Latvia
Riga in September: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Riga in September is climatically well suited to city breaks. The average daily high is around 16 °C, and the sea is about 16 °C. With about 12 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
47/100 · #4
Warmth
#4
Dryness
#4
Sun
#6
Sea warmth
#3
Published best categories: none
Riga · SeptemberPhoto: Jorge Láscar from Melbourne, Australia · CC BY 2.0Climate facts
- Average high
- 16 °C
- Average low
- 9 °C
- Sea
- 16 °C
- Rainy days (est.)
- 12 rainy days (est.)
- Sun (est.)
- 4 h/day
- Humidity
- 84 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| August | 21 | 13 | 15 | 81 | 5.4 | 82 | 2.9 | 19 | 61 |
| September (selected) | 16 | 9 | 12 | 59 | 3.5 | 84 | 3.3 | 16 | 47 |
| October | 10 | 4 | 15 | 78 | 1.6 | 89 | 3.8 | 11 | 21 |
How do the previous and next months compare?
Baseline: September (47/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| August | +14 | +4.4 °C | +4 °C | +3.1 | +22 mm | +1.9 h | -2.3 % | -0.4 m/s | +2.9 °C |
| October | -26 | -6.8 °C | -5 °C | +3.4 | +19 mm | -1.9 h | +5 % | +0.5 m/s | -4.3 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Riga in September?
The average daily high is around 16 °C, with an average daily low of about 9 °C.
Can you swim in Riga in September?
The sea is about 16 °C (cold).
Does it rain a lot in Riga in September?
The curated estimate is about 12 rainy days per month, not a directly measured long-term average. Total precipitation averages around 59 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Riga?
By the climate score, July and August are the strongest months for Riga. September is not among them.