Boo weather in May

In May, Boo sees average daytime highs of 12°C and overnight lows near 6°C, with 39 mm of precipitation across 8.3 wet days and about 16.6 hours of daylight. It is the 5th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 10°C in the first days to 14°C by the end. The sky is clear or mostly clear about 29% of the time in May, and the air most often feels dry.

Daylight stretches from about 15 h 24 min at the start of May to 17 h 36 min by month's end. Set against the rest of the year, May is Boo's 1st-clearest and 9th-windiest month. For the whole year in context, see Boo's year-round climate.

Daytime high: 12°; 5th warmest
Overnight low: 6°; 8th coldest
Precipitation: 39 mm; 8.3 wet days
Daylight: 16 h 36 min; 3:24 AM – 8:03 PM
Cloud cover: 58%; 1st clearest
Wind: 15 km/h; 9th windiest
Solar energy: 5.61 kWh/m²
Travel score: 3.2; out of 10

Boo is urban area in Nacka Municipality, Sweden.

Density: 1,458/km²; people per km²

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

← April Boo 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 10°C in the first days to 14°C by the end.

A typical May day in Boo reaches about 12°C in the afternoon and slips back to 6°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 16°C. Set against its neighbours, May runs about 5°C warmer than April and about 4°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)	9	10	10	10	10	10	10	11	11	11	11	11	11	11	12	12	12	12	12	12	13	13	13	13	13	13	14	14	14	14	14
Avg low (°C)	4	4	4	4	5	5	5	5	5	5	5	6	6	6	6	6	6	7	7	7	7	7	7	8	8	8	8	8	8	9	9

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

How May really feels in Boo

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.

Boo weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	1° / -2°	39	8.8	6.2	6.6	0.0
Feb	1° / -3°	32	8.2	6.6	8.7	0.0
Mar	3° / -1°	30	7.9	4.6	11.3	0.0
Apr	7° / 2°	32	7.5	1.7	14.1	1.0
May	12° / 6°	39	8.3	0.1	16.6	3.2
Jun	16° / 11°	61	10.3	0	18.1	5.0
Jul	19° / 14°	61	10	0	17.5	6.2
Aug	19° / 14°	65	11.5	0	15.3	5.9
Sep	15° / 10°	51	8.7	0	12.6	4.5
Oct	10° / 6°	54	10.5	0.2	9.8	2.0
Nov	5° / 2°	54	11.3	3	7.3	0.2
Dec	2° / -1°	51	11.4	5.5	5.9	0.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in May, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 52%.

	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 (%)	46	46	48	48	48	49	49	49	50	50	50	50	50	50	50	49	49	48	47	47	46	46	46	47	47	46	47	48	47	47	48
Cloudier (%)	54	54	52	52	52	51	51	51	50	50	50	50	50	50	50	51	51	52	53	53	54	54	54	53	53	54	53	52	53	53	52

	Clearer (%)	Cloudier (%)
1	46	54
2	46	54
3	48	52
4	48	52
5	48	52
6	49	51
7	49	51
8	49	51
9	50	50
10	50	50
11	50	50
12	50	50
13	50	50
14	50	50
15	50	50
16	49	51
17	49	51
18	48	52
19	47	53
20	47	53
21	46	54
22	46	54
23	46	54
24	47	53
25	47	53
26	46	54
27	47	53
28	48	52
29	47	53
30	47	53
31	48	52

Chance of precipitation in May

Any precipitation

Boo gets around 39 mm of rain and snow over 8.3 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 26% and peaks near 28% 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 (%)	26	26	26	26	26	26	26	26	25	25	25	25	25	26	26	26	26	27	27	27	27	28	28	28	28	27	27	27	27	27	27

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

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 100% 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	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	99	99	99	99
Comfortable (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1

	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	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	99	1
29	99	1
30	99	1
31	99	1

Wind in May

Winds average 15 km/h in May.

