Detailed Relative Humidity Data
| Current | |
| Measure | Value |
| Relative Humidity | 90% |
| Humidity Trend | -2% /hr |
| 24hr Mean Humidity | 71% |
| Wet-Bulb Temperature | 6.6 °C |
| Absolute Humidity | 7.16 gm-3 |
| Air Density | 1248.62 gm-3 |
| Recent Averages and Extremes | ||
| Measure | Today | Yesterday |
| Minimum | 70% 00:09 |
48% 14:03 |
| Maximum | 93% 09:06 |
93% 06:42 |
| Mean | 87% |
71% |
| Averages, Extremes and Records | ||||||||
| Current | Station Lifetime (09-24) | |||||||
| Measure | 7-day | Month | 31-day | Year | 365-day | Overall | April | 27th Apr |
| Lowest Min |
48% 26th |
44% 14th |
44% 14th |
44% 14th Apr |
34% 16th Jun |
20% 9th Jun 2021 |
23% Day 23, 2021 |
31% 2021 |
| Highest Max |
93% Today |
95% 3rd |
96% 30th |
99% 8th Feb |
99% 8th Feb |
99% 21st Oct 2022 |
98% Day 29, 2012 |
95% 2023 |
| Highest Min |
70% Today |
72% 11th |
80% 31st |
92% 10th Mar |
93% 3rd Dec |
98% 23rd Dec 2009 |
94% Day 17, 2009 |
78% 2018 |
| Lowest Max |
85% 21st |
82% 7th |
82% 20th |
82% 7th Apr |
78% 17th Jun |
56% 20th Jul 2010 |
66% Day 21, 2011 |
77% 2017 |
| Lowest Mean |
71% 24th |
67% 14th |
67% 14th |
67% 14th Apr |
56% 16th Jun |
39% 2nd May 2013 |
48% Day 21, 2011 |
53% 2015 |
| Highest Mean |
87% Today |
87% Today |
88% 31st |
94% 8th Feb |
95% 12th Oct |
98% 23rd Dec 2009 |
96% Day 11, 2009 |
87% Today |
| Averages | ||||||||
| Mean | 77% | 78% | 78% | 83% | 82% | 77% | 69% | 70% |
| Mean Minimum |
61% | 60% | 61% | 71% | 68% | 61% | 50% | 51% |
| Mean Maximum |
90% | 90% | 90% | 92% | 92% | 89% | 86% | 86% |
| Past Year Monthly Averages and Extremes (April 2023 - March 2024) | ||||||||||||
| Extremes | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Jan | Feb | Mar |
| Lowest Min |
36% 20th |
38% 28th |
34% 16th |
37% 7th |
41% 23rd |
38% 4th |
56% 8th |
61% 24th |
68% 21st |
60% 26th |
64% 12th |
47% 30th |
| Highest Max |
97% 22nd |
95% 9th |
95% 20th |
96% 23rd |
98% 9th |
98% 15th |
98% 18th |
99% 13th |
98% 3rd |
96% 1st |
99% 8th |
97% 4th |
| Highest Min |
80% 1st |
85% 13th |
69% 6th |
83% 27th |
82% 5th |
80% 17th |
93% 12th |
91% 27th |
93% 2nd |
87% 5th |
91% 14th |
92% 10th |
| Lowest Max |
82% 26th |
82% 22nd |
78% 17th |
83% 2nd |
83% 25th |
87% 24th |
86% 5th |
83% 24th |
87% 23rd |
83% 9th |
85% 5th |
85% 23rd |
| Lowest Mean |
69% 13th |
66% 28th |
56% 16th |
60% 7th |
68% 25th |
68% 9th |
77% 17th |
73% 24th |
80% 21st |
76% 10th |
80% 1st |
72% 24th |
| Highest Mean |
88% 1st |
90% 6th |
80% 20th |
90% 27th |
90% 2nd |
89% 1st |
95% 12th |
95% 12th |
95% 3rd |
91% 5th |
94% 8th |
94% 10th |
| Averages | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Jan | Feb | Mar |
| Mean | 78% | 77% | 71% | 75% | 79% | 80% | 87% | 89% | 89% | 84% | 88% | 84% |
| Mean Minimum |
57% | 61% | 52% | 58% | 61% | 61% | 75% | 80% | 83% | 76% | 78% | 70% |
| Mean Maximum |
92% | 90% | 87% | 91% | 93% | 94% | 95% | 95% | 95% | 91% | 94% | 93% |
| Past Year Seasonal Averages | |||
| Season | Daily Min | Daily Max | Mean |
| Winter 23/24 | 79% |
93% |
87% |
| Spring 2023 | 63% |
92% |
80% |
| Summer 2023 | 57% |
90% |
75% |
| Autumn 2023 | 72% |
94% |
85% |
View daily tables of
min /
max /
mean
Humidity data for the past year
View monthly tables of
min /
max /
mean
Humidity data for all months in the station history.
