Lerum weather in May

In May, Lerum sees average daytime highs of 16°C and overnight lows near 6°C, with 68 mm of precipitation across 11.7 wet days and about 16.3 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 14°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 12 min at the start of May to 17 h 12 min by month's end. Set against the rest of the year, May is Lerum's 1st-clearest and 10th-windiest month. For the whole year in context, see Lerum's year-round climate.

Daytime high: 16°; 5th warmest
Overnight low: 6°; 8th coldest
Precipitation: 68 mm; 11.7 wet days
Daylight: 16 h 18 min; 3:57 AM – 8:17 PM
Cloud cover: 60%; 1st clearest
Wind: 12 km/h; 10th windiest
Solar energy: 5.35 kWh/m²
Travel score: 4.6; out of 10

← April Lerum year-round climate June →Best places to visit in May

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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 17°C by the end.

A typical May day in Lerum reaches about 16°C in the afternoon and slips back to 6°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 23°C. Set against its neighbours, May runs about 5°C warmer than April and about 3°C cooler than June.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	14	14	14	14	14	14	14	15	15	15	15	15	15	15	15	15	16	16	16	16	16	16	16	17	17	17	17	17	17	17	18
Avg low (°C)	4	4	5	5	5	5	5	5	5	5	5	6	6	6	6	6	6	7	7	7	7	7	7	7	8	8	8	8	8	8	8

	Avg high (°C)	Avg low (°C)
1	14	4
2	14	4
3	14	5
4	14	5
5	14	5
6	14	5
7	14	5
8	15	5
9	15	5
10	15	5
11	15	5
12	15	6
13	15	6
14	15	6
15	15	6
16	15	6
17	16	6
18	16	7
19	16	7
20	16	7
21	16	7
22	16	7
23	16	7
24	17	7
25	17	8
26	17	8
27	17	8
28	17	8
29	17	8
30	17	8
31	18	8

How May really feels in Lerum

Once humidity and wind are folded in, May 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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

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

Lerum 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.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	2° / -3°	72	12	6.1	7	0.0
Feb	2° / -3°	56	10.1	6	8.9	0.0
Mar	5° / -1°	50	10.2	4.3	11.4	0.3
Apr	11° / 2°	53	10.2	1	14	2.6
May	16° / 6°	68	11.7	0.1	16.3	4.6
Jun	18° / 10°	91	13	0	17.6	5.5
Jul	21° / 12°	90	13.5	0	17.1	5.9
Aug	20° / 12°	106	14.9	0	15.1	5.6
Sep	16° / 9°	86	12.8	0	12.5	4.5
Oct	11° / 5°	87	13.9	0.5	10	2.3
Nov	6° / 2°	68	12.6	1.7	7.6	0.4
Dec	3° / -1°	74	12.6	4.8	6.3	0.0

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 18% of May, with mostly cloudy or overcast conditions the remaining 55%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	44	44	44	45	45	45	46	47	47	47	48	47	48	46	47	46	45	44	44	44	43	43	44	43	43	44	45	46	46	47	47
Cloudier (%)	56	56	56	55	55	55	54	53	53	53	52	53	52	54	53	54	55	56	56	56	57	57	56	57	57	56	55	54	54	53	53

	Clearer (%)	Cloudier (%)
1	44	56
2	44	56
3	44	56
4	45	55
5	45	55
6	45	55
7	46	54
8	47	53
9	47	53
10	47	53
11	48	52
12	47	53
13	48	52
14	46	54
15	47	53
16	46	54
17	45	55
18	44	56
19	44	56
20	44	56
21	43	57
22	43	57
23	44	56
24	43	57
25	43	57
26	44	56
27	45	55
28	46	54
29	46	54
30	47	53
31	47	53

Chance of precipitation in May

Any precipitation

Lerum gets around 68 mm of rain and snow over 11.7 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 38% and peaks near 41% on the wettest days, and about 0 day brings snow.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	35	36	36	36	36	37	37	37	38	38	39	39	40	40	40	41	41	41	40	40	40	40	39	39	39	38	37	37	36	36	36

