Senec weather in May

In May, Senec sees average daytime highs of 21°C and overnight lows near 11°C, with 67 mm of rain across 10.7 wet days and about 14.9 hours of daylight. It is the 5th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 20°C in the first days to 23°C by the end. The sky is clear or mostly clear about 28% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 12 min at the start of May to 15 h 30 min by month's end. Set against the rest of the year, May is Senec's 6th-clearest and 5th-windiest month. For the whole year in context, see Senec's year-round climate.

Daytime high
21°
5th warmest
Overnight low
11°
8th coldest
Rainfall
67 mm
10.7 wet days
Daylight
15 hours
4:17 AM – 7:16 PM
Cloud cover
59%
6th clearest
Wind
12 km/h
5th windiest
Solar energy
5.49 kWh/m²
Travel score
6.4
out of 10

Senec is town in Slovakia.

Density
520/km²
people per km²
Founded
1251

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 20°C in the first days to 23°C by the end.

A typical May day in Senec reaches about 21°C in the afternoon and slips back to 11°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 27°C. Set against its neighbours, May runs about 5°C warmer than April and about 4°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1209
2209
3209
42010
52010
62010
72110
82110
92110
102110
112110
122110
132110
142111
152111
162111
172111
182111
192111
202211
212211
222211
232212
242212
252212
262212
272212
282312
292312
302313
312313

How May really feels in Senec

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.

Senec weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°3683.98.60.0
Feb / -1°337.93.29.90.3
Mar11° / 408.41.611.62.6
Apr17° / 4280.313.45.4
May21° / 11°6710.7014.96.4
Jun25° / 14°7210.8015.86.7
Jul27° / 16°7411015.56.4
Aug27° / 16°649.4014.16.7
Sep22° / 12°648.6012.46.8
Oct15° / 488.60.110.64.8
Nov / 478.81.691.7
Dec / -1°418.72.98.20.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 21% of May, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25149
35050
45050
55050
65050
74951
84951
94951
104951
114951
124951
134852
144951
154951
164951
174951
184951
194951
204951
214951
224951
234951
244951
254852
264951
274951
284951
294753
304852
314852

Chance of precipitation in May

Any precipitation

Senec gets around 67 mm of rain over 10.7 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 38% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
132
233
333
434
534
635
735
835
935
1035
1135
1235
1335
1434
1534
1634
1734
1833
1933
2033
2133
2233
2333
2434
2534
2635
2735
2836
2936
3037
3138

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 85% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19550
29550
39460
49370
59370
69280
79280
89190
99190
109190
1190100
1290100
1390100
1490100
1589110
1689110
1788120
1886131
1985141
2085141
2183152
2282162
2380173
2479183
2577194
2675205
2773216
2871236
2968248
3066259
31642610

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 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012calm
3112calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 12 min at the start of May to 15 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 78 minutes over May. Sunrise moves from 4:40 AM to 4:02 AM, and sunset from 6:55 PM to 7:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.24:406:55
214.34:396:56
314.34:376:58
414.44:356:59
514.54:347:01
614.54:327:02
714.64:307:03
814.64:297:05
914.64:277:06
1014.74:267:08
1114.74:247:09
1214.84:237:10
1314.84:227:12
1414.94:207:13
1514.94:197:14
1615.04:177:16
1715.04:167:17
1815.14:157:18
1915.14:147:20
2015.14:137:21
2115.24:117:22
2215.24:107:23
2315.34:097:25
2415.34:087:26
2515.34:077:27
2615.44:067:28
2715.44:057:29
2815.44:047:30
2915.54:047:32
3015.54:037:33
3115.54:027:34

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.49 kWh/m².

For context, solar energy here swings from a low near 0.87 kWh/m² to a high of 5.87 kWh/m² in June across the year — May's 5.49 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in May

Is May a good time to visit Senec?

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

6.4
Sightseeing
4th-best month of the year
4.1
Beach & pool
5th-best month of the year

May is a reasonable time to visit Senec for sightseeing.

What to pack for Senec in May

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

In May, Senec sees daytime highs around 21°C and nights near 11°C. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

UV index in Senec 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 Senec peaks around July 11 at about 8 (very 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 11UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr6High
May6High
Jun7Very high
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Senec 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 Senec is worst in June — around 17 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJun 1516 µg/m³Dec 1411 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar16Moderate
Apr16Moderate
May16Moderate
Jun17Moderate
Jul15Moderate
Aug15Moderate
Sep13Moderate
Oct12Moderate
Nov12Good
Dec11Good
Location & terrain

Where is Senec?

Senec sits at 48.2°N, 17.4°E, 127 m above sea level, in Slovakia. The nearest listed city is Pezinok, 13 km away.

Staré MestoGalanta

Topography around Senec

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

Within 3 km, the terrain around Senec has only modest variations in elevation — a maximum elevation change of 50 m around an average of 129 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 289 m; within 80 km, large variations in elevation — a maximum elevation change of 951 m.

The land around Senec is covered by cropland (56%) and artificial surfaces (20%) within 3 km, cropland (68%) within 16 km, and cropland (57%) and trees (25%) within 80 km.

3 km
50 m
16 km
289 m
80 km
951 m
treesgrasslandcroplandartificial surfaceswaterwetland
May weather nearby: Pezinok 13 km · Vrakuňa 17 km · Podunajské Biskupice 17 km · Trnava 22 km · Petržalka 23 km · Bratislava 23 km · Staré Mesto 24 km · Galanta 24 km

Slovakia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E / F
230 V · 50 Hz
Prices
≈ 58% of US
price level, 2025
GDP per capita
$28,544
2025
Happiness
6.3 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2023
Road deaths
6.1
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 606
Religion
Roman Catholic 56%none 24%Evangelical Church of the Augsburg Confession 5%Greek Catholic 4%

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 Senec (48.2195°, 17.4004°, elevation 127 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).