Monthly Report for September 2023

Weather Summary
Measure	Mean / Sum (anomaly)	Min	Max	Mean Time
Minimum Temperature	14.2 °C (+2.7)	8.4 °C	19.3 °C	08:45
Maximum Temperature	23.2 °C (+4.1)	17.0 °C	31.7 °C	14:59
Mean Temperature	18.6 °C (+3.4)	13.0 °C	24.9 °C
Minimum Humidity	61%	38%	80%	15:10
Maximum Humidity	94%	87%	98%	09:42
Mean Humidity	80%	68%	89%
Minimum Pressure	1012 hPa	994 hPa	1027 hPa	13:31
Maximum Pressure	1019 hPa	998 hPa	1029 hPa	10:51
Mean Pressure	1015 hPa	997 hPa	1028 hPa
Mean Wind Speed	4.3 mph (+0.4)	1.3 mph	10.5 mph
Maximum Wind Speed	13.0 mph	6.7 mph	23.2 mph	14:39
Maximum Gust	20.1 mph	10.4 mph	35.7 mph	12:59
Mean Wind Direction	201° [SSW]	71° [ENE]	315° [NW]
Rainfall	48.5 mm (97%)	0.0 mm	21.4 mm
Maximum Hourly Rain	3.2 mm	0.2 mm	9.2 mm	12:14
Maximum 10-min Rain	1.8 mm	0.2 mm	3.9 mm	11:56
Maximum Rain Rate	29 mm/h	7 mm/h	42 mm/h	11:38
Minimum Dew Point	12.3 °C	7.1 °C	16.5 °C	10:27
Maximum Dew Point	17.1 °C	11.2 °C	22.2 °C	12:35
Mean Dew Point	14.8 °C	8.9 °C	18.7 °C
Night Minimum (21-09)	14.6 °C	8.4 °C	19.3 °C	05:58
Day Maximum (09-21)	23.2 °C	17.0 °C	31.7 °C	14:54
Max 10m Temp Rise	0.6 °C	0.4 °C	0.8 °C	10:25
Max 1hr Temp Rise	2.3 °C	1.0 °C	4.2 °C	10:21
Max 1hr Hum Rise	9%	3%	19%	18:05
Max 10m Temp Fall	0.5 °C	0.2 °C	1.2 °C	15:48
Max 1hr Temp Fall	1.7 °C	0.5 °C	3.2 °C	17:04
Max 1hr Hum Fall	10%	4%	20%	11:06
Max 10m Wind Speed	9.5 mph	4.2 mph	17.6 mph	14:10
Minimum Feels-like	16.8 °C	5.4 °C	24.6 °C	09:13
Maximum Feels-like	28.2 °C	17.9 °C	39.8 °C	14:08
Mean Feels-like	22.5 °C	13.2 °C	31.1 °C
Air-frost Hrs	0 hrs	0 hrs	0 hrs
Minimum PM2.5	0.0 µg/m³	0.0 µg/m³	0.0 µg/m³	n/a
Maximum PM2.5	n/a	n/a	n/a
Mean PM2.5	n/a	n/a	n/a
Temperature Range	8.9 °C (+1.3)	3.7 °C	15.2 °C
Humidity Range	32%	9%	58%
Pressure Range	6 hPa	2 hPa	16 hPa
Sun Hours	165 (112%) [48%]
Wet Hours	29 (71%) [4%]

NB: Hover over a value to see how many days of data it is from. Sun hrs, Wet hrs, Cloud cover and Events are based on manual observation and provided for interest only.

Written report

September 2023

September 2023: Warmest September in 18 years of station data

Mean 18.6°C, 3.3°C above normal, the warmest September in 18 years of station data. Highs averaged 23.2°C and lows 14.2°C. Warmest 31.7°C (09 Sep), coldest night 8.4°C (23 Sep). 4 days of 30°C+.
Rain 48.5 mm, 97% of normal, over 7 days of 1 mm+. The biggest fall was 21.4 mm on 20 Sep.
Sunshine 165.2 hours, 112% of normal.
Date records still standing: 03 Sep (11.0 h sun), 04 Sep (28.3°C max), 05 Sep (28.7°C max), 06 Sep (30.6°C max).

Written Mon 02 Nov, 18:04 GMT

‹ Aug 2023 Oct 2023 ›

Written reports for 2023: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec · the year

Days Of...
Rainfall		Temperature		Sunshine		Other
> 0.0 mm	9	Min < -5.0 °C	0	> 0 hrs	30	Falling Snow	0
> 0.1 mm	9	Min < 0.0 °C	0	> 1 hrs	23	Lying Snow	0
> 0.3 mm	8	Mean < 0.0 °C	0	> 3 hrs	18	Hail	0
> 1.0 mm	7	Mean > 20.0 °C	8	> 5 hrs	15	Thunder	1
> 5.0 mm	3	Max > 25.0 °C	10	> 10 hrs	5	Dense Fog	0
> 10.0 mm	1	Max > 30.0 °C	4	> 25% max poss.	21	Gusts > 30mph	4
> 20.0 mm	1	Min > 20.0 °C	0	> 95% max poss.	0	Total Events	5

Misc.

