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Daily Report for 4th July 2015

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MeasureValue (anomaly)TimeMonth cumul.Record HighRecord Low
Minimum Temperature17.6 °C (+4.2)05:3316.5 °C (+3.1)17.6 °C (+4.2), 201510.6 °C (-2.8), 2019
Maximum Temperature26.6 °C (+4.1)16:4728.3 °C (+5.9)28.3 °C (+5.8), 202619.1 °C (-3.4), 2023
Mean Temperature21.8 °C (+4.1)22.5 °C (+4.5)21.9 °C, 202615.3 °C, 2023
Minimum Humidity40%17:0937%79%, 202027%, 2025
Maximum Humidity91%05:5779%96%, 201266%, 2011
Mean Humidity65%58%86%, 202047%, 2011
Minimum Pressure1013 hPa04:001013 hPa1025 hPa, 20261003 hPa, 2014
Maximum Pressure1020 hPa21:471021 hPa1030 hPa, 20251012 hPa, 2024
Mean Pressure1017 hPa1017 hPa1027 hPa, 20261008 hPa, 2014
Mean Wind Speed5.6 mph (+1.3)5.0 mph (+0.8)9.3 mph, 20201.5 mph, 2019
Maximum Wind Speed14.7 mph14:5513.4 mph17.6 mph, 20167.1 mph, 2019
Maximum Gust19.2 mph11:5519.0 mph30.0 mph, 202010.4 mph, 2019
Mean Wind Directionn/aSSENW, 2026NE, 2019
Rainfall4.8 mm4.9 mm (83%)9.5 mm, 20120.0 mm, 2009
Maximum Hourly Rain2.4 mm01:430.6 mm3.1 mm, 20230.5 mm, 2021
Maximum 10-min Rain2.3 mm01:410.6 mm2.3 mm, 20150.3 mm, 2020
Maximum Rain Rate72 mm/h00:2018 mm/h72 mm/h, 20151.0 mm/h, 2020
Minimum Dew Point8.3 °C20:499.7 °C14.5 °C, 20125.9 °C, 2014
Maximum Dew Point18.4 °C09:0115.9 °C18.4 °C, 20159.8 °C, 2011
Mean Dew Point14.2 °C13.0 °C15.7 °C, 20128.1 °C, 2011
MeasureValueTimeMonth cumul.Record HighRecord Low
Night Minimum (21-09)17.6 °C05:3316.9 °C17.6 °C, 201510.6 °C, 2019
Day Maximum (09-21)26.6 °C16:4728.3 °C28.3 °C, 202619.1 °C, 2023
Max 10m Temp Rise0.4 °C07:080.7 °C1.0 °C, 20090.4 °C, 2015
Max 1hr Temp Rise1.9 °C09:502.5 °C3.7 °C, 20251.5 °C, 2023
Max 1hr Hum Rise14%01:0411%19%, 20185%, 2012
Max 10m Temp Fall0.6 °C19:520.6 °C0.9 °C, 20220.3 °C, 2012
Max 1hr Temp Fall2.2 °C20:382.2 °C2.5 °C, 20140.8 °C, 2012
Max 1hr Hum Fall20%10:1313%20%, 20156%, 2020
Max 10m Wind Speed10.5 mph15:5110.4 mph14.5 mph, 20164.8 mph, 2019
Minimum Feels-like19.8 °C23:5718.2 °C19.9 °C, 201211.3 °C, 2019
Maximum Feels-like30.1 °C13:4131.3 °C33.1 °C, 202621.3 °C, 2023
Mean Feels-like25.4 °C25.4 °C25.7 °C, 202617.5 °C, 2023
Air-frost Hrs0 hrs0 hrs0 hrs, 20090 hrs, 2009
Minimum PM2.5n/a0.0 µg/m31.3 µg/m3, 20260.0 µg/m3, 2009
Maximum PM2.5n/a0.0 µg/m310.8 µg/m3, 202610.8 µg/m3, 2026
Mean PM2.5n/a0.0 µg/m34.1 µg/m3, 20264.1 µg/m3, 2026
MeasureValue (anomaly)Month cumul.Record HighRecord Low
Temperature Range9.0 °C (-0.1)11.8 °C16.0 °C, 20195.0 °C, 2020
Humidity Range51%42%55%, 201914%, 2020
Pressure Range7 hPa8 hPa11 hPa, 20142 hPa, 2009
ObservationDetail
Sun Hours12 hrs [80%]
Wet Hours1.5 hrs
Cloud Coveram: Partly Cloudy transitioned to Mostly Sunny
pm: Sunny
EventsLight Thunderstorm
Comments00-01 T-storm w H Shs
Observer Absent?Yes - observations may be unreliable
Pond Temperature0.0 °C
Notes
Detailed daily weather report for Hampstead, NW3, London on 4th July 2015. Times of extremes use the midpoint of the longest continuous period at that value. Cumulative anomalies are relative to the expected value for the month-to-date. Sun and wet hours are derived from webcam/rainfall analysis and may be adjusted. Data should be viewed with appropriate caution.

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