Västerås weather in May

In May, Västerås sees average daytime highs of 16°C and overnight lows near 5°C, with 49 mm of precipitation across 9.6 wet days and about 16.7 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 14°C in the first days to 18°C by the end. The sky is clear or mostly clear about 23% of the time in May, and the air most often feels dry.

Daylight stretches from about 15 h 30 min at the start of May to 17 h 42 min by month's end. Set against the rest of the year, May is Västerås's 1st-clearest and 9th-windiest month. For the whole year in context, see Västerås's year-round climate.

Daytime high
16°
4th warmest
Overnight low
8th coldest
Precipitation
49 mm
9.6 wet days
Daylight
16 h 42 min
3:29 AM – 8:11 PM
Cloud cover
64%
1st clearest
Wind
11 km/h
9th windiest
Solar energy
5.15 kWh/m²
Travel score
5.1
out of 10

Västerås is urban area in Västerås Municipality, Sweden.

Air quality
Good
PM2.5 6 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 14°C in the first days to 18°C by the end.

A typical May day in Västerås reaches about 16°C in the afternoon and slips back to 5°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 24°C. Set against its neighbours, May runs about 6°C warmer than April and about 4°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1143
2143
3143
4143
5153
6153
7154
8154
9154
10154
11164
12164
13164
14165
15165
16165
17165
18175
19176
20176
21176
22176
23176
24186
25187
26187
27187
28187
29187
30197
31197

How May really feels in Västerås

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.

Västerås weather by month

How May compares with the rest of the year at a glance. May is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°378.15.76.50.0
Feb / -5°297.45.88.70.0
Mar / -3°307.54.611.30.3
Apr11° / 377.81.614.12.7
May16° / 499.60.216.75.1
Jun20° / 6811.5018.25.9
Jul22° / 12°7512.1017.66.3
Aug21° / 11°7312.3015.36.0
Sep16° / 528.8012.65.0
Oct10° / 529.90.69.82.1
Nov / -0°479.437.30.1
Dec / -3°459.95.95.80.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% 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 59%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33862
44060
54060
64060
74060
84060
94060
104159
114159
124159
134159
144159
154159
164060
174159
184060
194060
203961
213961
223961
233961
244060
254258
264258
274258
284357
294357
304357
314555

Chance of precipitation in May

Any precipitationSnow

Västerås gets around 49 mm of rain and snow over 9.6 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 30% and peaks near 32% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1272
2282
3282
4282
5281
6291
7291
8291
9291
10291
11291
12301
13301
14301
15301
16301
17311
18311
19311
20321
21320
22320
23320
24320
25320
26320
27320
28320
29310
30310
31310

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 (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
12991
13991
14991
15991
16991
17982
18982
19982
20982
21982
22982
23982
24982
25982
26982
27982
28982
29973
30973
31973

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 30 min at the start of May to 17 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 132 minutes over May. Sunrise moves from 4:06 AM to 3:00 AM, and sunset from 7:36 PM to 8:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.54:067:36
215.64:047:38
315.74:017:41
415.73:587:43
515.83:567:45
615.93:537:48
716.03:507:50
816.13:487:53
916.23:457:55
1016.23:437:57
1116.33:408:00
1216.43:388:02
1316.53:368:04
1416.63:338:07
1516.63:318:09
1616.73:298:11
1716.83:278:14
1816.93:248:16
1916.93:228:18
2017.03:208:20
2117.13:188:22
2217.13:168:25
2317.23:148:27
2417.33:128:29
2517.33:108:31
2617.43:088:33
2717.53:078:35
2817.53:058:37
2917.63:038:39
3017.63:028:40
3117.73:008:42

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.15 kWh/m².

For context, solar energy here swings from a low near 0.2 kWh/m² to a high of 5.45 kWh/m² in June across the year — May's 5.15 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
135.1Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.4Bright
255.4Bright
265.4Bright
275.4Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in May

Is May a good time to visit Västerås?

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

5.1
Sightseeing
4th-best month of the year
1.0
Beach & pool
4th-best month of the year

May is a reasonable time to visit Västerås for sightseeing.

What to pack for Västerås in May

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

In May, Västerås sees daytime highs around 16°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

UV index in Västerås 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 Västerås peaks around June 16 at about 5 (moderate) — 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJun 16UV 5Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun5High
Jul4Moderate
Aug4Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Västerås?

Västerås sits at 59.6°N, 16.6°E, 16 m above sea level, in Sweden. The nearest listed city is Eskilstuna, 28 km away.

Topography around Västerås

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

Within 3 km, the terrain around Västerås has only modest variations in elevation — a maximum elevation change of 61 m around an average of 23 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 95 m; within 80 km, significant variations in elevation — a maximum elevation change of 388 m.

The land around Västerås is covered by artificial surfaces (40%) and trees (36%) within 3 km, trees (45%) and cropland (23%) within 16 km, and trees (63%) within 80 km.

3 km
61 m
16 km
95 m
80 km
388 m
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Eskilstuna 28 km · Enköping 30 km · Köping 34 km · Uppsala 67 km · Gamla Uppsala 68 km · Katrineholm 72 km · Märsta 73 km · Jakobsberg 75 km

Sweden travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 87% of US
price level, 2025
GDP per capita
$63,133
2025
Happiness
7.3 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2023
Road deaths
3.1
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 609
Religion
Church of Sweden 54%none or unspecified 37%other 9%

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 Västerås (59.6162°, 16.5528°, elevation 16 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. 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).