Monthly Report for December 2011

Weather Summary
Measure	Mean / Sum (anomaly)	Min	Max	Mean Time
Minimum Temperature	4.3 °C (+0.7)	-1.3 °C	10.6 °C	12:35
Maximum Temperature	9.1 °C (+0.9)	4.1 °C	12.9 °C	14:48
Mean Temperature	6.8 °C (+0.8)	1.5 °C	11.7 °C
Minimum Humidity	71%	45%	91%	13:18
Maximum Humidity	90%	77%	98%	12:49
Mean Humidity	81%	66%	94%
Minimum Pressure	1007 hPa	980 hPa	1031 hPa	10:32
Maximum Pressure	1016 hPa	995 hPa	1035 hPa	12:17
Mean Pressure	1011 hPa	990 hPa	1032 hPa
Mean Wind Speed	6.2 mph (+1.1)	4.0 mph	9.6 mph
Maximum Wind Speed	15.5 mph	8.7 mph	22.5 mph
Maximum Gust	22.9 mph	12.8 mph	40.9 mph	12:00
Mean Wind Direction	235° [SW]	n/a	270° [W]
Rainfall	56.2 mm (99%)	0.0 mm	9.1 mm
Maximum Hourly Rain	1.6 mm	0.3 mm	5.3 mm	15:30
Maximum 10-min Rain	0.8 mm	0.3 mm	3.0 mm	16:02
Maximum Rain Rate	10 mm/h	0.5 mm/h	30 mm/h	15:57
Minimum Dew Point	1.2 °C	-3.6 °C	9.8 °C	11:49
Maximum Dew Point	6.6 °C	0.6 °C	11.2 °C	13:29
Mean Dew Point	3.7 °C	-1.0 °C	10.3 °C
Night Minimum (21-09)	5.0 °C	-1.3 °C	11.5 °C	07:42
Day Maximum (09-21)	8.7 °C	3.8 °C	12.9 °C	14:09
Max 10m Temp Rise	0.3 °C	0.1 °C	1.0 °C	08:43
Max 1hr Temp Rise	1.0 °C	0.3 °C	1.8 °C	10:07
Max 1hr Hum Rise	5%	2%	12%	14:13
Max 10m Temp Fall	0.3 °C	0.1 °C	0.7 °C	13:12
Max 1hr Temp Fall	0.9 °C	0.3 °C	2.4 °C	15:40
Max 1hr Hum Fall	4%	0%	14%	13:09
Max 10m Wind Speed	10.9 mph	6.8 mph	17.4 mph	10:37
Minimum Feels-like	0.7 °C	-6.0 °C	11.7 °C	11:07
Maximum Feels-like	8.5 °C	0.6 °C	14.4 °C	13:58
Mean Feels-like	5.0 °C	-2.5 °C	13.1 °C	n/a
Air-frost Hrs	6 hrs	0 hrs	4 hrs
Minimum PM2.5	0.0 µg/m³	0.0 µg/m³	0.0 µg/m³
Maximum PM2.5	n/a	n/a	n/a
Mean PM2.5	n/a	n/a	n/a
Temperature Range	4.8 °C (+0.2)	1.9 °C	8.9 °C
Humidity Range	19%	5%	44%
Pressure Range	9 hPa	2 hPa	23 hPa
Sun Hours	68 (105%) [31%]
Wet Hours	60 (97%) [8.1%]

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.

Days Of...
Rainfall		Temperature		Sunshine		Other
> 0.0 mm	21	Min < -5.0 °C	0	> 0 hrs	25	Falling Snow	1
> 0.1 mm	21	Min < 0.0 °C	2	> 1 hrs	16	Lying Snow	0
> 0.3 mm	15	Mean < 0.0 °C	0	> 3 hrs	10	Hail	0
> 1.0 mm	11	Mean > 20.0 °C	0	> 5 hrs	5	Thunder	0
> 5.0 mm	4	Max > 25.0 °C	0	> 10 hrs	0	Dense Fog	0
> 10.0 mm	0	Max > 30.0 °C	0	> 25% max poss.	14	Gusts > 30mph	4
> 20.0 mm	0	Ice Days	0	> 95% max poss.	0	Total Events	5

Misc.

