Climate - Marion Island (South Africa)

The climate of the Prince Edward Islands is subpolar oceanic, rainy and windy all year round.
The two islands, called Marion Island and Prince Edward Island, are located in the Indian Ocean, at the 46th parallel, and belong to the municipality of Cape Town (South Africa). We are in the area where the westerly winds blow intense.
Marion Island is the largest, and in the interior there are mountains up to 1,230 meters (4,035 feet) high, while on the island of Prince Edward the altitude reaches 660 meters (2,165 feet). On Marion Island, above 1,000 meters (3,300 feet), there are perennial snows, which however are retreating due to global warming (until a few decades ago there was a real glacier).
However, it can sometimes snow at sea level even in midsummer.
In winter it often snows, but the snow tends to melt because, during the day, the temperature almost always exceeds freezing.

The average temperature of the coldest month (August) is of 4.4 °C (39.9 °F), that of the warmest month (February) is of 9.2 °C (48.6 °F). Here are the average temperatures.
Precipitation amounts to 2400 millimeters (94.5 inches) per year: it is therefore abundant. It ranges from 170 mm (6.7 in) in the driest months (October, November) to 230 mm (9.1 in) in the wettest one (May). Here is the average precipitation.
On average, there are around 1360 sunshine hours per year. Here are the average sunshine hours per day.

Marion Island - Weather by month

Based on the period 1991-2020
(January - February - March - April - May - June - July - August - September - October - November - December)

In January, the average temperature is of 8.7 °C (48 °F), with a minimum of 4.9 °C (40.9 °F) and a maximum of 12.4 °C (54.3 °F).
On the coldest nights of the month, the temperature usually drops to around 1 °C (33.5 °F). However, in January 2005, it dropped to -1.5 °C (29.3 °F).
On the warmest days of the month, the temperature usually reaches around 18 °C (64 °F). However, in January 2005, it reached 24.8 °C (76.6 °F).
Precipitation amounts to 220 mm (8.7 in), distributed over 21 days.
On average, there are 160 hours of sunshine per month, i.e. 5 hours per day.
The average humidity is 80%.
The average wind speed is 27 kph (17 kph).

In February, the warmest month of the year, the average temperature is of 9.2 °C (49 °F), with a minimum of 5.4 °C (41.8 °F) and a maximum of 13 °C (55.4 °F).
On the coldest nights of the month, the temperature usually drops to around 1.5 °C (34.5 °F). However, in February 1996, it dropped to -0.1 °C (31.8 °F).
On the warmest days of the month, the temperature usually reaches around 18.5 °C (65 °F). However, in February 1996, it reached 21.9 °C (71.4 °F).
Precipitation amounts to 195 mm (7.7 in), distributed over 18 days.
On average, there are 135 hours of sunshine per month, i.e. 5 hours per day.
The average humidity is 81%.
The average wind speed is 26 kph (16 kph).

In March, the average temperature is of 8.4 °C (47 °F), with a minimum of 4.8 °C (40.7 °F) and a maximum of 12 °C (53.6 °F).
On the coldest nights of the month, the temperature usually drops to around 1 °C (33.5 °F). However, in March 2009, it dropped to -2.5 °C (27.5 °F).
On the warmest days of the month, the temperature usually reaches around 17.5 °C (63.5 °F). However, in March 2002, it reached 22.5 °C (72.5 °F).
Precipitation amounts to 215 mm (8.5 in), distributed over 19 days.
On average, there are 115 hours of sunshine per month, i.e. 3.5 hours per day.
The average humidity is 80%.
The average wind speed is 27 kph (17 kph).

In April, the average temperature is of 7.4 °C (45 °F), with a minimum of 3.8 °C (38.9 °F) and a maximum of 11 °C (51.7 °F).
On the coldest nights of the month, the temperature usually drops to around 0 °C (32 °F). However, in April 2009, it dropped to -1.7 °C (28.9 °F).
On the warmest days of the month, the temperature usually reaches around 16 °C (61 °F). However, in April 2018, it reached 23.4 °C (74.1 °F).
Precipitation amounts to 220 mm (8.7 in), distributed over 20 days.
On average, there are 90 hours of sunshine per month, i.e. 3 hours per day.
The average humidity is 82%.
The average wind speed is 27 kph (17 kph).

In May, the average temperature is of 6.2 °C (43 °F), with a minimum of 2.7 °C (36.9 °F) and a maximum of 9.6 °C (49.3 °F).
On the coldest nights of the month, the temperature usually drops to around -1 °C (30.5 °F). However, in May 1993, it dropped to -2.4 °C (27.7 °F).
On the warmest days of the month, the temperature usually reaches around 14.5 °C (58.5 °F). However, in May 2018, it reached 25.6 °C (78.1 °F).
Precipitation amounts to 230 mm (9.1 in), distributed over 22 days.
On average, there are 80 hours of sunshine per month, i.e. 2.5 hours per day.
The average humidity is 82%.
The average wind speed is 29 kph (18 kph).