	Rain chance (%)
1	35
2	36
3	36
4	36
5	36
6	37
7	37
8	37
9	38
10	38
11	39
12	39
13	40
14	40
15	40
16	41
17	41
18	41
19	40
20	40
21	40
22	40
23	39
24	39
25	39
26	38
27	37
28	37
29	36
30	36
31	36

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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	99	99	99	98	98	98	97	97	97	97	96	96	96	96	96	96	96	96	96	96	96	96
Comfortable (%)	0	0	0	0	0	0	0	0	0	1	1	1	2	2	2	3	3	3	3	4	4	4	4	4	4	4	4	4	4	4	4

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	99	1
11	99	1
12	99	1
13	98	2
14	98	2
15	98	2
16	97	3
17	97	3
18	97	3
19	97	3
20	96	4
21	96	4
22	96	4
23	96	4
24	96	4
25	96	4
26	96	4
27	96	4
28	96	4
29	96	4
30	96	4
31	96	4

Wind in May

Winds average 12 km/h in May.

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

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	12	calm
2	12	calm
3	12	calm
4	12	calm
5	12	calm
6	12	calm
7	12	calm
8	12	calm
9	12	calm
10	12	calm
11	12	calm
12	12	calm
13	12	calm
14	12	calm
15	12	calm
16	12	calm
17	12	calm
18	12	calm
19	12	calm
20	12	calm
21	12	calm
22	12	calm
23	12	calm
24	12	calm
25	12	calm
26	12	calm
27	12	calm
28	12	calm
29	12	calm
30	12	calm
31	12	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 15 h 12 min at the start of May to 17 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 120 minutes over May. Sunrise moves from 4:31 AM to 3:32 AM, and sunset from 7:45 PM to 8:45 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	15.2	15.3	15.4	15.5	15.5	15.6	15.7	15.8	15.8	15.9	16.0	16.1	16.1	16.2	16.3	16.3	16.4	16.5	16.5	16.6	16.7	16.7	16.8	16.8	16.9	17.0	17.0	17.1	17.1	17.2	17.2
Sunrise (AM)	4:31	4:29	4:26	4:24	4:21	4:19	4:17	4:14	4:12	4:10	4:08	4:05	4:03	4:01	3:59	3:57	3:55	3:53	3:51	3:49	3:47	3:46	3:44	3:42	3:41	3:39	3:37	3:36	3:34	3:33	3:32
Sunset (PM)	7:45	7:47	7:49	7:52	7:54	7:56	7:58	8:00	8:03	8:05	8:07	8:09	8:11	8:13	8:15	8:17	8:19	8:21	8:23	8:25	8:27	8:29	8:31	8:33	8:35	8:36	8:38	8:40	8:42	8:43	8:45

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	15.2	4:31	7:45
2	15.3	4:29	7:47
3	15.4	4:26	7:49
4	15.5	4:24	7:52
5	15.5	4:21	7:54
6	15.6	4:19	7:56
7	15.7	4:17	7:58
8	15.8	4:14	8:00
9	15.8	4:12	8:03
10	15.9	4:10	8:05
11	16.0	4:08	8:07
12	16.1	4:05	8:09
13	16.1	4:03	8:11
14	16.2	4:01	8:13
15	16.3	3:59	8:15
16	16.3	3:57	8:17
17	16.4	3:55	8:19
18	16.5	3:53	8:21
19	16.5	3:51	8:23
20	16.6	3:49	8:25
21	16.7	3:47	8:27
22	16.7	3:46	8:29
23	16.8	3:44	8:31
24	16.8	3:42	8:33
25	16.9	3:41	8:35
26	17.0	3:39	8:36
27	17.0	3:37	8:38
28	17.1	3:36	8:40
29	17.1	3:34	8:42
30	17.2	3:33	8:43
31	17.2	3:32	8:45

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.35 kWh/m².

