Monthly Report for September 2017

Weather Summary
Measure	Mean / Sum (anomaly)	Min	Max	Mean Time
Minimum Temperature	10.9 °C (-0.6)	6.9 °C	14.7 °C	09:14
Maximum Temperature	18.4 °C (-0.7)	14.7 °C	22.4 °C	14:44
Mean Temperature	14.5 °C (-0.6)	10.9 °C	17.5 °C
Minimum Humidity	60%	37%	80%	15:09
Maximum Humidity	92%	80%	97%	09:16
Mean Humidity	79%	59%	90%
Minimum Pressure	1010 hPa	991 hPa	1021 hPa	11:19
Maximum Pressure	1016 hPa	1001 hPa	1025 hPa	13:14
Mean Pressure	1013 hPa	994 hPa	1022 hPa
Mean Wind Speed	4.4 mph (+0.5)	0.7 mph	10.2 mph
Maximum Wind Speed	12.4 mph	7.3 mph	24.2 mph	14:23
Maximum Gust	19.2 mph	10.4 mph	41.5 mph	13:17
Mean Wind Direction	222° [SW]	5° [N]	356° [N]
Rainfall	64.1 mm (128%)	0.0 mm	13.9 mm
Maximum Hourly Rain	1.7 mm	0.2 mm	5.5 mm	15:14
Maximum 10-min Rain	1.0 mm	0.2 mm	3.5 mm	15:54
Maximum Rain Rate	15 mm/h	0.4 mm/h	53 mm/h	14:35
Minimum Dew Point	8.5 °C	5.6 °C	12.8 °C	12:23
Maximum Dew Point	13.1 °C	9.8 °C	18.6 °C	14:13
Mean Dew Point	10.7 °C	7.8 °C	15.7 °C
Night Minimum (21-09)	11.1 °C	6.9 °C	16.0 °C	08:06
Day Maximum (09-21)	18.4 °C	14.7 °C	22.4 °C	14:44
Max 10m Temp Rise	0.6 °C	0.2 °C	0.9 °C	11:29
Max 1hr Temp Rise	2.0 °C	0.7 °C	3.3 °C	11:08
Max 1hr Hum Rise	11%	3%	21%	18:29
Max 10m Temp Fall	0.6 °C	0.3 °C	1.6 °C	16:06
Max 1hr Temp Fall	1.7 °C	0.9 °C	2.9 °C	16:44
Max 1hr Hum Fall	11%	7%	22%	12:26
Max 10m Wind Speed	9.2 mph	5.0 mph	18.4 mph	13:25
Minimum Feels-like	11.3 °C	4.7 °C	17.6 °C	10:09
Maximum Feels-like	20.6 °C	15.6 °C	28.1 °C	14:16
Mean Feels-like	16.1 °C	11.1 °C	21.8 °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	7.6 °C (-0.0)	3.4 °C	12.9 °C
Humidity Range	32%	17%	51%
Pressure Range	6 hPa	2 hPa	13 hPa
Sun Hours	115 (78%) [34%]
Wet Hours	55 (134%) [7.6%]

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 2017

September 2017: 2nd-coldest September of 18 since 2009 and on the dull side

Mean 14.5°C, 0.8°C below normal, the 2nd-coldest September of 18 since 2009. Highs averaged 18.4°C and lows 10.9°C. Warmest 22.4°C (02 Sep), coldest night 6.9°C (22 Sep).
Rain 64.1 mm, 128% of normal, the 3rd-wettest September of 18 since 2009, over 11 days of 1 mm+. Wettest day: 13.9 mm on 27 Sep.
Sunshine 115.1 hours, 78% of normal, 2nd-dullest of 18 station Septembers.
Days that still hold the station record for their date: 04 Sep (8.8 mm rain), 11 Sep (7.7 mm rain), 16 Sep (7.9°C low min), 19 Sep (14.7°C low max).
Max gust 41.5 mph set a station record for September.

Written Mon 02 Nov, 18:03 GMT

‹ Aug 2017 Oct 2017 ›

Written reports for 2017: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec · the year

Days Of...
Rainfall		Temperature		Sunshine		Other
> 0.0 mm	18	Min < -5.0 °C	0	> 0 hrs	28	Falling Snow	0
> 0.1 mm	18	Min < 0.0 °C	0	> 1 hrs	23	Lying Snow	0
> 0.3 mm	16	Mean < 0.0 °C	0	> 3 hrs	15	Hail	0
> 1.0 mm	11	Mean > 20.0 °C	0	> 5 hrs	8	Thunder	1
> 5.0 mm	6	Max > 25.0 °C	0	> 10 hrs	1	Dense Fog	0
> 10.0 mm	1	Max > 30.0 °C	0	> 25% max poss.	18	Gusts > 30mph	3
> 20.0 mm	0	Min > 20.0 °C	0	> 95% max poss.	0	Total Events	4

Misc.

