September 2022 was warmer than average (13.77°C versus an average of 13.57), wetter than average (57.60 mm versus an average total of 41.08) and calmer than average (a wind run of 865 miles versus an average of 2148).
The highest temperature in the month was 23.9°C recorded at 14:46 on the 5th. The lowest temperature was 3.0°C recorded at 06:42 on the 17th, giving the first ground frost of the autumn season. This was the lowest temperature since 1.9°C was recorded on April 30th. The average temperature in the month was 13.8°C. The average daily high temperature was 18.6°C, 0.6°C above the monthly mean. The average daily low temperature was 9.7°C, equal to the mean.
The warmest day was the 3rd and 4th with an average temperature of 18.8°C. The coolest day was the the 27th with an average temperature of 8.9°C. The maximum wind chill was 23.9°C recorded at 14:46 on the 5th. The lowest wind chill was 3.0°C at 06:42 on the 17th. The maximum dew point was 17.9°C at 12:52 on the 12th, with the lowest dew point being 1.7°C recorded at 06:17 on the 17th. The monthly average dew point was 10.8°C, 0.1°C above the mean. There were no frost days.
Rainfall in the month was 57.6 millimetres recorded on 15 days, 18.1 millimetres above the average for September. The wettest day was the 5th when 12.4 millimetres of rain was recorded. The highest rain rate was 104.8 millimetres per hour at 02:00 on the 5th. The total yesrly rainfall was 333.4 millimetres, 83% of the average for the end of September. There was no snowfall recorded.
The highest barometric pressure was 1025.4 millibars recorded at 23:48 on the 20th. The lowest barometric pressure was 993.0 millibars at 18:02 on the 30th. The average pressure in the month was 1011.7 millibars. The highest humidity was 97% recorded at 04:00 on the 27th, and the monthly average humidity was 83%. The lowest humidity was 44% at 17:25 on the 16th.
Wind speeds were well below the average, with the highest wind gust speed of 24 mph being recorded at 16:11 on the 30th. The maximum wind speed was 11 mph at 16:28 on the 30th. The wind run was 864.8 miles, an all-time low.. The average gust speed in the month was 2.3 mph, and the average wind speed was 1.2 mph. The predominant direction was southerly (180°).
The maximum high solar radiation recorded at 12:38 on the 18th was 944 w/m². The average solar radiation for the month was 113 w/m². The highest U.V. Index was 3.6 recorded at 12:39 on the 18th.