Gero weather in May

In May, Gero sees average daytime highs of 19°C and overnight lows near 10°C, with 204 mm of rain across 13.8 wet days and about 13.9 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 21°C by the end. The sky is clear or mostly clear about 25% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of May to 14 h 12 min by month's end. Set against the rest of the year, May is Gero's 10th-clearest and 6th-windiest month. For the whole year in context, see Gero's year-round climate.

Daytime high
19°
5th warmest
Overnight low
10°
8th coldest
Rainfall
204 mm
13.8 wet days
Daylight
13 h 54 min
4:51 AM – 6:44 PM
Cloud cover
66%
10th clearest
Wind
7 km/h
6th windiest
Solar energy
5.43 kWh/m²
Travel score
5.6
out of 10

Gero is city in Gifu prefecture, Japan.

Density
41/km²
people per km²
Founded
2004

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 18°C in the first days to 21°C by the end.

A typical May day in Gero reaches about 19°C in the afternoon and slips back to 10°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 23°C. Set against its neighbours, May runs about 5°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
1177
2188
3188
4188
5188
6188
7189
8189
9199
10199
11199
12199
13199
141910
151910
161910
172010
182010
192010
202010
212011
222011
232011
242011
252111
262111
272112
282112
292112
302112
312112

How May really feels in Gero

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.

Gero weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°9712.911.79.80.0
Feb / -4°101118.110.60.1
Mar / -1°17313.45.511.71.5
Apr15° / 19013.3112.94.0
May19° / 10°20413.8013.95.6
Jun23° / 15°26917.2014.45.2
Jul26° / 19°34921014.24.8
Aug27° / 20°20418.4013.45.2
Sep24° / 16°24814.8012.25.9
Oct18° / 10°19812.4011.15.6
Nov12° / 134111.110.13.2
Dec / -2°10613.58.29.60.5

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% 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 62%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24258
34159
44159
54159
64060
74060
84060
93961
103961
113961
123763
133763
143862
153862
163961
173862
183862
193862
203862
213862
223763
233763
243664
253664
263664
273664
283565
293565
303466
313466

Chance of precipitation in May

Any precipitation

Gero gets around 204 mm of rain over 13.8 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 44% and peaks near 45% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
143
243
343
443
543
643
743
844
944
1044
1145
1245
1345
1445
1545
1645
1745
1845
1945
2044
2144
2244
2344
2444
2543
2643
2743
2843
2943
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 88% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19541
29451
39451
49361
59361
69271
79271
89271
99181
109181
119181
129181
139181
149181
159091
169091
179091
188992
1988102
2088102
2187112
2286122
2385132
2484142
2583152
2682162
2781172
2879192
2977212
3075223
3173243

Wind in May

Winds average 7 km/h in May.

Across May, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 24 min at the start of May to 14 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over May. Sunrise moves from 5:05 AM to 4:42 AM, and sunset from 6:31 PM to 6:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:056:31
213.55:046:32
313.55:036:33
413.55:026:34
513.65:016:35
613.65:006:36
713.64:596:36
813.74:586:37
913.74:576:38
1013.74:566:39
1113.74:556:40
1213.84:546:41
1313.84:536:41
1413.84:526:42
1513.94:526:43
1613.94:516:44
1713.94:506:45
1813.94:496:46
1914.04:486:46
2014.04:486:47
2114.04:476:48
2214.04:466:49
2314.14:466:49
2414.14:456:50
2514.14:456:51
2614.14:446:52
2714.14:446:52
2814.24:436:53
2914.24:436:54
3014.24:426:55
3114.24:426:55

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.43 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.31 kWh/m² to a high of 5.43 kWh/m² in May across the year — May's 5.43 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in May

Is May a good time to visit Gero?

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

5.6
Sightseeing
2nd-best month of the year
2.6
Beach & pool
5th-best month of the year

May is a reasonable time to visit Gero for sightseeing.

What to pack for Gero in May

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

In May, Gero sees daytime highs around 19°C and nights near 10°C. Worth packing: rain gear and sun protection. About 14 days see rain.

rain gearsun protection

UV index in Gero in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Gero peaks around July 14 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highModerateJul 14UV 10Jan 1UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Gero 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 Gero is worst in April — around 19 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1719 µg/m³Dec 1510 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar18Moderate
Apr19Moderate
May18Moderate
Jun16Moderate
Jul13Moderate
Aug12Good
Sep11Good
Oct11Good
Nov10Good
Dec10Good
Location & terrain

Where is Gero?

Gero sits at 35.8°N, 137.2°E, 781 m above sea level, in Japan. The nearest listed city is Gujō, 26 km away.

Topography around Gero

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

Within 3 km, the terrain around Gero has large variations in elevation — a maximum elevation change of 771 m around an average of 639 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,745 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,123 m.

The land around Gero is covered by trees (90%) within 3 km, trees (96%) within 16 km, and trees (87%) within 80 km.

3 km
771 m
16 km
1,745 m
80 km
3,123 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Gujō 26 km · Takayama 37 km · Minokamo 40 km · Mino 41 km · Ena 42 km · Nakatsugawa 43 km · Mitake 44 km · Sekimachi 45 km

Japan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
100 V · 50 / 60 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$35,951
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.2
per 100k, 2023
Road deaths
3.6
per 100k/yr, 2019
Income group
High
World Bank
English
Very low
EF EPI 446
Religion
Shintoism 49%Buddhism 46%other 4%Christianity 1%

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 Gero (35.8°, 137.2333°, elevation 781 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).