Latest charts and graphs of Humidity
Past 24hrs and past 12 months trends for Humidity
Current year vs last year daily trends for Humidity
This year min/max daily trends in detail for Humidity
| Record Period Averages | ||||||
| Measure | 7-day | Month | April | 31-day | Year | 365-day |
| Least Humid |
50% Ending 9th May 2016 |
60% May 2011 |
60% 2017 |
58% Ending 6th May 2011 |
73% 2016 |
71% Ending 17th Jul 2017 |
| Most Humid |
96% Ending 27th Nov 2014 |
92% Dec 2009 |
78% Current |
93% Ending 20th Jan 2010 |
83% 2024 |
82% Ending 12th Apr 2024 |
| Lowest Mean Daily-Min |
32% Ending 19th Jul 2013 |
40% May 2020 |
44% 2015 |
37% Ending 21st Jul 2018 |
57% 2015 |
56% Ending 11th Jul 2015 |
| Highest Mean Daily-Min |
92% Ending 27th Nov 2014 |
84% Dec 2009 |
62% 2018 |
86% Ending 20th Jan 2010 |
71% 2024 |
68% Ending 12th Apr 2024 |
| Lowest Mean Daily-Max |
73% Ending 25th Apr 2017 |
76% Apr 2017 |
76% 2017 |
76% Ending 30th Apr 2017 |
85% 2016 |
82% Ending 2nd Sep 2017 |
| Highest Mean Daily-Max |
98% Ending 17th Jan 2010 |
97% Dec 2009 |
92% 2023 |
97% Ending 28th Dec 2009 |
92% 2023 |
92% Ending 4th Apr 2024 |
Ranked Historical Humidity Data
| Most Humid Days | |||
| Rank | Min | Max | Mean |
| 1 | 98% 23rd Dec 2009 |
99% 21st Oct 2022 |
98% 23rd Dec 2009 |
| 2 | 98% 24th Dec 2009 |
99% 9th Mar 2023 |
98% 24th Dec 2009 |
| 3 | 98% 30th Dec 2009 |
99% 13th Nov 2023 |
98% 30th Dec 2009 |
| 4 | 98% 14th Jan 2010 |
99% 8th Feb 2024 |
98% 14th Jan 2010 |
| 5 | 98% 15th Jan 2010 |
98% 6th Feb 2009 |
98% 15th Jan 2010 |
| 6 | 98% 29th Dec 2010 |
98% 9th Feb 2009 |
98% 29th Dec 2010 |
| 7 | 98% 22nd Oct 2012 |
98% 10th Feb 2009 |
98% 30th Dec 2010 |
| 8 | 98% 23rd Oct 2012 |
98% 13th Feb 2009 |
98% 20th Nov 2011 |
| 9 | 98% 11th Feb 2013 |
98% 7th Aug 2009 |
98% 21st Nov 2011 |
| 10 | 98% 8th Mar 2013 |
98% 8th Aug 2009 |
98% 22nd Oct 2012 |
| Least Humid Days | |||
| Rank | Min | Max | Mean |
| 1 | 20% 9th Jun 2021 |
56% 20th Jul 2010 |
39% 2nd May 2013 |
| 2 | 20% 19th Jul 2022 |
56% 2nd May 2013 |
41% 5th May 2016 |
| 3 | 21% 25th Mar 2017 |
61% 28th Mar 2012 |
41% 15th Jul 2013 |
| 4 | 22% 15th Jul 2013 |
62% 6th Jan 2009 |
43% 20th Jul 2010 |
| 5 | 22% 18th Jul 2016 |
63% 21st Feb 2013 |
43% 28th Mar 2012 |
| 6 | 23% 23rd Apr 2021 |
63% 2nd Jul 2018 |
43% 2nd Jul 2018 |
| 7 | 23% 18th Jul 2022 |
64% 31st Jan 2009 |
44% 10th Jul 2015 |
| 8 | 24% 8th Sep 2012 |
65% 2nd Feb 2012 |
44% 19th Jul 2022 |
| 9 | 24% 30th Jun 2015 |
65% 27th May 2013 |
44% 1st Jul 2015 |
| 10 | 24% 10th Jul 2015 |
65% 1st Jul 2015 |
45% 17th Jul 2013 |
| Most Humid Months | |||
| Rank | Min | Max | Mean |
| 1 | 84% Dec 2009 |
97% Dec 2009 |
92% Dec 2009 |
| 2 | 84% Dec 2022 |
96% Nov 2014 |
90% Nov 2014 |
| 3 | 84% Dec 2020 |
96% Feb 2010 |
90% Dec 2022 |
| 4 | 83% Dec 2023 |
96% Jan 2014 |
90% Jan 2010 |
| 5 | 82% Jan 2021 |
95% Jan 2010 |
90% Jan 2021 |
| 6 | 82% Nov 2022 |
95% Oct 2012 |
89% Nov 2023 |
| 7 | 82% Jan 2010 |
95% Nov 2011 |
89% Dec 2020 |
| 8 | 81% Dec 2021 |
95% Oct 2022 |
89% Nov 2022 |
| 9 | 81% Nov 2014 |
95% Nov 2019 |
89% Dec 2023 |
| 10 | 80% Dec 2010 |
95% Nov 2019 |
89% Nov 2019 |
| Least Humid Months | |||
| Rank | Min | Max | Mean |
| 1 | 40% May 2020 |
76% Apr 2017 |
60% May 2011 |
| 2 | 41% Jul 2018 |
79% Jun 2017 |
