May 2019 was cooler than average (11.0°C versus an average of 11.5), drier than average (23.40 mm versus an average total of 44.13) and calmer than average (a wind run of 2132 miles versus an average of 2724).
The highest temperature in the month was 21.3°C recorded at 16:30 on the 30th, 1.9°C below the mean for the month. The minimum temperature was 0.4°C recorded at 05:01 on the 5th, equalling the lowest May temperature set on May 5th 2012. The average temperature in the month was 11.0°C, 0.5°C below the mean. The average daily high temperature was 15.6°C, 0.2°C below the mean, and the average daily low temperature was 6.5°C, 0.7°C below the mean. The warmest day was the 30th with an average temperature of 16.7°C, while the coldest day was the 4th with an average temperature of 6.1°C.
The monthly average wind chill was 10.8°C. The high dew point was 16.6°C at 13:57 on the 20th, with the low dew point being -1.0°C at 05:01 on the 5th. The monthly average dew point was 7.1°C. There were 222.9 hours of sunshine in the month, the sunniest day being the 14th when 11.6 hours was recorded.
Rainfall in the month totalled 23.4 millimetres, well below the average of 41.8 milliemtres. This was the lowest rainfall ever recorded here in May, beating the previous low of 25.6 millimetres set in 2010. The year to date total of 170.4 millimetres is 84.9% of the expected May end total. The wettest day was the 8th with 8.8 millimetres..The highest rain rate occured at 16:01 on the 11th when a rate of 24.0 millimetres per hour was recorded. There was no snow recorded.
The highest barometric pressure of 1039.6 millibars was at 10:17 on the 13th, a record for May, beating the previous high of 1037.8 millibars set on May 12th 2012. The lowest pressure was 988.1 millibars at 15:39 on the 8th. The average pressure in the month was 1015.9 millibars. The highest humidity was 98% at 06:39 on the 29th, and the monthly average humidity was 78%. The lowest humidity was 35% at 17:31 on the 23rd.
Winds were much lower than average in the month, with the highest wind gust speed being 26 mph recorded at 16:11 on the 30th, 3.6 mph below the month average. The maximum wind speed was 15 mph at 16:15 on the 30th, 2.5 mph below the mean. The wind run was 2131.7 miles, well below the May average of 2950.9 miles. The average gust speed in the month was 4.5 mph, 2.3 mph below the mean. The average wind speed was 2.9 mph, 2.2 mph below the mean. The predominant direction was southerly (183°).
The maximum high solar radiation recorded at 12:19 on the 28th was 1225 w/m², the highest since 1294 w/m² was recorded on June 20th 2018. The average solar radiation for the month was 192 w/m². The highest U.V. Index was 6.0 recorded at 11:40 on the 30th, the highest since 6.1 was recorded on August 6th 2018.