Daily Report for 23rd December 2018
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| Measure | Value (anomaly) | Time | Month cumul. | Record High | Record Low |
| Minimum Temperature | 6.1 °C (+3.1) | 23:36 | 5.5 °C (+2.2) | 10.8 °C (+7.8), 2014 | -3.9 °C (-6.9), 2009 |
| Maximum Temperature | 12.7 °C (+5.3) | 15:27 | 10.1 °C (+2.1) | 12.9 °C (+5.5), 2012 | 1.9 °C (-5.5), 2010 |
| Mean Temperature | 8.8 °C (+4.2) | 8.0 °C (+2.2) | 11.7 °C, 2014 | -0.5 °C, 2009 | |
| Minimum Humidity | 87% | 17:21 | 77% | 98%, 2009 | 63%, 2015 |
| Maximum Humidity | 95% | 11:32 | 93% | 98%, 2009 | 76%, 2014 |
| Mean Humidity | 92% | 86% | 98%, 2009 | 72%, 2014 | |
| Minimum Pressure | 1014 hPa | 12:39 | 1007 hPa | 1030 hPa, 2017 | 978 hPa, 2013 |
| Maximum Pressure | 1025 hPa | 23:51 | 1017 hPa | 1037 hPa, 2017 | 991 hPa, 2009 |
| Mean Pressure | 1018 hPa | 1012 hPa | 1033 hPa, 2017 | 990 hPa, 2009 | |
| Mean Wind Speed | 4.3 mph (-0.8) | 5.9 mph (+0.8) | 12.1 mph, 2013 | 1.5 mph, 2009 | |
| Maximum Wind Speed | 14.3 mph | 13:36 | 15.1 mph | 31.7 mph, 2013 | 8.1 mph, 2009 |
| Maximum Gust | 23.0 mph | 12:57 | 24.3 mph | 47.6 mph, 2013 | 13.8 mph, 2009 |
| Mean Wind Direction | W | ||||
| Rainfall | 5.1 mm | 61.3 mm (148%) | 15.2 mm, 2013 | ||
| Maximum Hourly Rain | 1.1 mm | 08:32 | 2.8 mm, 2011 | ||
| Maximum 10-min Rain | 0.4 mm | 08:21 | 1.4 mm, 2011 | ||
| Maximum Rain Rate | 2.2 mm/h | 08:21 | 20 mm/h, 2011 | ||
| Minimum Dew Point | 4.9 °C | 23:54 | 3.4 °C | 7.1 °C, 2012 | -4.8 °C, 2010 |
| Maximum Dew Point | 11.3 °C | 15:27 | 8.1 °C | 12.6 °C, 2012 | -1.9 °C, 2010 |
| Mean Dew Point | 7.7 °C | 5.8 °C | 9.6 °C, 2012 | -3.0 °C, 2010 | |
| Measure | Value | Time | Month cumul. | Record High | Record Low |
| Night Minimum (21-09) | * 7.3 °C * | 02:13 | 6.3 °C | 11.8 °C, 2012 | -3.9 °C, 2009 |
| Day Maximum (09-21) | 12.7 °C | 15:27 | 10.0 °C | 12.8 °C, 2014 | 1.9 °C, 2010 |
| Max 10m Temp Rise | 0.3 °C | 12:17 | 0.3 °C | 0.4 °C, 2009 | 0.1 °C, 2011 |
| Max 1hr Temp Rise | 1.0 °C | 12:37 | 1.1 °C | 1.5 °C, 2009 | 0.3 °C, 2012 |
| Max 1hr Hum Rise | 5% | 18:21 | 6% | 9%, 2011 | 0%, 2009 |
| Max 10m Temp Fall | 1.4 °C | 17:21 | 0.4 °C | 1.4 °C, 2018 | 0.1 °C, 2012 |
| Max 1hr Temp Fall | 4.2 °C | 18:10 | 1.1 °C | 4.2 °C, 2018 | 0.3 °C, 2013 |
| Max 1hr Hum Fall | 5% | 17:21 | 6% | 8%, 2014 | 0%, 2009 |
| Max 10m Wind Speed | 10.9 mph | 13:44 | 11.3 mph | 23.2 mph, 2013 | 7.2 mph, 2009 |
| Minimum Feels-like | 2.9 °C | 23:21 | 2.4 °C | 10.8 °C, 2014 | -6.8 °C, 2010 |
| Maximum Feels-like | 14.6 °C | 15:27 | 10.7 °C | 15.5 °C, 2012 | -1.0 °C, 2010 |
| Mean Feels-like | 8.2 °C | 6.8 °C | 12.4 °C, 2012 | -3.5 °C, 2010 | |
| Air-frost Hrs | 0 hrs | 0 hrs | 13 hrs, 2009 | 0 hrs, 2011 | |
| Measure | Value (anomaly) | Month cumul. | Record High | Record Low | |
| Temperature Range | 6.6 °C (+2.2) | 4.6 °C (-0.2) | 7.7 °C (+3.3), 2009 | 2.0 °C (-2.4), 2014 | |
| Humidity Range | 8% | 16% | 27%, 2015 | 0%, 2009 | |
| Pressure Range | 11 hPa | 10 hPa | 34 hPa, 2013 | 2 hPa, 2009 | |
| Measure | Value [% of max] | Month cumul. | Record High | Record Low | |
| Sun Hours | 0 [0%] | 48 hrs (133%) [29%] | 5.3 [76%], 2015 | 0 [0%], 2010 | |
| Wet Hours | 8 [Mean rain rate: 0.6 mm/h] | 62 hrs (135%) [11%] | 13, 2013 | 0, 2010 | |
| Cloud Cover | Overcast | ||||
| Events | None | ||||
| Comments | am, eve Rain | ||||
| Extra Comments | |||||
| Issues | None known | ||||
| Observer Absent? | Yes - observations may be unreliable | ||||
| Pond Temperature (Heath) | 0.0 °C | ||||
- Notes
- Times of extremes are computed using the midpoint of the longest continuous period at that extreme value.
Cumulative anomalies are reported according to the expected value for the month-to-date rather than month-end.
Sun hrs, Wet hrs, Cloud cover and Events are based on manual equipment/observations (entered with a delay of 1-10 days); their reliablity is questionable and they are provided for interest only.
Daily Graph of Conditions
Webcam Summary of Cloud Conditions
Full resolution individual images at up-to 5 minute intervals