Mean rainfall for days with >0.3mm: 3.7 mm
Total snowfall: 0.5 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	5.9	11.6	9.5	6.1	1.7	0.5	3.4	1	4.2	20.6	28.6	235°	13.2
2	2.7	8.1	5.3	0.3	0.3	-	-	5	4.4	16.3	24.4	233°	9.4
3	7.7	11.3	9.9	0.5	0.3	0.3	-	2	7.0	16.1	23.5	237°	10.3
4	3.9	9.3	7.5	0.3	-	-	-	0.1	5.3	11.8	16.8	242°	7.1
5	2.3	6.9	4.2	0.0	-	-	-	4	6.1	15.9	21.5	242°	9.4
6	2.6	6.6	4.6	0.0	-	-	-	2	5.7	12.1	15.2	229°	8.2
7	4.5	8.7	7.1	0.3	-	-	-	6	7.9	20.1	32.0	251°	12.7
8	3.8	12.7	8.8	0.8	0.8	0.3	1.2	0	9.5	22.5	36.5	222°	15.4
9	1.9	7.6	5.0	0.0	-	-	-	6	6.5	15.2	21.3	245°	9.5
10	0.3	5.1	2.6	0.0	-	-	-	6	4.7	8.7	12.8	238°	6.8
11	3.0	8.6	6.6	5.6	5.3	2.0	20	0	5.7	15.9	22.5	201°	11.2
12	2.7	9.9	6.3	4.9	1.7	0.6	2.5	6	7.5	22.5	40.9	216°	15.4
13	4.4	11.6	7.6	9.1	4.9	3.0	30	5	9.6	20.8	32.2	225°	17.4
14	4.0	5.9	4.9	0.3	-	0.3	-	2	6.3	19.4	26.3	215°	14.4
15	4.0	7.9	5.8	2.2	1.4	0.3	1.3	3	7.1	19.2	27.7	225°	12.4
16	1.0	4.1	2.8	6.3	1.6	0.5	1.7	0.5	5.8	13.5	19.8	0°	-
17	0.6	5.1	2.6	0.5	0.5	0.3	-	4	4.7	12.3	18.1	270°	-
18	-0.9	4.8	1.5	0.0	-	-	-	2	4.2	11.5	17.0	270°	-
19	-1.3	6.3	3.1	3.6	1.4	0.6	2.7	0.1	4.1	10.8	15.8	225°	-
20	5.3	7.7	6.4	0.9	0.5	0.3	0.5	4	5.2	13.1	19.2	270°	-
21	6.1	11.8	9.4	1.7	0.5	0.3	0.6	0	4.0	12.3	18.1	270°	7.8
22	8.0	11.9	10.0	0.0	-	-	-	6	5.3	12.5	18.5	264°	9.5
23	4.6	11.2	9.2	4.1	2.8	1.4	20	0	7.8	17.6	26.3	257°	12.5
24	3.0	8.2	5.6	0.3	0.3	-	-	0.7	5.7	12.5	15.9	256°	8.2
25	8.2	11.9	10.5	0.0	-	-	-	0.1	7.4	14.5	21.0	242°	10.8
26	9.9	12.9	11.6	0.0	-	-	-	0.1	7.4	16.6	23.7	242°	10.5
27	8.2	10.4	9.8	0.0	-	-	-	0	5.7	12.5	17.5	233°	9.2
28	5.6	10.8	8.7	0.0	-	-	-	2	8.2	18.1	27.9	247°	11.6
29	5.0	9.7	7.0	3.3	3.3	1.9	25	0.5	7.8	17.8	26.6	265°	11.5
30	5.1	10.6	6.7	4.8	1.4	0.5	24	0.1	5.2	12.5	21.9	258°	8.6
31	10.6	12.5	11.7	0.3	0.3	0.3	-	0	7.5	14.3	21.0	255°	11.5

Humidity, dew point & pressure

Day	Hmin	Hmax	Hmean	Dmin	Dmax	Dmean	Pmin	Pmax	Pmean
1	66	93	81	4.2	10.0	6.5	1005	1009	1007
2	77	95	88	1.3	6.4	3.5	1006	1014	1010
3	56	94	78	2.2	9.9	6.1	1000	1006	1003
4	73	85	79	1.4	6.1	4.1	996	1004	1000
5	57	84	75	-1.2	1.8	0.0	1002	1007	1004
6	71	87	80	-0.5	3.6	1.5	1005	1009	1007
7	45	89	66	-2.9	5.8	0.9	1002	1020	1011
8	67	87	79	-1.3	9.6	5.3	1001	1020	1010
9	58	77	68	-1.8	1.4	-0.4	1006	1014	1010
10	69	84	78	-2.5	0.6	-1.0	1014	1016	1015
11	75	93	84	0.3	7.0	4.2	1001	1016	1008
12	72	94	87	1.5	9.0	4.2	988	1008	998
13	57	96	75	-1.3	10.9	3.2	985	995	990
14	67	80	75	0.0	1.9	0.8	991	998	994
15	65	84	75	0.5	3.4	1.8	988	1001	994
16	77	97	89	-0.1	3.2	1.1	980	1003	992
17	77	95	87	-1.1	3.3	0.6	1003	1014	1008
18	76	92	84	-3.3	1.9	-0.9	1014	1019	1016
19	84	97	94	-3.6	5.9	2.3	1009	1019	1014
20	68	97	83	1.9	6.0	3.6	1011	1020	1016
21	87	98	94	4.1	11.2	8.6	1014	1023	1018
22	80	96	89	7.0	9.4	8.2	1023	1026	1024
23	77	92	85	0.9	9.3	6.8	1008	1024	1016
24	74	86	80	-0.4	6.0	2.4	1022	1032	1027
25	77	87	83	6.0	9.5	7.8	1027	1031	1029
26	72	90	83	5.2	10.7	8.7	1031	1034	1032
27	68	81	71	3.9	5.4	4.9	1027	1035	1031
28	60	87	74	0.5	8.4	4.3	1019	1027	1023
29	69	83	73	0.0	5.5	2.5	1014	1025	1020
30	91	96	80	5.4	10.0	3.5	1009	1020	1014
31	86	96	91	9.8	10.8	10.3	1008	1011	1010

