September 2019 was equal to the average temperature at 13.4°C, wetter than average (104.20 mm versus an average total of 37.09) and windier than average (a wind run of 2388 miles versus an average of 2199).
The highest temperature in the month was 22.6°C recorded at 16:03 on the 21st. The lowest temperature was 4.6°C recorded at 07:01 on the 8th and the monthly average was 13.4°C The average daily high temperature was 18.0°C, 0.3°C above the mean. The average daily low temperature was 9.6°C, the same as the mean. The warmest days were the 3rd and the 21st with temperatures of 15.8°C. The coolest day was the 8th with an average of 10.8°C.
The average wind chill in the month was 13.2°C and the average dew point was 10.5°C. The high dew point was 17.2°C recorded at 15:33 on the 12th. The low dew point was 3.4°C recorded at 07:01 on the 8th. There were 154.2 hours of sunshine in the month, with the sunniest day being the 5th when 8.9 hours were recorded.
Rainfall in the month was 104.2 millimetres, easily the wettest ever September. The mean for the month is now 40.0 millimetres. Rainfall was recorded on 18 days, with the wettest day being the 24th when 31.8 millimetres was recorded. This was the highest since 32.4 millimetres was recorded on July 23rd 2013. This was the fifth wettest day ever recorded here. The highest rain rate was 75.8 millimetres per hour recorded at 11:31 on the 24th. The year to date total is now 524 millimetres, 130% of the average for the end of September.
The highest barometric pressure of 1035.9 millibars was at 23:24 on the 13th. The lowest pressure was 989.6 millibars at 12:39 on the 29th. The average pressure in the month was 1015.1 millibars. The highest humidity was 98% at 14:22 on the 24th, and the monthly average humidity was 84%. The lowest humidity was 43% at 17:00 on the 21st.
Wind speeds were slightly higher than average, with the highest wind gust speed being 28 mph recorded at 14:40 on the 27th, 2.0 mph below the month average. The maximum wind speed was 15 mph at 14:46 on the 27th, 2.4 mph below the mean. The wind run was 2388.2 miles, below the September mean of 2402.5 miles. The average gust speed in the month was 5.0 mph, 0.5 mph below the mean. The average wind speed was 3.3 mph, 0.2 mph below the mean. The predominant direction was south-westerly (223°).
The maximum high solar radiation recorded at 12:46 on the 1st was 1014 w/m². The average solar radiation for the month was 126 w/m². The highest U.V. Index was 4.6 recorded at 13:22 on the 3rd, slightly below the September average of 4.7.