Weather in Karaj — today
Now in Karaj
⛅
+20°
Partly cloudy
Feels like +20° · humidity 65%
Today 12.9: +29° / +17°
🕐 08:55
Wind
7 km/h
UV index
3
Air (AQI)
36 · Good
Precipitation
5%
Humidity
65%
Pressure
1019 hPa
Sunrise / sunset
05:46 / 18:17
👕 What to wear today
Warm — a T-shirt and light trousers or shorts.
Weather for an activity:
Detailed weather information for Karaj
Today, 12 September, Saturday, in Karaj (Iran): partly cloudy, warm. During the day the air will warm up to +29°, at night around +17°. Due to the wind it feels like +20°. Wind up to 20 km/h. No precipitation expected, you won't need an umbrella. Light summer clothing will do — a T-shirt and shorts or light trousers. The sun will rise at 05:46 and set at 18:17 — daylight lasts 13 hours.Hourly weather in Karaj
💧 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 Karaj 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
⛅
💧 5%
+17° +29°
Morning
⛅
+20°
Day
⛅
+29°
Evening
🌇
+25°
Night
🌙
+17°
▶
Tomorrow 13.9
⛅
💧 8%
+19° +30°
Morning
⛅
+23°
Day
⛅
+30°
Evening
🌇
+26°
Night
🌙
+19°
▶
Mon 14.9
⛅
💧 5%
+20° +30°
Morning
⛅
+24°
Day
⛅
+30°
Evening
🌇
+28°
Night
🌙
+20°
▶
Tue 15.9
☀️
+18° +31°
Morning
☀️
+23°
Day
☀️
+31°
Evening
🌇
+28°
Night
🌙
+18°
▶
Wed 16.9
☀️
+20° +32°
Morning
☀️
+24°
Day
☀️
+32°
Evening
🌇
+29°
Night
🌙
+20°
▶
Thu 17.9
☀️
+22° +33°
Morning
☀️
+26°
Day
☀️
+33°
Evening
🌇
+30°
Night
🌙
+22°
▶
Fri 18.9
⛅
+22° +33°
Morning
⛅
+26°
Day
⛅
+33°
Evening
🌇
+30°
Night
🌙
+22°
▶
Sat 19.9
⛅
+21° +31°
Morning
⛅
+25°
Day
⛅
+31°
Evening
🌇
+29°
Night
🌙
+21°
▶
Sun 20.9
☀️
+19° +31°
Morning
☀️
+23°
Day
☀️
+31°
Evening
🌇
+28°
Night
🌙
+19°
▶
Mon 21.9
☀️
+20° +32°
Morning
☀️
+24°
Day
☀️
+32°
Evening
🌇
+29°
Night
🌙
+20°
▶
Tue 22.9
☀️
+20° +32°
Morning
☀️
+24°
Day
☀️
+32°
Evening
🌇
+29°
Night
🌙
+20°
▶
Wed 23.9
☀️
+19° +30°
Morning
☀️
+23°
Day
☀️
+30°
Evening
🌇
+27°
Night
🌙
+19°
▶
Thu 24.9
☀️
+21° +31°
Morning
☀️
+25°
Day
☀️
+31°
Evening
🌇
+29°
Night
🌙
+21°
▶
Fri 25.9
☀️
+21° +33°
Morning
☀️
+25°
Day
☀️
+33°
Evening
🌇
+30°
Night
🌙
+21°
🗺️ 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.
🏃 Running
63 / 100
comfort for running · Average
🧴 UV
27%
moderate · low
☂️ Rain
5%
unlikely · low
✨ Stars
85 / 100
evening visibility · Excellent
🧺 Laundry drying
66 / 100
will dry outside · Good
🚗 Car wash
89 / 100
no rain expected · Excellent
🌫️ Air quality
36
Good air
European AQI
PM2.5: 13PM10: 24O₃: 78NO₂: 22
The air is clean — you can walk and exercise outside.
🌅 Sun, moon and sea
Sunrise
05:46
Sunset
18:17
Golden hour
17:43
Daylight
13 h (-2 min vs yesterday)
Karaj 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.
