Kouvola weather in May

In May, Kouvola sees average daytime highs of 15°C and overnight lows near 5°C, with 46 mm of precipitation across 9.9 wet days and about 17 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 13°C in the first days to 17°C by the end. The sky is clear or mostly clear about 27% of the time in May, and the air most often feels dry.

Daylight stretches from about 15 h 42 min at the start of May to 18 h 06 min by month's end. Set against the rest of the year, May is Kouvola's 1st-clearest and 9th-windiest month. For the whole year in context, see Kouvola's year-round climate.

Daytime high
15°
4th warmest
Overnight low
8th coldest
Precipitation
46 mm
9.9 wet days
Daylight
17 hours
3:40 AM – 8:39 PM
Cloud cover
62%
1st clearest
Wind
11 km/h
9th windiest
Solar energy
5.2 kWh/m²
Travel score
4.7
out of 10
Air quality
Excellent
PM10 11.4 µg/m³ · 2019

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 13°C in the first days to 17°C by the end.

A typical May day in Kouvola reaches about 15°C in the afternoon and slips back to 5°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 22°C. Set against its neighbours, May runs about 7°C warmer than April and about 4°C cooler than June.

10°20°151015202531
Avg high (°C)Avg low (°C)
1123
2133
3133
4133
5133
6144
7144
8144
9144
10144
11144
12155
13155
14155
15155
16155
17166
18166
19166
20166
21166
22166
23177
24177
25177
26177
27177
28178
29188
30188
31188

How May really feels in Kouvola

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 2 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
2
wind chill below the day's low

The story in May is cold — wind chill drags the overnight "feels like" below the raw low.

Kouvola weather by month

How May compares with the rest of the year at a glance. May is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-3° / -8°4410.610.86.20.0
Feb-3° / -9°4099.18.50.0
Mar / -6°368.77.811.30.0
Apr / -0°358.92.814.21.5
May15° / 469.90.2174.7
Jun19° / 10°7011.8018.65.8
Jul22° / 13°6711.6017.96.4
Aug20° / 12°6610.9015.56.1
Sep15° / 539.9012.64.3
Oct / 5710.91.29.71.2
Nov / -1°5411.35.270.0
Dec-1° / -5°5411.79.65.40.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in May, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
24060
34060
44060
54060
64159
74159
84159
94159
104159
114258
124258
134258
144159
154159
164060
174060
184159
194060
204060
214060
224060
234159
244159
254159
264159
274258
284357
294357
304357
314357

Chance of precipitation in May

Any precipitationSnow

Kouvola gets around 46 mm of rain and snow over 9.9 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 31% and peaks near 35% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1303
2303
3302
4302
5302
6302
7302
8301
9301
10301
11291
12291
13291
14291
15291
16300
17300
18310
19310
20320
21320
22330
23330
24340
25340
26340
27340
28340
29350
30350
31350

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
110000
210000
310000
410000
510000
610000
710000
810000
910000
109910
119910
129910
139910
149910
159820
169820
179820
189820
199820
209730
219730
229730
239631
249631
259541
269541
279541
289541
299541
309541
319541

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 15 h 42 min at the start of May to 18 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 144 minutes over May. Sunrise moves from 4:20 AM to 3:08 AM, and sunset from 8:01 PM to 9:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.74:208:01
215.84:178:04
315.94:148:06
416.04:118:09
516.04:088:11
616.14:068:14
716.24:038:17
816.34:008:19
916.43:588:22
1016.53:558:24
1116.63:528:27
1216.73:508:29
1316.73:478:32
1416.83:458:34
1516.93:428:37
1617.03:408:39
1717.13:378:42
1817.23:358:44
1917.23:328:47
2017.33:308:49
2117.43:288:51
2217.53:268:54
2317.53:248:56
2417.63:218:58
2517.73:199:00
2617.83:179:03
2717.83:159:05
2817.93:149:07
2918.03:129:09
3018.03:109:11
3118.13:089:13

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.2 kWh/m².

For context, solar energy here swings from a low near 0.13 kWh/m² to a high of 5.4 kWh/m² in June across the year — May's 5.2 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.7Bright
34.7Bright
44.8Bright
54.8Bright
64.9Bright
74.9Bright
85.0Bright
95.0Bright
105.0Bright
115.1Bright
125.1Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in May

Is May a good time to visit Kouvola?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.7
Sightseeing
4th-best month of the year
0.6
Beach & pool
4th-best month of the year

May is a reasonable time to visit Kouvola for sightseeing.

What to pack for Kouvola in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Kouvola sees daytime highs around 15°C and nights near 5°C. Worth packing: a warm layer, rain gear and sun protection. About 10 days see rain.

a warm layerrain gearsun protection

Sea temperature near Kouvola in May

The nearest coast averages about 6°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 55 km away) is warmest in August at about 17°C and coldest in February near 0°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan1Bracing
Feb0Bracing
Mar0Bracing
Apr2Bracing
May6Bracing
Jun12Bracing
Jul16Cool
Aug17Cool
Sep14Bracing
Oct10Bracing
Nov7Bracing
Dec4Bracing

UV index in Kouvola in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks 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 Kouvola peaks around June 20 at about 5 (high) — a little sun protection helps at midday. It bottoms out near December 19 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 4 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateModerateLowJun 20UV 5Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun5High
Jul5Moderate
Aug4Moderate
Sep2Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Kouvola?

Kouvola sits at 60.9°N, 26.7°E, 81 m above sea level, in Finland. The nearest listed city is Anjala, 22 km away.

Topography around Kouvola

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Kouvola.

Within 3 km, the terrain around Kouvola has only modest variations in elevation — a maximum elevation change of 78 m around an average of 67 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 105 m; within 80 km, only modest variations in elevation — a maximum elevation change of 228 m.

The land around Kouvola is covered by trees (52%) and artificial surfaces (28%) within 3 km, trees (61%) and cropland (21%) within 16 km, and trees (65%) and water (23%) within 80 km.

3 km
78 m
16 km
105 m
80 km
228 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Anjala 22 km · Karhula 40 km · Hamina 43 km · Kotka 46 km · Heinola 52 km · Orimattila 53 km · Lahti 58 km · Hollola 66 km

Finland travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 85% of US
price level, 2025
GDP per capita
$56,149
2025
Happiness
7.8 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1
per 100k, 2023
Road deaths
3.9
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 603
Religion
Lutheran 67%none 31%other 2%Greek Orthodox 1%

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 Kouvola (60.8667°, 26.7°, elevation 81 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).