Tallinn
Estonia
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Tallinn, Estonia

A beautiful summer view of an ancient town in Tallinn, Estonia, with a distant view of the sea
A beautiful summer view of an ancient town in Tallinn, Estonia, with a distant view of the sea
September, the first month of the autumn, in Tallinn, is still a mild month, with temperature in the range of an average low of 7.8°C (46°F) and an average high of 15.2°C (59.4°F).

Temperature

In Tallinn, the average high-temperature decreases, from a pleasant 20.4°C (68.7°F) in August, to a moderate 15.2°C (59.4°F). The average low-temperature, in September, is 7.8°C (46°F).

Humidity

In Tallinn, the average relative humidity in September is 82%.

Rainfall

In Tallinn, during September, the rain falls for 16 days and regularly aggregates up to 60mm (2.4") of precipitation. In Tallinn, during the entire year, the rain falls for 120 days and collects up to 617mm (24.3") of precipitation.

Snowfall

In Tallinn, it doesn't snow. In October, it regularly snows. Throughout the year, in Tallinn, there are 55.1 snowfall days.

Sea temperature

In Tallinn, Estonia, the average seawater temperature in September is 15.8°C (60.4°F).
Note: For swimming, a surface water temperature of 15.8°C (60.4°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

In Tallinn, the average length of the day is 12.8h.

Sunshine

The average sunshine in September is 4.7h.

UV index

In Tallinn, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Tallinn?

In Tallinn, Estonia, in September, the average high-temperature is 15.2°C (59.4°F), and the average low-temperature is 7.8°C (46°F).

What is the average humidity in September in Tallinn?

The average relative humidity in September in Tallinn, Estonia, is 82%.

How many days does it rain in September in Tallinn?

In Tallinn, Estonia, in September, during 16 rainfall days, 60mm (2.4") of precipitation is typically accumulated.

Does it snow in Tallinn in September?

In Tallinn, Estonia, in September, it doesn't snow. In October, it regularly snows.

What is the sea water temperature in September in Tallinn?

In Tallinn, in September, the average water temperature is 15.8°C (60.4°F). For most, swimming in 15.8°C (60.4°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

How many hours of daylight does Tallinn have in September?

In September, the average length of the day in Tallinn, Estonia, is 12.8h.

How many hours of sunshine does Tallinn have in September?

The average sunshine in September in Tallinn, Estonia, is 4.7h.

What is the UV index intensity in September in Tallinn?

In Tallinn, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.
Average temperature in September - Tallinn, Estonia
  • Average high temperature in September: 15.2°C

The warmest month (with the highest average high temperature) is July (21.8°C).
The month with the lowest average high temperature is February (-1.6°C).

  • Average low temperature in September: 7.8°C

The month with the highest average low temperature is July (12.7°C).
The coldest month (with the lowest average low temperature) is February (-7°C).

Average humidity in September - Tallinn, Estonia
  • Average humidity in September: 82%

Months with the highest relative humidity are January, November and December (88%).
The month with the lowest relative humidity is May (69%).

Average rainfall in September - Tallinn, Estonia
  • Average rainfall in September: 60mm

The wettest month (with the highest rainfall) is July (74mm).
The driest month (with the lowest rainfall) is April (30mm).

Average rainfall days in September - Tallinn, Estonia
  • Average rainfall days in September: 16 days

Months with the highest number of rainy days are September and October (16 days).
The month with the lowest number of rainy days is February (3 days).

Average snowfall days in September - Tallinn, Estonia
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (14 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average sea temperature in September - Tallinn, Estonia
  • Average sea temperature in September: 15.8°C

The best month for swimming (with the highest average sea temperature) is August (19.1°C).
Coldest months (with the lowest average sea temperature) are February and March (0.2°C).

Average daylight in September / Average sunshine in September - Tallinn, Estonia
  • Average daylight in September: 12.8h

The month with the longest days is June (Average daylight: 18.5h).
The month with shortest days is December (Average daylight: 6.2h).

  • Average sunshine in September: 4.7h

The month with most sunshine is June (Average sunshine: 10.1h).
The month with least sunshine is December (Average sunshine: 0.5h).

Average UV index in September - Tallinn, Estonia
  • Average UV index in September: 3

Months with the highest UV index are June and July (UV index 5).
Months with the lowest UV index are January, November and December (UV index 0).