For context, solar energy here swings from a low near 0.27 kWh/m² to a high of 5.68 kWh/m² in June across the year — May's 5.35 kWh/m² sits near the top of that range.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	4.8	4.9	4.9	5.0	5.0	5.0	5.1	5.1	5.2	5.2	5.2	5.2	5.3	5.3	5.3	5.3	5.3	5.4	5.4	5.4	5.4	5.5	5.5	5.5	5.5	5.6	5.6	5.6	5.7	5.7	5.7
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.8	Bright
2	4.9	Bright
3	4.9	Bright
4	5.0	Bright
5	5.0	Bright
6	5.0	Bright
7	5.1	Bright
8	5.1	Bright
9	5.2	Bright
10	5.2	Bright
11	5.2	Bright
12	5.2	Bright
13	5.3	Bright
14	5.3	Bright
15	5.3	Bright
16	5.3	Bright
17	5.3	Bright
18	5.4	Bright
19	5.4	Bright
20	5.4	Bright
21	5.4	Bright
22	5.5	Bright
23	5.5	Bright
24	5.5	Bright
25	5.5	Bright
26	5.6	Bright
27	5.6	Bright
28	5.6	Bright
29	5.7	Bright
30	5.7	Bright
31	5.7	Bright

Planning a trip in May

Is May a good time to visit Lerum?

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

4.6

Sightseeing

4th-best month of the year

0.5

Beach & pool

5th-best month of the year

May is a reasonable time to visit Lerum for sightseeing.

What to pack for Lerum in May

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

In May, Lerum sees daytime highs around 16°C and nights near 6°C. Worth packing: a warm layer, rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

Sea temperature near Lerum in May

The nearest coast averages about 11°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 28 km away) is warmest in August at about 18°C and coldest in February near 2°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)	3	2	3	6	11	15	18	18	16	12	8	5
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Cool	Cool	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	3	Bracing
Feb	2	Bracing
Mar	3	Bracing
Apr	6	Bracing
May	11	Bracing
Jun	15	Cool
Jul	18	Cool
Aug	18	Cool
Sep	16	Cool
Oct	12	Bracing
Nov	8	Bracing
Dec	5	Bracing

UV index in Lerum in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Lerum peaks around June 18 at about 5 (moderate) — a little sun protection helps at midday. 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 5 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	0	1	2	3	5	5	5	5	3	1	1	0
Level	Low	Low	Low	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Low	Low	Low

	UV index (midday)	Level
Jan	0	Low
Feb	1	Low
Mar	2	Low
Apr	3	Moderate
May	5	Moderate
Jun	5	Moderate
Jul	5	Moderate
Aug	5	Moderate
Sep	3	Moderate
Oct	1	Low
Nov	1	Low
Dec	0	Low

Location & terrain

Where is Lerum?

Lerum sits at 57.8°N, 12.3°E, 20 m above sea level, in Sweden. The nearest listed city is Partille, 10 km away.

Topography around Lerum

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

Within 3 km, the terrain around Lerum has only modest variations in elevation — a maximum elevation change of 151 m around an average of 64 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 234 m; within 80 km, significant variations in elevation — a maximum elevation change of 375 m.

The land around Lerum is covered by trees (64%) within 3 km, trees (73%) within 16 km, and trees (52%) and water (30%) within 80 km.

3 km

151 m

trees 64%

16 km

234 m

trees 73%

80 km

375 m

trees 52%

treesgrasslandcroplandartificial surfaceswater

← April Lerum year-round climate June →Best places to visit in May

May weather nearby: Partille 10 km · Mölnlycke 15 km · Gothenburg 19 km · Mölndal 20 km · Kungälv 20 km · Majorna 23 km · Alingsås 24 km · Västra Frölunda 24 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

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 Lerum (57.7705°, 12.269°, elevation 20 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).

	Avg high (°C)	Avg low (°C)
1	14	4
2	14	4
3	14	5
4	14	5
5	14	5
6	14	5
7	14	5
8	15	5
9	15	5
10	15	5
11	15	5
12	15	6
13	15	6
14	15	6
15	15	6
16	15	6
17	16	6
18	16	7
19	16	7
20	16	7
21	16	7
22	16	7
23	16	7
24	17	7
25	17	8
26	17	8
27	17	8
28	17	8
29	17	8
30	17	8
31	18	8

	Clearer (%)	Cloudier (%)
1	44	56
2	44	56
3	44	56
4	45	55
5	45	55
6	45	55
7	46	54
8	47	53
9	47	53
10	47	53
11	48	52
12	47	53
13	48	52
14	46	54
15	47	53
16	46	54
17	45	55
18	44	56
19	44	56
20	44	56
21	43	57
22	43	57
23	44	56
24	43	57
25	43	57
26	44	56
27	45	55
28	46	54
29	46	54
30	47	53
31	47	53

