September weather forecastSillamäe, Estonia

September

Weather in September

September in Sillamäe, Estonia, sees the beginning of the autumn season. The temperatures begin their downward journey as daylight hours decrease steadily. The prolific greenery from the summer season gives way to the autumn aesthetic of warm colors. However, a visible increase in cloud cover from 37% in August to 51% in September signals frequent overcast skies. The diminishing heat, with a drop in the high temperature from 19.7°C (67.5°F) in August to a more pleasant 15.2°C (59.4°F), introduces the charm of the fall season.

Temperature

September in Sillamäe reveals a small adjustment in temperature, transitioning from an average high of an enjoyable 19.7°C (67.5°F) in August to a still refreshing 15.2°C (59.4°F). Throughout September, Sillamäe observes a steady low-temperature average of 11.2°C (52.2°F), reflecting a minor dip from daytime highs.

Humidity

In Sillamäe, the average relative humidity in September is 79%.

Rainfall

In September, in Sillamäe, the rain falls for 17.2 days. Throughout September, 43mm (1.69") of precipitation is accumulated. Throughout the year, there are 151.8 rainfall days, and 510mm (20.08") of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Sea temperature

In September, the average sea temperature is 15.3°C (59.5°F).
Note: Swimming is not a pleasant activity for most individuals in 15.3°C (59.5°F). Breathing becomes increasingly challenging to control as the water temperature dips from 21°C (69.8°F) to 15°C (59°F).

Daylight

The average length of the day in September in Sillamäe is 12h and 51min.
On the first day of the month, sunrise is at 06:06 and sunset at 20:10. On the last day of September, sunrise is at 07:12 and sunset at 18:44 EEST.

Sunshine

The average sunshine in September in Sillamäe, Estonia, is 7.2h.

UV index

The average daily maximum UV index in September in Sillamäe is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: A daily maximum UV index of 3 in September translates into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.

Updated: Jan 29, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Sillamäe in September has an average high-temperature of 15.2°C (59.4°F) and an average low-temperature of 11.2°C (52.2°F).

In Sillamäe, Estonia, the average relative humidity in September is 79%.

In Sillamäe, Estonia, in September, during 17.2 rainfall days, 43mm (1.69") of precipitation is typically accumulated.

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

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

In Sillamäe, Estonia, the average seawater temperature in September is 15.3°C (59.5°F). For swimming, a surface water temperature of 15.3°C (59.5°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).

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

On the first day of September in Sillamäe, Estonia, sunrise is at 06:06 and sunset at 20:10. On the last day of the month, sunrise is at 07:12 and sunset at 18:44 EEST.

The average sunshine duration in September in Sillamäe is 7.2h.

In Sillamäe, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

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

Aug

September

Oct

Average high temperature

19.7°C

15.2°C

8.4°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

15.6km/h

17.9km/h

20.2km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

3.5

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

11.4

9.8

9.1

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Sillamäe, Estonia

Average high temperature in September: 15.2°C

The warmest month (with the highest average high temperature) is July (20.4°C).
The month with the lowest average high temperature is January (-2.8°C).

Average low temperature in September: 11.2°C

The month with the highest average low temperature is July (14.8°C).
The coldest months (with the lowest average low temperature) are January and February (-6°C).

Average pressure in September
Sillamäe, Estonia

Average pressure in September: 1014.1mbar

The month with the highest atmospheric pressure is May (1015.1mbar).
The month with the lowest atmospheric pressure is December (1010mbar).

Average wind speed in September
Sillamäe, Estonia

Average wind speed in September: 17.4km/h

The windiest month (with the highest average wind speed) is December (20.8km/h).
The calmest month (with the lowest average wind speed) is May (13.4km/h).

Average humidity in September
Sillamäe, Estonia

Average humidity in September: 79%

The month with the highest relative humidity is February (92%).
The months with the lowest relative humidity are May and June (73%).

Average rainfall in September
Sillamäe, Estonia

Average rainfall in September: 43mm

The wettest month (with the highest rainfall) is August (65mm).
The driest month (with the least rainfall) is April (29mm).

Average rainfall days in September
Sillamäe, Estonia

Average rainfall days in September: 17.2 days

The month with the highest number of rainy days is August (17.8 days).
The month with the least rainy days is February (4.8 days).

Average snowfall in September
Sillamäe, Estonia

Average snowfall in September: 0mm

The month with the highest snowfall is January (164mm).
The months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in September
Sillamäe, Estonia

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (19.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in September
Sillamäe, Estonia

Average sea temperature in September: 15.3°C

The best month for swimming (with the highest average sea temperature) is July (19.9°C).
The coldest month (with the lowest average sea temperature) is February (-0.6°C).

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

Average daylight in September: 12h and 48min

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: 7h and 12min

The month with the most sunshine is June (Average sunshine: 12h and 18min).
The month with the least sunshine is December (Average sunshine: 1h and 36min).

Average sunshine days in September
Sillamäe, Estonia

Average sunshine days in September: 9.8 days

The month with the most sunshine days is May (16 days).
The month with the least sunshine days is December (4.6 days).

Average UV index in September
Sillamäe, 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, February, March, November and December (UV index 1).