Celje in Spring
In spring (March, April and May), Celje sees average daytime highs around 15°C and overnight lows near 6°C, with 234 mm of precipitation over about 34 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs climb from about 8°C in early March to 21°C by late May. The sky is clear or mostly clear about 25% of the time across spring, and the air most often feels dry.
Spring is Celje's 2nd-best season to visit on our travel score. For the whole year in context, see Celje's year-round climate.
- Avg daytime high
- 15°C
- 2nd-warmest season
- Avg overnight low
- 6°C
- Precipitation
- 234 mm
- 34 wet days
- Avg wind
- 8 km/h
- Travel score
- 4.3
- 2nd-best season
- Months
- Mar · Apr · May
Temperature in Celje in Spring
Over the season highs climb from about 8°C in early March to 21°C by late May.
A typical spring day in Celje reaches about 15°C and drops to 6°C overnight. The warmest of the three months is May, the coolest March.
How spring really feels in Celje
Once humidity and wind are folded in, spring brings about 0 days that feel above 32°C and 23 that feel at or below 0°C.
The story in spring is cold — wind chill drags the overnight "feels like" below the raw low.
Celje weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 4° / -3° | 41 | 7.2 | 4.3 | 8.8 | 0.0 |
| Feb | 6° / -2° | 53 | 7.4 | 4.3 | 10 | 0.4 |
| Mar | 11° / 1° | 63 | 9.9 | 3.2 | 11.6 | 2.6 |
| Apr | 15° / 6° | 76 | 11.4 | 0.8 | 13.3 | 4.4 |
| May | 20° / 10° | 95 | 13 | 0 | 14.7 | 5.8 |
| Jun | 23° / 14° | 104 | 14 | 0 | 15.5 | 6.3 |
| Jul | 25° / 15° | 105 | 13.3 | 0 | 15.2 | 6.4 |
| Aug | 25° / 15° | 101 | 12.1 | 0 | 14 | 6.6 |
| Sep | 20° / 11° | 103 | 11.2 | 0 | 12.3 | 6.1 |
| Oct | 15° / 7° | 88 | 9.1 | 0.3 | 10.7 | 4.5 |
| Nov | 9° / 3° | 86 | 9.8 | 2.3 | 9.2 | 1.6 |
| Dec | 4° / -2° | 66 | 8.9 | 4.5 | 8.5 | 0.0 |
Cloud cover in Spring
The sky is clear or mostly clear about 25% of the time across spring.
Chance of precipitation in Spring
Celje gets around 234 mm of rain and snow over 34 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 8 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 10 h 48 min in early March to 15 h 18 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 4.4 kWh/m².
Is spring a good time to visit Celje?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a reasonable time to visit Celje for sightseeing.
What to pack for Celje in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Celje sees daytime highs around 15°C and nights near 6°C. Pack a warm layer. Worth having: rain gear and sun protection. About 34 days see rain.
UV index in Celje in Spring
Clear-sky midday UV across spring averages around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Celje peaks around July 15 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 4 | 7 | 7 | 8 | 8 | 7 | 5 | 3 | 2 | 1 |
| Level | Low | Low | Moderate | High | High | Very high | Very high | Very high | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 4 | Moderate |
| Apr | 7 | High |
| May | 7 | High |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 7 | Very high |
| Sep | 5 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Air quality in Celje in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in Celje is worst in April — around 17 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 16 | 15 | 17 | 17 | 15 | 15 | 14 | 13 | 12 | 12 | 12 | 14 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 16 | Moderate |
| Feb | 15 | Moderate |
| Mar | 17 | Moderate |
| Apr | 17 | Moderate |
| May | 15 | Moderate |
| Jun | 15 | Moderate |
| Jul | 14 | Moderate |
| Aug | 13 | Moderate |
| Sep | 12 | Good |
| Oct | 12 | Good |
| Nov | 12 | Good |
| Dec | 14 | Moderate |
Where is Celje?
Celje sits at 46.2°N, 15.3°E, 240 m above sea level, in Slovenia. The nearest listed city is Velenje, 18 km away.
Topography around Celje
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Celje.
Within 3 km, the terrain around Celje has significant variations in elevation — a maximum elevation change of 368 m around an average of 283 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 915 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,391 m.
The land around Celje is covered by trees (42%), artificial surfaces (25%) and grassland (24%) within 3 km, trees (62%) and grassland (27%) within 16 km, and trees (70%) within 80 km.
Slovenia travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 63% of US
- price level, 2025
- GDP per capita
- $37,376
- 2025
- Happiness
- 6.9 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 0.6
- per 100k, 2023
- Road deaths
- 5.1
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Celje (46.2309°, 15.2604°, elevation 240 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.