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Lowest Minimum: 14.1 C (57.4 F)
Average Minimum: 17.0 C (62.6 F)
Highest Minimum: 19 C (66.2 F)
Lowest Maximum: 22.5 C (72.5 F)
Average Maximum: 26.6 C (79.8 F)
Highest Maximum: 30.2 C (86.4 F)
Total Rainfall: 104.6 mm (4.12 inches)
Total Sunshine: 229 hours
Avg Sunshine / Day: 7.6 hrs/day
Total Days 0 Sunshine: 1 days
Total Days <= 3 Hrs Sunshine: 4 days
Total Days >= 8 Hrs Sunshine: 18 days
Total Days Missing Sunshine Data: 0 days
This was definitely a month of two halves. The first half was wet and cloudy. Up until the 15th, 12 of the 15 days had some precipitation and only 5.6 hours/day of sunshine on average. Also 91.6mm of rain fell, or 87.6% of the monthly total.
On the 17th, the winds largely came from the west and settled, sunnier conditions prevailed with a good run since the 19th of almost clear days .
Note that three days worth of minimum and maximum temperatures are missing (3rd quarter of the month). Not sure what is going on here with BOM as it is the second time this year (and prior to that I cannot visually see missing days going back in my daily data).
Rainfall yet again, for the fourth month running, exceeded the monthly average. However the index value of 120 suggests the total was only 20% more than the mean. Sunshine, at 229 hours, was marginally above the average of 221 hours.
Lowest Minimum: 14.1 C (57.4 F)
Average Minimum: 17.0 C (62.6 F)
Highest Minimum: 19 C (66.2 F)
Lowest Maximum: 22.5 C (72.5 F)
Average Maximum: 26.6 C (79.8 F)
Highest Maximum: 30.2 C (86.4 F)
Total Rainfall: 104.6 mm (4.12 inches)
Total Sunshine: 229 hours
Avg Sunshine / Day: 7.6 hrs/day
Total Days 0 Sunshine: 1 days
Total Days <= 3 Hrs Sunshine: 4 days
Total Days >= 8 Hrs Sunshine: 18 days
Total Days Missing Sunshine Data: 0 days
This was definitely a month of two halves. The first half was wet and cloudy. Up until the 15th, 12 of the 15 days had some precipitation and only 5.6 hours/day of sunshine on average. Also 91.6mm of rain fell, or 87.6% of the monthly total.
On the 17th, the winds largely came from the west and settled, sunnier conditions prevailed with a good run since the 19th of almost clear days .
Note that three days worth of minimum and maximum temperatures are missing (3rd quarter of the month). Not sure what is going on here with BOM as it is the second time this year (and prior to that I cannot visually see missing days going back in my daily data).
Rainfall yet again, for the fourth month running, exceeded the monthly average. However the index value of 120 suggests the total was only 20% more than the mean. Sunshine, at 229 hours, was marginally above the average of 221 hours.
Mean temperature: 8.7C (-0.2)
Mean maximum: 12.7C (-0.1)
Mean minimum: 4.8C (-0.2)
Absolute high: 22.4C
Absolute low: -1.7C
Lowest high: 2.0C
Highest low: 11.3C
Air frosts: 5
Rainfall: 29mm (-48%) on 9 days
Sunshine: 162.8 hours (-3%)
Dry, and otherwise close to average, though that's not telling the whole story. The first few days were more or less winter, with the high of 2C on the 4th being one of the coldest April days on record, then a long run of above-average temperatures with plenty of sun from the 14th to 25th. Because of the very cold March, some of the oak and horse chestnut trees are still bare, which I suspect is the first time they have been bare this late in decades.
The first six days were the coldest start to an April for 91 years, so the average weather from then on was never going to pull back such a massive negative anomaly. It is the first time for 27 years for the first four months of the year to all come in below average.
Precipitation: 27.6 mm / 1.09" (Avg: 49.3 mm / 1.94")
Precipitation > 0.1 mm: 13 days
Precipitation > 1 mm: 8 days
Highest Precipitation in a day: 6 mm / 0.24" (10th)
Sunshine: 176.4 hours
Days with abundant sunshine (more than 10 hours): 8
Days with little sunshine (less than 2 hours): 10
Sunless days: 6
So a fairly normal April temperature- and sunhsine-wise, albeit dry.
Temp profile
Year so far
Last edited by Rozenn; 05-01-2013 at 07:06 AM..
Reason: April, not March...
Precipitation: 276.4 mm / 10.9" (Avg: 107 mm) (third wettest april on record)
Precipitation > 0.1 mm: 6 days
Precipitation > 1 mm: 4 days
Days with trace: 2.
Highest Precipitation in a day: 195 mm / 7.7" (2nd)
Maxs below 20ºC: 2
Maxs above 25ºC: 12 (nine consecutive, wich is the third longest on record for April)
Mins below 10ºC: 3
Notable features of April 2013 (records commenced in 1897):
-Hottest average maximum temperature of 28.5C / 83.3F. Previous record set was in 1978 and 1999 of 28.2C / 82.8F.
-4 days of 36C+ / 97F+ were recorded. Previously, only 5 such days had ever been recorded in April having occurred on one day in 1937, 1971, 1978, 2001 and 2007.
-2nd hottest average minimum temperature for April of 16.7C. Record is 17.3C / 63F in 1978.
-The 4th time in the same calendar year that the mean April maximum has been warmer than March, others were 1924, 1927 and 1999.
-The 4th time in the same calendar year that the mean April minimum has been warmer than March, others were 1900, 1918 and 1962.
-Mean daily sunshine was 6.9 hours. The least sunny April since 1982 which had a mean of 6.7 hours.
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. I'm hoping the last of the wet season has gone (do not mind the cooler temperatures).