60% Apr 2017 |
| 3 | 42% Jul 2013 |
80% May 2011 |
61% Jun 2015 |
| 4 | 42% May 2011 |
80% Apr 2011 |
61% Jul 2013 |
| 5 | 42% Jun 2015 |
80% Apr 2011 |
62% Apr 2011 |
| 6 | 43% Jul 2014 |
80% Jun 2015 |
62% May 2020 |
| 7 | 43% Jul 2015 |
80% Jul 2017 |
62% Jul 2018 |
| 8 | 44% Jun 2014 |
81% Jul 2010 |
63% Jul 2015 |
| 9 | 44% Apr 2015 |
82% Jul 2015 |
63% Jul 2010 |
| 10 | 44% May 2015 |
82% Dec 2016 |
63% Jun 2017 |
| Most Humid Days in April | |||
| Rank | Min | Max | Mean |
| 1 | 94% Day 17, 2009 |
98% Day 29, 2012 |
96% Day 11, 2009 |
| 2 | 93% Day 11, 2009 |
98% Day 11, 2013 |
96% Day 17, 2009 |
| 3 | 93% Day 9, 2018 |
98% Day 14, 2013 |
95% Day 9, 2018 |
| 4 | 92% Day 12, 2009 |
98% Day 21, 2014 |
95% Day 12, 2009 |
| 5 | 91% Day 12, 2018 |
97% Day 11, 2009 |
95% Day 12, 2018 |
| Least Humid Days in April | |||
| Rank | Min | Max | Mean |
| 1 | 23% Day 23, 2021 |
66% Day 21, 2011 |
48% Day 21, 2011 |
| 2 | 25% Day 19, 2018 |
66% Day 17, 2014 |
48% Day 15, 2015 |
| 3 | 25% Day 5, 2020 |
67% Day 25, 2017 |
48% Day 25, 2017 |
| 4 | 26% Day 19, 2011 |
68% Day 23, 2017 |
50% Day 22, 2011 |
| 5 | 27% Day 15, 2015 |
69% Day 11, 2017 |
51% Day 19, 2017 |
Notes:
- Valid humidity records began in February 2009
- All figures, unless specified, relate to the period midnight-midnight, this being when daily extremes are reset
- 98% is the physical limit of the hygrometer (measuring RH); in reality this tends to means 100% saturation of the air. This value is achieved fairly frequently, any record with this value is just the first instance it occurred in the relevant timeframe.
The different measures of humidity:
The Dew Point (or frost point if the temperature is < 0.0 °C
is the saturation temperature of a parcel of air, i.e. the point at which water condenses out.
It is the temperature at which an object would need to be
for dew to form on it (dew forms because certain objects - like cars - cool more rapidly than the air, enabling them to
reach the dew point). It is directly proportional to the specific humidity, and very well correlated to the absolute humidity.
In everyday terms, high dew points are more uncomfortable as sweating is less effective.
Relative Humidity, on the other hand, is rather more abstract and has a very technical definition:
the ratio of the partial pressure of water vapour in the air to the saturated vapour pressure of that water.
The saturated vapour pressure is proportional to the air temperature, and the partial pressure indicates how much water vapour the air contains,
so at a given temperature, the RH is entirely dependent on this partial pressure, making the RH useful in determining the extent to which the air is water-saturated.
For example: When it rains the relative humidity will increase, but the dew point may not, as the temperature will usually fall as well.
If the dew point is the same when the RH increases, the air has the same amount of water but it is cooler,
so it is more saturated, as less water vapour can exist in cooler air.
Simply and concisely: Dew point is a rough measure of how much water vapour is physically in the air;
relative humidity is just a measure of the degree to which the air is full of water vapour (i.e. its saturation).
One is an absolute measure, the other is relative.