Kasaze, Slovenia — Weather in December 2026

Monthly climate averages for Kasaze, Slovenia. Based on 10-year ERA5 reanalysis data.

Cfa Humid Subtropical
1.9 /10
Poor

December is a poor month in Kasaze

Climate Overview

Kasaze, Slovenia in December has cold conditions, with highs averaging around 6.2°C (43°F).

This month falls at the beginning of Winter. Cold conditions dominate the month.

Daily highs in December gradually rise from around 5°C (41°F) at the start to 7°C (45°F) by month's end.

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

Expect around 4.4h of sunshine at the start of December, increasing to 6.3h by the end.

The warmest days tend to fall around the 25th, averaging 7.2°C (45°F).

Compared to November, this month is about 4°C cooler with 1 fewer rainy days.

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Monthly December Averages

Temperature
6°C / 0°C
Feels Like
4°C / -3°C
Rain
9 days · 66 mm
Sunshine
4.9h / day
Humidity
85% — Very Humid
Wind
9 km/h
Wind Direction
NW (315°)
Gusts
27 km/h
Daylight
8.7 h
Cloud Cover
66%
Clear Sky Days
3.5
UV Index
1.3 — Low
Dew Point
1°C — Dry
Moon Phase
Waxing Crescent · 31%
Snow Days
6 days · 12.8 cm
Frost Days
17 days

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

12°C 9°C 6°C 3°C 0°C -3°C -6°C 151015202531
High Low

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 8 mm 151015202531
Rainfall

Daily Sunshine

0h 2h 4h 6h 8h 10h 151015202531
Sunshine

Daily Wind Speed

0 4 8 12 16 20 151015202531
Wind Speed
Sun Position
Sunrise 07:35
Daylight 8.6h
Sunset 16:13

What to Expect

Cold daytime highs of 6°C (43°F) mean shorter outdoor excursions with warming breaks.

