Isle of Portland
Climate

Isle of Portland

Section Title: Climate
Table Section Text: None

Climate data for Isle of Portland climatic averages

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year

Average high °C (°F)	8.4 (47.1)	8.0 (46.4)	9.4 (48.9)	11.5 (52.7)	14.3 (57.7)	16.8 (62.2)	18.8 (65.8)	19.3 (66.7)	17.8 (64.0)	14.8 (58.6)	11.6 (52.9)	9.2 (48.6)	13.4 (56.1)

Daily mean °C (°F)	6.6 (43.9)	6.0 (42.8)	7.3 (45.1)	9.0 (48.2)	11.7 (53.1)	14.3 (57.7)	16.4 (61.5)	16.9 (62.4)	15.4 (59.7)	12.8 (55.0)	9.7 (49.5)	7.3 (45.1)	11.2 (52.2)

Average low °C (°F)	4.7 (40.5)	4.0 (39.2)	5.2 (41.4)	6.4 (43.5)	9.1 (48.4)	11.8 (53.2)	14.0 (57.2)	14.5 (58.1)	13.0 (55.4)	10.8 (51.4)	7.7 (45.9)	5.4 (41.7)	8.9 (48.0)

Average rainfall mm (inches)	67.3 (2.65)	53.1 (2.09)	52.3 (2.06)	46.9 (1.85)	44.1 (1.74)	39.3 (1.55)	35.1 (1.38)	41.4 (1.63)	46.9 (1.85)	81.6 (3.21)	81.6 (3.21)	78.2 (3.08)	667.9 (26.30)

Average rainy days (≥ 1 mm)	12.4	9.8	9.6	8.5	8.2	6.6	6.6	7.1	7.8	11.5	12.4	12.0	112.5

Mean monthly sunshine hours	64.6	86.7	126.3	191.0	225.0	226.5	236.9	218.0	167.2	115.1	82.0	59.7	1,798.9

Source: 1981–2010 averages for the Isle of Portland climate station and Weymouth Cefas station. Sources: Met Office and Cefas

Sentence(s)