Slaný weather in May

In May, Slaný sees average daytime highs of 19°C and overnight lows near 9°C, with 59 mm of rain across 11.9 wet days and about 15.2 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 17°C in the first days to 20°C by the end. The sky is clear or mostly clear about 22% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 24 min at the start of May to 15 h 48 min by month's end. Set against the rest of the year, May is Slaný's 6th-clearest and 8th-windiest month. For the whole year in context, see Slaný's year-round climate.

Daytime high
19°
5th warmest
Overnight low
8th coldest
Rainfall
59 mm
11.9 wet days
Daylight
15 h 12 min
4:24 AM – 7:36 PM
Cloud cover
65%
6th clearest
Wind
10 km/h
8th windiest
Solar energy
5.2 kWh/m²
Travel score
5.7
out of 10

Slaný is town in the Czech Republic.

Density
429/km²
people per km²
Founded
1239

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 17°C in the first days to 20°C by the end.

A typical May day in Slaný reaches about 19°C in the afternoon and slips back to 9°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 25°C. Set against its neighbours, May runs about 5°C warmer than April and about 3°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1177
2177
3187
4187
5187
6188
7188
8188
9188
10188
11188
12188
13188
14188
15198
16199
17199
18199
19199
20199
21199
22199
23209
242010
252010
262010
272010
282010
292010
302110
312111

How May really feels in Slaný

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.

Slaný weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°329.14.38.30.0
Feb / -2°267.53.19.70.1
Mar / 389.82.311.51.6
Apr14° / 358.80.413.54.2
May19° / 5911.9015.25.7
Jun22° / 12°7011.8016.16.3
Jul25° / 14°7612015.76.6
Aug24° / 14°6710.5014.36.8
Sep19° / 10°509012.46.1
Oct13° / 429.20.110.53.6
Nov / 388.31.28.80.9
Dec / -1°378.83.97.90.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13763
23763
33664
43664
53763
63763
73763
83763
93862
103763
113763
123763
133763
143862
153862
163862
173862
183862
193862
203763
213763
223763
233763
243763
253763
263763
273763
283961
293961
303961
314060

Chance of precipitation in May

Any precipitation

Slaný gets around 59 mm of rain over 11.9 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 38% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
236
336
437
537
637
738
838
938
1038
1138
1237
1337
1437
1537
1637
1737
1837
1937
2037
2138
2238
2338
2438
2539
2639
2739
2840
2940
3041
3141

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 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19910
29910
39910
49910
59910
69910
79820
89820
99820
109820
119820
129820
139730
149730
159730
169730
179640
189640
199550
209550
219460
229370
239280
249190
2590100
2689110
2787121
2886131
2985141
3084151
3182162

Wind in May

Winds average 10 km/h in May.

Across May, daily wind ranges from about 10 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
110calm
210calm
310calm
410calm
510calm
610calm
710calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 24 min at the start of May to 15 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over May. Sunrise moves from 4:48 AM to 4:07 AM, and sunset from 7:13 PM to 7:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.44:487:13
214.54:477:15
314.54:457:16
414.64:437:18
514.64:417:20
614.74:407:21
714.74:387:23
814.84:367:24
914.94:347:26
1014.94:337:27
1115.04:317:29
1215.04:307:30
1315.14:287:32
1415.14:277:33
1515.24:257:35
1615.24:247:36
1715.34:227:37
1815.34:217:39
1915.34:207:40
2015.44:187:42
2115.44:177:43
2215.54:167:44
2315.54:157:46
2415.64:147:47
2515.64:137:48
2615.64:117:49
2715.74:107:51
2815.74:097:52
2915.74:097:53
3015.84:087:54
3115.84:077:55

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.2 kWh/m².

For context, solar energy here swings from a low near 0.73 kWh/m² to a high of 5.45 kWh/m² in June across the year — May's 5.2 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
14.9Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.4Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
315.4Bright
Planning a trip in May

Is May a good time to visit Slaný?

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

5.7
Sightseeing
5th-best month of the year
2.4
Beach & pool
5th-best month of the year

May is a reasonable time to visit Slaný for sightseeing.

What to pack for Slaný in May

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

In May, Slaný sees daytime highs around 19°C and nights near 9°C. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

UV index in Slaný in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Slaný peaks around June 21 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 21UV 7Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr4Moderate
May6High
Jun7High
Jul7High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Slaný in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Slaný is worst in April — around 22 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1022 µg/m³Dec 1515 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb18Moderate
Mar21Moderate
Apr22Moderate
May19Moderate
Jun21Moderate
Jul18Moderate
Aug19Moderate
Sep19Moderate
Oct17Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Slaný?

Slaný sits at 50.2°N, 14.1°E, 282 m above sea level, in Czechia. The nearest listed city is Kladno, 9.0 km away.

Topography around Slaný

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

Within 3 km, the terrain around Slaný has only modest variations in elevation — a maximum elevation change of 104 m around an average of 289 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 341 m; within 80 km, large variations in elevation — a maximum elevation change of 1,076 m.

The land around Slaný is covered by cropland (55%) within 3 km, cropland (63%) and trees (23%) within 16 km, and trees (45%) and cropland (35%) within 80 km.

3 km
104 m
16 km
341 m
80 km
1,076 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Kladno 9.0 km · Kralupy nad Vltavou 16 km · Řepy 23 km · Louny 25 km · Bohnice 26 km · Stodůlky 26 km · Dejvice 26 km · Košíře 27 km

Czechia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 59% of US
price level, 2025
GDP per capita
$35,917
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
0.8
per 100k, 2023
Road deaths
5.9
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 582
Religion
none 48%believers unaffiliated with a religious society 9%Roman Catholic 7%other believers belonging to a church or religious society 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 Slaný (50.2305°, 14.0869°, elevation 282 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).