September weather forecast
Tallinn, Estonia

A beautiful summer view of an ancient town in Tallinn, Estonia
A beautiful summer view of an ancient town in Tallinn, Estonia

Weather in September

September, the first month of the autumn in Tallinn, is also a moderate month, with an average temperature varying between 15.2°C (59.4°F) and 7.8°C (46°F).

Temperature

In September, 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). In September, the average low-temperature is 7.8°C (46°F).

Humidity

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 (2.36") of precipitation. Throughout the year, there are 120 rainfall days, and 617mm (24.29") of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Tallinn.

Sea temperature

In September, the average sea temperature is 15.8°C (60.4°F).
Note: Swimming in 15.8°C (60.4°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

Daylight

In Tallinn, the average length of the day in September is 12h and 51min.
On the first day of September, sunrise is at 06:17 and sunset at 20:24. On the last day of the month, sunrise is at 07:23 and sunset at 18:58 EEST.

Sunshine

The average sunshine in September in Tallinn is 4.7h.

UV index

In September, the average daily maximum UV index in Tallinn is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The average daily UV index of 3 in September transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Tallinn?

In September, in Tallinn, 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?

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

How much does it rain in Tallinn in September?

In Tallinn, during September, the rain falls for 16 days and regularly aggregates up to 60mm (2.36") of precipitation.

When it does not snow in Tallinn?

June through September are months without snowfall.

Does it snow in Tallinn in September?

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

What is the sea temperature in September in Tallinn?

In Tallinn, Estonia, in September, the average water temperature is 15.8°C (60.4°F). 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).

What is the average length of the day in September in Tallinn?

The average day length in September in Tallinn is 12h and 51min.

What time are sunrise and sunset in September in Tallinn?

On the first day of September, sunrise is at 06:17 and sunset at 20:24. On the last day of the month, sunrise is at 07:23 and sunset at 18:58 EEST.

How many hours of sunshine does Tallinn have in September?

In Tallinn, Estonia, the average sunshine duration in September 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 medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average UV index

Average temperature in September
Tallinn, Estonia

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).

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Average humidity in September
Tallinn, Estonia

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

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

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Average rainfall in September
Tallinn, Estonia

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 least rainfall) is April (30mm).

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Average rainfall days in September
Tallinn, Estonia

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

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

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Average snowfall days in September
Tallinn, Estonia

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).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in September
Tallinn, Estonia

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).
The coldest months (with the lowest average sea temperature) are February and March (0.2°C).

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Average daylight in September /
Average sunshine in September
Tallinn, Estonia

Average daylight in September / Average sunshine in September - Tallinn, Estonia
  • Average daylight in September: 12h and 51min

The month with the longest days is June (Average daylight: 18h and 31min).
The month with the shortest days is December (Average daylight: 6h and 13min).

  • Average sunshine in September: 4h and 42min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 0h and 30min).

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Average UV index in September
Tallinn, Estonia

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

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

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