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

In Vatican City, the average high-temperature in September gently drops from a tropical 31°C (87.8°F) in August to a warm 26.4°C (79.5°F). During September, the nighttime temperature averages to a refreshing 18.4°C (65.1°F).

Humidity

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

Rainfall

In September, the rain falls for 11.6 days. Throughout September, 46mm (1.81") of precipitation is accumulated. Throughout the year, in Vatican City, there are 132.8 rainfall days, and 561mm (22.09") of precipitation is accumulated.

Snowfall

January, March through December are months without snowfall.

Daylight

In September, the average length of the day is 12h and 29min.
On the first day of September, 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.

Sunshine

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

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In September, the maximum UV index of 5 suggests these recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.

Frequently asked questions

What is the usual temperature for Vatican City in September?

The high-temperature, in September, in Vatican City, records 26.4°C (79.5°F), while the low-temperature is 18.4°C (65.1°F). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is evaluated at 34°C (93.2°F).

What is the average humidity in September?

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

How many days does it rain in September?

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

When it does not snow?

January, March through December are months without snowfall.

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

In September, the average day length in Vatican City is 12h and 29min.

When is the sunrise / sunset in September?

On the first day of September, 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?

The average sunshine duration in September is 10.8h.

How high is the UV index in September?

In Vatican City, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health threat 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).

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).

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).

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%).

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).

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).

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).

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).

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).

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).

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).

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).

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).

Vatican City, Vatican City

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