+5°
-6°
Jan
+7°
-4°
Feb
+13°
+1°
Mar
+19°
+6°
Apr
+26°
+12°
May
+32°
+17°
Jun
+35°
+21°
Jul
+34°
+20°
Aug
+29°
+16°
Sep
+22°
+10°
Oct
+13°
+2°
Nov
+8°
-3°
Dec
swipe sideways →
Bar color shows temperature:frostcoolcomfortablewarmhot— best months to visit
| Month | Day | Night | Precipitation | What to pack and what makes the month notable (events, nuances) |
|---|---|---|---|---|
| January | +5° | -6° | 38 mm | A cold month: +5° by day, long walks get uncomfortable. 🧣 a warmer jacket. This is the coldest month of the year. |
| February | +7° | -4° | 41 mm | Cold: +7° by day, down to -4° at night — dress warmly. 🧣 a warmer jacket. |
| March | +13° | +1° | 49 mm | A fresh month — +13° daytime, take a jacket for walks. 🧥 a warm jacket. |
| April | +19° | +6° | 46 mm | The most pleasant season: +19° by day, comfortable all day long. 🙂 a sweater for the evening. |
| May | +26° | +12° | 16 mm | One of the best times to visit: +26° by day, fresh nights. 😊 light summer clothing. Weather-wise, one of the three best months to visit. |
| June | +32° | +17° | 2 mm | Gentle warmth — about +32° daytime, great walking weather. 😊 light summer clothing. The longest daylight hours of the year — more time for everything. |
| July | +35° | +21° | 1 mm | A hot, dry month: +35° daytime, warm pleasant evenings. ☀️ water and sunscreen. This is the hottest month of the year in Karaj. |
| August | +34° | +20° | 2 mm | Hot (+34° by day) but dry — manageable with a sensible schedule. ☀️ water and sunscreen. |
| September | +29° | +16° | 2 mm | Gentle warmth — about +29° daytime, great walking weather. 😊 light summer clothing. Weather-wise, one of the three best months to visit. |
| October | +22° | +10° | 16 mm | The most pleasant season: +22° by day, comfortable all day long. 🙂 a sweater for the evening. |
| November | +13° | +2° | 38 mm | Cool: around +13° by day, you'll need a warm layer. 🧥 a warm jacket. |
| December | +8° | -3° | 39 mm | Winter weather: about +8° daytime, you need a warm coat and hat. 🧣 a warmer jacket. The shortest daylight of the year — it gets dark early. |
When to visit Karaj
✅ Recommended time to visit
🌟 Best time: May, June, September
Daytime air+26…+32°
Precipitationalmost none
Why: comfortable +26…+32° by day, little rain.
⚠️ Doable, with caveats
🌤️ Shoulder season: January, February, April, July, August, October
Daytime air+5…+35°
Precipitationrare
Why: cool (+5…+35°) — not beach season, but great for city sights and museums.
🔴 Not the best time
❄️ Cold season: March, November, December
Daytime air+8…+13°
Precipitationoften
Why: cold and dark (+8…+13° by day, 10 h of daylight) — only if frost and short days don’t put you off.
Bottom line: the best time to visit Karaj is May, June, September, and the most comfortable months are May, June, September. The toughest months to visit are March, November, December: cool and damp.
🌡️ Today vs the climate normal
Today's high
+29°
Normal for September
+29°
Deviation
0° within normal
A year ago on this day
+30°
Record for this date
+35° (2018)
The normal, “a year ago” and the record come from the weather archive since 1940 (Open-Meteo / ERA5).
Weather archive for Karaj
📅 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 →
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Weather in cities near Karaj
Frequently asked questions about the weather in Karaj
What is the weather in Karaj right now?＋
Partly cloudy, +20°, feels like +20°.
Will it rain in Karaj today?＋
No: 5% chance, 0 mm.
When is the best time to visit Karaj?＋
Best time to visit — May, June, September.
What time are sunrise and sunset in Karaj?＋
Sunrise 05:46, sunset 18:17.
Does it snow in Karaj in winter?＋
Yes, snow is possible in January, February, December.
What is the climate in Karaj by month?＋
Summers up to +35° in July, winters around -6° in January; the wettest month is March.
How hot is it in Karaj in summer?＋
☀️ Very hot. Drink more water, avoid the midday sun, sunscreen is needed.