Union City Weather in September

September in Union City typically sees daytime highs of 25°C (77°F) and nighttime lows of 17°C (63°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Union City in September

Looking at the last 30 years, the data shows about 9 days with rain, averaging 93 mm (3.7 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 Union City in September

If you're visiting Union City in September, expect excellent temperatures with highs of 25°C (77°F) and overnight lows of 17°C (63°F). Overall, the month follows a fairly predictable daily temperature pattern. Nights drop to around 17°C (63°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 Union City in September

There are approximately 218 hours of sunshine this month, resulting in mostly clear days.

Wind Speed in Union City in September

Average wind conditions reach 5 m/s (10 knots) in September. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.

Average water temperature in September

At 20°C (68°F), the water is pleasant for swimming. Most people find this range ideal, cool enough to be refreshing, warm enough to stay in comfortably.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. September typically offers the best weather for Union City.