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
6°C / -2°C
Feels Like
3°C / -5°C
Rain
8days (55 mm) Wet
Sun
5.4h Fair
Humidity
81% Humid
UV
1.6 Low
Snow Days
9days
View Details
February
Poor
Temp
8°C / 0°C
Feels Like
5°C / -3°C
Rain
8days (60 mm) Wet
Sun
6.4h Fair
Humidity
78% Humid
UV
2.2 Moderate
Snow Days
5days
View Details
March
Fair
Temp
12°C / 2°C
Feels Like
9°C / -1°C
Rain
10days (63 mm) Wet
Sun
8.3h Good
Humidity
72% Muggy
UV
3.4 Moderate
Snow Days
3days
View Details
April
Fair
Temp
16°C / 6°C
Feels Like
14°C / 4°C
Rain
10days (77 mm) Wet
Sun
9.7h Good
Humidity
71% Muggy
UV
4.9 Moderate
Snow Days
2days
View Details
May
Wet
Temp
19°C / 10°C
Feels Like
19°C / 9°C
Rain
18days (135 mm) Wet
Sun
9.9h Good
Humidity
77% Humid
UV
5.7 High
View Details
June best
Excellent
Temp
25°C / 16°C
Feels Like
27°C / 16°C
Rain
13days (87 mm) Wet
Sun
11.8h Excellent
Humidity
74% Muggy
UV
6.7 High
View Details
July best
Excellent
Temp
27°C / 17°C
Feels Like
29°C / 18°C
Rain
14days (114 mm) Wet
Sun
12.1h Excellent
Humidity
71% Muggy
UV
6.5 High
View Details
August best
Excellent
Temp
27°C / 17°C
Feels Like
29°C / 18°C
Rain
12days (96 mm) Wet
Sun
10.9h Excellent
Humidity
73% Muggy
UV
6 High
View Details
September best
Excellent
Temp
22°C / 13°C
Feels Like
22°C / 13°C
Rain
12days (109 mm) Wet
Sun
8.7h Good
Humidity
78% Humid
UV
4.4 Moderate
View Details
October best
Good
Temp
17°C / 9°C
Feels Like
16°C / 7°C
Rain
9days (76 mm) Wet
Sun
7h Good
Humidity
82% Humid
UV
2.9 Moderate
View Details
November
Poor
Temp
10°C / 4°C
Feels Like
8°C / 1°C
Rain
10days (90 mm) Wet
Sun
4.8h Fair
Humidity
86% Very Muggy
UV
1.9 Low
Snow Days
3days
View Details
December
Poor
Temp
6°C / 0°C
Feels Like
4°C / -3°C
Rain
9days (66 mm) Wet
Sun
4.9h Fair
Humidity
85% Humid
UV
1.3 Low
Snow Days
6days
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
January 6°C / -2°C 3°C / -5°C 8days (55 mm) Wet 5.4h Fair 81% Humid 1.6 Low Poor View Details
February 8°C / 0°C 5°C / -3°C 8days (60 mm) Wet 6.4h Fair 78% Humid 2.2 Moderate Poor View Details
March 12°C / 2°C 9°C / -1°C 10days (63 mm) Wet 8.3h Good 72% Muggy 3.4 Moderate Fair View Details
April 16°C / 6°C 14°C / 4°C 10days (77 mm) Wet 9.7h Good 71% Muggy 4.9 Moderate Fair View Details
May 19°C / 10°C 19°C / 9°C 18days (135 mm) Wet 9.9h Good 77% Humid 5.7 High Wet View Details
June best 25°C / 16°C 27°C / 16°C 13days (87 mm) Wet 11.8h Excellent 74% Muggy 6.7 High Excellent View Details
July best 27°C / 17°C 29°C / 18°C 14days (114 mm) Wet 12.1h Excellent 71% Muggy 6.5 High Excellent View Details
August best 27°C / 17°C 29°C / 18°C 12days (96 mm) Wet 10.9h Excellent 73% Muggy 6 High Excellent View Details
September best 22°C / 13°C 22°C / 13°C 12days (109 mm) Wet 8.7h Good 78% Humid 4.4 Moderate Excellent View Details
October best 17°C / 9°C 16°C / 7°C 9days (76 mm) Wet 7h Good 82% Humid 2.9 Moderate Good View Details
November 10°C / 4°C 8°C / 1°C 10days (90 mm) Wet 4.8h Fair 86% Very Muggy 1.9 Low Poor View Details
December 6°C / 0°C 4°C / -3°C 9days (66 mm) Wet 4.9h Fair 85% Humid 1.3 Low Poor View Details

What to Wear

Full winter gear is a must — insulated coat, thermal base layers, warm hat, gloves, and waterproof boots.

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

Packing List

Warm coatThermal base layersScarf & glovesUmbrellaComfortable walking shoes

Frequently Asked Questions

December is typically poor for visiting Kasaze, with average highs of 6°C (43°F) and around 9 rainy days. Kasaze, Slovenia in December has cold conditions, with highs averaging around 6.2°C (43°F).
Kasaze typically sees around 9 rainy days in December with 66 mm (2.6 in) of total rainfall. An umbrella should suffice.
Yes, nights in Kasaze during December are cold, averaging 0°C (32°F). Pack warm layers and a coat for evenings.
With highs of 6°C (43°F) and lows of 0°C (32°F) in December, we recommend: Warm coat, Thermal base layers, Scarf & gloves, Umbrella, Comfortable walking shoes. Comfortable walking shoes are essential.
December is not the most favourable month weather-wise in Kasaze. Consider visiting during months with milder temperatures or less rainfall for a better experience.
The average UV index in Kasaze during December is 1 (low). No special sun protection is needed.
Kasaze gets approximately 9 hours of daylight per day in December, with around 5 hours of sunshine.
Yes, Kasaze typically sees around 6 snow days in December with roughly 13 cm (5 in) of snowfall.

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