SeasonMapPärnu weather in September
Estonia
September in Pärnu: nice, a little rain, with clean air — a great time to visit.
#5 of 12 months in Pärnu · #905 of 1383 destinations to visit in September · comfort 72/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Pärnu in September
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Pärnu climate normals — September
| Daytime high | 17°C / 63°F | 😎 nice |
|---|---|---|
| Nighttime low | 10°C / 50°F | |
| Feels like (high) | 16°C / 61°F | |
| Sea temperature | 18°C / 64°F | 🧊 bracing |
| Rainfall | 63 mm / 2.5 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 10°C / 50°F | |
| Sunshine | 8.2 h/day | |
| Daylight | 12.8 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Pärnu in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 3 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Pärnu's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherPärnu's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
Nearby, and something's on
Within 300 km of Pärnu — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Pärnu?
Pärnu in September — FAQ
- Is September a good time to visit Pärnu?
- September in Pärnu: nice, a little rain, with clean air — a great time to visit. It ranks #5 of 12 months for Pärnu on SeasonMap's comfort score (72/100).
- What is the weather like in Pärnu in September?
- In September, Pärnu averages a daily high of 17.3°C and a low of 10°C, with about 62.5 mm of rain over roughly 9.7 rainy days.
- What is the air quality in Pärnu in September?
- Pärnu has a mean US Air Quality Index of about 35 in September.
Other months in Pärnu
Compare Pärnu in September
Warmer or cooler than Pärnu in September
Similar destinations in Northern Europe — September
Within 300 km: Helsinki's Berry and crayfish season around 20 Jul – 10 Sep.