Across May, daily wind ranges from about 15 km/h on the calmest days to 15 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)	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

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

Sunrise & sunset in May

DaylightNight

Daylight runs from about 15 h 24 min at the start of May to 17 h 36 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 4:01 AM to 2:56 AM, and sunset from 7:28 PM to 8:33 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)	15.4	15.5	15.6	15.7	15.8	15.9	15.9	16.0	16.1	16.2	16.3	16.3	16.4	16.5	16.6	16.6	16.7	16.8	16.9	16.9	17.0	17.1	17.1	17.2	17.3	17.3	17.4	17.5	17.5	17.6	17.6
Sunrise (AM)	4:01	3:58	3:55	3:53	3:50	3:48	3:45	3:43	3:40	3:38	3:35	3:33	3:30	3:28	3:26	3:24	3:21	3:19	3:17	3:15	3:13	3:11	3:09	3:07	3:05	3:04	3:02	3:00	2:59	2:57	2:56
Sunset (PM)	7:28	7:30	7:32	7:35	7:37	7:39	7:42	7:44	7:47	7:49	7:51	7:53	7:56	7:58	8:00	8:03	8:05	8:07	8:09	8:11	8:13	8:16	8:18	8:20	8:22	8:24	8:26	8:27	8:29	8:31	8:33

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	15.4	4:01	7:28
2	15.5	3:58	7:30
3	15.6	3:55	7:32
4	15.7	3:53	7:35
5	15.8	3:50	7:37
6	15.9	3:48	7:39
7	15.9	3:45	7:42
8	16.0	3:43	7:44
9	16.1	3:40	7:47
10	16.2	3:38	7:49
11	16.3	3:35	7:51
12	16.3	3:33	7:53
13	16.4	3:30	7:56
14	16.5	3:28	7:58
15	16.6	3:26	8:00
16	16.6	3:24	8:03
17	16.7	3:21	8:05
18	16.8	3:19	8:07
19	16.9	3:17	8:09
20	16.9	3:15	8:11
21	17.0	3:13	8:13
22	17.1	3:11	8:16
23	17.1	3:09	8:18
24	17.2	3:07	8:20
25	17.3	3:05	8:22
26	17.3	3:04	8:24
27	17.4	3:02	8:26
28	17.5	3:00	8:27
29	17.5	2:59	8:29
30	17.6	2:57	8:31
31	17.6	2:56	8:33

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.61 kWh/m².

For context, solar energy here swings from a low near 0.21 kWh/m² to a high of 5.98 kWh/m² in June across the year — May's 5.61 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)	5.0	5.1	5.1	5.2	5.2	5.3	5.3	5.4	5.4	5.5	5.5	5.5	5.6	5.6	5.7	5.7	5.7	5.7	5.8	5.8	5.8	5.8	5.8	5.9	5.9	5.9	5.9	5.9	6.0	6.0	6.0
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	Intense

	Solar energy (kWh/m²)	Level
1	5.0	Bright
2	5.1	Bright
3	5.1	Bright
4	5.2	Bright
5	5.2	Bright
6	5.3	Bright
7	5.3	Bright
8	5.4	Bright
9	5.4	Bright
10	5.5	Bright
11	5.5	Bright
12	5.5	Bright
13	5.6	Bright
14	5.6	Bright
15	5.7	Bright
16	5.7	Bright
17	5.7	Bright
18	5.7	Bright
19	5.8	Bright
20	5.8	Bright
21	5.8	Bright
22	5.8	Bright
23	5.8	Bright
24	5.9	Bright
25	5.9	Bright
26	5.9	Bright
27	5.9	Bright
28	5.9	Bright
29	6.0	Bright
30	6.0	Bright
31	6.0	Intense

Planning a trip in May

Is May a good time to visit Boo?

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

3.2

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 Boo.

