The restoration of Bedfordshire's 'Jewel in the Crown' Wrest Park at Silsoe (27 km SSW of Royston) by English Heritage continues apace and this picture shows the Italian Garden on 22nd September 2011 at 1209 GMT. Only 3 months previously this garden had been completely stripped for restoration and the cultivable areas contained only bare soil!. This garden adjacent to the main house was originally laid out by Earl de Grey in about 1840 for his wife Henrietta who would have been able to view it through the conservatory (facing) from the comfort of her sitting room. Only one (of Pomona, the Roman Goddess of fruit) of the four original statues in the garden remains and is visible by the far (north) wall. |
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(This page last updated 13th October 2011 2012 GMT)