Mean rainfall for days with >0.3mm: 4.0 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	8.9	21.6	15.4	0.0	-	-	-	10	1.4	7.5	10.5	5°	5.0
2	9.5	22.4	16.6	0.0	-	-	-	11	0.7	7.3	10.5	208°	5.3
3	10.8	18.8	14.9	0.3	0.3	0.3	-	0	4.0	11.7	19.9	188°	9.7
4	13.7	21.6	17.4	8.8	2.6	1.5	13	0.5	4.0	12.0	19.6	188°	8.9
5	14.3	20.4	17.5	1.1	0.9	0.4	7	0.2	6.3	14.1	21.9	229°	10.7
6	11.7	18.3	15.0	0.0	-	-	-	4	5.1	14.6	20.1	274°	9.6
7	11.6	19.2	15.6	0.0	-	-	-	4	5.0	14.3	21.9	240°	10.7
8	12.4	17.9	15.3	5.7	2.2	0.7	13	1	5.8	16.2	23.0	247°	11.8
9	10.4	18.1	13.6	0.4	0.4	0.4	13	7	4.8	12.2	18.4	273°	9.5
10	8.9	16.7	13.1	0.2	0.2	0.2	-	4	6.7	20.0	32.3	235°	14.5
11	11.0	19.1	13.8	7.7	5.5	3.5	53	2	8.3	18.8	31.1	250°	14.4
12	10.2	18.2	13.7	2.4	1.3	0.7	7	7	7.8	19.9	30.0	244°	14.0
13	11.2	17.3	14.3	2.6	2.0	2.0	40	9	10.2	24.2	41.5	258°	18.4
14	8.0	16.8	11.8	0.7	0.7	0.4	7	3	5.7	14.7	21.9	282°	11.0
15	7.2	15.9	11.2	0.0	-	-	-	5	2.8	7.8	11.5	311°	5.4
16	7.9	15.1	11.3	0.0	-	-	-	2	2.0	7.9	12.7	334°	5.5
17	8.8	16.5	11.9	0.0	-	-	-	3	2.2	8.6	15.0	356°	6.7
18	10.0	16.6	12.7	2.0	1.3	0.4	2.6	3	2.8	9.6	17.3	337°	5.9
19	8.1	14.7	10.9	1.5	1.1	0.4	3.3	4	1.7	7.3	10.4	315°	5.3
20	9.1	17.6	13.8	0.0	-	-	-	2	4.7	12.1	18.4	222°	9.4
21	11.9	17.8	15.4	0.9	0.9	0.4	2.6	1	5.6	15.3	21.9	215°	10.8
22	6.9	18.3	13.0	0.0	-	-	-	10	3.4	11.4	17.3	230°	8.7
23	13.1	19.1	15.9	0.0	-	-	-	1	4.0	9.4	16.1	178°	7.3
24	10.6	21.9	16.4	0.0	-	-	-	9	3.6	13.0	17.3	114°	9.6
25	14.7	18.1	15.9	0.7	0.4	0.2	0.4	0	2.8	8.1	11.5	73°	6.1
26	13.7	20.0	16.1	0.0	-	-	-	4	2.5	8.4	11.5	72°	5.4
27	13.3	20.7	16.3	13.9	4.8	1.3	13	1	4.1	10.0	17.3	132°	7.7
28	14.1	19.1	16.4	8.1	3.3	2.4	40	4	4.1	9.4	16.1	216°	6.9
29	12.8	18.5	16.2	6.2	2.2	1.8	26	0.3	4.2	13.4	19.6	221°	10.0
30	11.3	17.1	13.8	0.9	0.7	0.4	4.4	3	4.6	13.1	19.6	217°	10.4

Humidity, dew point & pressure

Day	Hmin	Hmax	Hmean	Dmin	Dmax	Dmean	Pmin	Pmax	Pmean
1	42	83	63	5.8	11.0	7.9	1020	1025	1022
2	37	80	59	5.6	11.3	8.0	1018	1025	1022
3	50	92	69	6.3	12.5	9.1	1010	1019	1014
4	80	97	90	12.4	18.6	15.7	1009	1015	1012
5	74	92	86	12.4	16.9	15.2	1012	1016	1014
6	51	92	74	8.0	12.6	10.2	1016	1020	1019
7	60	88	76	8.7	13.6	11.2	1007	1019	1014
8	70	93	84	10.3	14.6	12.6	996	1007	1000
9	56	92	80	8.9	11.9	9.9	996	1002	998
10	66	96	85	8.1	13.7	10.6	992	1003	999
11	60	91	80	8.0	13.2	10.3	991	1001	994
12	49	93	78	7.2	12.5	9.7	995	1007	1004
13	57	95	71	6.6	14.0	9.0	993	1002	999
14	55	89	77	6.3	9.8	7.8	1001	1014	1007
15	57	92	81	5.7	10.0	7.9	1012	1014	1013
16	67	93	84	6.5	10.1	8.5	1010	1013	1012
17	60	95	84	7.5	11.0	9.2	1012	1016	1013
18	61	95	83	7.7	11.7	9.7	1016	1020	1017
19	65	96	85	6.5	10.1	8.3	1020	1022	1021
20	70	96	83	8.0	12.9	10.9	1016	1022	1019
21	69	92	82	10.6	14.0	12.2	1014	1019	1015
22	51	97	76	6.0	10.6	8.6	1019	1022	1021
23	51	82	70	6.6	12.4	10.2	1020	1023	1022
24	44	95	73	9.1	13.9	11.0	1018	1021	1019
25	72	94	87	12.8	15.0	13.8	1018	1022	1019
26	65	93	82	10.9	14.6	12.9	1021	1023	1022
27	64	95	85	12.5	14.9	13.6	1017	1023	1019
28	64	96	85	11.7	15.7	13.8	1015	1020	1018
29	78	96	88	10.9	16.5	14.1	1014	1018	1016
30	58	92	81	8.5	12.6	10.5	1014	1018	1016