Mean rainfall for days with >0.3mm: 6.1 mm
Total snowfall: 0.0 mm

Graphs and Charts

Mean Temperature

Variable

Measure

View more charts for this month

Intraday conditions

Per-minute readings across the month (downsampled for display). Choose a variable below.

Wind rose

Daily breakdown

Day numbers link to the detailed daily report. Wide tables can be scrolled horizontally.

Temperature, rain, sunshine & wind

Day	Tmin	Tmax	Tmean	Rain	Hr max	10m rain	Rate	Sun	Wmean	Wmax	Gust	Wdir	W10m
1	15.1	22.2	17.9	2.2	1.7	1.7	42	3	1.6	6.7	11.5	71°	4.2
2	16.6	22.9	19.0	0.0	-	-	-	3	3.7	12.0	16.1	98°	9.2
3	12.7	25.7	19.3	0.0	-	-	-	11	2.0	8.3	12.7	99°	5.6
4	15.9	28.3	21.1	0.0	-	-	-	11	4.5	12.7	18.4	114°	9.4
5	15.3	28.7	21.5	0.0	-	-	-	12	4.2	11.6	17.3	109°	8.1
6	15.4	30.6	22.6	0.0	-	-	-	10	1.7	7.3	11.5	121°	4.8
7	17.6	30.5	23.6	0.0	-	-	-	10	2.4	8.4	11.5	115°	6.1
8	17.4	29.7	23.2	0.0	-	-	-	4	1.4	8.1	10.4	303°	5.5
9	17.6	31.7	24.9	0.0	-	-	-	11	1.3	7.0	10.4	194°	4.3
10	18.0	30.4	23.4	0.0	-	-	-	8	3.2	12.8	19.6	214°	9.9
11	19.3	25.1	21.7	0.0	-	-	-	3	5.6	12.2	20.7	278°	8.8
12	14.2	23.2	19.4	2.4	1.4	1.0	7	0.2	3.3	11.8	18.4	315°	8.4
13	13.3	19.9	16.4	0.0	-	-	-	3	3.1	11.9	18.4	78°	7.8
14	11.9	23.3	17.9	0.0	-	-	-	10	2.8	12.2	16.1	248°	6.5
15	11.4	24.5	18.1	0.0	-	-	-	8	1.7	10.3	15.0	147°	7.7
16	13.3	26.1	19.3	0.0	-	-	-	7	3.7	11.4	19.6	106°	9.0
17	15.9	20.1	17.9	3.8	2.6	2.2	30	0.4	5.2	14.5	21.9	110°	10.8
18	13.6	18.7	16.9	8.2	7.9	3.9	30	3	6.9	21.3	34.6	263°	16.3
19	12.9	18.4	16.2	0.2	0.2	0.2	-	0.1	9.8	20.5	32.3	252°	17.6
20	14.2	19.9	17.5	21.4	9.2	3.9	42	0.3	10.5	23.2	35.7	246°	16.7
21	11.6	18.2	14.0	7.4	4.3	2.4	42	5	2.7	12.4	18.4	244°	8.5
22	10.3	17.4	13.2	0.5	0.5	0.2	-	6	3.5	12.8	18.4	305°	8.7
23	8.4	17.0	13.0	0.0	-	-	-	7	4.9	11.1	17.3	278°	8.4
24	12.7	19.6	16.4	0.0	-	-	-	0.7	7.0	17.2	27.6	229°	13.8
25	15.6	21.4	18.3	0.0	-	-	-	8	5.5	15.4	24.2	249°	10.7
26	13.2	22.6	17.8	0.0	-	-	-	6	5.3	15.4	25.3	229°	12.4
27	13.7	21.2	17.8	0.0	-	-	-	1	5.6	16.5	31.1	217°	13.3
28	15.4	19.1	16.9	0.0	-	-	-	1	7.2	17.2	26.5	245°	12.3
29	13.9	19.2	16.9	2.4	1.2	0.8	7	8	4.9	13.6	20.7	304°	10.4
30	10.8	19.4	15.5	0.0	-	-	-	5	4.2	14.3	20.7	247°	10.7

