September weather - Autumn 2024

Weather in September
Frequently asked questions
Average temperature in September
Average humidity in September
Average rainfall in September
Average rainfall days in September
Average snowfall days in September
Average sea temperature in September
Average daylight in September
Average sunshine in September
Average UV index in September

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

Weather in September

In September, the tell-tale signs of the upcoming autumn season start to become apparent. As the leaves begin to change their hues, a chilly undercurrent threads through Tallinn's weather. Despite the noticeable decline in temperatures compared to August, September remains a favoured time for sightseeing and outdoor activities. The onset of autumn is accompanied by more frequent rain showers, becoming a common sight.

Temperature

In September, the average high-temperature goes from a pleasant 20.4°C (68.7°F) in August to a moderate 15.2°C (59.4°F). Tallinn usually reports an average low-temperature of 7.8°C (46°F) during the month of September.

Humidity

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

Rainfall

In Tallinn, during September, the rain falls for 16 days and regularly aggregates up to 60mm (2.36") of precipitation. In Tallinn, during the entire year, the rain falls for 120 days and collects up to 617mm (24.29") of precipitation.

Snowfall

June through September are months without snowfall.

Sea temperature

In September, the average sea temperature is 15.8°C (60.4°F).
Note: Most people do not enjoy swimming in water that is 15.8°C (60.4°F). Breathing becomes increasingly challenging as the water temperature dips under 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 in Tallinn, sunrise is at 06:18 and sunset at 20:22. On the last day of the month, sunrise is at 07:25 and sunset at 18:56 EEST.

Sunshine

The average sunshine in September in Tallinn is 4.7h.

UV index

The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A daily high UV index of 3 in September leads to these guidelines:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.

[Resources]

Frequently asked questions

What are the temperatures in Tallinn in September?

In Tallinn, 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?

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

How many days does it rain in September in Tallinn?

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?

In Tallinn, snow does not fall in June through September.

Does it snow in Tallinn in September?

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

How cold is the water in September in Tallinn?

In Tallinn, 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?

In Tallinn, Estonia, the average day length in September is 12h and 51min.

When is the sunrise / sunset in September in Tallinn?

In September, on the first day of the month, sunrise is at 06:18 and sunset at 20:22. On the last day of the month, in Tallinn, sunrise is at 07:25 and sunset at 18:56 EEST.

How long on average sun shines in September in Tallinn?

In September, the average sunshine duration in Tallinn is 4.7h.

How high is the UV index in September in Tallinn?

In Tallinn, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

20.4°C 68.7°F

15.2°C 59.4°F

9.4°C 48.9°F

Average low temperature

Average humidity

Average rainfall

Average rainfall days

Average snowfall days

Average sea temperature

Average daylight

Average sunshine

Average UV index

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).

[Resources]

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%).

[Resources]

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).

[Resources]

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).

[Resources]

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).

[Resources]

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).

[Resources]

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

Average daylight in September: 12h and 5min

The month with the longest days is June (Average daylight: 18h and 30min).
The month with the shortest days is December (Average daylight: 6h and 12min).

Average sunshine in September: 4h and 4min

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).

[Resources]

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).

[Resources]

September weather forecast
Tallinn, Estonia

Contents