Historical Ranked Monthly Data for Sep - Night Minimum (21-09) / °C
Weather Variable:
Top monthly mean
Rank
Value
Date
1
14.6
Sep 2023
2
14.3
Sep 2016
3
13.3
Sep 2021
4
12.8
Sep 2011
5
12.6
Sep 2014
6
12.0
Sep 2024
7
11.9
Sep 2009
8
11.8
Sep 2022
9
11.8
Sep 2019
Bottom monthly mean
Rank
Value
Date
1
10.3
Sep 2015
2
10.7
Sep 2012
3
11.1
Sep 2025
4
11.1
Sep 2017
5
11.4
Sep 2018
6
11.4
Sep 2013
7
11.4
Sep 2010
8
11.7
Sep 2020
9
11.8
Sep 2019
Night Minimum (21-09) monthly extremes: highest and lowest monthly means. There are 17 valid months for the chosen period from 2009 to present for Sep in London, NW3.
Top monthly lowest
Rank
Value
Date
1
8.5
Sep 2016
2
8.5
Sep 2009
3
8.4
Sep 2023
4
7.8
Sep 2021
5
7.7
Sep 2014
6
7.2
Sep 2011
7
6.9
Sep 2019
8
6.9
Sep 2017
9
6.7
Sep 2013
Bottom monthly lowest
Rank
Value
Date
1
3.9
Sep 2025
2
4.4
Sep 2018
3
4.4
Sep 2024
4
4.9
Sep 2022
5
5.6
Sep 2010
6
5.6
Sep 2015
7
5.8
Sep 2012
8
6.3
Sep 2020
9
6.7
Sep 2013
Night Minimum (21-09) monthly extremes: highest and lowest monthly minima. There are 17 valid months for the chosen period from 2009 to present for Sep in London, NW3.
Top monthly highest
Rank
Value
Date
1
19.9
Sep 2016
2
19.3
Sep 2023
3
18.4
Sep 2020
4
18.3
Sep 2024
5
17.8
Sep 2011
6
17.7
Sep 2025
7
17.6
Sep 2018
8
17.3
Sep 2021
9
16.9
Sep 2009
Bottom monthly highest
Rank
Value
Date
1
15.5
Sep 2015
2
15.9
Sep 2019
3
16.0
Sep 2017
4
16.1
Sep 2014
5
16.1
Sep 2022
6
16.2
Sep 2013
7
16.5
Sep 2010
8
16.8
Sep 2012
9
16.9
Sep 2009
Night Minimum (21-09) monthly extremes: highest and lowest monthly maxima. There are 17 valid months for the chosen period from 2009 to present for Sep in London, NW3.