Daily Report for 28th February 2016
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| Measure | Value (anomaly) | Time | Month cumul. | Record High | Record Low |
| Minimum Temperature | 1.9 °C (-0.7) | 05:29 | 3.2 °C (+0.9) | 10.0 °C (+7.4), 2012 | -5.4 °C (-8.0), 2018 |
| Maximum Temperature | 7.4 °C (-1.4) | 14:31 | 8.6 °C (+1.0) | 14.2 °C (+5.4), 2012 | -1.8 °C (-10.6), 2018 |
| Mean Temperature | 4.3 °C (-1.0) | 6.0 °C (+1.0) | 11.4 °C, 2012 | -4.1 °C, 2018 | |
| Minimum Humidity | 42% | 14:22 | 58% | 84%, 2011 | 42%, 2016 |
| Maximum Humidity | 76% | 06:47 | 86% | 98%, 2010 | 76%, 2016 |
| Mean Humidity | 63% | 74% | 90%, 2010 | 63%, 2016 | |
| Minimum Pressure | 1015 hPa | 00:59 | 1004 hPa | 1027 hPa, 2013 | 979 hPa, 2010 |
| Maximum Pressure | 1026 hPa | 22:40 | 1014 hPa | 1035 hPa, 2011 | 993 hPa, 2017 |
| Mean Pressure | 1020 hPa | 1009 hPa | 1030 hPa, 2011 | 988 hPa, 2017 | |
| Mean Wind Speed | 5.6 mph (+0.5) | 6.2 mph (+1.1) | 9.4 mph, 2015 | 4.3 mph, 2012 | |
| Maximum Wind Speed | 13.8 mph | 12:31 | 15.3 mph | 18.5 mph, 2015 | 8.7 mph, 2012 |
| Maximum Gust | 21.0 mph | 12:31 | 22.9 mph | 30.0 mph, 2018 | 10.9 mph, 2012 |
| Mean Wind Direction | NE | ||||
| Rainfall | 0.0 mm | 38.5 mm (100%) | 12.6 mm, 2010 | ||
| Maximum Hourly Rain | n/a | 3.3, 2010 | |||
| Maximum 10-min Rain | n/a | 0.8, 2010 | |||
| Maximum Rain Rate | n/a | 6, 2010 | |||
| Minimum Dew Point | -5.0 °C | 14:15 | -1.4 °C | 7.6 °C, 2012 | -9.3 °C, 2018 |
| Maximum Dew Point | 0.5 °C | 10:52 | 4.6 °C | 10.0 °C, 2012 | -5.0 °C, 2018 |
| Mean Dew Point | -2.4 °C | 1.6 °C | 8.7 °C, 2012 | -6.8 °C, 2018 | |
| Measure | Value | Time | Month cumul. | Record High | Record Low |
| Night Minimum (21-09) | 1.9 °C | 05:29 | 4.0 °C | 10.0 °C, 2012 | -4.9 °C, 2018 |
| Day Maximum (09-21) | 7.4 °C | 14:31 | 8.5 °C | 14.2 °C, 2012 | -1.8 °C, 2018 |
| Max 10m Temp Rise | 0.4 °C | 12:00 | 0.4 °C | 0.6 °C, 2018 | 0.2 °C, 2010 |
| Max 1hr Temp Rise | 1.4 °C | 10:54 | 1.3 °C | 1.9 °C, 2018 | 0.5 °C, 2011 |
| Max 1hr Hum Rise | 6% | 19:17 | 7% | 21%, 2018 | 4%, 2010 |
| Max 10m Temp Fall | 0.3 °C | 14:46 | 0.4 °C | 0.8 °C, 2018 | 0.1 °C, 2015 |
| Max 1hr Temp Fall | 1.1 °C | 18:26 | 1.2 °C | 2.1 °C, 2018 | 0.4 °C, 2015 |
| Max 1hr Hum Fall | 14% | 12:55 | 10% | 24%, 2018 | 4%, 2015 |
| Max 10m Wind Speed | 11.4 mph | 11:10 | 11.9 mph | 14.3 mph, 2018 | 6.8 mph, 2012 |
| Minimum Feels-like | -2.9 °C | 05:53 | -0.2 °C | 8.5 °C, 2012 | -14.6 °C, 2018 |
| Maximum Feels-like | 5.3 °C | 12:47 | 7.6 °C | 15.5 °C, 2012 | -4.3 °C, 2018 |
| Mean Feels-like | 1.1 °C | 3.9 °C | 12.0 °C, 2012 | -9.6 °C, 2018 | |
| Air-frost Hrs | 0 hrs | 0.9 hrs | 24 hrs, 2018 | 0 hrs, 2009 | |
| Measure | Value (anomaly) | Month cumul. | Record High | Record Low | |
| Temperature Range | 5.5 °C (-0.7) | 5.4 °C (+0.1) | 6.7 °C (+0.5), 2013 | 1.7 °C (-4.5), 2011 | |
| Humidity Range | 34% | 28% | 34%, 2016 | 6%, 2011 | |
| Pressure Range | 11 hPa | 10 hPa | 25 hPa, 2010 | 3 hPa, 2012 | |
| Measure | Value [% of max] | Month cumul. | Record High | Record Low | |
| Sun Hours | 1.3 [13%] | 75 hrs (99%) [30%] | 4 [41%], 2018 | 0 [0%], 2011 | |
| Wet Hours | 0 | 51 hrs (102%) [7.6%] | 11, 2010 | , 2009 | |
| Cloud Cover | am: Overcast pm: Partly Cloudy | ||||
| Events | None | ||||
| Comments | - | ||||
| Extra Comments | |||||
| Issues | Wind data from Harpenden | ||||
| 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
Large resolution version