April 2018 was warmer and wetter than normal. This was the third warmest April recorded here and the second wettest. Winds were about average.
At 18:36 on the 19th, the maximum temperature reached 24.8°C, the highest temperature since 25.0°C was recorded on July 17th 2017. This was the warmest April day ever recorded here, beating the previous highest of 24.4°C recorded on April 23rd 2011. The minimum temperature in the month was 0.4°C recorded at 07:00 on the 2nd. The average temperature for the month was 9.1°C, 0.6°C above the monthly mean. The average daily maximum temperature was 12.5°C, with the average daily minimum temperature being 6.0°C. The warmest day was the 19th with an average of 18.4°C, with the coldest day being the 1st with an average temperature of 3.1°C. There were no frost days in the month.
The highest dew point was 15.6°C at 17:47 on the 21st, with the minimum dew point being -1.8°C at 17:22 on the 5th. The monthly average dew point was 6.4°C. The high wind chill was 24.8°C at 18:36 on the 19th, with the low wind chill being -3.8°C at 06:47 on the 2nd. The average monthly wind chill was 8.2°C. There were 128.66 hours of sunshine, with the sunniest day being the 19th when 10.41 hours was recorded.
Rainfall in the month was 70.4 millimetres, the second highest April total, beaten only by a whopping 151.8 millimetres recorded in 2012. Rainfall was recorded on 18 days, with the wettest day being the 2nd when 21.0 millimetres was recorded. The highest rain rate was 57.6 millimetres recorded at 17:34 on the 25th. The yearly rainfall total is now 237.4 millimetres, 150% of what is normally expected by the end of April. The only snow recorded in the month was the 5.0 millimetres recorded on the 2nd.
The highest barometric pressure was 1025.5 millibars at 12:17 on the 18th. This was the lowest maximum pressure recorded here in April. The lowest barometric pressure was 988.7 millibars at 16:33 on the 4th. The average pressure in the month was 1009.0 millibars. The highest humidity was 100% and the monthly average humidity was 84%. The lowest humidity was 43% at 17:22 on the 5th, equalling the highest monthly low for April.
The highest wind gust in the month was 28 mph recorded at 14:05 on the 26th.. The average gust speed in the month was 6.7 mph, mean 6.9 mph. The average wind speed was 4.3 mph, mean 4.3 mph. The maximum wind speed was 14 mph at 13:16 on the 25th, 5.5 mph below the mean. The total wind run was 3045.1 miles, with the predominate direction being 158°.
The maximum high solar radiation recorded at 14:32 on the 5th was 1032 w/m², the highest since 1044 w/m² was recorded on August 19th 2017. The average solar radiation for the month was 118 w/m². The highest U.V. Index was 4.1 set at 13:00 on the 20th, the highest since 4.6 was recorded on September 4th 2017.