Climate Data for Salt Spring and Southern Gulf Islands

Please note that the values given are at sea level and consideration must be given for higher values.

Galiano, Mayne, Pender, Saturna, and surrounding islands

Tabular data on Ground Snow Loads and Wind Effects for the Southern Gulf Islands.

Effective December 15, 2006

Climate Data for Southern Gulf Islands
Ground Snow Load, Ss		1.54 kPa – 2.42 kPa
Rain Load, Sr		0.40 kPa
Wind Effects	Probability 1/10	11.00 psf	0.53 kPa
	Probability 1/30	13.31 psf	0.64 kPa
	Probability 1/100	15.84 psf	0.76 kPa

Climate & Design Data for Salt Spring Island
Climatic Element		Metric	Imperial
January 2.5% Design Temperature (0°)		-6° C	21° F
January 1% Design Temperature (0°)		-8° C	18° F
July 2.5% Design Dry bulb Temp. (0°)		29° C	84° F
July 2.5% Design Wet bulb Temp. (0°)		18° C	64° F
Annual Total Degree – days below 18°C		3318
Mild Climate Indicator (MCI)		4350
Maximum 15 Minute Rainfall		8 mm	0.3 in.
Maximum 1 Day Rainfall		107 mm	4.2 in.
Annual Total Precipitation		1028 mm	40 in.
Moisture Index		1.13
Driving Rain Wind Pressures Pa 1/5		180
Snow Load, Ss		1.8 kPa	37.6 psf
Rain Load, Sr		0.40 kPa	8.36 psf
Part 9 Specified Snow Load, S = Cb(.55)x1.8+.4		1.39 kPa	29.0 psf
Part 4 Specified Snow Load, S = Cb(.8)x1.8+.4		1.84 kPa	38.4 psf
Wind Effects:	Probability (1/10)	0.48 kPa	10 psf
	Probability (1/50)	0.63 kPa	13.2 psf
Seismic Data:	Sa (.2)	1.176
	Sa (.5)	0.787
	Sa (1.0)	0.370
	Sa (2.0)	0.185
	PGA	0.587
Frost Depth		300 mm	12 in.