Monthly Weather Data Derbyshire Lane Sheffield South Yorkshire Dec 1999
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	Max Temp	Min Temp	Dry Bulb	Wet Bulb	Grass Min	Soil Temp	Barometer	Rain	Humidity	Max Gust	Average	Force	Win Dir	Comments
Day	Deg F	Deg F	Deg F	Deg F	Deg F	Deg F	Inches	MM	Percent	MPH	MPH	Beaufort
1	50.5	46.6	48.2	43.7	41.0	45.3	30.07	4.7	67				W
2	54.1	35.7	38.1	37.0	33.2	43.7	30.18	15.0	90				SW	Rain and some sleet
3	50.9	36.9	47.3	44.1	33.9	44.2	29.41	10.5	75				W	Rain and gales fleet and some hail
4	41.9	32.9	36.3	34.7	30.5	41.9	29.79	3.6	84				NNW	Snow rain and some sun
5	53.2	32.0	33.8	32.0	20.2	39.9	30.22	1.1	81				S	Icy ground
6	55.4	32.6	52.0	48.2	25.9	41.4	29.87	2.3	74				WSW
7	48.2	42.8	45.5	44.6	37.9	44.8	29.75	0.4	93				W
8	48.2	38.0	43.7		31.8	42.8	29.53	2.0					SW	Rain and sleet windy
9	46.4	39.5	41.5	38.3	35.3	41.7	29.13	3.8	72				SW
10	48.7	40.0	42.8	40.3	34.5	41.7	29.45	6.9	79				W
11	50.0	35.0	48.7	47.5	32.2	41.5	29.21	10.0	91				SW	Very heavy rain
12	44.1	40.1	41.9	41.0	35.8	42.4	29.20	2.5	92				NW
13	40.3	35.6	37.0	35.2	30.0	41.4	29.63	3.5	83				SW	Rain then snow brighter later
14	38.3	29.1	31.1	29.7	22.0	40.1	29.53	6.1	83				N	Snow less than 1 cm
15	41.7	29.6	33.8	33.1	22.6	39.2	30.11	1.4	92				N	Snow depth 4 cm
16	50.9	31.6	40.1	38.7	30.0	38.8	30.23	12.5	87				NW	Less than half cover
17	52.3	39.0	50.9	50.0	31.4	40.1	29.65	0.2	94				NW
18	37.4	27.0	29.1	27.0	13.8	38.8	30.05	0.1	73				NE	Ground frozen
19	36.5	26.6	29.7	27.5	12.9	36.5	30.17	0.0	82				N	Ground frozen sun a.m.
20	35.6	22.8	26.2		10.4	35.2	30.33	4.2					NW	Ground frozen sun AM
21	41.5	25.1	34.7	33.8	17.0	34.9	30.11	0.3	91				S	Less than half cover
22	51.8	33.7	40.1	39.2	31.2	34.9	29.95	2.5	92				S	Snow depth 1 cm
23	49.5	38.0	40.1	38.3	34.5	36.3	29.92	7.7	84				SW
24	55.6	40.2	46.0	42.4	34.9	38.8	29.49	15.3	72				SW
25	42.8	37.0	38.5	34.9	32.6	40.3	29.11	3.8	66				W
26	42.8	35.0	37.4	36.3	30.8	38.8	29.09	3.0	89				W
27	42.3	35.0	40.3	37.9	31.1	38.5	29.36	0.1	79				W
28	40.3	32.0	34.0	32.9	19.0	37.4	29.63	0.1	88				NW
29	41.9	32.7	37.4	34.9	23.2	36.3	30.00	1.1	76				NW
30	42.3	34.0	39.2	38.3	22.0	36.0	30.00	1.5	92				W
31	50.0	37.0	41.0	40.3	29.6	37.0	30.05	0.6	94				SW
Total	1425.4	1073.1			871.2	1230.6		126.8	2415.0	0.0	0.0	0.0
Ave	46.0	34.6			28.1	39.7		4.1	83.3	#DIV/0!	#DIV/0!	#DIV/0!
								153.0%
	N	3.0			Number of Air Frosts			7.0		Red indicates as Snow
	NNE	0.0			Number of Ground Frosts			20.0		Light green Sleet
	NE	1.0			Days of measurable Rain			30.0		Blue Trace Conditions
	ENE	0.0			Days of rain greater than 10 mm			4.0		Purple Indicates Freezing Rain
	E	0.0			Days when gusts exceeded 50 mph			0.0
	ESE	0.0			Days when average Max exceeded			16.0
	SE	0.0			Days below average Max			15.0
	SSE	0.0			Days above average Min			13.0
	S	3.0			Days below average Min			17.0
	SSW	0.0
	SW	8.0			1st seven day average			43.8	6.6
	WSW	1.0			2nd Seven day average			41.0	5.0
	W	8.0			3rd seven day average			35.5	2.0
	WNW	0.0			4th seven day avaerage			41.1	5.1
	NW	6.0			Final few days average			39.7	4.3
	NNW	1.0			Overall Average			40.2	4.6