Montenegro Kotor Weather in September — Climate Guide
September in Kotor is very-high
September is very-high for Kotor.
September is many regulars' favorite month in Kotor — warm bay, easing crowds, and lower prices than the summer peak. It averages 26°C/17°C with pleasant, mostly sunny days, though the bay's autumn rain begins to return.
The water holds its summer warmth (~23-24°C), so swimming and boat trips continue, but the August intensity drains away: the alleys breathe, cruise traffic eases, boat tours are easier to book, and prices drop. Early September still feels like summer; by late September there's a gentle autumn edge and more showers.
Travel score
Kotor September Weather Stats
Avg High
26°C
Avg Low
17°C
Rainy Days
8
95mm total
Sunshine
8h
Daily avg
Humidity
65%
comfortable
UV Index
7
High
Wind
9 km/h
Gusts 18
Sea Temp
24°C
Avg water temp
Crowds
Busy
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
14 μg/m³
PM10
24 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
27°C
Nighttime
17°C
Humidity and wind affect how the actual temperature feels.
Wind
9 km/h
Max gust 18 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Warm bay (~23-24°C) with easing crowds
- Lower prices than July-August
- Boat trips and tours still open
- Calmer Old Town and walls climb
Cons
- Autumn rain returning
- Still busy in early September
- Cooler, shorter evenings late in the month
- Showers can interrupt boat trips
September Events & Festivals
- Best shoulder-season month — warm, swimmable, calmer
- Sea still warm (~23-24°C)
- Crowds and cruise traffic easing after August
- Autumn rain starting to return
Kotor in September — Full Picture
September is many regulars' favorite month in Kotor — warm bay, easing crowds, and lower prices than the summer peak. It averages 26°C/17°C with pleasant, mostly sunny days, though the bay's autumn rain begins to return.
The water holds its summer warmth (~23-24°C), so swimming and boat trips continue, but the August intensity drains away: the alleys breathe, cruise traffic eases, boat tours are easier to book, and prices drop. Early September still feels like summer; by late September there's a gentle autumn edge and more showers.
It's an ideal blend of beach-and-bay weather and uncrowded sightseeing — the Old Town and the walls climb are a pleasure without the midday cruise mob.
Rainfall ticks up versus mid-summer, so pack a light layer and a packable rain shell alongside your summer kit. For warm-bay days without the August crush, September is the smart pick.
What to Wear & What to Pack
Warm early autumn — around 26°C/17°C with a still-warm bay. Light summer clothing by day, a light layer for evenings, plus a packable rain shell as autumn rain returns. UV 7 — hat, sunglasses, SPF 30+. The bay stays swimmable (~23-24°C).
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
18.7°C
10.3°C
10.7/mo
Summer (Jun·Jul·Aug)
29°C
19.3°C
6.3/mo
Autumn (Sep·Oct·Nov)
Current21°C
13°C
10.7/mo
Winter (Dec·Jan·Feb)
12.3°C
5.3°C
12/mo
Kotor Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 12° | 5° | 12d·165mm | 4h | 72% | 2 | Quiet | Low season | |
| 12° | 5° | 11d·150mm | 4.5h | 70% | 2 | Quiet | Low season | |
| 15° | 7° | 11d·130mm | 5.5h | 67% | 3 | Quiet | Low season | |
| 18° | 10° | 11d·110mm | 6.5h | 66% | 5 | Moderate | Shoulder | |
| May (Best) | 23° | 14° | 10d·90mm | 8h | 64% | 7 | Busy | Shoulder |
| June (Best) | 27° | 18° | 8d·70mm | 10h | 62% | 9 | Busy | Peak |
| 30° | 20° | 5d·40mm | 12h | 60% | 10 | Very busy | Peak | |
| 30° | 20° | 6d·55mm | 11h | 62% | 10 | Very busy | Peak | |
| September (Best) | 26° | 17° | 8d·95mm | 8h | 65% | 7 | Busy | Shoulder |
| 21° | 13° | 11d·165mm | 5.5h | 69% | 4 | Moderate | Shoulder | |
| 16° | 9° | 13d·235mm | 4h | 73% | 2 | Quiet | Low season | |
| 13° | 6° | 13d·200mm | 3.5h | 73% | 1 | Quiet | Shoulder |
View Other Months
Kotor September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Kotor?
Kotor in September is very-high. Tourist crowds are busy and flight/hotel prices are shoulder.
What's the average temperature in Kotor in September?
Kotor September averages a high of 26°C and a low of 17°C.
Does it rain much in Kotor in September?
Kotor September averages 95mm of rainfall over about 8 rainy days.
What should I wear in Kotor in September?
Warm early autumn — around 26°C/17°C with a still-warm bay. Light summer clothing by day, a light layer for evenings, plus a packable rain shell as autumn rain returns. UV 7 — hat, sunglasses, SPF 30+. The bay stays swimmable (~23-24°C).
What time are sunrise and sunset in Kotor in September?
Kotor September sunrise is 06:30 and sunset is 19:10, with 12h 40min of daylight.
What's the air quality like in Kotor in September?
Kotor September air quality (AQI) averages 37, rated Good. PM2.5 averages 14μg/m³.
What activities are recommended in Kotor in September?
In September, Kotor is great for Swimming — bay still warm, Perast & Our Lady of the Rocks boat, City-walls climb in calmer air.
Is September peak season in Kotor?
Kotor September crowds are busy and prices are shoulder. Advance reservations are strongly recommended.
Best Months to Visit Kotor
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.