Bethesda Weather in September

With daytime temperatures of 18°C (64°F) and nighttime lows of 10°C (50°F), September in Bethesda brings moderate temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 99 mm (3.9 in) falls on average.

Rainfall in Bethesda in September

Past climate data indicates that roughly 17 days will see rain, totalling around 99 mm (3.9 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 Bethesda in September

September in Bethesda brings moderate temperatures, with highs of 18°C (64°F) and nights around 10°C (50°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With overnight lows of 10°C (50°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Bethesda in September

The area enjoys a balanced 111 hours of sunlight, ensuring it's neither too overcast nor too sunny.

If you prefer enjoying temperate temperatures and rain-free days, July 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.