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Cluj-Napoca in September: Weather, Average temperature and Climate

Planning a trip and want to know what the weather in Cluj-Napoca in September will be like? Take a look at our weather guide for Cluj-Napoca, based on historical data.
Check flight prices to Cluj-Napoca on Avionero:
September

Weather in Cluj-Napoca in September 2025

OK Weather
Mild
🌧️
Rainy
If you plan to visit Cluj-Napoca in September, the weather is typically alright, with an average high temperature of +21°C during the day and approximately 9 sunny days. Expect some rainy, though, as there are typically 13 rainy days in the month and around 61 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flights in one click on Avionero.

Average weather

☀️
+21°C
Avg. max. temperature
-1°C
Min.
+34°C
Max.
61 mm
Total precipitation
76%
Avg. humidity
1 m/s
Avg. wind
9 ☀️
Sunny Days
6 ⛅️
Cloudy
13 🌦
Rainy
Our opinion: Cluj-Napoca has OK weather in September.

Average temperature in Cluj-Napoca in September

Here are the expected maximum, average and minimum temperatures in Cluj-Napoca for September based on the historical data.
Last Year
Historical Data

Going from a maximum of +30°C during the day to a minimum of +8°C during the night, the temperature in September averages around +25°C.

The average maximum temperature goes up 5% by the end of the month, compared with the beginning of the month, from +24°C to +25°C.

Is Cluj-Napoca warm or cold in September?

Cluj-Napoca is typically mild in September.

Maximum temperatures go down compared to the previous month from +26°C to +21°C. The minimum temperature also goes down from +14°C to +9°C.

Pack a light jacket as it will be warm in the day and cool in the evenings.

Take a look at how September is compared to other months in Cluj-Napoca:

Climate in Cluj-Napoca in September

Cluj-Napoca weather looks like this, on average, in September and the surrounding months.
AugustSeptemberOctober
Avg. temperature
+26°C+21°C+15°C
Min. temperature
+4°C-1°C-8°C
Max. temperature
+38°C+34°C+31°C
Rainfall
81 mm61 mm44 mm
Wind
1 m/s1 m/s1 m/s
Humidity
73%76%80%
Air pressure
1015 HPa1016 HPa1018 HPa
Sunny days
1099
Cloudy days
369
Rainy days
121312
Snowy days
000

September typically has worse weather conditions compared to August. It’s getting colder in September. From +26°C in the day, the average maximum temperature lowers to +21°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 81 mm to 61 mm. Humidity rises from 73% to 76%. The average wind speed doesn’t change much during September, staying around 1 m/s. The days becoming less sunny, going from 10 sunny days in August to 9 in September.

October brings much the same weather, it remains ok.

Wind

Wind speed in Cluj-Napoca in September based on historical data.
Last Year
Historical Data

The average wind speed is 1 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.

The average wind speed in Cluj-Napoca is gradually decreasing during September, going from 2 m/s to 1 m/s over the course of the month.

Rain

Amount of rainfall in mm during September in Cluj-Napoca based on historical data.
Last Year
Historical Data
Typically, there is a 33% chance of rain on an average day in September, with total rainfall of approximately 44 mm. The maximum amount of rainfall per day is around 13 mm, which is considered light rain. September is a pretty wet month with over 10 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Cluj-Napoca wettest month is June, where a typical day has a 50% chance of precipitation and 104 mm of rainfall per day. January, on the other hand, is the driest month with a mere 10% chance of precipitation and 10 mm of rainfall per day.

How was the weather last September in Cluj-Napoca?

This is the weather in Cluj-Napoca in September 2023:
1 September
☀️
+24°C
2 September
☀️
+27°C
3 September
☀️
+23°C
4 September
🌧️
+22°C
5 September
☀️
+24°C
6 September
☀️
+24°C
7 September
☀️
+25°C
8 September
☀️
+26°C
9 September
☀️
+27°C
10 September
☀️
+27°C
11 September
☀️
+28°C
12 September
☀️
+29°C
13 September
☀️
+29°C
14 September
☀️
+26°C
15 September
🌧️
+23°C
16 September
☀️
+24°C
17 September
🌧️
+24°C
18 September
☀️
+26°C
19 September
☀️
+21°C
20 September
☀️
+24°C
21 September
☀️
+25°C
22 September
☀️
+26°C
23 September
☀️
+30°C
24 September
☁️
+25°C
25 September
☀️
+27°C
26 September
☀️
+26°C
27 September
☀️
+26°C
28 September
☀️
+25°C
29 September
☀️
+26°C
30 September
☀️
+25°C
In September 2023 Cluj-Napoca had 26 sunny days, 1 cloudy days, and 3 rainy days. The average maximum temperature was +25°C, with an absolute maximum of +30°C and a minimum of +21°C. The average humidity was 76%, with a maximum of 100% and a minimum of 38%. The average wind speed was 1 m/s, with a maximum of 7 m/s and a minimum of 0 m/s.
Are you planning a trip in September?

Climate Change over Years

This is how Cluj-Napoca climate have been changing during last 43 years period.

The climate in Cluj-Napoca in September has not changed much over the last 43 years.

The average temperature was the lowest in 1980 (+12°C) and the highest in 2019 (+17°C). The driest year was 2000 with only 376 mm of rainfall, and the wettest year was 2016 with 881 mm.

FAQ

Frequently asked questions about the weather in Cluj-Napoca in September:

Is September a good time to visit Cluj-Napoca?

It’s always a good time to visit Cluj-Napoca, but the weather is changeable in September, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.

Can you sunbathe in Cluj-Napoca in September?

September has mild temperatures in Cluj-Napoca. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!

Is Cluj-Napoca rainy in September?

Cluj-Napoca is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Cluj-Napoca in September?

Usually, it’s not very sunny in Cluj-Napoca in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

Other cities in Romania

Check out the weather for other cities in Romania.

Monthly weather in Cluj-Napoca

Source of the data

For this page, we’ve looked at the typical weather in Cluj-Napoca, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.