Daily Report for 23rd January 2019
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| Measure | Value (anomaly) | Time | Month cumul. | Record High | Record Low |
| Minimum Temperature | -2.2 °C (-4.5) | 23:11 | 2.6 °C (+0.2) | 8.2 °C (+5.9), 2018 | -4.1 °C (-6.4), 2015 |
| Maximum Temperature | 1.8 °C (-5.2) | 15:15 | 7.0 °C (-0.0) | 12.7 °C (+5.7), 2018 | 1.8 °C (-5.2), 2019 |
| Mean Temperature | 0.1 °C (-4.8) | 5.0 °C (+0.1) | 10.6 °C, 2018 | 0.1 °C, 2019 | |
| Minimum Humidity | 86% | 15:07 | 74% | 88%, 2010 | 49%, 2009 |
| Maximum Humidity | 94% | 21:56 | 89% | 98%, 2010 | 83%, 2012 |
| Mean Humidity | 90% | 83% | 95%, 2010 | 71%, 2009 | |
| Minimum Pressure | 997 hPa | 03:03 | 1021 hPa | 1033 hPa, 2011 | 967 hPa, 2009 |
| Maximum Pressure | 1010 hPa | 23:58 | 1028 hPa | 1035 hPa, 2011 | 985 hPa, 2009 |
| Mean Pressure | 1003 hPa | 1024 hPa | 1034 hPa, 2011 | 976 hPa, 2009 | |
| Mean Wind Speed | 2.7 mph (-2.5) | 4.2 mph (-1.0) | 8.1 mph, 2018 | 0.2 mph, 2017 | |
| Maximum Wind Speed | 9.3 mph | 10:38 | 11.9 mph | 16.8 mph, 2018 | 3.7 mph, 2017 |
| Maximum Gust | 15.0 mph | 02:46 | 18.4 mph | 30.0 mph, 2018 | 4.2 mph, 2017 |
| Mean Wind Direction | N | ||||
| Rainfall | 0.0 mm | 11.5 mm (28%) | 11.0 mm, 2009 | ||
| Maximum Hourly Rain | n/a | 5, 2009 | |||
| Maximum 10-min Rain | n/a | 0.9, 2014 | |||
| Maximum Rain Rate | n/a | 6, 2014 | |||
| Minimum Dew Point | -3.2 °C | 23:08 | 0.1 °C | 5.0 °C, 2018 | -5.6 °C, 2015 |
| Maximum Dew Point | -0.1 °C | 15:13 | 4.2 °C | 11.1 °C, 2018 | -0.5 °C, 2013 |
| Mean Dew Point | -1.2 °C | 2.3 °C | 8.5 °C, 2018 | -1.3 °C, 2013 | |
| Measure | Value | Time | Month cumul. | Record High | Record Low |
| Night Minimum (21-09) | * 0.2 °C * | 03:56 | 3.4 °C | 7.7 °C, 2018 | -4.1 °C, 2015 |
| Day Maximum (09-21) | 1.8 °C | 15:18 | 6.8 °C | 12.7 °C, 2018 | 1.8 °C, 2019 |
| Max 10m Temp Rise | 0.2 °C | 20:38 | 0.3 °C | 0.5 °C, 2015 | 0.1 °C, 2010 |
| Max 1hr Temp Rise | 0.4 °C | 15:10 | 1.1 °C | 2.0 °C, 2015 | 0.1 °C, 2010 |
| Max 1hr Hum Rise | 3% | 17:34 | 4% | 7%, 2018 | 2%, 2010 |
| Max 10m Temp Fall | 0.4 °C | 16:54 | 0.4 °C | 0.4 °C, 2016 | 0.1 °C, 2011 |
| Max 1hr Temp Fall | 1.7 °C | 17:34 | 1.2 °C | 1.7 °C, 2019 | 0.4 °C, 2011 |
| Max 1hr Hum Fall | 2% | 01:17 | 6% | 21%, 2014 | 2%, 2017 |
| Max 10m Wind Speed | 7.4 mph | 11:41 | 8.7 mph | 12.7 mph, 2018 | 2.2 mph, 2017 |
| Minimum Feels-like | -5.3 °C | 02:46 | -0.7 °C | 4.9 °C, 2018 | -6.2 °C, 2015 |
| Maximum Feels-like | 1.7 °C | 14:49 | 6.7 °C | 14.3 °C, 2018 | 1.7 °C, 2019 |
| Mean Feels-like | -2.0 °C | 3.1 °C | 10.2 °C, 2018 | -2.3 °C, 2013 | |
| Air-frost Hrs | 7 hrs | 1 hrs | 11 hrs, 2015 | 0 hrs, 2010 | |
| Measure | Value (anomaly) | Month cumul. | Record High | Record Low | |
| Temperature Range | 4.0 °C (-0.7) | 4.4 °C (-0.2) | 11.4 °C (+6.7), 2015 | 1.4 °C (-3.3), 2013 | |
| Humidity Range | 8% | 15% | 44%, 2009 | 5%, 2017 | |
| Pressure Range | 13 hPa | 8 hPa | 18 hPa, 2009 | 2 hPa, 2011 | |
| Measure | Value [% of max] | Month cumul. | Record High | Record Low | |
| Sun Hours | 1.2 [15%] | 45 hrs (132%) [26%] | 6 [77%], 2015 | 0 [0%], 2011 | |
| Wet Hours | 0 | 13 hrs (27%) [2.4%] | 2, 2015 | , 2009 | |
| Cloud Cover | Partly Cloudy with periods of Mostly Cloudy | ||||
| Events | Lying Snow (at 09z): ~1 cm | ||||
| Comments | snow patches persisted | ||||
| Extra Comments | |||||
| Issues | snow melt reassigned | ||||
| Observer Absent? | Yes - observations may be unreliable | ||||
| Pond Temperature (Heath) | n/a | ||||
- 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