Humidity, dew point & pressure

Day	Hmin	Hmax	Hmean	Dmin	Dmax	Dmean	Pmin	Pmax	Pmean
1	75	96	89	13.4	18.3	16.0	1009	1017	1012
2	70	95	85	15.0	17.7	16.3	1016	1027	1022
3	61	97	81	11.8	18.6	15.8	1027	1029	1028
4	38	96	73	12.2	17.7	15.2	1021	1028	1024
5	49	94	74	13.8	19.1	16.2	1017	1021	1019
6	55	91	75	13.6	21.6	17.7	1019	1021	1020
7	49	93	74	16.3	20.1	18.2	1016	1020	1018
8	55	94	77	16.1	21.7	18.6	1017	1018	1018
9	48	90	68	15.6	21.1	18.2	1016	1018	1017
10	57	93	76	16.5	22.2	18.7	1015	1018	1016
11	62	89	78	16.1	18.3	17.5	1013	1015	1014
12	69	93	83	13.1	17.7	16.3	1014	1018	1015
13	65	93	80	11.5	14.0	12.9	1018	1024	1022
14	50	96	74	10.8	14.6	12.9	1020	1024	1022
15	57	98	78	10.5	16.9	14.0	1013	1020	1016
16	52	96	77	12.3	18.0	14.7	1013	1016	1014
17	80	95	89	13.7	17.7	16.1	1005	1016	1012
18	67	96	84	9.6	17.7	14.2	1000	1009	1003
19	79	88	85	10.3	16.0	13.7	1005	1010	1007
20	72	95	86	13.0	16.2	15.1	994	1005	1000
21	64	96	88	10.6	13.5	11.8	996	998	997
22	65	96	84	9.2	11.9	10.5	997	1010	1002
23	57	92	77	7.1	11.2	8.9	1010	1021	1016
24	75	87	81	9.2	15.6	13.0	1016	1021	1019
25	58	94	78	12.8	15.3	14.1	1016	1022	1020
26	49	95	81	11.2	17.5	14.3	1016	1021	1018
27	70	96	84	12.7	16.8	14.9	1009	1020	1015
28	68	92	78	11.6	16.6	13.0	1011	1017	1014
29	60	94	80	11.0	17.3	13.3	1010	1026	1019
30	65	95	80	9.3	13.6	11.9	1023	1028	1025

Other measures

Day	Night	Daymax	T+10m	T+1h	H+1h	T-10m	T-1h	H-1h	Fmin	Fmax	Fmean	AQmin	AQmax	AQmean
1	15.1	22.2	0.4	1.8	5	0.3	1.4	10	18.2	28.4	22.6	-	-	-
2	16.6	22.9	0.7	1.5	6	0.4	1.3	6	20.7	28.4	23.8	-	-	-
3	12.7	25.7	0.6	2.7	11	0.4	2.0	11	14.9	32.0	23.8	-	-	-
4	15.9	28.3	0.8	4.0	12	0.5	2.3	20	19.8	33.0	25.2	-	-	-
5	15.3	28.7	0.6	2.7	7	0.4	2.0	10	18.5	35.2	26.3	-	-	-
6	15.4	30.6	0.6	3.0	8	0.5	2.2	10	18.5	39.2	28.6	-	-	-
7	17.6	30.5	0.5	2.5	15	0.5	2.2	9	22.4	37.7	29.8	-	-	-
8	17.4	29.7	0.7	3.0	11	0.5	2.2	12	22.1	38.2	29.8	-	-	-
9	17.6	31.7	0.8	4.2	9	0.5	2.4	16	22.1	39.7	31.1	-	-	-
10	18.0	30.4	0.7	3.0	7	0.4	1.4	11	22.9	39.8	30.0	-	-	-
11	19.3	25.1	0.6	2.4	5	0.4	1.1	8	24.6	30.8	27.3	-	-	-
12	17.7	23.2	0.5	1.5	8	0.6	2.1	7	17.1	28.6	24.2	-	-	-
13	13.3	19.9	0.5	2.2	10	0.4	1.8	8	15.3	23.1	19.1	-	-	-
14	11.9	23.3	0.7	3.0	9	0.4	1.7	14	13.6	26.4	20.7	-	-	-
15	11.4	24.5	0.7	3.2	13	0.5	1.5	16	12.9	29.4	21.6	-	-	-
16	13.3	26.1	0.7	3.8	11	0.6	2.3	14	15.8	31.6	23.1	-	-	-
17	15.9	20.1	0.6	1.9	7	0.3	0.9	7	19.2	25.2	22.6	-	-	-
18	16.1	18.7	0.5	1.0	6	1.0	1.9	14	15.2	24.3	20.5	-	-	-
19	12.9	18.4	0.4	1.3	6	0.2	0.5	7	14.3	22.8	19.5	-	-	-
20	16.9	19.9	0.6	1.4	15	1.1	2.9	5	17.1	23.8	21.5	-	-	-
21	11.6	18.2	0.5	2.7	19	1.2	3.2	13	13.3	20.5	16.1	-	-	-
22	10.3	17.4	0.6	2.2	12	0.7	2.1	12	11.4	19.3	14.7	-	-	-
23	8.4	17.0	0.7	2.3	6	0.3	1.1	9	5.4	17.9	13.2	-	-	-
24	12.7	19.6	0.5	1.6	3	0.3	0.9	4	13.6	23.7	19.2	-	-	-
25	15.9	21.4	0.5	1.9	7	0.3	1.2	11	18.6	24.6	21.7	-	-	-
26	13.2	22.6	0.5	1.9	10	0.4	1.4	13	15.4	27.3	21.3	-	-	-
27	13.7	21.2	0.7	2.5	7	0.5	2.1	11	16.4	26.2	21.7	-	-	-
28	15.4	19.1	0.4	1.2	9	0.4	1.0	4	17.6	23.1	19.8	-	-	-
29	15.1	19.2	0.5	1.2	6	0.7	1.9	10	15.7	23.8	19.9	-	-	-
30	10.8	19.4	0.6	2.7	7	0.3	1.1	12	11.8	22.4	17.7	-	-	-

View daily report for the 1st