Detailed Dew Point Data
Current | |
Measure | Value |
Dew Point | 7.6 °C |
Dew Pt Trend | -0.3 °C /hr |
24hr Mean Dew Pt | 7.0 °C |
Wet-Bulb Temperature | 10.3 °C |
Absolute Humidity | 7.95 gm-3 |
Air Density | 1203.66 gm-3 |
Recent Averages and Extremes | ||
Measure | Today | Yesterday |
Minimum | 5.8 °C 05:13 |
2.8 °C 05:51 |
Maximum | 8.9 °C 11:59 |
7.8 °C 15:27 |
Mean | 7.0 °C |
5.9 °C |
Averages, Extremes and Records | ||||||||
Current | Station Lifetime (09-24) | |||||||
Measure | 7-day | Month | 31-day | Year | 365-day | Overall | March | 29th Mar |
Lowest Min |
1.5 °C 24th |
-1.1 °C 4th |
-1.1 °C 4th |
-7.5 °C 18th Jan |
-7.5 °C 18th Jan |
-11.5 °C 2nd Feb 2012 |
-10.3 °C Day 12, 2013 |
-7.5 °C 2013 |
Highest Max |
8.9 °C Today |
12.2 °C 17th |
12.2 °C 17th |
12.5 °C 15th Feb |
22.2 °C 10th Sep |
22.2 °C 10th Sep 2023 |
12.6 °C Day 31, 2011 |
11.6 °C 2023 |
Highest Min |
5.8 °C Today |
9.0 °C 20th |
9.0 °C 20th |
10.0 °C 14th Feb |
16.5 °C 10th Sep |
17.6 °C 12th Aug 2020 |
9.1 °C Day 17, 2023 |
7.7 °C 2017 |
Lowest Max |
4.4 °C 23rd |
4.4 °C 3rd |
4.4 °C 23rd |
-1.7 °C 18th Jan |
-1.7 °C 18th Jan |
-7.9 °C 2nd Feb 2012 |
-4.5 °C Day 26, 2013 |
-3.0 °C 2013 |
Lowest Mean |
2.6 °C 23rd |
1.8 °C 3rd |
1.8 °C 3rd |
-4.6 °C 18th Jan |
-4.6 °C 18th Jan |
-9.7 °C 2nd Feb 2012 |
-6.7 °C Day 12, 2013 |
-5.8 °C 2013 |
Highest Mean |
7.0 °C Today |
10.4 °C 17th |
10.4 °C 17th |
11.3 °C 15th Feb |
18.7 °C 10th Sep |
19.1 °C 12th Aug 2020 |
10.7 °C Day 20, 2010 |
9.7 °C 2023 |
Averages | ||||||||
Mean | 5.1 °C | 6.4 °C | 6.5 °C | 5.4 °C | 9.2 °C | 7.3 °C | 3.4 °C | 4.2 °C |
Mean Minimum |
3.2 °C | 4.3 °C | 4.3 °C | 3.1 °C | 6.8 °C | 4.7 °C | 0.8 °C | 1.2 °C |
Mean Maximum |
6.8 °C | 8.1 °C | 8.3 °C | 7.5 °C | 11.4 °C | 9.8 °C | 6.0 °C | 6.8 °C |
Past Year Monthly Averages and Extremes (March 2023 - February 2024) | ||||||||||||
Extremes | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Jan | Feb |
Lowest Min |
-4.0 °C 11th |
