Dumbarton Weather in September

September in Dumbarton brings moderate temperatures, with daytime highs of 17°C (63°F) and nights around 9°C (48°F). Quite a bit of rainfall is expected, around 116 mm (4.6 in), so pack an umbrella.

Rainfall in Dumbarton in September

Historically, approximately 20 days this month are expected to have rain, averaging 116 mm (4.6 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in Dumbarton in September

In September, expect moderate temperatures in Dumbarton, with highs of 17°C (63°F) and lows of 9°C (48°F) at night. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows around 9°C (48°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Dumbarton in September

The month brings about 117 hours of sunlight, offering a comfortable mix of sun and overcast.

If your ideal day consists of dry skies and pleasant temperatures, May, July and August typically offer the best circumstances for Dumbarton.

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Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our Dumbarton's climate page.

Dumbarton Temperature in September

Min Temperature 9°C (48°F)  

Max Temperature 17°C (63°F)  

Chance of Rain 68%  

Precipitation 116 mm (4.6 in)  

Rainy days 20 days  

Humidity 79% *  

Sunshine 117 hours *  

Percentage Sunshine 29% *  

* Data from: Glasgow, Scotland (12 KM, 7 Miles).

What to Wear in Dumbarton in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Dumbarton in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

5/10

Walking

5/10

Camping

3/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our Dumbarton's climate page.

More climate data for Dumbarton

Temperature Rainfall Sunshine Humidity

See the full Dumbarton climate overview or explore weather in the United Kingdom.