Weather Averages for Saint Helena Island, St. Helena

7-day Forecast / 10-day Forecast

Latitude: 15°56'S, Longitude: 5°40'W, Elevation: 1430.0 ft, Distance: 3.20 mi Saint Helena Island, St. Helena Averages »

	Unit	Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average temperature over 17 years	°F	64	68	69	69	69	66	64	62	60	62	62	62	64
Average high temperature over 17 years	°F	66	71	71	71	71	69	66	64	62	64	64	64	68
Average low temperature over 17 years	°F	62	64	66	66	66	64	62	60	59	59	59	60	62
Highest recorded temperature over 17 years	°F	89	89	84	87	89	84	82	80	80	80	77	80	82
Lowest recorded temperature over 17 years	°F	51	59	60	60	60	57	53	53	51	53	51	55	57
Average dew point over 11 years	°F	59	62	64	64	62	60	57	55	55	55	55	57	59
Average number of days with thunderstorms over 14 years	days	1	-	-	-	-	-	-	-	-	-	-	-	-
Average number of days with fog over 14 years	days	48	4	5	4	3	2	4	4	5	5	4	4	4
Average morning relative humidity over 14 years	%	87	89	90	89	88	85	84	84	85	85	86	87	87
Average evening relative humidity over 7 years	%	77	76	76	77	78	77	77	78	79	78	78	77	75
Average wind speed over 11 years	mph	16.0	14.0	14.0	16.0	14.0	14.0	16.0	17.0	17.0	17.0	17.0	16.0	16.0
Average number of days with precipitation over 14 years	days	212	15	18	18	15	16	16	18	20	18	21	19	18
Average number of days with blowing dust/sand over 14 years	days	60	4	5	5	4	3	5	6	6	7	5	5	5
Average number of days with smoke/haze over 14 years	days	9	-	-	-	1	1	1	2	1	1	1	1	-
Average number of days above 85°F over 17 years	days	1	-	-	-	-	-	-	-	-	-	-	-	-
Average number of days below 75°F over 17 years	days	365	31	28	31	30	31	30	31	31	30	31	30	31
Average number of days below 65°F over 17 years	days	272	20	5	4	9	22	30	31	31	30	31	30	30
Average number of days with vision obstruction over 14 years	days	60	4	5	5	4	3	5	6	6	7	5	5	5

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