Daily Report for 29th June 2013

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 12.8 °C (-0.2) 07:07 10.9 °C (-1.1) 19.1 °C (+6.1), 2025 10.0 °C (-3.0), 2014
Maximum Temperature 21.4 °C (-0.7) 18:07 19.1 °C (-1.8) 33.6 °C (+11.5), 2019 16.8 °C (-5.3), 2016
Mean Temperature 17.2 °C (-0.4) 15.0 °C (-1.5) 24.4 °C, 2025 14.5 °C, 2014
Minimum Humidity 37% 17:34 50% 71%, 2021 30%, 2019
Maximum Humidity 83% 00:01 84% 96%, 2009 74%, 2010
Mean Humidity 59% 68% 87%, 2021 53%, 2010
Minimum Pressure 1019 hPa 01:30 1016 hPa 1024 hPa, 2025 994 hPa, 2017
Maximum Pressure 1025 hPa 16:45 1021 hPa 1028 hPa, 2025 999 hPa, 2017
Mean Pressure 1023 hPa 1018 hPa 1026 hPa, 2025 996 hPa, 2017
Mean Wind Speed 3.7 mph (-0.7) 4.9 mph (+0.5) 11.2 mph, 2016 2.9 mph, 2014
Maximum Wind Speed 10.5 mph 06:50 12.3 mph 23.1 mph, 2016 8.8 mph, 2017
Maximum Gust 14.7 mph 06:22 18.7 mph 38.7 mph, 2016 13.6 mph, 2017
Mean Wind Direction NNW
Rainfall 0.0 mm 15.6 mm (34%) 8.4 mm, 2023
Maximum Hourly Rain n/a 4.1, 2023
Maximum 10-min Rain n/a 1.7, 2023
Maximum Rain Rate n/a 14.4, 2023
Minimum Dew Point 5.8 °C 17:34 6.3 °C 15.2 °C, 2025 4.9 °C, 2011
Maximum Dew Point 13.9 °C 00:01 11.3 °C 19.8 °C, 2019 10.3 °C, 2020
Mean Dew Point 8.7 °C 8.7 °C 16.8 °C, 2025 6.6 °C, 2011
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 12.8 °C 07:07 10.9 °C 19.1 °C, 2025 10.4 °C, 2011
Day Maximum (09-21) 21.4 °C 18:07 19.1 °C 33.6 °C, 2019 16.8 °C, 2016
Max 10m Temp Rise 0.5 °C 09:25 0.6 °C 0.9 °C, 2020 0.4 °C, 2017
Max 1hr Temp Rise 1.8 °C 09:59 2.1 °C 3.3 °C, 2019 1.3 °C, 2021
Max 1hr Hum Rise 8% 23:52 10% 16%, 2018 4%, 2011
Max 10m Temp Fall 0.4 °C 18:46 0.5 °C 0.9 °C, 2014 0.2 °C, 2017
Max 1hr Temp Fall 1.6 °C 23:11 1.8 °C 3.0 °C, 2018 0.7 °C, 2017
Max 1hr Hum Fall 12% 06:23 11% 19%, 2012 6%, 2017
Max 10m Wind Speed 8.0 mph 05:30 9.1 mph 18.9 mph, 2016 0.0 mph, 2024
Minimum Feels-like 12.8 °C 06:42 10.6 °C 23.2 °C, 2025 10.2 °C, 2014
Maximum Feels-like 21.8 °C 16:23 20.4 °C 39.0 °C, 2019 19.1 °C, 2016
Mean Feels-like 17.9 °C 16.0 °C 29.6 °C, 2025 15.6 °C, 2014
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 8.6 °C (-0.5) 8.2 °C (-0.7) 19.7 °C (+10.6), 2019 4.1 °C (-5.0), 2021
Humidity Range 46% 34% 64%, 2019 18%, 2016
Pressure Range 6 hPa 5 hPa 11 hPa, 2019 2 hPa, 2020
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 7 [46%]124 hrs (66%) [29%] 14 [93%], 2019 0 [0%], 2021
Wet Hours 023 hrs (64%) [3.3%] 7, 2023 0, 2009
Cloud Cover am: Mostly Cloudy
pm: Mostly Sunny with periods of Partly Cloudy
Events None
Comments data is awaiting quality control from site operator
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature @ Hampstead Heath 0.0 °C
Notes
Detailed daily weather report for Hampstead nw3 in London on 29th June 2013.
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 are derived based on analysis of webcam observations, but may use data from our closest site, Heathrow, when needed.
Wet hrs are dervied algorithmically from rainfall data, though may be adjusted manually.
Rainfall totals may be manually adjusted after the fact to correct delayed or erroneous data.
Cloud cover and Events are manually reported, often with multi-week delays.
Data is generally reliable and accurate but should always be viewed with some quantity of salt to hand.
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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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Wind rose