Vaasa weather in May

In May, Vaasa sees average daytime highs of 13°C and overnight lows near 4°C, with 42 mm of precipitation across 8.4 wet days and about 17.6 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 11°C in the first days to 15°C by the end. The sky is clear or mostly clear about 34% of the time in May, and the air most often feels dry.

Daylight stretches from about 16 h 06 min at the start of May to 18 h 54 min by month's end. Set against the rest of the year, May is Vaasa's 1st-clearest and 9th-windiest month. For the whole year in context, see Vaasa's year-round climate.

Daytime high
13°
5th warmest
Overnight low
8th coldest
Precipitation
42 mm
8.4 wet days
Daylight
17 h 36 min
3:42 AM – 9:17 PM
Cloud cover
56%
1st clearest
Wind
13 km/h
9th windiest
Solar energy
5.45 kWh/m²
Travel score
3.7
out of 10
Air quality
Excellent
PM2.5 3.9 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 11°C in the first days to 15°C by the end.

A typical May day in Vaasa reaches about 13°C in the afternoon and slips back to 4°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 19°C. Set against its neighbours, May runs about 6°C warmer than April and about 5°C cooler than June.

10°20°151015202531
Avg high (°C)Avg low (°C)
1102
2102
3112
4112
5113
6113
7113
8113
9123
10123
11123
12124
13124
14124
15134
16134
17134
18134
19135
20135
21135
22145
23145
24145
25146
26146
27146
28156
29156
30156
31157

How May really feels in Vaasa

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 10 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
10
wind chill below the day's low

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

Vaasa weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-2° / -7°359.38.75.40.0
Feb-3° / -8°287.27.18.10.0
Mar / -5°307.56.111.20.0
Apr / -0°327.83.314.51.0
May13° / 428.40.217.63.7
Jun17° / 5910.4019.65.5
Jul20° / 12°7011018.76.2
Aug19° / 11°7011.2015.95.9
Sep14° / 539.7012.74.1
Oct / 5510.51.99.41.1
Nov / -1°4810.24.56.40.0
Dec-0° / -4°4510.57.44.40.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in May, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of May, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24852
34951
44951
55050
65050
75149
85149
95248
105248
115347
125347
135446
145347
155347
165347
175347
185347
195347
205248
215248
225248
235248
245248
255248
265248
275248
285248
295248
305248
315248

Chance of precipitation in May

Any precipitationSnow

Vaasa gets around 42 mm of rain and snow over 8.4 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 27% and peaks near 29% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1263
2262
3262
4262
5262
6261
7261
8261
9261
10261
11261
12261
13261
14261
15261
16271
17271
18271
19281
20281
21280
22290
23290
24290
25290
26290
27290
28290
29290
30290
31290

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 99% 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
1010000
119910
129910
139910
149910
159910
169910
179910
189910
199910
209910
219910
229910
239910
249910
259910
269910
279811
289721
299721
309721
319721

Wind in May

Winds average 13 km/h in May.

Across May, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 16 h 06 min at the start of May to 18 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 168 minutes over May. Sunrise moves from 4:28 AM to 3:04 AM, and sunset from 8:33 PM to 9:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
116.14:288:33
216.24:258:36
316.34:228:39
416.44:198:42
516.54:158:45
616.64:128:48
716.74:098:51
816.84:068:54
916.94:038:57
1017.04:009:00
1117.13:579:03
1217.23:549:06
1317.33:519:09
1417.43:489:12
1517.53:459:15
1617.63:429:17
1717.73:399:20
1817.83:369:23
1917.93:349:26
2018.03:319:29
2118.13:289:32
2218.13:269:34
2318.23:239:37
2418.33:219:40
2518.43:189:42
2618.53:169:45
2718.63:139:48
2818.73:119:50
2918.73:099:53
3018.83:069:55
3118.93:049:58

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.45 kWh/m².

For context, solar energy here swings from a low near 0.08 kWh/m² to a high of 5.93 kWh/m² in June across the year — May's 5.45 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.9Bright
44.9Bright
55.0Bright
65.0Bright
75.1Bright
85.2Bright
95.2Bright
105.2Bright
115.3Bright
125.3Bright
135.4Bright
145.4Bright
155.4Bright
165.5Bright
175.5Bright
185.5Bright
195.6Bright
205.6Bright
215.6Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.9Bright
315.9Bright
Planning a trip in May

Is May a good time to visit Vaasa?

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

3.7
Sightseeing
5th-best month of the year
0.0
Beach & pool
5th-best month of the year

May is a weaker month for outdoor sightseeing in Vaasa.

What to pack for Vaasa in May

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

In May, Vaasa sees daytime highs around 13°C and nights near 4°C. Worth packing: a warm layer, rain gear and sun protection. About 8 days see rain.

a warm layerrain gearsun protection

Sea temperature near Vaasa in May

The nearest coast averages about 5°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 13 km away) is warmest in August at about 16°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°5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan1Bracing
Feb0Bracing
Mar0Bracing
Apr1Bracing
May5Bracing
Jun10Bracing
Jul15Bracing
Aug16Cool
Sep13Bracing
Oct9Bracing
Nov5Bracing
Dec3Bracing

UV index in Vaasa 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 Vaasa peaks around June 18 at about 4 (moderate) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJun 18UV 4Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar1Low
Apr2Moderate
May4Moderate
Jun4Moderate
Jul4Moderate
Aug4Moderate
Sep2Low
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Vaasa?

Vaasa sits at 63.1°N, 21.6°E, 7 m above sea level, in Finland. The nearest listed city is Korsholm, 4.0 km away.

KurikkaSeinäjokiKauhavaJakobstadUmeåKokkola

Topography around Vaasa

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

Within 3 km, the terrain around Vaasa has only modest variations in elevation — a maximum elevation change of 28 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 73 m; within 80 km, only modest variations in elevation — a maximum elevation change of 211 m.

The land around Vaasa is covered by water (36%), trees (29%) and artificial surfaces (29%) within 3 km, trees (50%) and water (28%) within 16 km, and water (47%) and trees (39%) within 80 km.

3 km
28 m
16 km
73 m
80 km
211 m
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Korsholm 4.0 km · Kurikka 67 km · Seinäjoki 70 km · Kauhava 73 km · Jakobstad 84 km · Umeå 106 km · Kokkola 112 km · Örnsköldsvik 147 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 Vaasa (63.096°, 21.6158°, elevation 7 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).