Sassenheim weather in May

In May, Sassenheim sees average daytime highs of 15°C and overnight lows near 10°C, with 59 mm of rain across 10.4 wet days and about 15.4 hours of daylight. It is the 5th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 14°C in the first days to 16°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 14 h 36 min at the start of May to 16 h 06 min by month's end. Set against the rest of the year, May is Sassenheim's 3rd-clearest and 8th-windiest month. For the whole year in context, see Sassenheim's year-round climate.

Daytime high
15°
5th warmest
Overnight low
10°
7th coldest
Rainfall
59 mm
10.4 wet days
Daylight
15 h 30 min
4:54 AM – 8:22 PM
Cloud cover
61%
3rd clearest
Wind
18 km/h
8th windiest
Solar energy
5.44 kWh/m²
Travel score
4.5
out of 10

Sassenheim is town and former municipality in the western Netherlands.

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 16°C by the end.

A typical May day in Sassenheim reaches about 15°C in the afternoon and slips back to 10°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 20°C. Set against its neighbours, May runs about 3°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
1148
2148
3149
4149
5149
6149
7149
8149
9149
10159
11159
12159
131510
141510
151510
161510
171510
181510
191510
201510
211610
221611
231611
241611
251611
261611
271611
281611
291611
301711
311712

How May really feels in Sassenheim

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
0
heat index over the day's high
Days feeling ≤ C
0
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.

Sassenheim 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.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 7213.60.980.4
Feb / 5611.51.49.50.5
Mar / 5411.30.411.51.5
Apr12° / 4510.1013.63.0
May15° / 10°5910.4015.44.5
Jun18° / 13°6111016.45.5
Jul20° / 15°7712.40166.0
Aug20° / 15°9013.3014.55.9
Sep18° / 13°8713012.45.2
Oct14° / 10°9314010.33.6
Nov10° / 8315.30.38.51.9
Dec / 8414.60.87.60.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24258
34258
44357
54357
64456
74555
84555
94555
104555
114456
124456
134555
144555
154555
164456
174456
184357
194258
204258
214258
224159
234258
244258
254258
264159
274159
284159
294159
304060
314060

Chance of precipitation in May

Any precipitation

Sassenheim gets around 59 mm of rain over 10.4 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 34% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
336
436
535
635
734
834
934
1033
1133
1233
1333
1433
1533
1632
1732
1832
1933
2033
2133
2234
2334
2434
2534
2635
2735
2835
2936
3037
3137

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 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
110000
29910
39910
49910
59910
69910
79820
89820
99820
109820
119730
129730
139730
149730
159640
169640
179550
189550
199460
209460
219370
229280
239091
2489101
2588111
2687121
2785141
2884151
2983161
3080182
3179192

Wind in May

Winds average 18 km/h in May.

Across May, daily wind ranges from about 17 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 36 min at the start of May to 16 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 90 minutes over May. Sunrise moves from 5:21 AM to 4:36 AM, and sunset from 7:57 PM to 8:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.65:217:57
214.75:197:59
314.75:178:01
414.85:158:02
514.85:138:04
614.95:118:06
715.05:108:07
815.05:088:09
915.15:068:11
1015.15:048:12
1115.25:038:14
1215.25:018:16
1315.34:598:17
1415.44:588:19
1515.44:568:20
1615.54:548:22
1715.54:538:23
1815.64:518:25
1915.64:508:27
2015.74:498:28
2115.74:478:29
2215.84:468:31
2315.84:458:32
2415.84:438:34
2515.94:428:35
2615.94:418:37
2716.04:408:38
2816.04:398:39
2916.04:388:40
3016.14:378:42
3116.14:368:43

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.44 kWh/m².

For context, solar energy here swings from a low near 0.58 kWh/m² to a high of 5.68 kWh/m² in June across the year — May's 5.44 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.2Bright
55.2Bright
65.2Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
315.6Bright
Planning a trip in May

Is May a good time to visit Sassenheim?

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

4.5
Sightseeing
5th-best month of the year
0.3
Beach & pool
5th-best month of the year

May is a reasonable time to visit Sassenheim for sightseeing.

What to pack for Sassenheim in May

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

In May, Sassenheim sees daytime highs around 15°C and nights near 10°C. Worth packing: a warm layer, rain gear and sun protection. About 10 days see rain.

a warm layerrain gearsun protection

Sea temperature near Sassenheim in May

The nearest coast averages about 12°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 15 km away) is warmest in August at about 19°C and coldest in February near 5°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan6Bracing
Feb5Bracing
Mar6Bracing
Apr9Bracing
May12Bracing
Jun15Bracing
Jul18Cool
Aug19Cool
Sep18Cool
Oct15Bracing
Nov11Bracing
Dec8Bracing

UV index in Sassenheim 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 Sassenheim peaks around June 23 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 23UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr3Moderate
May5Moderate
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Sassenheim?

Sassenheim sits at 52.2°N, 4.5°E, 4 m above sea level, in The Netherlands. The nearest listed city is Lisse, 5.0 km away.

Topography around Sassenheim

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

Within 3 km, the terrain around Sassenheim has only modest variations in elevation — a maximum elevation change of 26 m around an average of 0 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 47 m; within 80 km, only modest variations in elevation — a maximum elevation change of 99 m.

The land around Sassenheim is covered by grassland (36%) and artificial surfaces (24%) within 3 km, grassland (32%) and water (27%) within 16 km, and water (35%) and grassland (28%) within 80 km.

3 km
26 m
16 km
47 m
80 km
99 m
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Lisse 5.0 km · Noordwijk-Binnen 5.0 km · Merenwijk 5.0 km · Oegstgeest 6.0 km · Leiderdorp 7.0 km · Leiden 8.0 km · Hillegom 8.0 km · Nieuw-Vennep 9.0 km

The Netherlands travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 84% of US
price level, 2025
GDP per capita
$73,684
2025
Happiness
7.2 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
4
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 624
Religion
none 54%Roman Catholic 20%Protestant 15%other 6%

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 Sassenheim (52.225°, 4.5222°, elevation 4 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).