	Rain chance (%)
1	35
2	36
3	36
4	36
5	36
6	37
7	37
8	37
9	38
10	38
11	39
12	39
13	40
14	40
15	40
16	41
17	41
18	41
19	40
20	40
21	40
22	40
23	39
24	39
25	39
26	38
27	37
28	37
29	36
30	36
31	36

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	99	1
11	99	1
12	99	1
13	98	2
14	98	2
15	98	2
16	97	3
17	97	3
18	97	3
19	97	3
20	96	4
21	96	4
22	96	4
23	96	4
24	96	4
25	96	4
26	96	4
27	96	4
28	96	4
29	96	4
30	96	4
31	96	4

	Avg high (°C)	Avg low (°C)
1	14	4
2	14	4
3	14	5
4	14	5
5	14	5
6	14	5
7	14	5
8	15	5
9	15	5
10	15	5
11	15	5
12	15	6
13	15	6
14	15	6
15	15	6
16	15	6
17	16	6
18	16	7
19	16	7
20	16	7
21	16	7
22	16	7
23	16	7
24	17	7
25	17	8
26	17	8
27	17	8
28	17	8
29	17	8
30	17	8
31	18	8

	Clearer (%)	Cloudier (%)
1	44	56
2	44	56
3	44	56
4	45	55
5	45	55
6	45	55
7	46	54
8	47	53
9	47	53
10	47	53
11	48	52
12	47	53
13	48	52
14	46	54
15	47	53
16	46	54
17	45	55
18	44	56
19	44	56
20	44	56
21	43	57
22	43	57
23	44	56
24	43	57
25	43	57
26	44	56
27	45	55
28	46	54
29	46	54
30	47	53
31	47	53

	Rain chance (%)
1	35
2	36
3	36
4	36
5	36
6	37
7	37
8	37
9	38
10	38
11	39
12	39
13	40
14	40
15	40
16	41
17	41
18	41
19	40
20	40
21	40
22	40
23	39
24	39
25	39
26	38
27	37
28	37
29	36
30	36
31	36

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	99	1
11	99	1
12	99	1
13	98	2
14	98	2
15	98	2
16	97	3
17	97	3
18	97	3
19	97	3
20	96	4
21	96	4
22	96	4
23	96	4
24	96	4
25	96	4
26	96	4
27	96	4
28	96	4
29	96	4
30	96	4
31	96	4

	Avg high (°C)	Avg low (°C)
1	14	4
2	14	4
3	14	5
4	14	5
5	14	5
6	14	5
7	14	5
8	15	5
9	15	5
10	15	5
11	15	5
12	15	6
13	15	6
14	15	6
15	15	6
16	15	6
17	16	6
18	16	7
19	16	7
20	16	7
21	16	7
22	16	7
23	16	7
24	17	7
25	17	8
26	17	8
27	17	8
28	17	8
29	17	8
30	17	8
31	18	8

	Clearer (%)	Cloudier (%)
1	44	56
2	44	56
3	44	56
4	45	55
5	45	55
6	45	55
7	46	54
8	47	53
9	47	53
10	47	53
11	48	52
12	47	53
13	48	52
14	46	54
15	47	53
16	46	54
17	45	55
18	44	56
19	44	56
20	44	56
21	43	57
22	43	57
23	44	56
24	43	57
25	43	57
26	44	56
27	45	55
28	46	54
29	46	54
30	47	53
31	47	53

	Rain chance (%)
1	35
2	36
3	36
4	36
5	36
6	37
7	37
8	37
9	38
10	38
11	39
12	39
13	40
14	40
15	40
16	41
17	41
18	41
19	40
20	40
21	40
22	40
23	39
24	39
25	39
26	38
27	37
28	37
29	36
30	36
31	36

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	99	1
11	99	1
12	99	1
13	98	2
14	98	2
15	98	2
16	97	3
17	97	3
18	97	3
19	97	3
20	96	4
21	96	4
22	96	4
23	96	4
24	96	4
25	96	4
26	96	4
27	96	4
28	96	4
29	96	4
30	96	4
31	96	4