Weather in Semarang — today
Now in Semarang
☁️
+35°
Overcast
Feels like +38° · humidity 38%
Today 12.9: +35° / +25°
🕐 13:25
Wind
15 km/h
UV index
8
Air (AQI)
125 · Very poor
Precipitation
56%
Humidity
38%
Pressure
1010 hPa
Sunrise / sunset
05:33 / 17:35
Sea temperature
🌊 +30°
👕 What to wear today
Hot — light breathable clothing, a hat, plenty of water.
☂️ Take an umbrella🧴 SPF 50💧 Bring waterFeels warmer by 3°
Weather for an activity:
Detailed weather information for Semarang
Today, 12 September, Saturday, in Semarang (Indonesia): partly cloudy, hot. During the day the air will warm up to +35°, at night around +25°. Due to high humidity it feels like +38°. UV is extreme (index 8) — better stay in the shade at midday. Wind up to 17 km/h. High chance of rain — be sure to take an umbrella or a raincoat. Dress as lightly as possible, wear a hat, apply sunscreen and keep water with you. The sea has warmed up to +30° — great for swimming. The sun will rise at 05:33 and set at 17:35 — daylight lasts 12 hours.Hourly weather in Semarang
💧 The bars at the bottom show the hourly precipitation probability. Shaded areas of the chart are the dark hours (before sunrise 🌅 and after sunset 🌇).
Weather in Semarang for 14 days
Tap a day to expand it by time of day and open the full forecast. The bar shows the range from the night low (left) to the day high (right).
▶
Today 12.9
☁️
💧 56%
+25° +35°
Morning
☁️
+29°
Day
☁️
+35°
Evening
🌇
+33°
Night
🌙
+25°
▶
Tomorrow 13.9
☁️
💧 2%
+25° +36°
Morning
☀️
+29°
Day
☁️
+36°
Evening
🌇
+29°
Night
🌙
+25°
▶
Mon 14.9
🌦️
💧 17%
+24° +34°
Morning
🌦️
+28°
Day
🌦️
+34°
Evening
🌇
+32°
Night
🌙
+24°
▶
Tue 15.9
🌦️
💧 22%
+25° +36°
Morning
🌦️
+29°
Day
🌦️
+36°
Evening
🌇
+33°
Night
🌙
+25°
▶
Wed 16.9
☁️
💧 37%
+26° +34°
Morning
☁️
+29°
Day
☁️
+34°
Evening
🌇
+32°
Night
🌙
+26°
▶
Thu 17.9
🌤️
💧 39%
+26° +33°
Morning
🌤️
+29°
Day
🌤️
+33°
Evening
🌇
+31°
Night
🌙
+26°
▶
Fri 18.9
🌦️
💧 45%
+26° +34°
Morning
🌦️
+29°
Day
🌦️
+34°
Evening
🌇
+32°
Night
🌙
+26°
▶
Sat 19.9
🌦️
💧 39%
+26° +32°
Morning
🌦️
+28°
Day
🌦️
+32°
Evening
🌇
+31°
Night
🌙
+26°
▶
Sun 20.9
🌦️
💧 24%
+25° +35°
Morning
🌦️
+29°
Day
🌦️
+35°
Evening
🌇
+33°
Night
🌙
+25°
▶
Mon 21.9
🌦️
💧 14%
+27° +36°
Morning
🌦️
+30°
Day
🌦️
+36°
Evening
🌇
+34°
Night
🌙
+27°
▶
Tue 22.9
⛅
💧 8%
+26° +36°
Morning
⛅
+30°
Day
⛅
+36°
Evening
🌇
+34°
Night
🌙
+26°
▶
Wed 23.9
☁️
💧 10%
+26° +36°
Morning
☁️
+30°
Day
☁️
+36°
Evening
🌇
+34°
Night
🌙
+26°
▶
Thu 24.9
☁️
💧 16%
+27° +37°
Morning
☁️
+31°
Day
☁️
+37°
Evening
🌇
+35°
Night
🌙
+27°
▶
Fri 25.9
🌤️
💧 16%
+27° +35°
Morning
🌤️
+30°
Day
🌤️
+35°
Evening
🌇
+33°
Night
🌙
+27°
🗺️ Precipitation radar
Precipitation radar (RainViewer) over a clean base map — updates every 5–10 minutes. Colours show nearby precipitation; if there is none, the map is simply clear — that is normal. Zoom with + / −.
Rain intensity:lightmoderateheavy
🎯 What to do in this weather — indices of the day
Comfort score from 0 (bad) to 100 (excellent), calculated from the day's weather. For “rain” and “UV” a percentage/risk level is shown.
🏖️ Beach
25 / 100
for sea and sun · So-so
🏊 Swimming
20 / 100
water 30° · So-so
🏃 Running
0 / 100
comfort for running · Bad
🧴 UV
72%
extreme · high
☂️ Rain
56%
likely · moderate
✨ Stars
49 / 100
evening visibility · Average
🧺 Laundry drying
31 / 100
will dry outside · So-so
🚗 Car wash
28 / 100
better to wait · So-so
🌫️ Air quality
125
Very poor air
European AQI
PM2.5: 44PM10: 45O₃: 205NO₂: 6
People with allergies or asthma should reduce time outdoors.
🌅 Sun, moon and sea
Sunrise
05:33
Sunset
17:35
Golden hour
17:07
Daylight
12 h (+0 min vs yesterday)
Sea temperature
+30°
🌊 calm, waves 0.4 m.
Semarang climate by month
Long-term averages. Hover over a bar for details. The forecast for a specific month is a combination of the climate normal and the model forecast for the coming weeks.
