Measure | Value (anomaly) | Time |
Month cumul. | Record High | Record Low |
Minimum Temperature |
0.4 °C (-3.7) |
06:31 |
2.0 °C (-1.8) |
11.0 °C (+6.9), 2017 |
-2.4 °C (-6.5), 2023 |
Maximum Temperature |
9.9 °C (-0.6) |
15:09 |
8.6 °C (-1.5) |
16.9 °C (+6.4), 2017 |
0.6 °C (-9.9), 2013 |
Mean Temperature |
5.2 °C (-2.1) |
|
5.4 °C (-1.7) |
13.4 °C, 2017 |
-0.8 °C, 2013 |
Minimum Humidity |
58% |
16:32 |
60% |
89%, 2024 |
46%, 2015 |
Maximum Humidity |
94% |
07:49 |
89% |
97%, 2009 |
79%, 2013 |
Mean Humidity |
79% |
|
77% |
93%, 2024 |
66%, 2019 |
Minimum Pressure |
1026 hPa |
00:10 |
1001 hPa |
1034 hPa, 2012 |
988 hPa, 2018 |
Maximum Pressure |
1030 hPa |
22:40 |
1012 hPa |
1038 hPa, 2012 |
997 hPa, 2018 |
Mean Pressure |
1028 hPa |
|
1006 hPa |
1036 hPa, 2012 |
992 hPa, 2018 |
Mean Wind Speed |
1.4 mph (-3.8) |
|
5.1 mph (-0.1) |
15.1 mph, 2021 |
1.4 mph, 2016 |
Maximum Wind Speed |
6.7 mph |
16:57 |
11.9 mph |
29.5 mph, 2020 |
6.7 mph, 2016 |
Maximum Gust |
12.0 mph |
16:28 |
19.5 mph |
45.6 mph, 2021 |
8.7 mph, 2012 |
Mean Wind Direction |
E |
|
|
|
|
Rainfall |
0.0 mm |
|
26.7 mm (193%) |
3.6 mm, 2022 |
|
Maximum Hourly Rain |
n/a |
|
|
2.4, 2018 |
|
Maximum 10-min Rain |
n/a |
|
|
2, 2018 |
|
Maximum Rain Rate |
n/a |
|
|
40, 2018 |
|
Minimum Dew Point |
-0.7 °C |
06:31 |
-1.8 °C |
6.5 °C, 2017 |
-9.0 °C, 2013 |
Maximum Dew Point |
5.0 °C |
11:37 |
4.9 °C |
11.0 °C, 2017 |
-2.6 °C, 2013 |
Mean Dew Point |
1.7 °C |
|
1.4 °C |
9.0 °C, 2017 |
-6.0 °C, 2013 |
Measure | Value | Time |
Month cumul. | Record High | Record Low |
Night Minimum (21-09) |
0.4 °C |
06:31 |
2.5 °C |
11.0 °C, 2017 |
-2.4 °C, 2023 |
Day Maximum (09-21) |
9.9 °C |
15:09 |
8.4 °C |
16.9 °C, 2017 |
0.2 °C, 2013 |
Max 10m Temp Rise |
0.6 °C |
08:04 |
0.4 °C |
1.1 °C, 2011 |
0.2 °C, 2014 |
Max 1hr Temp Rise |
2.4 °C |
08:41 |
1.6 °C |
2.8 °C, 2012 |
0.3 °C, 2024 |
Max 1hr Hum Rise |
5% |
18:26 |
8% |
17%, 2023 |
2%, 2024 |
Max 10m Temp Fall |
0.3 °C |
18:14 |
0.5 °C |
1.0 °C, 2020 |
0.1 °C, 2024 |
Max 1hr Temp Fall |
1.2 °C |
19:07 |
1.6 °C |
2.3 °C, 2012 |
0.3 °C, 2024 |
Max 1hr Hum Fall |
8% |
11:43 |
10% |
15%, 2023 |
2%, 2024 |
Max 10m Wind Speed |
3.8 mph |
17:02 |
8.9 mph |
21.6 mph, 2021 |
3.8 mph, 2016 |
Minimum Feels-like |
-2.0 °C |
06:23 |
-1.9 °C |
11.4 °C, 2017 |
-11.0 °C, 2013 |
Maximum Feels-like |
9.9 °C |
14:50 |
7.6 °C |
18.7 °C, 2017 |
-3.9 °C, 2013 |
Mean Feels-like |
4.7 °C |
|
2.8 °C |
14.2 °C, 2017 |
-7.6 °C, 2013 |
Air-frost Hrs |
0 hrs |
|
0.6 hrs |
20 hrs, 2013 |
0 hrs, 2009 |
Measure | Value (anomaly) |
Month cumul. | Record High | Record Low |
Temperature Range |
9.5 °C (+3.0) |
6.6 °C (+0.2) |
11.9 °C (+5.4), 2009 |
1.1 °C (-5.3), 2024 |
Humidity Range |
36% |
29% |
40%, 2009 |
7%, 2024 |
Pressure Range |
4 hPa |
12 hPa |
16 hPa, 2021 |
1 hPa, 2013 |
Measure | Value [% of max] |
Month cumul. | Record High | Record Low |
Sun Hours |
9 [86%] | 36 hrs (95%) [32%] |
9 [86%], 2016 |
0 [0%], 2022 |
Wet Hours |
0 | 27 hrs (144%) [10%] |
5, 2022 |
, 2009 |
Cloud Cover |
Sunny with periods of Hazy |
Events |
None |
Comments |
- |
Extra Comments |
|
Issues |
Wind data from Tottenham (TODO: calibration) |
Observer Absent? |
Yes - observations may be unreliable |
Pond Temperature @ Hampstead Heath |
0.0 °C |