In June, the average temperature is of 5.0 °C (41 °F), with a minimum of 1.8 °C (35.2 °F) and a maximum of 8.3 °C (46.9 °F).
On the coldest nights of the month, the temperature usually drops to around -2 °C (28 °F). However, in June 2013, it dropped to -3.6 °C (25.5 °F).
On the warmest days of the month, the temperature usually reaches around 12.5 °C (55 °F). However, in June 2004, it reached 18.2 °C (64.8 °F).
Precipitation amounts to 205 mm (8.1 in), distributed over 23 days.
On average, there are 60 hours of sunshine per month, i.e. 2 hours per day.
The average humidity is 83%.
The average wind speed is 29 kph (18 kph).

In July, the average temperature is of 4.7 °C (40 °F), with a minimum of 1.4 °C (34.6 °F) and a maximum of 7.9 °C (46.3 °F).
On the coldest nights of the month, the temperature usually drops to around -2.5 °C (27 °F). However, in July 2004, it dropped to -4.6 °C (23.7 °F).
On the warmest days of the month, the temperature usually reaches around 12.5 °C (55 °F). However, in July 1994, it reached 21 °C (69.8 °F).
Precipitation amounts to 195 mm (7.7 in), distributed over 23 days.
On average, there are 65 hours of sunshine per month, i.e. 2 hours per day.
The average humidity is 82%.
The average wind speed is 31 kph (20 kph).

In August, the coldest month of the year, the average temperature is of 4.4 °C (40 °F), with a minimum of 1.2 °C (34.1 °F) and a maximum of 7.6 °C (45.6 °F).
On the coldest nights of the month, the temperature usually drops to around -3 °C (26.5 °F). However, in August 1995, it dropped to -5.4 °C (22.3 °F).
On the warmest days of the month, the temperature usually reaches around 11.5 °C (52.5 °F). However, in August 1997, it reached 19.9 °C (67.8 °F).
Precipitation amounts to 185 mm (7.3 in), distributed over 22 days.
On average, there are 90 hours of sunshine per month, i.e. 3 hours per day.
The average humidity is 82%.
The average wind speed is 30 kph (19 kph).

In September, the average temperature is of 4.4 °C (40 °F), with a minimum of 1.1 °C (33.9 °F) and a maximum of 7.8 °C (46.1 °F).
On the coldest nights of the month, the temperature usually drops to around -3.5 °C (25.5 °F). However, in September 2004, it dropped to -6.9 °C (19.6 °F).
On the warmest days of the month, the temperature usually reaches around 12.5 °C (54.5 °F). However, in September 1997, it reached 19.1 °C (66.4 °F).
Precipitation amounts to 185 mm (7.3 in), distributed over 21 days.
On average, there are 105 hours of sunshine per month, i.e. 3.5 hours per day.
The average humidity is 81%.
The average wind speed is 30 kph (19 kph).

In October, the average temperature is of 5.6 °C (42 °F), with a minimum of 2.1 °C (35.8 °F) and a maximum of 9 °C (48.2 °F).
On the coldest nights of the month, the temperature usually drops to around -2 °C (28.5 °F). However, in October 1991, it dropped to -3.5 °C (25.7 °F).
On the warmest days of the month, the temperature usually reaches around 14 °C (57 °F). However, in October 2017, it reached 19.5 °C (67.1 °F).
Precipitation amounts to 170 mm (6.7 in), distributed over 19 days.
On average, there are 140 hours of sunshine per month, i.e. 4.5 hours per day.
The average humidity is 81%.
The average wind speed is 29 kph (18 kph).

In November, the average temperature is of 6.6 °C (44 °F), with a minimum of 2.9 °C (37.2 °F) and a maximum of 10.2 °C (50.4 °F).
On the coldest nights of the month, the temperature usually drops to around -0.5 °C (31 °F). However, in November 2004, it dropped to -3.9 °C (25 °F).
On the warmest days of the month, the temperature usually reaches around 15 °C (59.5 °F). However, in November 2019, it reached 20.1 °C (68.2 °F).
Precipitation amounts to 170 mm (6.7 in), distributed over 19 days.
On average, there are 160 hours of sunshine per month, i.e. 5.5 hours per day.
The average humidity is 80%.
The average wind speed is 28 kph (17 kph).

In December, the average temperature is of 7.7 °C (46 °F), with a minimum of 4 °C (39.3 °F) and a maximum of 11.3 °C (52.3 °F).
On the coldest nights of the month, the temperature usually drops to around 0 °C (32 °F). However, in December 1991, it dropped to -1 °C (30.2 °F).
On the warmest days of the month, the temperature usually reaches around 16.5 °C (61.5 °F). However, in December 2012, it reached 21.9 °C (71.4 °F).
Precipitation amounts to 205 mm (8.1 in), distributed over 20 days.
On average, there are 160 hours of sunshine per month, i.e. 5 hours per day.
The average humidity is 79%.
The average wind speed is 29 kph (18 kph).