Siero Weather in September

Siero in September sees pleasant temperatures, with highs around 21°C (70°F) and overnight lows of 13°C (55°F). Rainfall is fairly high at around 93 mm (3.7 in) on average, so pack waterproofs just in case.

Rainfall in Siero in September

On average, there are about 12 days with rain during this month, averaging 93 mm (3.7 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Siero in September

The temperature in Siero in September is excellent. Daytime highs reach 21°C (70°F), with nights dropping to 13°C (55°F). September is part of summer. Conditions are often most pleasant around the middle of the day. With overnight lows of 13°C (55°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 Siero in September

With about 167 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.

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

Siero Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 21°C (70°F)  

Chance of Rain 39%  

Precipitation 93 mm (3.7 in)  

Rainy days 12 days  

Humidity 78% *  

Sunshine 167 hours *  

Percentage Sunshine *  

* Data from: Oviedo, Spain (14 KM, 9 Miles).

What to Wear in Siero in September

For Siero in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Siero in September

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

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

8/10

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 Spain, check out our Siero's climate page.

More climate data for Siero

Temperature Rainfall Sunshine Humidity

See the full Siero climate overview or explore weather in Spain.