September weather forecast
Iisaku, Estonia

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Weather in September

September denotes the beginning of the transition from summer to autumn in Iisaku. Despite lower temperatures compared to August, September remains quite warm. As September crosses into October, weather conditions shift towards more autumnal characteristics.

Temperature

Iisaku in September experiences a gentle temperature dip, with average high-temperatures reducing from a comfortable 19.7°C (67.5°F) in August to a mild 15.2°C (59.4°F). Iisaku records a slight downturn in temperature to an average of 11.2°C (52.2°F) during September nights.

Humidity

In September, the average relative humidity is 79%.

Rainfall

In Iisaku, Estonia, in September, during 17.2 rainfall days, 43mm (1.69") of precipitation is typically accumulated. Throughout the year, in Iisaku, Estonia, there are 151.8 rainfall days, and 510mm (20.08") of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Iisaku.

Daylight

In September, the average length of the day in Iisaku is 12h and 50min.
On the first day of the month, sunrise is at 06:09 and sunset at 20:11. On the last day of September, in Iisaku, sunrise is at 07:14 and sunset at 18:46 EEST.

Sunshine

The average sunshine in September is 7.2h.

UV index

In Iisaku, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 3 during September translates into the following directions:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
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Frequently asked questions

What are the temperatures in Iisaku in September?

The average high-temperature, in September, in Iisaku, is 15.2°C (59.4°F), while the average low-temperature is 11.2°C (52.2°F).

What is the average humidity in September in Iisaku?

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

How much does it rain in Iisaku in September?

In September, the rain falls for 17.2 days. Throughout September, 43mm (1.69") of precipitation is accumulated.

When it does not snow in Iisaku?

June through September are months without snowfall.

Does it snow in Iisaku in September?

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

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

In September, the average day length in Iisaku, Estonia, is 12h and 50min.

When is the sunrise / sunset in September in Iisaku?

On the first day of September in Iisaku, sunrise is at 06:09 and sunset at 20:11. On the last day of the month, sunrise is at 07:14 and sunset at 18:46 EEST.

How many hours of sunshine does Iisaku have in September?

In Iisaku, Estonia, the average sunshine duration in September is 7.2h.

What is the UV index intensity in September in Iisaku?

In Iisaku, Estonia, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium health risk 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
Iisaku, Estonia

Average temperature in September - Iisaku, 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).

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Average pressure in September
Iisaku, Estonia

Average pressure in September - Iisaku, 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).

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Average wind speed in September
Iisaku, Estonia

Average wind speed in September - Iisaku, 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).

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Average humidity in September
Iisaku, Estonia

Average humidity in September - Iisaku, 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%).

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Average rainfall in September
Iisaku, Estonia

Average rainfall in September - Iisaku, 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).

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Average rainfall days in September
Iisaku, Estonia

Average rainfall days in September - Iisaku, 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).

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Average snowfall in September
Iisaku, Estonia

Average snowfall in September - Iisaku, 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).

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Average snowfall days in September
Iisaku, Estonia

Average snowfall days in September - Iisaku, 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).

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

Average daylight in September / Average sunshine in September - Iisaku, Estonia
  • Average daylight in September: 12h and 5min

The month with the longest days is June (Average daylight: 18h and 24min).
The month with the shortest days is December (Average daylight: 6h and 18min).

  • Average sunshine in September: 7h and 1min

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).

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Average sunshine days in September
Iisaku, Estonia

Average sunshine days in September - Iisaku, 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).

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Average UV index in September
Iisaku, Estonia

Average UV index in September - Iisaku, 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).

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Average cloud cover in September
Iisaku, Estonia

Average cloud cover in September - Iisaku, Estonia
  • Average cloud cover in September: 51

The month with the most cloud cover is December (Cloud cover 81).
The months with the least cloud cover are July and August (Cloud cover 37).

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Average visibility in September
Iisaku, Estonia

Average visibility in September - Iisaku, Estonia
  • Average visibility in September: 10km

The months with the highest visibility are June, July, August and September (10km).
The month with the lowest visibility is February (7km).

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Iisaku, Estonia

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