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Weather in Viljandi - 14-day forecast

Detailed weather forecast for Viljandi, Estonia: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Viljandi
today🌧️ 14°💧 1.9 mm
Sun🌧️ 14°💧 0.1 mm
Mon🌤️ 16°💧 2.4 mm
Tue☁️ 17°💧 0.1 mm
Wed🌧️ 15°💧 3.8 mm
Thu🌧️ 16°💧 2.9 mm
Fri🌧️ 16°💧 0.3 mm
Sat🌧️ 12°💧 3.6 mm
Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Saturday 5 Sept in Viljandi, the forecast high is 14°C. Typical daytime temperatures at this time of year range from 16°C to 21°C, so it will be exceptionally cool. It is cooler than 91% of similar days.

14°Cexceptionally cool
usually 16°C–21°C
cooler than 91% of similar days
night: near normal rain: more rain than usual wind: exceptionally light
14°Ccooler than usual
usually 15°C–21°C
cooler than 88% of similar days
night: near normal rain: typical rainfall wind: typical
16°Ccooler than usual
usually 15°C–21°C
cooler than 77% of similar days
night: near normal rain: more rain than usual wind: lighter than usual
17°Cnear normal
usually 15°C–20°C
night: exceptionally warm rain: less rain than usual wind: lighter than usual
15°Ccooler than usual
usually 15°C–20°C
cooler than 74% of similar days
night: exceptionally warm rain: more rain than usual wind: lighter than usual
16°Ccooler than usual
usually 15°C–20°C
cooler than 72% of similar days
night: exceptionally warm rain: more rain than usual wind: typical
16°Cnear normal
usually 14°C–20°C
night: warmer than usual rain: typical rainfall wind: typical

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →
10°20°30° 1981: 17°C1982: 15°C1983: 17°C1984: 15°C1985: 13°C1986: 13°C1987: 15°C1988: 18°C1989: 18°C1990: 15°C1991: 12°C1992: 18°C1993: 13°C1994: 17°C1995: 18°C1996: 13°C1997: 18°C1998: 17°C1999: 23°C2000: 16°C2001: 17°C2002: 23°C2003: 18°C2004: 16°C2005: 20°C2006: 18°C2007: 17°C2008: 16°C2009: 19°C2010: 17°C2011: 18°C2012: 17°C2013: 21°C2014: 21°C2015: 18°C2016: 21°C2017: 17°C2018: 23°C2019: 22°C2020: 17°C2021: 19°C2022: 16°C2023: 21°C2024: 24°C2025: 24°C 2026 forecast: 16°C current forecast 16°C 198119902000201020202026
cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 18°C by day. The coolest year was 1991 (12°C) and the warmest was 2024 (24°C). The current forecast averages 16°C - lower than in 80% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

Weather warnings - Viljandi

No active weather warnings for Viljandi (region: Viljandimaa). The national weather service is not forecasting dangerous conditions.

14-day forecast - Viljandi

Viljandi - 14-day weather forecast infographic

Viljandi 30 & 45-day weather - long-range outlook

Next 16 days · forecast
15°
around 12° at night · days with rain: 6
Weeks 3-4 · avg for September
17°
around 10° at night · rain chance 21%
Weeks 5-7 · avg for October
9°
around 4° at night · rain chance 23%
The 30 & 45-day outlook for Viljandi: the next 16 days are a numerical forecast updated daily - on average 15° by day and 12° at night. Further out we rely on multi-year climate averages: around 17° in September, and about 9° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Viljandi

