Riga weather in September
Temperature, rain and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: May – August
What is the weather like in Riga in September?
In September, Riga is mild: daytime highs average 17 °C, and nights cool down to about 11 °C. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 64 mm in total. All in all, September is a good month for a holiday in Riga.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 77 | 68 | 19 |
| Day | 22° | 17° | 10° |
| Night | 15° | 11° | 6° |
| Sun | 8 h | 6 h | 3 h |
| Rain days | 13 | 11 | 15 |
More details for September
- Daylight
- 12 h 54 min06:52 – 19:46
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 21 km/haverage daily peakAll months
- Cloud cover
- 63 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC+3Europe/Riga
How the score comes together
- Temperatureweight 50 %88 %
- Sunshineweight 20 %43 %
- Few rainy daysweight 30 %50 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- A jumper for the evenings
- Rain jacket or umbrella
Riga in September: quick answers
Is Riga hot in September?
No. In September, Riga is mild: daytime highs average 17 °C and nights drop to about 11 °C.
Does it rain much in Riga in September?
Rain is frequent, with about 11 rainy days and 64 mm in total.
Riga month by month
The whole year in RigaAll destinations: LatviaWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences