As with August, September was another average month, although it was the coolest September so far recorded here. Winds were light and rainfall was below average.
The maximum temperature in the month was 20.4°C recorded at 15:45 on the 10th. The lowest temperature was 4.8°C at 06:53 on the 26th, with the mean temperature being 12.0°C. This was the lowest mean temperature and the lowest maximum temperature ever recorded here in September. The maximum dew point was 15.9°C at 13:40 on the 12th, with the minimum dew point being 4.0°C on the 26th at 07:55. The average dew point was 9.3°C, a September low. There were 146.81 hours of sunshine in the month, a record for September. The highest UV index was 4.2 on the 2nd, with the month average being 2.8.
There were 25.6 millimetres of rain in the month, recorded on 17 days, equalling the highest number of rain days in September. The wettest day was the 12th when 7.8 millimetres was recorded, with a rain rate of 117.6 mm/hr being recorded at 11:22 on this date.
Winds in September were light, with the average wind speed being 2.6 mph and the average gust speed 4.1 mph. The highest wind speed recorded was 13 mph at 13:20 on the 11th, with the highest gust speed being 24 mph at 14:40, also on the 11th. The predominant wind direction was 195° SSW and the total wind run was 1853.80 miles.
The average barometric pressure was 1016.5 millibars, with the highest being 1037.9 millibars at 11:36 on the 28th and the lowest 987.8 millibars at 18:51 on the 16th.
