Fully, Switzerland — Weather in September 2026

Climate Overview

Fully, Switzerland in September has warm conditions, with highs averaging 21.7°C (71°F). Rain falls on about 15 days this month, totalling around 147 mm. Temperatures drop noticeably between day and night.

This month falls at the beginning of Autumn.

Daily highs in September gradually drop from around 24°C (74°F) at the start to 20°C (67°F) by month's end.

September sees fairly even rainfall, totalling about 147 mm across the month.

Expect around 9.7h of sunshine at the start of September, decreasing to 8.6h by the end.

The warmest days tend to fall around the 5th, averaging 24°C (75°F).

Compared to August, this month is about 4°C cooler with 0 fewer rainy days. Temperatures begin dropping heading into October.

Monthly September Averages

Temperature

22°C / 12°C

Feels Like

23°C / 11°C

Rain

15 days · 147 mm

Sunshine

9.1h / day

Humidity

82% — Very Humid

Wind

6 km/h

Wind Direction

E (101°)

Gusts

32 km/h

Daylight

12.5 h

Cloud Cover

63%

Clear Sky Days

2.5

UV Index

4.8 — Moderate

Dew Point

14°C — Comfortable

Moon Phase

Waxing Crescent · 11%

Snow Days

2 days · 3 cm

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 07:11

Daylight 12.6h

Sunset 19:46

What to Expect

Daytime temperatures around 22°C (71°F) are ideal for full-day outdoor exploration. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.

2 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	5°C / -5°C	2°C / -9°C	14days (159 mm) Wet	5.7h Fair	75% Muggy	1.9 Low	Poor	View Details
February	8°C / -2°C	6°C / -5°C	12days (108 mm) Wet	7.1h Good	76% Humid	2.8 Moderate	Poor	View Details
March	11°C / 1°C	9°C / -2°C	14days (126 mm) Wet	8.8h Good	76% Humid	4.3 Moderate	Poor	View Details
April	14°C / 5°C	13°C / 3°C	15days (127 mm) Wet	10.7h Excellent	74% Muggy	5.7 High	Fair	View Details
May	18°C / 8°C	18°C / 7°C	21days (206 mm) Wet	10.5h Excellent	80% Humid	6 High	Wet	View Details
June best	24°C / 14°C	27°C / 14°C	19days (205 mm) Wet	11.7h Excellent	79% Humid	7.1 Very High	Wet	View Details
July best	26°C / 16°C	29°C / 17°C	18days (210 mm) Wet	12.1h Excellent	78% Humid	7.1 Very High	Excellent	View Details
August best	26°C / 15°C	29°C / 16°C	15days (163 mm) Wet	11.1h Excellent	78% Humid	6.4 High	Excellent	View Details
September best	22°C / 12°C	23°C / 11°C	15days (147 mm) Wet	9.1h Good	82% Humid	4.8 Moderate	Good	View Details
October best	18°C / 7°C	18°C / 6°C	13days (124 mm) Wet	7.6h Good	81% Humid	3.3 Moderate	Good	View Details
November	11°C / 1°C	9°C / -2°C	14days (142 mm) Wet	6.1h Fair	80% Humid	2.1 Moderate	Poor	View Details
December	6°C / -4°C	4°C / -7°C	14days (176 mm) Wet	5.1h Fair	76% Humid	1.6 Low	Poor	View Details

What to Wear

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.

Temperatures drop significantly at night, so pack layers you can add or remove throughout the day.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

Warm evening layerUmbrellaWaterproof jacketWaterproof shoesSunscreen (SPF 30+)Sunglasses

Frequently Asked Questions

Expand all

Is September a good time to visit Fully?

September is typically good for visiting Fully, with average highs of 22°C (71°F) and around 15 rainy days. Fully, Switzerland in September has warm conditions, with highs averaging 21.7°C (71°F). Rain falls on about 15 days thi

Does it rain a lot in Fully in September?

Fully typically sees around 15 rainy days in September with 147 mm (5.8 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Fully in September?

Nights in Fully during September are cool at around 12°C (53°F). Bring a jacket or sweater for evenings.

What should I pack for Fully in September?

With highs of 22°C (71°F) and lows of 12°C (53°F) in September, we recommend: Warm evening layer, Umbrella, Waterproof jacket, Waterproof shoes, Sunscreen (SPF 30+). Comfortable walking shoes are essential.

Is September among the best months weather-wise in Fully?

Yes, September offers some of the best weather conditions in Fully with comfortable temperatures and lower chances of rain.

What is the UV index in Fully in September?

The average UV index in Fully during September is 5 (moderate). Sunscreen and sunglasses are recommended during midday hours.

How many hours of daylight are there in Fully in September?

Fully gets approximately 13 hours of daylight per day in September, with around 9 hours of sunshine.

Does it snow in Fully in September?

Yes, Fully typically sees around 2 snow days in September with roughly 3 cm (1 in) of snowfall.

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