Other measures

Day	Night	Daymax	T+10m	T+1h	H+1h	T-10m	T-1h	H-1h	Fmin	Fmax	Fmean	AQmin	AQmax	AQmean
1	8.9	21.6	0.6	2.8	7	0.5	1.8	9	7.5	22.2	15.8	-	-	-
2	9.5	22.4	0.6	3.3	9	0.9	1.6	9	9.5	25.0	17.1	-	-	-
3	10.8	18.8	0.9	1.8	18	1.4	1.5	9	10.8	20.8	15.8	-	-	-
4	13.0	21.6	0.5	1.5	3	0.3	1.0	7	16.2	28.1	21.8	-	-	-
5	16.0	20.4	0.7	1.7	10	0.7	2.3	8	16.8	24.9	21.6	-	-	-
6	11.7	18.3	0.5	1.4	9	0.4	1.7	11	13.0	19.5	16.4	-	-	-
7	11.6	19.2	0.5	1.9	10	0.3	0.9	7	12.7	21.2	17.4	-	-	-
8	14.4	17.9	0.3	1.0	8	0.8	2.9	10	14.2	20.8	17.9	-	-	-
9	10.4	18.1	0.6	2.5	19	0.9	2.0	11	11.2	19.4	14.8	-	-	-
10	8.9	16.7	0.6	2.7	12	0.4	1.2	10	6.9	19.0	14.3	-	-	-
11	11.0	19.1	0.6	1.7	16	0.9	2.5	11	11.4	21.1	15.2	-	-	-
12	10.2	18.2	0.6	2.3	14	0.4	1.5	9	10.9	18.7	14.8	-	-	-
13	12.4	17.3	0.6	2.3	21	1.6	2.8	22	11.2	18.2	15.2	-	-	-
14	8.0	16.8	0.5	1.8	13	0.7	2.4	8	4.8	17.5	11.5	-	-	-
15	7.2	15.9	0.6	2.7	15	0.6	2.0	10	4.7	16.8	11.2	-	-	-
16	7.9	15.1	0.5	1.8	6	0.4	1.4	8	6.2	16.2	11.7	-	-	-
17	8.8	16.5	0.5	1.5	11	0.5	1.8	12	7.4	18.0	12.6	-	-	-
18	10.0	16.6	0.7	2.0	11	0.7	1.8	16	10.9	18.1	13.8	-	-	-
19	8.1	14.7	0.6	1.9	10	0.6	2.7	11	6.4	15.6	11.1	-	-	-
20	8.2	17.6	0.6	2.9	6	0.4	1.3	9	7.3	20.1	15.4	-	-	-
21	14.2	17.8	0.5	1.9	13	0.5	1.4	11	13.5	20.4	17.8	-	-	-
22	6.9	18.3	0.7	3.0	9	0.4	1.2	16	5.3	19.2	13.7	-	-	-
23	13.1	19.1	0.5	1.5	11	0.3	1.3	10	14.4	20.8	17.2	-	-	-
24	10.6	21.9	0.7	3.0	10	0.3	1.4	13	11.7	23.4	18.1	-	-	-
25	14.7	18.1	0.2	0.7	9	0.3	1.0	8	17.6	21.7	19.2	-	-	-
26	13.7	20.0	0.5	1.5	10	0.4	1.1	11	16.2	23.3	18.9	-	-	-
27	13.3	20.7	0.5	1.6	11	0.3	1.2	9	15.8	24.2	19.4	-	-	-
28	15.4	19.1	0.5	1.7	8	0.3	1.3	12	16.4	22.0	19.7	-	-	-
29	14.1	18.5	0.3	1.0	7	1.0	2.3	10	14.5	22.8	19.7	-	-	-
30	11.3	17.1	0.6	2.6	9	0.3	0.9	16	12.2	18.3	15.3	-	-	-

View daily report for the 1st