+28°
+24°
Jan
+28°
+24°
Feb
+29°
+24°
Mar
+29°
+24°
Apr
+30°
+24°
May
+30°
+23°
Jun
+31°
+23°
Jul
+31°
+23°
Aug
+32°
+24°
Sep
+31°
+24°
Oct
+30°
+24°
Nov
+29°
+24°
Dec
swipe sideways →
Bar color shows temperature:frostcoolcomfortablewarmhot— best months to visit
| Month | Day | Night | Sea | Precipitation | What to pack and what makes the month notable (events, nuances) |
|---|---|---|---|---|---|
| January | +28° | +24° | +30° | 375 mm | Warm and comfortable: +28° by day, +24° at night. It's a rainy month (375 mm) — an umbrella is a must. 😊 light summer clothing. The sea is +30° — like a warm bath. |
| February | +28° | +24° | +30° | 339 mm | Gentle warmth — about +28° daytime, great walking weather. Frequent rain (339 mm over the month) — keep indoor backup plans. 😊 light summer clothing. The sea is +30° — like a warm bath. This is the coldest month of the year. |
| March | +29° | +24° | +30° | 324 mm | A comfortable month: +29° by day without exhausting heat. One of the wettest months (324 mm): downpours can derail plans. 😊 light summer clothing. The sea is +30° — like a warm bath. |
| April | +29° | +24° | +31° | 223 mm | Warm and comfortable: +29° by day, +24° at night. It's a rainy month (223 mm) — an umbrella is a must. 😊 light summer clothing. The sea is +31° — like a warm bath. |
| May | +30° | +24° | +31° | 103 mm | Gentle warmth — about +30° daytime, great walking weather. Frequent rain (103 mm over the month) — keep indoor backup plans. 😊 light summer clothing. The sea is +31° — like a warm bath. |
| June | +30° | +23° | +30° | 58 mm | A comfortable month: +30° by day without exhausting heat. 😊 light summer clothing. The sea is +30° — like a warm bath. The shortest daylight of the year — it gets dark early. |
| July | +31° | +23° | +30° | 38 mm | Warm and comfortable: +31° by day, +23° at night. 😊 light summer clothing. The sea is +30° — like a warm bath. Weather-wise, one of the three best months to visit. |
| August | +31° | +23° | +30° | 24 mm | Gentle warmth — about +31° daytime, great walking weather. 😊 light summer clothing. The sea is +30° — like a warm bath. Weather-wise, one of the three best months to visit. |
| September | +32° | +24° | +30° | 44 mm | A comfortable month: +32° by day without exhausting heat. 😊 light summer clothing. The sea is +30° — like a warm bath. This is the hottest month of the year in Semarang. |
| October | +31° | +24° | +31° | 134 mm | Warm and comfortable: +31° by day, +24° at night. It's a rainy month (134 mm) — an umbrella is a must. 😊 light summer clothing. The sea is +31° — like a warm bath. |
| November | +30° | +24° | +31° | 265 mm | Gentle warmth — about +30° daytime, great walking weather. Frequent rain (265 mm over the month) — keep indoor backup plans. 😊 light summer clothing. The sea is +31° — like a warm bath. The sea is at its warmest of the year this month. |
| December | +29° | +24° | +31° | 397 mm | A comfortable month: +29° by day without exhausting heat. One of the wettest months (397 mm): downpours can derail plans. 😊 light summer clothing. The sea is +31° — like a warm bath. Statistically the wettest month of the year. |
When to visit Semarang
✅ Recommended time to visit
🌟 Best time: June, July, August
Daytime air+30…+31°
Sea temperature+30…+30°
Precipitationoften
Why: comfortable +30…+31° by day, little rain, warm sea (+30…30°).
⚠️ Doable, with caveats
🌤️ Shoulder season: January, February, April, May, September, October
Daytime air+28…+32°
Sea temperature+30…+31°
Precipitationoften
Why: noticeable rain risk (44–375 mm/month) — pack an umbrella and backup plans.
🔴 Not the best time
🌤️ Shoulder season: March, November, December
Daytime air+29…+30°
Sea temperature+30…+31°
Precipitationoften
Why: the rainy season (265–397 mm/month) — downpours almost daily.
Bottom line: the best time to visit Semarang is June – August, and the most comfortable months are June, July, August. The toughest months to visit are March, November, December: frequent rain.
🌡️ Today vs the climate normal
Today's high
+35°
Normal for September
+32°
Deviation
3° warmer than normal
A year ago on this day
+33°
Record for this date
+36° (2023)
The normal, “a year ago” and the record come from the weather archive since 1940 (Open-Meteo / ERA5).
Weather archive for Semarang
📅 See what the weather was like on any day since 1940. For example: “what was the weather on March 2, 2021”.
Show the archive for the selected day →
Show the archive for the selected day →
Weather in cities near Semarang
Frequently asked questions about the weather in Semarang
What is the weather in Semarang right now?＋
Overcast, +35°, feels like +38°.
Will it rain in Semarang today?＋
Yes: 56% chance, 0 mm.
When is the best time to visit Semarang?＋
Best time to visit — June – August.
Can you swim in Semarang in winter?＋
In winter the water is around +30° — like a warm bath. In summer the sea warms up to +30°.
What time are sunrise and sunset in Semarang?＋
Sunrise 05:33, sunset 17:35.
Does it snow in Semarang in winter?＋
No, it practically never snows.
What is the climate in Semarang by month?＋
Summers up to +32° in September, winters around +24° in February; the wettest month is December.
How hot is it in Semarang in summer?＋
😊 Warm and comfortable. Perfect for walks, the beach and sightseeing.