-1.8 °C 4th |
3.5 °C 28th |
3.0 °C 14th |
7.8 °C 26th |
8.7 °C 31st |
7.1 °C 23rd |
0.0 °C 16th |
-3.2 °C 30th |
-3.9 °C 2nd |
-7.5 °C 18th |
-1.0 °C 25th |
Highest Max |
11.7 °C 30th |
12.8 °C 28th |
14.0 °C 7th |
21.2 °C 12th |
19.8 °C 8th |
19.3 °C 11th |
22.2 °C 10th |
18.6 °C 1st |
13.9 °C 18th |
12.3 °C 24th |
11.8 °C 2nd |
12.5 °C 15th |
Highest Min |
9.1 °C 17th |
7.0 °C 28th |
10.4 °C 7th |
15.9 °C 28th |
14.8 °C 27th |
15.3 °C 18th |
16.5 °C 10th |
15.0 °C 2nd |
8.6 °C 13th |
9.0 °C 24th |
7.9 °C 29th |
10.0 °C 14th |
Lowest Max |
1.0 °C 5th |
3.2 °C 25th |
7.4 °C 3rd |
10.1 °C 2nd |
11.6 °C 2nd |
13.3 °C 6th |
11.2 °C 23rd |
4.9 °C 15th |
0.8 °C 25th |
-1.0 °C 2nd |
-1.7 °C 18th |
4.4 °C 12th |
Lowest Mean |
-0.3 °C 5th |
1.3 °C 25th |
5.7 °C 3rd |
7.9 °C 2nd |
9.9 °C 2nd |
10.9 °C 30th |
8.9 °C 23rd |
3.0 °C 15th |
-1.1 °C 30th |
-1.9 °C 2nd |
-4.6 °C 18th |
2.5 °C 24th |
Highest Mean |
10.0 °C 17th |
10.8 °C 28th |
12.2 °C 7th |
17.1 °C 28th |
17.5 °C 8th |
17.2 °C 18th |
18.7 °C 10th |
16.2 °C 2nd |
11.1 °C 18th |
11.2 °C 24th |
9.5 °C 2nd |
11.3 °C 15th |
Averages | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Jan | Feb |
Mean | 5.1 °C | 5.6 °C | 9.2 °C | 13.0 °C | 13.3 °C | 14.0 °C | 14.8 °C | 11.1 °C | 6.2 °C | 6.4 °C | 2.9 °C | 6.9 °C |
Mean Minimum |
2.9 °C | 2.9 °C | 6.9 °C | 10.0 °C | 11.1 °C | 11.9 °C | 12.3 °C | 8.7 °C | 3.9 °C | 4.0 °C | 0.5 °C | 4.7 °C |
Mean Maximum |
7.5 °C | 7.9 °C | 11.6 °C | 16.0 °C | 15.3 °C | 16.2 °C | 17.1 °C | 13.3 °C | 8.5 °C | 8.3 °C | 5.4 °C | 9.1 °C |
Past Year Seasonal Averages | |||
Season | Daily Min | Daily Max | Mean |
Winter 23/24 | 3.1 °C |
7.6 °C |
5.4 °C |
Spring 2023 | 4.2 °C |
9.0 °C |
6.7 °C |
Summer 2023 | 11.0 °C |
15.9 °C |
13.4 °C |
Autumn 2023 | 8.3 °C |
13.0 °C |
10.7 °C |
View daily tables of
min /
max /
mean
Dew Point data for the past year
View monthly tables of
min /
max /
mean
Dew Point data for all months in the station history.
