Koszalin in Spring
In spring (March, April and May), Koszalin sees average daytime highs around 11°C and overnight lows near 4°C, with 143 mm of precipitation over about 30 wet days across the season. It is the 3rd-warmest season and the driest season of the year.
Over the season highs climb from about 5°C in early March to 18°C by late May. The sky is clear or mostly clear about 27% of the time across spring, and the air most often feels dry.
Spring is Koszalin's 3rd-best season to visit on our travel score. For the whole year in context, see Koszalin's year-round climate.
- Avg daytime high
- 11°C
- 3rd-warmest season
- Avg overnight low
- 4°C
- Precipitation
- 143 mm
- 30 wet days
- Avg wind
- 16 km/h
- Travel score
- 2.9
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Koszalin in Spring
Over the season highs climb from about 5°C in early March to 18°C by late May.
A typical spring day in Koszalin reaches about 11°C and drops to 4°C overnight. The warmest of the three months is May, the coolest March.
How spring really feels in Koszalin
Once humidity and wind are folded in, spring brings about 0 days that feel above 32°C and 47 that feel at or below 0°C.
The story in spring is cold — wind chill drags the overnight "feels like" below the raw low.
Koszalin 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 | 2° / -1° | 54 | 11.7 | 4.5 | 7.7 | 0.0 |
| Feb | 3° / -1° | 44 | 10.2 | 4.5 | 9.3 | 0.0 |
| Mar | 6° / 0° | 49 | 10.3 | 3 | 11.5 | 0.6 |
| Apr | 11° / 4° | 38 | 9 | 0.5 | 13.7 | 3.0 |
| May | 16° / 8° | 56 | 10.8 | 0.1 | 15.7 | 5.0 |
| Jun | 19° / 12° | 71 | 12 | 0 | 16.8 | 5.8 |
| Jul | 21° / 14° | 90 | 13.3 | 0 | 16.4 | 6.1 |
| Aug | 22° / 14° | 78 | 13.4 | 0 | 14.6 | 6.1 |
| Sep | 18° / 11° | 68 | 12.2 | 0 | 12.5 | 5.2 |
| Oct | 12° / 7° | 66 | 12.5 | 0.1 | 10.2 | 3.1 |
| Nov | 7° / 3° | 53 | 11.8 | 1.3 | 8.2 | 0.8 |
| Dec | 4° / 0° | 58 | 12.4 | 4 | 7.2 | 0.0 |
Cloud cover in Spring
The sky is clear or mostly clear about 27% of the time across spring.
Chance of precipitation in Spring
Koszalin gets around 143 mm of rain and snow over 30 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 16 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 10 h 24 min in early March to 16 h 30 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 4.2 kWh/m².
Is spring a good time to visit Koszalin?
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 weaker month for outdoor sightseeing in Koszalin.
What to pack for Koszalin in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Koszalin sees daytime highs around 11°C and nights near 4°C. Pack a warm layer. Worth having: a heavy coat, rain gear and sun protection. About 30 days see rain.
Sea temperature near Koszalin in Spring
The nearest coast averages about 6°C across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 20 km away) is warmest in August at about 19°C and coldest in February near 3°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 4 | 3 | 3 | 5 | 9 | 14 | 17 | 19 | 16 | 13 | 9 | 6 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Cool | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 4 | Bracing |
| Feb | 3 | Bracing |
| Mar | 3 | Bracing |
| Apr | 5 | Bracing |
| May | 9 | Bracing |
| Jun | 14 | Bracing |
| Jul | 17 | Cool |
| Aug | 19 | Cool |
| Sep | 16 | Cool |
| Oct | 13 | Bracing |
| Nov | 9 | Bracing |
| Dec | 6 | Bracing |
UV index in Koszalin in Spring
Clear-sky midday UV across spring averages around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Koszalin peaks around June 17 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 20 at about 0 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 1 | 3 | 4 | 5 | 6 | 5 | 5 | 4 | 2 | 1 | 0 |
| Level | Low | Low | Moderate | Moderate | High | High | High | High | Moderate | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 3 | Moderate |
| Apr | 4 | Moderate |
| May | 5 | High |
| Jun | 6 | High |
| Jul | 5 | High |
| Aug | 5 | High |
| Sep | 4 | Moderate |
| Oct | 2 | Low |
| Nov | 1 | Low |
| Dec | 0 | Low |
Air quality in Koszalin 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 Koszalin is worst in April — around 18 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 8 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Koszalin's WHO annual average of 13.7 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 11 | 13 | 17 | 18 | 16 | 16 | 16 | 15 | 14 | 11 | 9 | 8 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 13 | Moderate |
| Mar | 17 | Moderate |
| Apr | 18 | Moderate |
| May | 16 | Moderate |
| Jun | 16 | Moderate |
| Jul | 16 | Moderate |
| Aug | 15 | Moderate |
| Sep | 14 | Moderate |
| Oct | 11 | Good |
| Nov | 9 | Good |
| Dec | 8 | Good |
Where is Koszalin?
Koszalin sits at 54.2°N, 16.2°E, 30 m above sea level, in Poland. The nearest listed city is Białogard, 24 km away.
Topography around Koszalin
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Koszalin.
Within 3 km, the terrain around Koszalin has only modest variations in elevation — a maximum elevation change of 106 m around an average of 39 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 153 m; within 80 km, significant variations in elevation — a maximum elevation change of 264 m.
The land around Koszalin is covered by artificial surfaces (38%) and trees (35%) within 3 km, trees (38%), cropland (23%) and grassland (20%) within 16 km, and trees (38%), water (27%) and cropland (22%) within 80 km.
Poland travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / E
- 230 V · 50 Hz
- Prices
- ≈ 52% of US
- price level, 2025
- GDP per capita
- $28,420
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 89%
- of population, 2024
- Homicide rate
- 0.8
- per 100k, 2023
- Road deaths
- 9.4
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very high
- EF EPI 600
- 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 Koszalin (54.1944°, 16.1722°, elevation 30 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.