Split, Croatia — Weather in September 2026

Monthly climate averages for Split, Croatia. Based on 10-year ERA5 reanalysis data.

Csa Hot-Summer Mediterranean
9.1 /10
Excellent

September is an excellent month in Split

Climate Overview

Split, Croatia in September has warm conditions, with highs averaging 25.3°C (78°F). Sea temperature reaches 24.5°C (76°F).

This month falls at the beginning of Autumn.

Daily highs in September gradually drop from around 27°C (81°F) at the start to 23°C (73°F) by month's end.

Rainfall is heaviest during the last third of the month, while the first third tends to be drier.

Expect around 11.1h of sunshine at the start of September, decreasing to 9.9h by the end.

The warmest days tend to fall around the 1th, averaging 27.3°C (81°F).

Compared to August, this month is about 5°C cooler with 4 more rainy days. Temperatures begin dropping heading into October.

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Monthly September Averages

Temperature
25°C / 18°C
Feels Like
26°C / 18°C
Rain
8 days · 103 mm
Sunshine
10.4h / day
Humidity
70% — Humid
Wind
18 km/h
Wind Direction
NE (40°)
Gusts
29 km/h
Daylight
12.5 h
Cloud Cover
39%
Clear Sky Days
11
UV Index
5.4 — High
Sea Temperature
25°C
Dew Point
16°C — Comfortable
Moon Phase
Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

32°C 28°C 24°C 20°C 16°C 12°C 8°C 151015202530
HighLow

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 8 mm 10 mm 151015202530
Rainfall

Daily Sunshine

0h 3h 6h 9h 12h 151015202530
Sunshine

Daily Wind Speed

0 5 10 15 20 25 151015202530
Wind Speed
Sun Position
Sunrise 06:35
Daylight 12.5h
Sunset 19:07

What to Expect

Daytime temperatures around 25°C (78°F) are ideal for full-day outdoor exploration.

Rain usually comes in shorter passing showers rather than all-day rain.

1 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

January
Poor
Temp
11°C / 4°C
Feels Like
7°C / 0°C
Rain
12days (123 mm) Wet
Sun
6.5h Fair
Humidity
74% Muggy
UV
2 Low
Snow Days
2days
View Details
February
Fair
Temp
13°C / 6°C
Feels Like
10°C / 2°C
Rain
10days (107 mm) Wet
Sun
7.5h Good
Humidity
75% Muggy
UV
2.8 Moderate
Snow Days
1days
View Details
March
Fair
Temp
15°C / 7°C
Feels Like
12°C / 4°C
Rain
10days (108 mm) Wet
Sun
9.3h Good
Humidity
72% Muggy
UV
4.2 Moderate
Snow Days
1days
View Details
April
Good
Temp
18°C / 10°C
Feels Like
17°C / 7°C
Rain
10days (78 mm) Wet
Sun
11.1h Excellent
Humidity
70% Muggy
UV
6 High
View Details
May
Good
Temp
22°C / 14°C
Feels Like
22°C / 13°C
Rain
12days (85 mm) Wet
Sun
12.1h Excellent
Humidity
72% Muggy
UV
6.9 High
View Details
June best
Excellent
Temp
27°C / 19°C
Feels Like
30°C / 20°C
Rain
6days (34 mm) Good
Sun
13.3h Excellent
Humidity
68% Muggy
UV
7.5 Very High
View Details
July best
Excellent
Temp
30°C / 21°C
Feels Like
33°C / 22°C
Rain
4days (22 mm) Good
Sun
13.6h Excellent
Humidity
60% Moderate
UV
7.4 Very High
View Details
August best
Excellent
Temp
30°C / 22°C
Feels Like
33°C / 23°C
Rain
4days (43 mm) Good
Sun
12.4h Excellent
Humidity
62% Muggy
UV
6.8 High
View Details
September best
Excellent
Temp
25°C / 18°C
Feels Like
26°C / 18°C
Rain
8days (103 mm) Wet
Sun
10.4h Excellent
Humidity
70% Muggy
UV
5.4 High
View Details
October
Good
Temp
21°C / 14°C
Feels Like
20°C / 12°C
Rain
9days (105 mm) Wet
Sun
8.8h Good
Humidity
75% Muggy
UV
3.8 Moderate
View Details
November
Wet
Temp
16°C / 10°C
Feels Like
14°C / 7°C
Rain
14days (241 mm) Wet
Sun
6.5h Fair
Humidity
78% Humid
UV
2.3 Moderate
View Details
December
Poor
Temp
12°C / 6°C
Feels Like
10°C / 3°C
Rain
13days (161 mm) Wet
Sun
5.8h Fair
Humidity
77% Humid
UV
1.8 Low
Snow Days
1days
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
January 11°C / 4°C 7°C / 0°C 12days (123 mm) Wet 6.5h Fair 74% Muggy 2 Low Poor View Details
February 13°C / 6°C 10°C / 2°C 10days (107 mm) Wet 7.5h Good 75% Muggy 2.8 Moderate Fair View Details
March 15°C / 7°C 12°C / 4°C 10days (108 mm) Wet 9.3h Good 72% Muggy 4.2 Moderate Fair View Details
April 18°C / 10°C 17°C / 7°C 10days (78 mm) Wet 11.1h Excellent 70% Muggy 6 High Good View Details
May 22°C / 14°C 22°C / 13°C 12days (85 mm) Wet 12.1h Excellent 72% Muggy 6.9 High Good View Details
June best 27°C / 19°C 30°C / 20°C 6days (34 mm) Good 13.3h Excellent 68% Muggy 7.5 Very High Excellent View Details
July best 30°C / 21°C 33°C / 22°C 4days (22 mm) Good 13.6h Excellent 60% Moderate 7.4 Very High Excellent View Details
August best 30°C / 22°C 33°C / 23°C 4days (43 mm) Good 12.4h Excellent 62% Muggy 6.8 High Excellent View Details
September best 25°C / 18°C 26°C / 18°C 8days (103 mm) Wet 10.4h Excellent 70% Muggy 5.4 High Excellent View Details
October 21°C / 14°C 20°C / 12°C 9days (105 mm) Wet 8.8h Good 75% Muggy 3.8 Moderate Good View Details
November 16°C / 10°C 14°C / 7°C 14days (241 mm) Wet 6.5h Fair 78% Humid 2.3 Moderate Wet View Details
December 12°C / 6°C 10°C / 3°C 13days (161 mm) Wet 5.8h Fair 77% Humid 1.8 Low Poor View Details

What to Wear

Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

UmbrellaBreathable clothingSunscreen (SPF 30+)Sun hatSunglassesComfortable walking shoes

Frequently Asked Questions

September is typically excellent for visiting Split, with average highs of 25°C (78°F) and around 8 rainy days. Split, Croatia in September has warm conditions, with highs averaging 25.3°C (78°F). Sea temperature reaches 25°C (76°
Split typically sees around 8 rainy days in September with 103 mm (4.1 in) of total rainfall. An umbrella should suffice.
Evenings in Split during September are mild at 18°C (64°F). A light cardigan is usually enough.
With highs of 25°C (78°F) and lows of 18°C (64°F) in September, we recommend: Umbrella, Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses. Comfortable walking shoes are essential.
Yes, September offers some of the best weather conditions in Split with comfortable temperatures and lower chances of rain.
The average UV index in Split during September is 5 (moderate). Sunscreen and sunglasses are recommended during midday hours.
Split gets approximately 13 hours of daylight per day in September, with around 10 hours of sunshine.
Snow is uncommon in Split during September based on 10-year climate averages.

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