Latest charts and graphs of Dew Point
Past 24hrs and past 12 months trends for Dew Point
Current year vs last year daily trends for Dew Point
This year min/max daily trends in detail for Dew Point
Record Period Averages | ||||||
Measure | 7-day | Month | March | 31-day | Year | 365-day |
Least Humid |
-5.2 °C Ending 31st Mar 2013 |
-0.8 °C Jan 2009 |
-0.6 °C 2013 |
-2.3 °C Ending 9th Apr 2013 |
5.4 °C 2024 |
5.5 °C Ending 18th Jul 2013 |
Most Humid |
18.0 °C Ending 16th Aug 2020 |
14.8 °C Sep 2023 |
6.4 °C Current |
15.2 °C Ending 12th Sep 2023 |
8.9 °C 2023 |
9.2 °C Ending 21st Mar 2024 |
Lowest Mean Daily-Min |
-7.3 °C Ending 2nd Apr 2013 |
-3.3 °C Dec 2010 |
-3.0 °C 2013 |
-4.9 °C Ending 9th Apr 2013 |
3.1 °C 2024 |
2.9 °C Ending 18th Jul 2013 |
Highest Mean Daily-Min |
16.4 °C Ending 16th Aug 2020 |
12.4 °C Jul 2021 |
4.3 °C Current |
13.0 °C Ending 11th Sep 2023 |
6.5 °C 2023 |
6.8 °C Ending 20th Mar 2024 |
Lowest Mean Daily-Max |
-3.0 °C Ending 31st Mar 2013 |
1.6 °C Dec 2010 |
1.8 °C 2013 |
0.3 °C Ending 9th Apr 2013 |
7.5 °C 2024 |
8.2 °C Ending 27th Dec 2010 |
Highest Mean Daily-Max |
20.6 °C Ending 11th Sep 2023 |
17.1 °C Sep 2023 |
8.1 °C Current |
17.5 °C Ending 12th Sep 2023 |
11.2 °C 2023 |
11.5 °C Ending 21st Mar 2024 |
Ranked Historical Dew Point Data
Most Humid Days | |||
Rank | Min | Max | Mean |
1 | 17.6 °C 12th Aug 2020 |
22.2 °C 10th Sep 2023 |
19.1 °C 12th Aug 2020 |
2 | 17.5 °C 11th Aug 2020 |
21.7 °C 8th Sep 2023 |
19.0 °C 6th Sep 2016 |
3 | 16.9 °C 13th Aug 2020 |
21.6 °C 6th Sep 2023 |
18.8 °C 11th Aug 2020 |
4 | 16.8 °C 21st Aug 2010 |
21.5 °C 19th Jul 2021 |
18.7 °C 10th Sep 2023 |
5 | 16.8 °C 6th Sep 2016 |
21.2 °C 12th Aug 2020 |
18.6 °C 8th Sep 2023 |
6 | 16.8 °C 23rd Aug 2022 |
21.2 °C 12th Jun 2023 |
18.5 °C 13th Aug 2020 |
7 | 16.6 °C 24th Aug 2022 |
21.1 °C 25th Jul 2019 |
18.4 °C 10th Aug 2020 |
8 | 16.5 °C 10th Sep 2023 |
21.1 °C 9th Sep 2023 |
18.3 °C 19th Jul 2021 |
9 | 16.3 °C 7th Sep 2023 |
20.9 °C 27th Jul 2018 |
18.2 °C 7th Sep 2023 |
10 | 16.2 °C 10th Aug 2020 |
20.9 °C 21st Jul 2021 |
18.2 °C 23rd Aug 2022 |
Least Humid Days | |||
Rank | Min | Max | Mean |
1 | -11.5 °C 2nd Feb 2012 |
-7.9 °C 2nd Feb 2012 |
-9.7 °C 2nd Feb 2012 |
2 | -11.0 °C 5th Apr 2021 |
-6.2 °C 3rd Feb 2012 |
-7.8 °C 3rd Feb 2012 |
3 | -10.4 °C 7th Feb 2012 |
-5.1 °C 13th Feb 2021 |
-7.2 °C 13th Feb 2021 |
4 | -10.3 °C 12th Mar 2013 |
-5.0 °C 22nd Feb 2013 |
-7.2 °C 11th Feb 2012 |
5 | -10.2 °C 11th Feb 2012 |
-5.0 °C 28th Feb 2018 |
-6.9 °C 22nd Feb 2013 |
6 | -9.5 °C 1st Feb 2009 |
