Gilly weather in May

In May, Gilly sees average daytime highs of 17°C and overnight lows near 9°C, with 65 mm of rain across 12.8 wet days and about 15.2 hours of daylight. It is the 5th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 19°C by the end. The sky is clear or mostly clear about 17% 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 Gilly's 5th-clearest and 9th-windiest month. For the whole year in context, see Gilly's year-round climate.

Daytime high
17°
5th warmest
Overnight low
8th coldest
Rainfall
65 mm
12.8 wet days
Daylight
15 h 12 min
5:01 AM – 8:15 PM
Cloud cover
70%
5th clearest
Wind
13 km/h
9th windiest
Solar energy
5.03 kWh/m²
Travel score
5.1
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 16°C in the first days to 19°C by the end.

A typical May day in Gilly reaches about 17°C in the afternoon and slips back to 9°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 24°C. Set against its neighbours, May runs about 4°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
1167
2167
3167
4168
5168
6168
7168
8178
9178
10178
11178
12178
13178
14178
15179
16179
17189
18189
19189
20189
21189
22189
23189
241810
251910
261910
271910
281910
291910
301910
311910

How May really feels in Gilly

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.

Gilly weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6612.71.88.30.1
Feb / 6111.62.69.70.5
Mar10° / 6012.31.211.52.1
Apr14° / 5311.70.113.53.8
May17° / 6512.8015.25.1
Jun20° / 12°6912.1016.15.8
Jul22° / 14°7312.5015.86.3
Aug22° / 13°7612.2014.36.3
Sep19° / 11°5710.7012.45.7
Oct14° / 6111.5010.53.9
Nov / 6411.90.68.81.7
Dec / 7913.51.97.90.4

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 70%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13070
22971
32971
42971
52971
62971
72971
82971
92971
102971
112971
122971
132971
143070
153070
162971
172971
182971
192971
202971
213070
223070
233070
243070
253070
263070
273169
283169
293268
303169
313268

Chance of precipitation in May

Any precipitation

Gilly gets around 65 mm of rain over 12.8 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 42% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
142
242
342
442
542
642
742
842
942
1042
1142
1243
1343
1443
1543
1643
1743
1842
1942
2042
2142
2242
2342
2441
2541
2641
2742
2842
2942
3043
3143

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 90% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19820
29820
39820
49730
59730
69640
79640
89550
99550
109550
119460
129460
139460
149460
159370
169370
179280
189280
199181
209091
2189101
2289101
2387112
2486122
2585132
2683143
2782153
2880164
2979174
3077185
3176195

Wind in May

Winds average 13 km/h in May.

Across May, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

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 5:26 AM to 4:44 AM, and sunset from 7:52 PM to 8:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.45:267:52
214.55:247:54
314.55:237:55
414.65:217:57
514.75:197:59
614.75:178:00
714.85:168:02
814.85:148:03
914.95:128:05
1014.95:118:06
1115.05:098:08
1215.05:078:09
1315.15:068:11
1415.15:048:12
1515.25:038:14
1615.25:018:15
1715.35:008:17
1815.34:598:18
1915.44:578:19
2015.44:568:21
2115.54:558:22
2215.54:548:24
2315.54:528:25
2415.64:518:26
2515.64:508:27
2615.74:498:29
2715.74:488:30
2815.74:478:31
2915.84:468:32
3015.84:458:33
3115.84:448:35

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.03 kWh/m².

For context, solar energy here swings from a low near 0.65 kWh/m² to a high of 5.32 kWh/m² in June across the year — May's 5.03 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.9Bright
124.9Bright
134.9Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.1Bright
195.1Bright
205.1Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in May

Is May a good time to visit Gilly?

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

5.1
Sightseeing
5th-best month of the year
1.4
Beach & pool
5th-best month of the year

May is a reasonable time to visit Gilly for sightseeing.

What to pack for Gilly in May

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

In May, Gilly sees daytime highs around 17°C and nights near 9°C. Worth packing: rain gear and sun protection. About 13 days see rain.

rain gearsun protection

UV index in Gilly 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 Gilly peaks around July 13 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 13UV 7Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun7High
Jul7High
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Gilly 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 Gilly is worst in April — around 18 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (December, 11 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1217 µg/m³Dec 1111 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar17Moderate
Apr18Moderate
May15Moderate
Jun14Moderate
Jul13Moderate
Aug14Moderate
Sep13Moderate
Oct12Good
Nov11Good
Dec11Good
Location & terrain

Where is Gilly?

Gilly sits at 50.4°N, 4.5°E, 152 m above sea level, in Belgium. The nearest listed city is Montignies-sur-Sambre, 2.0 km away.

Topography around Gilly

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

Within 3 km, the terrain around Gilly has only modest variations in elevation — a maximum elevation change of 120 m around an average of 138 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 215 m; within 80 km, large variations in elevation — a maximum elevation change of 716 m.

The land around Gilly is covered by artificial surfaces (49%) and trees (41%) within 3 km, cropland (36%) and trees (33%) within 16 km, and trees (36%), cropland (31%) and grassland (26%) within 80 km.

3 km
120 m
16 km
215 m
80 km
716 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Montignies-sur-Sambre 2.0 km · Charleroi 3.0 km · Châtelineau 3.0 km · Jumet 4.0 km · Châtelet 4.0 km · Marcinelle 4.0 km · Marchienne-au-Pont 6.0 km · Fleurus 8.0 km

Belgium travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 81% of US
price level, 2025
GDP per capita
$60,750
2025
Happiness
6.9 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2021
Road deaths
5.8
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 608
Religion
Roman Catholic 57%nonbeliever/agnostic 20%atheist 9%Muslim 7%

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 Gilly (50.4245°, 4.4789°, elevation 152 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).