Climate averages 1991–2020
Tartu weather
in September.
A mild, moderately wet month: the 5th warmest and the joint 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Tartu: daytime highs average 15.4°C and nights cool to about 9.3°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 50 mm of rain on roughly 10 days, which makes September a moderately wet month (the joint 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 54 min on an average September day.
The nearest other city in this atlas is Pskov (113 km away). In September its highs average 15.5°C, about as warm as Tartu, with 59 mm of rain.
Among the 2 cities listed in Estonia, Tartu ranks 1st of 2 for the warmest September highs and 1st of 2 for the driest September (rainfall, lowest first). The mean September high of those 2 cities is 15.3°C; Tartu is level with that mean.
From September to October, average highs fall by 6.8°C to 8.6°C, and monthly rainfall rises from 50 mm to 58 mm.
The annual picture
September in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Tartu climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -2.2°C-6.3°C | -6.3°C | 40 | 10.4 | 7.27 h |
| February | -2.3°C-7.2°C | -7.2°C | 36 | 8.9 | 9.39 h |
| March | 2.3°C-4.1°C | -4.1°C | 35 | 9.0 | 11.812 h |
| April | 9.7°C1.3°C | 1.3°C | 39 | 9.6 | 14.414 h |
| May | 15.6°C6.9°C | 6.9°C | 53 | 10.6 | 16.717 h |
| June | 19.4°C11.6°C | 11.6°C | 84 | 13.1 | 18.218 h |
| July | 21.9°C14.4°C | 14.4°C | 68 | 12.3 | 17.518 h |
| August | 20.6°C13.5°C | 13.5°C | 75 | 12.8 | 15.415 h |
| September, selected | 15.4°C9.3°C | 9.3°C | 50 | 10.3 | 12.913 h |
| October | 8.6°C4.0°C | 4.0°C | 58 | 11.2 | 10.310 h |
| November | 2.9°C-0.4°C | -0.4°C | 50 | 10.7 | 7.98 h |
| December | -0.4°C-3.9°C | -3.9°C | 44 | 10.8 | 6.57 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Pskov in SeptemberRussia · 113 kmHigh 15.5°C · Low 9.5°C · 59 mm rain
- Tallinn in SeptemberEstonia · 163 kmHigh 15.3°C · Low 9.9°C · 60 mm rain
- Riga in SeptemberLatvia · 223 kmHigh 16.6°C · Low 10.5°C · 70 mm rain
- Helsinki in SeptemberFinland · 223 kmHigh 14.6°C · Low 9.8°C · 57 mm rain
- Vantaa in SeptemberFinland · 233 kmHigh 14.9°C · Low 9.0°C · 57 mm rain
- Espoo in SeptemberFinland · 235 kmHigh 14.5°C · Low 10.0°C · 55 mm rain
- Gatchina in SeptemberRussia · 236 kmHigh 14.5°C · Low 8.2°C · 52 mm rain
- Peterhof in SeptemberRussia · 246 kmHigh 13.9°C · Low 9.4°C · 63 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Tartu) is explained once on the Tartu year overview and on the Sources, method and limits page.