September weather forecast
Vatican City, Vatican City

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The famous artistic St. Peter
The famous artistic St. Peter's Square in the Vatican, with the rest of the Vatican City in Rome, Italy

Weather in September

September ushers in a change, as Vatican City transitions from summer to autumn. The varying temperatures cool down slightly, ranging from 18.4°C (65.1°F) to a comfortable 26.4°C (79.5°F). The rainfall increases to feature 46mm (1.81") over 11.6 days, a steep climb from the sparse summer precipitations. Despite a moderate resurgence of cloud cover to 18%, daylight hours trend downwards, slipping to 12.5 hours on average. The optimal weather contributes to the appeal of experiencing Vatican City's wonderous sites in September.

Temperature

The beginning of September in Vatican City brings a minor change in the average high-temperature, shifting from a tropical 31°C (87.8°F) in August to a moderately hot 26.4°C (79.5°F). Throughout the month of September, the average temperature in Vatican City dips to a refreshing 18.4°C (65.1°F) at night.

Humidity

In Vatican City, the average relative humidity in September is 64%.

Rainfall

In Vatican City, Vatican City, during September, the rain falls for 11.6 days and regularly aggregates up to 46mm (1.81") of precipitation. In Vatican City, Vatican City, during the entire year, the rain falls for 132.8 days and collects up to 561mm (22.09") of precipitation.

Snowfall

In Vatican City, snow does not fall in January, March through December.

Daylight

The average length of the day in September is 12h and 29min.
On the first day of the month, sunrise is at 06:36 and sunset at 19:43. On the last day of September, sunrise is at 07:06 and sunset at 18:53 CEST.

Sunshine

The average sunshine in September is 10.8h.

UV index

In Vatican City, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: An average maximum UV index of 5 in September leads to these recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
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Frequently asked questions

What is the average September temperature in Vatican City?

Vatican City in September has an average high-temperature of 26.4°C (79.5°F) and an average low-temperature of 18.4°C (65.1°F). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, is appraised at 34°C (93.2°F).

What is the average humidity in September in Vatican City?

In September, the average relative humidity in Vatican City, Vatican City, is 64%.

How many days does it rain in September in Vatican City?

In Vatican City, Vatican City, in September, during 11.6 rainfall days, 46mm (1.81") of precipitation is typically accumulated.

When it does not snow in Vatican City?

January, March through December are months without snowfall.

What is the average length of the day in September in Vatican City?

The average day length in September is 12h and 29min.

What time are sunrise and sunset in September in Vatican City?

On the first day of September in Vatican City, sunrise is at 06:36 and sunset at 19:43. On the last day of the month, sunrise is at 07:06 and sunset at 18:53 CEST.

How many hours of sunshine does Vatican City have in September?

In Vatican City, Vatican City, the average sunshine duration in September is 10.8h.

What is the UV index reading in September in Vatican City?

In Vatican City, Vatican City, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in September
Vatican City, Vatican City

Average temperature in September - Vatican City, Vatican City
  • Average high temperature in September: 26.4°C

The warmest month (with the highest average high temperature) is August (31°C).
The month with the lowest average high temperature is January (11.9°C).

  • Average low temperature in September: 18.4°C

The month with the highest average low temperature is August (21.6°C).
The coldest month (with the lowest average low temperature) is January (6.2°C).

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Average pressure in September
Vatican City, Vatican City

Average pressure in September - Vatican City, Vatican City
  • Average pressure in September: 1015.7mbar

The month with the highest atmospheric pressure is December (1018.5mbar).
The month with the lowest atmospheric pressure is April (1014mbar).

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Average wind speed in September
Vatican City, Vatican City

Average wind speed in September - Vatican City, Vatican City
  • Average wind speed in September: 9.6km/h

The windiest month (with the highest average wind speed) is February (13.2km/h).
The calmest month (with the lowest average wind speed) is August (9.1km/h).

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Average humidity in September
Vatican City, Vatican City

Average humidity in September - Vatican City, Vatican City
  • Average humidity in September: 64%

The months with the highest relative humidity are January and November (74%).
The month with the lowest relative humidity is August (57%).

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Average rainfall in September
Vatican City, Vatican City

Average rainfall in September - Vatican City, Vatican City
  • Average rainfall in September: 46mm

The wettest month (with the highest rainfall) is November (113mm).
The driest month (with the least rainfall) is August (12mm).

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Average rainfall days in September
Vatican City, Vatican City

Average rainfall days in September - Vatican City, Vatican City
  • Average rainfall days in September: 11.6 days

The month with the highest number of rainy days is November (14.6 days).
The month with the least rainy days is August (5.1 days).

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Average snowfall in September
Vatican City, Vatican City

Average snowfall in September - Vatican City, Vatican City
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (4mm).
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0mm).

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Average snowfall days in September
Vatican City, Vatican City

Average snowfall days in September - Vatican City, Vatican City
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in September /
Average sunshine in September
Vatican City, Vatican City

Average daylight in September / Average sunshine in September - Vatican City, Vatican City
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in September: 10h and 5min

The months with the most sunshine are June, July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).

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Average sunshine days in September
Vatican City, Vatican City

Average sunshine days in September - Vatican City, Vatican City
  • Average sunshine days in September: 16 days

The month with the most sunshine days is August (23.9 days).
The month with the least sunshine days is February (13.3 days).

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Average UV index in September
Vatican City, Vatican City

Average UV index in September - Vatican City, Vatican City
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).

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Average cloud cover in September
Vatican City, Vatican City

Average cloud cover in September - Vatican City, Vatican City
  • Average cloud cover in September: 18

The month with the most cloud cover is January (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 9).

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Average visibility in September
Vatican City, Vatican City

Average visibility in September - Vatican City, Vatican City
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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Vatican City, Vatican City

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