Data for Rain Water Harvest Calculations
Penticton / Summerland Weather Statistics Latitude: 49.28N Longitude: 119.36W Altitude: 344m (Source: www.theweathernetwork.com)
Temperature	J	F	M	A	M	J	J	A	S	O	N	D
Maximum	1	4	10	15	20	25	28	28	22	15	7	1
Minimum	-4	-2	0	2	6	10	12	12	8	3	0	-3
Mean	-1	1	5	9	13	18	20	20	15	9	3	0


Precipitation	J	F	M	A	M	J	J	A	S	O	N	D
Rain (mm)	8	12	17	26	33	34	23	28	23	16	18	12
Snow (cm)	26	11	3	0	0	0	0	0	0	0	8	25
Total (mm)	27	21	20	26	33	34	23	28	23	16	24	32
Snow Cover(cm)	5	1	0	0	0	0	0	0	0	0	1	6


Other	J	F	M	A	M	J	J	A	S	O	N	D
Sunshine (h)	-	-	-	-	-	-	-	-	-	147	57	37
Rel.Humidity(%)	75	74	66	58	57	54	52	54	61	67	72	75
Wind Speed(km/h)	15	14	12	11	10	10	10	9	9	11	15	16
Wind Direction	S	S	S	N	N	N	N	N	N	N	S	S


Days When	J	F	M	A	M	J	J	A	S	O	N	D
Temp.<=0°C	25	20	19	10	1	0	0	0	0	9	15	23

Rain >=0.2 mm	4	5	7	8	10	9	7	7	7	7	8	5
Rain >=5 mm	0	0	0	2	2	2	2	2	1	0	1	0
Rain >=10 mm	0	0	0	0	0	1	0	0	0	0	0	0
Rain >=25 mm	0	0	0	0	0	0	0	0	0	0	0	0

Snow >=0.2 cm	9	5	2	0	0	0	0	0	0	0	3	9
Snow >=5 cm	2	0	0	0	0	0	0	0	0	0	0	2
Snow >=10 cm	0	0	0	0	0	0	0	0	0	0	0	0
Snow >=25 cm	0	0	0	0	0	0	0	0	0	0	0	0

Precip.>=0.2 mm	12	9	9	8	10	9	7	7	7	8	10	13
Precip.>=5 mm	2	0	1	2	2	2	2	2	1	0	1	2
Precip.>=10 mm	0	0	0	0	0	1	0	0	0	0	0	0
Precip.>=25 mm	0	0	0	0	0	0	0	0	0	0	0	0

Snow Cover>=1cm	16	7	1	0	0	0	0	0	0	0	2	13
Snow Cover>=5cm	11	5	0	0	0	0	0	0	0	0	0	8
Snow Cover>=10cm	6	4	0	0	0	0	0	0	0	0	0	4
Snow Cover>=20cm	2	1	0	0	0	0	0	0	0	0	0	1
Snow Cover>=50cm	0	0	0	0	0	0	0	0	0	0	0	0


Potential Rain Water Harvest for Average Home
Rain Catchment (litres)	J	F	M	A	M	J	J	A	S	O	N	D
125 litres / mm / rooftop	3375	2625	2500	3250	4125	4250	2875	3500	2875	2000	3000	4000
(see reference below)

References:	Catchment per Square Meter = Rainfall (mm) X Roof Footprint (sq m) X litre / 1,000,000 cu mm X 1,000,000 sq mm / sq m "One Litre per Sq Meter"
	Average Footprint = 30 ft X 40 ft (with 2 ft overhang) 32 X 42 = 1344 sq ft 1344 / 9 (sq ft / yd) = 149 / 1.2 (sq m /yd) = 125 sq m
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