Weather in Sisak - 14-day forecast

Detailed weather forecast for Sisak, Croatia: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in Sisak

today🌧️ 25°💧 0.7 mm

Thu🌤️ 27°💧 0.6 mm

Fri🌧️ 30°💧 0.9 mm

Sat🌧️ 26°💧 1.4 mm

Sun🌧️ 28°💧 1.2 mm

Mon☁️ 33°💧 2.1 mm

Tue🌧️ 32°💧 3.1 mm

Wed🌧️ 21°💧 0.6 mm

⚠️ Weather warnings - Sisak

✅ No active weather warnings for Sisak (region: Karlovac region). The national weather service is not forecasting dangerous conditions.

14-day forecast - Sisak

📅 Sisak 30 & 45-day weather - long-range outlook

Next 16 days · forecast

30°

around 21° at night · days with rain: 8

Weeks 3-4 · avg for July

29°

around 16° at night · rain chance 39%

Weeks 5-7 · avg for August

28°

around 15° at night · rain chance 37%

The 30 & 45-day outlook for Sisak: the next 16 days are a numerical forecast updated daily - on average 30° by day and 21° at night. Further out we rely on multi-year climate averages: around 29° in July, and about 28° in August. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Sisak

Wednesday8 July 2026

🌧️25°light rain

sunrise 05:14 · sunset 20:45 · night 19° · evening 23° · rain 0.7 mm · humidity 47% · wind 6 m/s · clouds 100%

Thursday9 July 2026

🌤️27°a few clouds

sunrise 05:15 · sunset 20:44 · night 22° · evening 25° · rain 0.6 mm · humidity 42% · wind 2 m/s · clouds 17%

Friday10 July 2026

🌧️30°light rain

sunrise 05:16 · sunset 20:44 · night 19° · evening 31° · rain 0.89 mm · humidity 32% · wind 2 m/s · clouds 3%

Saturday11 July 2026

🌧️26°light rain

sunrise 05:16 · sunset 20:43 · night 22° · evening 31° · rain 1.43 mm · humidity 63% · wind 2 m/s · clouds 98%

Sunday12 July 2026

🌧️28°light rain

sunrise 05:17 · sunset 20:42 · night 21° · evening 32° · rain 1.2 mm · humidity 34% · wind 2 m/s · clouds 93%

Monday13 July 2026

☁️33°broken clouds

sunrise 05:18 · sunset 20:42 · night 22° · evening 26° · rain 2.13 mm · humidity 24% · wind 2 m/s · clouds 77%

Tuesday14 July 2026

🌧️32°light rain

sunrise 05:19 · sunset 20:41 · night 17° · evening 17° · rain 3.12 mm · humidity 30% · wind 9 m/s · clouds 10%

Wednesday15 July 2026

🌧️21°light rain

sunrise 05:20 · sunset 20:40 · night 17° · evening 21° · rain 0.63 mm · humidity 78% · wind 3 m/s · clouds 84%

Thursday16 July 2026

☀️31°clear sky

sunrise 05:21 · sunset 20:40 · night 21° · evening 25° · rain 0.99 mm · humidity 33% · wind 2 m/s · clouds 95%

Friday17 July 2026

🌧️35°light rain

sunrise 05:22 · sunset 20:39 · night 18° · evening 27° · rain 2.85 mm · humidity 27% · wind 5 m/s · clouds 45%

Saturday18 July 2026

🌧️22°moderate rain

sunrise 05:23 · sunset 20:38 · night 19° · evening 23° · rain 10.68 mm · humidity 88% · wind 3 m/s · clouds 99%

Sunday19 July 2026

☀️33°clear sky

sunrise 05:24 · sunset 20:37 · night 21° · evening 26° · rain 0.3 mm · humidity 26% · wind 4 m/s · clouds 2%

Monday20 July 2026

☀️34°clear sky

sunrise 05:25 · sunset 20:36 · night 24° · evening 27° · rain 4.08 mm · humidity 27% · wind 2 m/s · clouds 11%

Tuesday21 July 2026

☀️37°clear sky

sunrise 05:26 · sunset 20:35 · night 24° · evening 27° · rain 0.84 mm · humidity 21% · wind 6 m/s · clouds 1%

Wednesday22 July 2026

☀️32°clear sky

sunrise 05:27 · sunset 20:34 · night 23° · evening 27° · rain 1.32 mm · humidity 32% · wind 5 m/s · clouds 30%

Thursday23 July 2026

☀️30°clear sky

sunrise 05:28 · sunset 20:33 · night 25° · evening 25° · humidity 26% · wind 3 m/s · clouds 2%

☀️ UV index in Sisak - is it safe to sunbathe?

Today the UV index in Sisak is 4 (moderate) - unprotected fair skin can burn in about 50 minutes. Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.

🌿 Pollen in Sisak - info for allergy sufferers

Today grasses pollen is highest in Sisak - about 21 grains/m³, moderate level. Most allergy sufferers should not feel strong symptoms. Pollen levels are a CAMS model forecast and are indicative.

Air quality and smog in Sisak

City	PM2.5 (µg/m³)	PM10 (µg/m³)	Air quality
Zagrzeb	6.6	9.8	very good
Rijeka	5.8	9.3	very good
Split	5	7.7	very good

Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-07-08, 03:00).

Sisak weather through the year

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

🎉 Public holidays in Sisak - when are the long weekends?

Next long weekend in Sisak: Christmas Day (25 December, Friday) - Friday–Sunday (3 days off).

5 AugustWednesday

Victory and Homeland Thanksgiving Day and the Day of Croatian defenders

15 AugustSaturday

Assumption Day

falls on a weekend

1 NovemberSunday

All Saints' Day

falls on a weekend

18 NovemberWednesday

Remembrance Day

25 DecemberFriday

Christmas Day

🎈 long weekend

26 DecemberSaturday

St. Stephen's Day

falls on a weekend

1 JanuaryFriday 2027

New Year's Day

🎈 long weekend

6 JanuaryWednesday 2027

Epiphany

28 MarchSunday 2027

Easter Sunday

falls on a weekend

29 MarchMonday 2027

Easter Monday

🎈 long weekend

1 MaySaturday 2027

International Workers' Day

falls on a weekend

27 MayThursday 2027

Corpus Christi

🎈 long weekend + bridge day

Public holidays (statutory days off) - shops, offices and some attractions may be closed. A "bridge day" is a workday between a holiday and the weekend worth taking as leave.

Nearby places

Velika GoricaZagrebPrijedorSamobor

FAQ - Sisak weather

What is the weather like in Sisak today?

Today it is about 25° during the day and 19° at night, light rain.

How far ahead can I check the forecast for Sisak?

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.