Other measures

Day	Night	Daymax	T+10m	T+1h	H+1h	T-10m	T-1h	H-1h	Fmin	Fmax	Fmean	AF hrs	AQmin	AQmax	AQmean
1	9.6	10.7	0.3	1.2	8	0.1	0.3	5	4.5	12.7	9.7	0	-	-	-
2	2.7	6.9	0.4	1.5	6	0.2	0.7	3	0.0	6.6	3.6	0	-	-	-
3	7.3	11.3	0.2	0.9	5	0.3	0.9	3	4.2	12.1	9.4	0	-	-	-
4	7.3	9.3	0.1	0.6	5	0.2	0.5	3	0.3	9.0	5.6	0	-	-	-
5	2.3	6.9	0.5	1.7	6	0.4	1.3	5	-1.7	5.5	1.4	0	-	-	-
6	2.6	6.6	0.3	1.1	5	0.3	1.0	1	-1.5	6.1	2.0	0	-	-	-
7	5.2	8.7	0.3	1.1	4	0.2	0.8	5	1.0	7.5	4.4	0	-	-	-
8	3.6	12.7	1.0	1.8	6	0.2	0.7	10	0.6	13.7	7.7	0	-	-	-
9	3.7	7.6	0.3	1.1	5	0.2	0.6	5	-1.4	6.5	2.3	0	-	-	-
10	0.3	5.1	0.3	1.3	3	0.2	0.7	4	-3.9	5.0	0.3	0	-	-	-
11	3.0	8.6	0.3	0.9	5	0.3	1.4	4	1.2	8.0	4.8	0	-	-	-
12	2.7	7.9	0.4	1.6	7	0.4	1.5	6	-1.0	7.1	3.6	0	-	-	-
13	6.4	8.0	0.4	1.3	12	0.2	0.9	6	-0.4	13.2	5.4	0	-	-	-
14	4.3	5.9	0.2	0.8	6	0.4	1.4	7	-0.4	4.4	2.1	0	-	-	-
15	4.0	7.9	0.4	1.0	9	0.2	0.7	4	0.0	4.7	2.2	0	-	-	-
16	1.0	3.8	0.2	0.9	7	0.7	2.4	14	-3.2	0.6	-1.0	0	-	-	-
17	0.6	5.1	0.4	1.2	3	0.5	1.6	4	-3.7	1.9	-1.2	0	-	-	-
18	-0.2	4.8	0.4	1.4	4	0.4	0.9	3	-5.5	1.5	-2.5	2	-	-	-
19	-1.3	5.9	0.2	0.9	4	0.3	1.4	5	-6.0	3.4	-0.5	4	-	-	-
20	5.3	7.7	0.3	0.9	4	0.4	1.5	3	2.1	5.1	3.5	0	-	-	-
21	6.1	11.8	0.3	1.1	3	0.1	0.3	2	3.1	13.6	8.9	0	-	-	-
22	8.0	11.9	0.2	1.0	3	0.2	0.6	5	4.8	12.7	9.7	0	-	-	-
23	10.6	11.2	0.1	0.4	9	0.2	0.8	6	-0.8	11.9	8.5	0	-	-	-
24	3.0	7.5	0.3	1.3	3	0.2	0.8	6	-0.8	8.1	3.3	0	-	-	-
25	7.5	11.4	0.1	0.5	3	0.2	1.0	2	4.9	13.0	10.0	0	-	-	-
26	11.5	12.9	0.2	0.5	2	0.2	0.8	5	6.6	14.4	12.4	0	-	-	-
27	9.9	10.4	0.1	0.3	4	0.2	0.7	2	5.1	10.4	9.2	0	-	-	-
28	8.2	10.8	0.2	0.7	3	0.2	0.5	1	1.6	11.1	7.0	0	-	-	-
29	5.0	9.7	0.3	1.1	7	0.1	0.3	0	0.4	8.4	4.2	0	-	-	-
30	5.1	7.3	-	-	-	0.2	0.6	1	-1.4	11.7	4.8	0	-	-	-
31	8.3	12.5	0.2	0.6	3	0.1	0.3	2	11.7	14.1	13.1	0	-	-	-

View daily report for the 1st