What to pack for Boo in May

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

In May, Boo sees daytime highs around 12°C and nights near 6°C. Pack a warm layer. Worth having: rain gear and sun protection. About 8 days see rain.

a warm layerrain gearsun protection

Sea temperature near Boo in May

The nearest coast averages about 7°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 24 km away) is warmest in August at about 17°C and coldest in March 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	2	3	7	12	16	17	14	10	7	5
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	3	Bracing
Feb	2	Bracing
Mar	2	Bracing
Apr	3	Bracing
May	7	Bracing
Jun	12	Bracing
Jul	16	Cool
Aug	17	Cool
Sep	14	Bracing
Oct	10	Bracing
Nov	7	Bracing
Dec	5	Bracing

UV index in Boo 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 Boo peaks around June 17 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	0	1	2	3	4	5	5	4	3	1	0	0
Level	Low	Low	Low	Moderate	Moderate	High	Moderate	Moderate	Moderate	Low	Low	Low

	UV index (midday)	Level
Jan	0	Low
Feb	1	Low
Mar	2	Low
Apr	3	Moderate
May	4	Moderate
Jun	5	High
Jul	5	Moderate
Aug	4	Moderate
Sep	3	Moderate
Oct	1	Low
Nov	0	Low
Dec	0	Low

Location & terrain

Where is Boo?

Boo sits at 59.3°N, 18.3°E, 37 m above sea level, in Sweden. The nearest listed city is Gustavsberg, 6.0 km away.

Topography around Boo

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

Within 3 km, the terrain around Boo has only modest variations in elevation — a maximum elevation change of 73 m around an average of 29 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 100 m; within 80 km, only modest variations in elevation — a maximum elevation change of 109 m.

The land around Boo is covered by trees (68%) within 3 km, trees (54%) and water (30%) within 16 km, and water (46%) and trees (39%) within 80 km.

3 km

73 m

trees 68%

16 km

100 m

trees 54%

80 km

109 m

water 46%

treesgrasslandcroplandartificial surfaceswater

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

May weather nearby: Gustavsberg 6.0 km · Nacka 7.0 km · Lidingö 9.0 km · Östermalm 11 km · Södermalm 12 km · Stockholm 12 km · Kungsholmen 14 km · Årsta 14 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 Boo (59.3333°, 18.2833°, elevation 37 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	9	4
2	10	4
3	10	4
4	10	4
5	10	5
6	10	5
7	10	5
8	11	5
9	11	5
10	11	5
11	11	5
12	11	6
13	11	6
14	11	6
15	12	6
16	12	6
17	12	6
18	12	7
19	12	7
20	12	7
21	13	7
22	13	7
23	13	7
24	13	8
25	13	8
26	13	8
27	14	8
28	14	8
29	14	8
30	14	9
31	14	9

	Clearer (%)	Cloudier (%)
1	46	54
2	46	54
3	48	52
4	48	52
5	48	52
6	49	51
7	49	51
8	49	51
9	50	50
10	50	50
11	50	50
12	50	50
13	50	50
14	50	50
15	50	50
16	49	51
17	49	51
18	48	52
19	47	53
20	47	53
21	46	54
22	46	54
23	46	54
24	47	53
25	47	53
26	46	54
27	47	53
28	48	52
29	47	53
30	47	53
31	48	52

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

	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	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	99	1
29	99	1
30	99	1
31	99	1

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

	Clearer (%)	Cloudier (%)
1	46	54
2	46	54
3	48	52
4	48	52
5	48	52
6	49	51
7	49	51
8	49	51
9	50	50
10	50	50
11	50	50
12	50	50
13	50	50
14	50	50
15	50	50
16	49	51
17	49	51
18	48	52
19	47	53
20	47	53
21	46	54
22	46	54
23	46	54
24	47	53
25	47	53
26	46	54
27	47	53
28	48	52
29	47	53
30	47	53
31	48	52

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

	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	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	99	1
29	99	1
30	99	1
31	99	1

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

	Clearer (%)	Cloudier (%)
1	46	54
2	46	54
3	48	52
4	48	52
5	48	52
6	49	51
7	49	51
8	49	51
9	50	50
10	50	50
11	50	50
12	50	50
13	50	50
14	50	50
15	50	50
16	49	51
17	49	51
18	48	52
19	47	53
20	47	53
21	46	54
22	46	54
23	46	54
24	47	53
25	47	53
26	46	54
27	47	53
28	48	52
29	47	53
30	47	53
31	48	52

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

	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	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	99	1
29	99	1
30	99	1
31	99	1