Royston (Iceni) Weather Station

Daily Weather Observations - May 2004

(All Times GMT)

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  45.1 hours

Air Frost Duration  NIL 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

May 2004 Weather Review:

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

May 2004 Weather Review

May (since 1972) at Royston (Iceni) Weather Station:

Mean daily maximum temperature (30 years 1973/2002) 16.8°C

Mean daily minimum temperature (30 years 1973/2002) 7.2°C

Highest temperature 28.4°C (24th May 1989); lowest temperature -1.0°C (16th May1996)

Lowest grass minimum temperature -5.2°C (16th May 1996)

Warmest May 1992 (Mean temperature 14.5°C); coldest May 1984, 1996 (Mean temperature 9.7°C)

Average May rainfall (30 years 1971/2000) 47.0 mm

Wettest May 1983 (Rainfall 125.2 mm); driest May 1990 (Rainfall 3.7 mm)

Wettest Day 5th May 1978 (Rainfall 52.5 mm);

Highest number of "rain days" (0.2 mm or more) 22 (1983); lowest number of "rain days" 3 (1990)

Highest number of days with thunder 8 (1983)

Highest number of air frosts 4 (1996)

Highest number of ground frosts 14 (1996)

Highest number of days with snow falling 2 (1997)

Highest number of days with snow lying (ground with more than 50% snow cover @ 0900 GMT) 0 

The rock garden in the University Botanic Garden in Cambridge (some 21 km NE of Royston) is the subject of this view at 1204 GMT on 18th May 2004. With some 8000 different specimens in the Botanic Garden there is always plenty of interest at any time of the year. Royston and Cambridge are both in the same river catchment area (Great Ouse), and data from the weather station in the Botanic Garden and from Royston (Iceni) Weather Station indicate both places normally experience remarkably similar meteorological conditions. Although cloud increased in the afternoon a sunshine total of 13.1 hours for the day was nonetheless recorded at Royston, and a maximum temperature of 21.5°C was achieved..	This view from the Greenwich Meridian at Burloes, Royston across the field of beans in the foreground shows the small community at Eagle Tavern nestling at the foot of the hill separating it from the town of Royston approximately 1 km distant. The original Eagle Tavern P H is the red building just discernible at the left of the group of buildings, whilst in the far distance the East Anglian Heights rise to 150 metres above mean sea-level. The early sunshine evident in the picture (which was taken at 0752 GMT on 20th May 2004) did not last and sunshine for the day was restricted to 4.4 hours. The maximum temperature recorded was almost 2°C above the 30 Year average for this day at 19.5°C	Once again this Spring the rolling expanses of arable land surrounding Royston have been speckled with patches of oilseed rape, an example of which is shown in this view from Poor's Land (mid-way between Royston and Barley) looking in a north-easterly direction at 0820 GMT on 22nd May 2004. Here the chalk upland of the East Anglian Heights (to the rear of the photographer) is undulating gently towards the flatter South Cambridgeshire Plain in the distance. Cumulus cloud is rapidly developing in a northerly breeze of 3 knots gusting to 10 knots but the day was essentially a sunny one with a total of 12.6 hours sunshine. After an overnight minimum temperature of 2.4°C a maximum value of 16.3°C was later recorded.

Return to Welcome to Royston (Iceni) Weather Station page

(This page last updated 7th June 2004 2014 GMT)