St James Weather in September

September in St James averages 17°C (63°F) during the day and 13°C (55°F) at night. Around 56 mm (2.2 in) of rainfall is typical for this time of year.

Rainfall in St James in September

Past climate data indicates that roughly 11 days will see rain, totalling around 56 mm (2.2 in) for the month. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.

Temperature in St James in September

In September, expect moderate temperatures in St James, with highs of 17°C (63°F) and lows of 13°C (55°F) at night. Conditions are often most pleasant around the middle of the day. Nights cool down to 13°C (55°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in St James in September

Expect sunny days throughout the month, with an estimated 225 hours of sunshine. This makes it a pleasant time to visit St James.

Wind Speed in St James in September

Wind speeds average 5 m/s (10 knots) during September. At this speed, gentle to moderate breezes make small trees sway and the wind creates whitecaps on water bodies. Daily variations range from moderate winds to stronger breezes, creating excellent conditions for sailing, kite flying and wind sports.

Average water temperature in September

The water is 15°C (59°F) this month, cool enough to feel refreshing on a warm day, but cold enough that most people won't stay in for long without a wetsuit.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March, April, November and December typically offer the best weather for St James.