-4.5 °C 21st Feb 2013 |
-6.9 °C 21st Feb 2013 |
7 | -9.4 °C 25th Mar 2017 |
-4.5 °C 26th Mar 2013 |
-6.8 °C 28th Feb 2018 |
8 | -9.3 °C 20th Dec 2010 |
-4.4 °C 25th Mar 2013 |
-6.7 °C 12th Mar 2013 |
9 | -9.3 °C 2nd Apr 2013 |
-4.3 °C 12th Feb 2021 |
-6.3 °C 7th Mar 2010 |
10 | -9.3 °C 28th Feb 2018 |
-4.1 °C 2nd Feb 2015 |
-6.0 °C 1st Feb 2012 |
Most Humid Months | |||
Rank | Min | Max | Mean |
1 | 12.4 °C Jul 2021 |
17.1 °C Sep 2023 |
14.8 °C Sep 2023 |
2 | 12.3 °C Aug 2020 |
16.8 °C Jul 2021 |
14.7 °C Jul 2021 |
3 | 12.3 °C Sep 2023 |
16.7 °C Aug 2022 |
14.4 °C Aug 2020 |
4 | 12.1 °C Aug 2022 |
16.6 °C Aug 2020 |
14.4 °C Aug 2022 |
5 | 11.9 °C Aug 2023 |
16.2 °C Aug 2023 |
14.0 °C Aug 2023 |
6 | 11.4 °C Aug 2021 |
16.1 °C Jul 2018 |
13.5 °C Jul 2019 |
7 | 11.3 °C Aug 2019 |
16.0 °C Jun 2023 |
13.5 °C Jul 2022 |
8 | 11.2 °C Jul 2022 |
15.8 °C Sep 2021 |
13.5 °C Jul 2018 |
9 | 11.1 °C Jul 2023 |
15.7 °C Aug 2019 |
13.5 °C Sep 2021 |
10 | 11.0 °C Jul 2019 |
15.7 °C Jul 2019 |
13.5 °C Aug 2019 |
Least Humid Months | |||
Rank | Min | Max | Mean |
1 | -3.3 °C Dec 2010 |
1.6 °C Dec 2010 |
-0.8 °C Jan 2009 |
2 | -3.0 °C Mar 2013 |
1.8 °C Mar 2013 |
-0.6 °C Mar 2013 |
3 | -2.9 °C Feb 2013 |
2.2 °C Jan 2010 |
-0.5 °C Dec 2010 |
4 | -2.4 °C Feb 2018 |
2.5 °C Feb 2013 |
-0.4 °C Feb 2013 |
5 | -2.4 °C Jan 2017 |
2.5 °C Feb 2018 |
0.0 °C Feb 2018 |
6 | -2.2 °C Feb 2012 |
3.0 °C Feb 2012 |
0.2 °C Jan 2010 |
7 | -1.7 °C Jan 2010 |
3.3 °C Jan 2017 |
0.4 °C Jan 2017 |
8 | -1.6 °C Apr 2021 |
4.0 °C Feb 2015 |
0.5 °C Feb 2012 |
9 | -1.6 °C Feb 2015 |
4.0 °C Feb 2009 |
1.4 °C Apr 2021 |
10 | -1.5 °C Feb 2016 |
4.1 °C Jan 2019 |
1.5 °C Feb 2015 |
Most Humid Days in March | |||
Rank | Min | Max | Mean |
1 | 9.1 °C Day 17, 2023 |
12.6 °C Day 31, 2011 |
10.7 °C Day 20, 2010 |
2 | 9.0 °C Day 20, 2024 |
12.2 °C Day 17, 2024 |
10.4 °C Day 17, 2024 |
3 | 8.7 °C Day 31, 2023 |
12.1 °C Day 12, 2024 |
10.3 °C Day 10, 2020 |
4 | 8.6 °C Day 13, 2024 |
12.0 °C Day 20, 2010 |
10.1 °C Day 20, 2024 |
5 | 8.3 °C Day 30, 2023 |
11.9 °C Day 10, 2020 |
10.0 °C Day 17, 2023 |
Least Humid Days in March | |||
Rank | Min | Max | Mean |
1 | -10.3 °C Day 12, 2013 |
-4.5 °C Day 26, 2013 |
-6.7 °C Day 12, 2013 |
2 | -9.4 °C Day 25, 2017 |
-4.4 °C Day 25, 2013 |
-6.3 °C Day 7, 2010 |
3 | -9.0 °C Day 7, 2010 |
-3.8 °C Day 27, 2013 |
-6.0 °C Day 11, 2013 |
4 | -9.0 °C Day 11, 2013 |
-3.7 °C Day 7, 2010 |
-5.9 °C Day 26, 2013 |
5 | -8.4 °C Day 1, 2018 |
-3.6 °C Day 1, 2018 |
-5.8 °C Day 1, 2018 |
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.