McLean Weather in September

McLean in September sees high daytime temperatures of 26°C (79°F) and nighttime lows of 16°C (61°F). Rainfall is fairly high this month at around 119 mm (4.7 in), so pack a rain jacket to stay dry.

Rainfall in McLean in September

Looking at the last 30 years, the data shows about 9 days with rain, averaging 119 mm (4.7 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in McLean in September

September in McLean sees highs of 26°C (79°F) and lows of 16°C (61°F) overnight. Overall, the month follows a fairly predictable daily temperature pattern. Nights drop to around 16°C (61°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in McLean in September

Expect a lot of sunshine this month, with about 225 hours of sun. These sunny conditions add to the overall experience.

Wind Speed in McLean in September

Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

If you prefer dry days with pleasant temperatures, April typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.