Vaasa weather in August

In August, Vaasa sees average daytime highs of 19°C and overnight lows near 11°C, with 70 mm of rain across 11.2 wet days and about 15.9 hours of daylight. It is the 2nd-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 17°C by the end. The sky is clear or mostly clear about 26% of the time in August, and the air most often feels dry.

Daylight stretches from about 17 h 24 min at the start of August to 14 h 18 min by month's end. Set against the rest of the year, August is Vaasa's 5th-clearest and 11th-windiest month. For the whole year in context, see Vaasa's year-round climate.

Daytime high
19°
2nd warmest
Overnight low
11°
11th coldest
Rainfall
70 mm
11.2 wet days
Daylight
15 h 54 min
4:41 AM – 8:34 PM
Cloud cover
63%
5th clearest
Wind
12 km/h
11th windiest
Solar energy
4.03 kWh/m²
Travel score
5.9
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 August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 17°C by the end.

A typical August day in Vaasa reaches about 19°C in the afternoon and slips back to 11°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 24°C. Set against its neighbours, August runs about 1°C cooler than July and about 5°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12113
22113
32113
42113
52112
62012
72012
82012
92012
102012
112012
122012
132012
142012
151911
161911
171911
181911
191911
201911
211911
221811
231811
241810
251810
261810
271810
281810
291710
301710
311710

How August really feels in Vaasa

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

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Vaasa weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 2nd-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 August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 17% of August, with mostly cloudy or overcast conditions the remaining 57%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24753
34753
44555
54654
64555
74555
84456
94357
104357
114357
124357
134357
144357
154357
164258
174258
184258
194258
204159
214258
224159
234060
244159
254159
264060
274060
283961
293961
304060
314060

Chance of precipitation in August

Any precipitation

Vaasa gets around 70 mm of rain over 11.2 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 36% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
337
437
537
637
737
837
936
1036
1136
1236
1336
1436
1536
1636
1736
1836
1936
2036
2136
2236
2336
2436
2536
2636
2736
2836
2935
3035
3135

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 67% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15037112
25236102
35236102
4543592
5553492
6563482
7573382
8593272
9603172
10613162
11633061
12643051
13652951
14662941
15672841
16682831
17692731
18712630
19712630
20732520
21732520
22742420
23742420
24752320
25762220
26772120
27782020
28801910
29811810
30821710
31831610

Wind in August

Winds average 12 km/h in August.

Across August, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 17 h 24 min at the start of August to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 186 minutes over August. Sunrise moves from 3:58 AM to 5:24 AM, and sunset from 9:21 PM to 7:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
117.43:589:21
217.34:019:18
317.24:039:15
417.14:069:12
517.04:099:09
616.94:129:06
716.84:159:03
816.74:189:00
916.64:218:57
1016.54:248:54
1116.44:278:50
1216.34:308:47
1316.24:338:44
1416.14:358:41
1516.04:388:37
1615.94:418:34
1715.84:448:31
1815.74:478:27
1915.64:508:24
2015.54:538:21
2115.44:568:17
2215.34:598:14
2315.15:028:10
2415.05:048:07
2514.95:078:04
2614.85:108:00
2714.75:137:57
2814.65:167:53
2914.55:197:50
3014.45:227:46
3114.35:247:43

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.03 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 — August's 4.03 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.7Bright
44.7Bright
54.6Bright
64.6Bright
74.5Bright
84.5Bright
94.4Bright
104.3Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.1Bright
164.0Bright
174.0Bright
184.0Moderate
193.9Moderate
203.8Moderate
213.8Moderate
223.7Moderate
233.7Moderate
243.6Moderate
253.5Moderate
263.5Moderate
273.4Moderate
283.4Moderate
293.3Moderate
303.3Moderate
313.2Moderate
Planning a trip in August

Is August a good time to visit Vaasa?

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

5.9
Sightseeing
2nd-best month of the year
2.6
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Vaasa for sightseeing.

What to pack for Vaasa in August

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

In August, Vaasa sees daytime highs around 19°C and nights near 11°C. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Vaasa in August

The nearest coast averages about 16°C in August — 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 August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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
August 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).