September weather forecast
Riga, Latvia

A sunny day in Riga, Latvia, with a view of the river and a clear skyscape
A sunny day in Riga, Latvia, with a view of the river and a clear skyscape

Weather in September

The first month of the autumn, September, is also an enjoyable month in Riga, Latvia, with an average temperature fluctuating between 16.8°C (62.2°F) and 10.8°C (51.4°F).

Temperature

In Riga, Latvia, the average high-temperature in September marginally drops from a pleasant 21.5°C (70.7°F) in August to an enjoyable 16.8°C (62.2°F). In September, in Riga, the average low-temperature is 10.8°C (51.4°F).

Humidity

The average relative humidity in September in Riga is 78%.

Rainfall

In September, the rain falls for 14.7 days. Throughout September, 32mm (1.26") of precipitation is accumulated. In Riga, during the entire year, the rain falls for 142 days and collects up to 382mm (15.04") of precipitation.

Snowfall

In Riga, snow does not fall in May through September.

Sea temperature

In Riga, in September, the average water temperature is 15°C (59°F).
Note: Swimming in 15°C (59°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 September, the average length of the day is 12h and 46min.
On the first day of September in Riga, sunrise is at 06:25 and sunset at 20:21. On the last day of the month, sunrise is at 07:25 and sunset at 19:02 EEST.

Sunshine

In September, the average sunshine in Riga is 7.7h.

UV index

The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.
Note: The average daily UV index of 3 in September transform into the following instructions:
Take precautions - Protection against sun damage is advised. 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.
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FAQ

What is the temperature in September in Riga?

In Riga, Latvia, in September, the average high-temperature is 16.8°C (62.2°F), and the average low-temperature is 10.8°C (51.4°F).

What is the average humidity in September in Riga?

In September, the average relative humidity is 78%.

How much does it rain in Riga in September?

In Riga, in September, it is raining for 14.7 days, with typically 32mm (1.26") of accumulated precipitation.

When it does not snow in Riga?

May through September are months without snowfall in Riga.

Does it snow in Riga in September?

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

What is the sea temperature in September in Riga?

In Riga, in September, the average water temperature is 15°C (59°F). For most, swimming in 15°C (59°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).

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

In Riga, Latvia, the average day length in September is 12h and 46min.

When is the sunrise / sunset in September in Riga?

On the first day of September in Riga, sunrise is at 06:25 and sunset at 20:21. On the last day of the month, sunrise is at 07:25 and sunset at 19:02 EEST.

How many hours of sunshine does Riga have in September?

In Riga, Latvia, the average sunshine duration in September is 7.7h.

What is the UV index reading in September in Riga?

The average daily maximum UV index in September in Riga is 3. A UV Index reading 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 sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in September
Riga, Latvia

Average temperature in September - Riga, Latvia
  • Average high temperature in September: 16.8°C

The warmest month (with the highest average high temperature) is July (22.4°C).
The month with the lowest average high temperature is January (-1.3°C).

  • Average low temperature in September: 10.8°C

The month with the highest average low temperature is July (14.5°C).
The coldest month (with the lowest average low temperature) is January (-4.8°C).

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Average pressure in September
Riga, Latvia

Average pressure in September - Riga, Latvia
  • Average pressure in September: 1015.4mbar

The month with the highest atmospheric pressure is October (1016.1mbar).
The month with the lowest atmospheric pressure is December (1011.4mbar).

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Average wind speed in September
Riga, Latvia

Average wind speed in September - Riga, Latvia
  • Average wind speed in September: 15.5km/h

The windiest month (with the highest average wind speed) is December (18.9km/h).
The calmest month (with the lowest average wind speed) is May (13.1km/h).

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Average humidity in September
Riga, Latvia

Average humidity in September - Riga, Latvia
  • Average humidity in September: 78%

The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is May (72%).

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Average rainfall in September
Riga, Latvia

Average rainfall in September - Riga, Latvia
  • Average rainfall in September: 32mm

The wettest month (with the highest rainfall) is July (47mm).
The driest month (with the least rainfall) is April (19mm).

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Average rainfall days in September
Riga, Latvia

Average rainfall days in September - Riga, Latvia
  • Average rainfall days in September: 14.7 days

The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is February (6 days).

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Average snowfall in September
Riga, Latvia

Average snowfall in September - Riga, Latvia
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (84mm).
The months with the least snowfall are May, June, July, August and September (0mm).

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Average snowfall days in September
Riga, Latvia

Average snowfall days in September - Riga, Latvia
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (13.8 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
Riga, Latvia

Average sea temperature in September - Riga, Latvia
  • Average sea temperature in September: 15°C

The best month for swimming (with the highest average sea temperature) is August (17°C).
The coldest months (with the lowest average sea temperature) are February and March (1°C).

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Average daylight in September /
Average sunshine in September
Riga, Latvia

Average daylight in September / Average sunshine in September - Riga, Latvia
  • Average daylight in September: 12h and 46min

The month with the longest days is June (Average daylight: 17h and 46min).
The month with the shortest days is December (Average daylight: 6h and 52min).

  • Average sunshine in September: 7h and 42min

The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 2h and 0min).

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Average sunshine days in September
Riga, Latvia

Average sunshine days in September - Riga, Latvia
  • Average sunshine days in September: 13 days

The month with the most sunshine days is April (16.8 days).
The month with the least sunshine days is December (10.1 days).

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Average UV index in September
Riga, Latvia

Average UV index in September - Riga, Latvia
  • Average UV index in September: 3

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).

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Average cloud cover in September
Riga, Latvia

Average cloud cover in September - Riga, Latvia
  • Average cloud cover in September: 46

The month with the most cloud cover is December (Cloud cover 79).
The month with the least cloud cover is August (Cloud cover 35).

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Average visibility in September
Riga, Latvia

Average visibility in September - Riga, Latvia
  • Average visibility in September: 10km

The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January and February (8km).

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