Saturday5 September 2026
🌧️14°light rain
sunrise 06:24 · sunset 20:07 · night 9° · evening 13° · rain 1.86 mm · humidity 84% · wind 3 m/s · clouds 100%
Sunday6 September 2026
🌧️14°light rain
sunrise 06:26 · sunset 20:04 · night 10° · evening 13° · rain 0.13 mm · humidity 60% · wind 6 m/s · clouds 76%
Monday7 September 2026
🌤️16°a few clouds
sunrise 06:29 · sunset 20:02 · night 9° · evening 14° · rain 2.43 mm · humidity 51% · wind 4 m/s · clouds 16%
Tuesday8 September 2026
☁️17°overcast clouds
sunrise 06:31 · sunset 19:59 · night 15° · evening 19° · rain 0.1 mm · humidity 69% · wind 4 m/s · clouds 100%
Wednesday9 September 2026
🌧️15°light rain
sunrise 06:33 · sunset 19:56 · night 13° · evening 17° · rain 3.8 mm · humidity 93% · wind 4 m/s · clouds 100%
Thursday10 September 2026
🌧️16°light rain
sunrise 06:35 · sunset 19:53 · night 14° · evening 16° · rain 2.94 mm · humidity 86% · wind 7 m/s · clouds 100%
Friday11 September 2026
🌧️16°light rain
sunrise 06:37 · sunset 19:50 · night 12° · evening 17° · rain 0.27 mm · humidity 66% · wind 6 m/s · clouds 100%
Saturday12 September 2026
🌧️12°light rain
sunrise 06:40 · sunset 19:47 · night 12° · evening 14° · rain 3.57 mm · humidity 95% · wind 4 m/s · clouds 100%
Sunday13 September 2026
🌧️13°light rain
sunrise 06:42 · sunset 19:44 · night 12° · evening 14° · rain 8.4 mm · humidity 94% · wind 3 m/s · clouds 100%
Monday14 September 2026
🌧️11°light rain
sunrise 06:44 · sunset 19:42 · night 9° · evening 11° · rain 0.24 mm · humidity 73% · wind 6 m/s · clouds 69%
Tuesday15 September 2026
🌧️12°light rain
sunrise 06:46 · sunset 19:39 · night 11° · evening 14° · rain 0.39 mm · humidity 69% · wind 4 m/s · clouds 46%
Wednesday16 September 2026
🌧️16°light rain
sunrise 06:48 · sunset 19:36 · night 11° · evening 16° · rain 0.39 mm · humidity 75% · wind 6 m/s · clouds 100%
Thursday17 September 2026
🌧️14°light rain
sunrise 06:50 · sunset 19:33 · night 11° · evening 14° · rain 0.18 mm · humidity 85% · wind 2 m/s · clouds 100%
Friday18 September 2026
🌧️15°light rain
sunrise 06:53 · sunset 19:30 · night 12° · evening 17° · rain 0.39 mm · humidity 90% · wind 3 m/s · clouds 89%
Saturday19 September 2026
🌤️19°a few clouds
sunrise 06:55 · sunset 19:27 · night 13° · evening 18° · humidity 66% · wind 3 m/s · clouds 13%
Sunday20 September 2026
☁️20°overcast clouds
sunrise 06:57 · sunset 19:24 · night 14° · evening 19° · humidity 66% · wind 3 m/s · clouds 91%

UV index in Viljandi - is it safe to sunbathe?

UV INDEX · 16-DAY FORECASTViljandi03681111+3.3UV MODERATEtoday, daily maxSeek shade around midday. SPF 30+, sunglasses and ahat for longer stays.Unprotected fair skin may burn in about 60 min3Sat5.094Sun6.094Mon7.093Tue8.092Wed9.094Thu10.093Fri11.092Sat12.092Sun13.093Mon14.093Tue15.091Wed16.093Thu17.093Fri18.093Sat19.093Sun20.090-2 low3-5 moderate6-7 high8-10 very high11+ extremeworld-prices.com · 2026-09-05
Today the UV index in Viljandi is 3 (moderate) - unprotected fair skin can burn in about 60 minutes. Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.

Pollen in Viljandi - info for allergy sufferers

PLANT POLLEN · 4-DAY FORECASTViljandiHighest pollen today: Ragweed2 grains/m³ · low leveltoday5.09tomorrow6.09Mon7.09Tue8.09Grasses112-Ragweed212-nonelowmoderatehighvery highoff season: alder, birch, mugwort, olive · values in grains/m³ (daily peak)pogodapodroze.pl · 2026-09-05
Today ragweed pollen is highest in Viljandi - about 2 grains/m³, low level. Most allergy sufferers should not feel strong symptoms. Pollen levels are a CAMS model forecast and are indicative.

Viljandi weather through the year

Viljandi - annual climate

Warmest, driest months on average: April, May, June, July.

Upcoming public holidays in Estonia: Christmas Eve — 24 December · Christmas Day — 25 December · St. Stephen's Day — 26 December.

Nearby and related places

ParnuTartuRakvereTallinnKohtla-JärveNarva

FAQ - Viljandi weather

What is the weather like in Viljandi today?
Today it is about 14° during the day and 9° at night, light rain.
How far ahead can I check the forecast for Viljandi?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.