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Weather in Riga for September 2025

Your guide to Riga weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Yellow Thunderstorm Warning - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Riga has been nearly identical to the historical average, with a temperature of 22.1 °C (showing only a slight deviation of -0.1 °C).

  • The forecast for the next days in Riga predicts a temperature of 16.2 °C, which is cooler than the historical average.

  • In general, the average temperature in Riga at the beginning of September is 22.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.1 °C by the end of September.

    • Rain 🌧️

  • The climate of Riga in September is notably wet, with an average of 12 rainy days, and a total of 32.5 mm of precipitation.

Average dry days
18
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/12°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
70 %
Avg humidity

Riga Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Light rain shower
19°
2
Light rain shower
21°
3
Light rain shower
23°
4
Sunny
24°
5
Cloudy
24°
6
Overcast
22°
7
Overcast
23°
8
Sunny
23°
9
Mist
23°
10
Partly cloudy
22°
11
Sunny
23°
12
Sunny
20°
13
Partly cloudy
22°
14
Overcast
21°
15
Partly cloudy
18°
16
Weather Alert Moderate rain
19°
17
Weather Alert Patchy rain possible
18°
18
Patchy rain possible
19°
19
Patchy rain possible
19°
20
Partly cloudy
24°
21
Patchy rain possible
21°
22
Patchy rain possible
17°
23
Patchy rain possible
13°
24
Patchy rain possible
14°
25
Patchy rain possible
14°
26
Patchy rain possible
11°
27
Patchy rain possible
12°
28
Overcast
14°
29
Patchy rain possible
12°
30
Light rain shower
15°

Temperatures trend during September in Riga

See the weather trend as well as the moving average line

September weather in Riga day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
 19° /12° 3.4 mm 4
2 Sept. Light rain shower
Light rain shower
 21° /12° 6.3 mm 5
3 Sept. Light rain shower
Light rain shower
 23° /13° 1.4 mm 5
4 Sept. Sunny
Sunny
 24° /13° 0 mm 6
5 Sept. Cloudy
Cloudy
 24° /14° 0 mm 6
6 Sept. Overcast
Overcast
 22° /13° 0.5 mm 5
7 Sept. Overcast
Overcast
 23° /12° 0.4 mm 6
8 Sept. Sunny
Sunny
 23° /13° 0 mm 6
9 Sept. Mist
Mist
 23° /13° 0 mm 5
10 Sept. Partly cloudy
Partly cloudy
 22° /13° 1.7 mm 5
11 Sept. Sunny
Sunny
 23° /15° 1.1 mm 6
12 Sept. Sunny
Sunny
 20° /13° 5.6 mm 5
13 Sept. Partly cloudy
Partly cloudy
 22° /15° 0.6 mm 5
14 Sept. Overcast
Overcast
 21° /13° 4.3 mm 5
15 Sept. Partly cloudy
Partly cloudy
 18° /12° 0.9 mm 5
16 Sept. Moderate rain
Moderate rain
 19° /13° 6.4 mm 0.7
17 Sept. Patchy rain possible
Patchy rain possible
 18° /11° 1.4 mm 0.7
18 Sept. Patchy rain possible
Patchy rain possible
 19° /10° 0.5 mm 0.7
19 Sept. Patchy rain possible
Patchy rain possible
 19° /15° 0.6 mm 0.7
20 Sept. Partly cloudy
Partly cloudy
 24° /16° 0 mm 0.8
21 Sept. Patchy rain possible
Patchy rain possible
 21° /14° 1.9 mm 4
22 Sept. Patchy rain possible
Patchy rain possible
 17° /12° 4.1 mm 3
23 Sept. Patchy rain possible
Patchy rain possible
 13° /11° 1 mm 3
24 Sept. Patchy rain possible
Patchy rain possible
 14° /12° 0.9 mm 3
25 Sept. Patchy rain possible
Patchy rain possible
 14° /9° 1.4 mm 3
26 Sept. Patchy rain possible
Patchy rain possible
 11° /6° 0.3 mm 2
27 Sept. Patchy rain possible
Patchy rain possible
 12° /8° 2.2 mm 2
28 Sept. Overcast
Overcast
 14° /7° 0.1 mm 3
29 Sept. Patchy rain possible
Patchy rain possible
 12° /9° 0.3 mm 3
30 Sept. Light rain shower
Light rain shower
 15° /9° 1.7 mm 4
Next
Important Notice
Our weather forecast for Riga in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Riga forecast closer to your planned date for the most up-to-date weather information.
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Riga in September - FAQ

What are the expected maximum and minimum temperatures in Riga during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Riga during September?
In September, Riga can expect light to moderate rainfall, totaling 32.5 mm across approximately 12 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Riga during September?
The average wind speed in Riga during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Riga

Explore the daily rainfall trends and prepare for Rigas September weather 💧

UV exposure in Riga during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Get accurate weather forecasts for Riga, located at latitude 56.946 and longitude 24.106. Stay updated with localized weather information tailored for Riga.

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