Tainai weather in April

In April, Tainai sees average daytime highs of 14°C and overnight lows near 5°C, with 134 mm of precipitation across 16.1 wet days and about 13 hours of daylight. It is the 7th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 11°C in the first days to 17°C by the end. The sky is clear or mostly clear about 23% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 30 min by month's end. Set against the rest of the year, April is Tainai's 3rd-clearest and 5th-windiest month. For the whole year in context, see Tainai's year-round climate.

Daytime high
14°
7th warmest
Overnight low
6th coldest
Precipitation
134 mm
16.1 wet days
Daylight
13 hours
5:13 AM – 6:12 PM
Cloud cover
65%
3rd clearest
Wind
9 km/h
5th windiest
Solar energy
5.03 kWh/m²
Travel score
3.5
out of 10

Tainai is city in Niigata Prefecture, Japan.

Density
108/km²
people per km²
Founded
2005

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 11°C in the first days to 17°C by the end.

A typical April day in Tainai reaches about 14°C in the afternoon and slips back to 5°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 20°C. Set against its neighbours, April runs about 7°C warmer than March and about 6°C cooler than May.

10°20°151015202530
Avg high (°C)Avg low (°C)
1102
2112
3112
4113
5113
6123
7123
8123
9134
10134
11134
12134
13144
14145
15145
16145
17155
18155
19156
20156
21166
22166
23166
24167
25177
26177
27177
28178
29178
30188

How April really feels in Tainai

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 4 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
4
wind chill below the day's low

The story in April is cold — wind chill drags the overnight "feels like" below the raw low.

Tainai weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°22126.324.29.70.0
Feb / -2°15822.119.910.50.0
Mar / -0°16521.113.411.70.8
Apr14° / 13416.12.6133.5
May20° / 11°14314.40145.6
Jun24° / 16°18614.8014.65.8
Jul27° / 20°31519.5014.44.8
Aug29° / 21°21517.2013.54.8
Sep25° / 17°16715012.35.7
Oct18° / 11°168160115.0
Nov12° / 18119.339.92.4
Dec / -0°22725.316.89.40.3

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 15% of April, with mostly cloudy or overcast conditions the remaining 62%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13367
23367
33367
43466
53466
63565
73763
83763
93763
103961
113961
123961
133961
143961
153961
163961
174060
183961
193961
204060
214060
224060
234060
244060
254060
264159
274159
284258
294258
304258

Chance of precipitation in April

Any precipitationSnow

Tainai gets around 134 mm of rain and snow over 16.1 wet days in April, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 54% and peaks near 61% on the wettest days, and about 3 days bring snow. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)Snow chance (%)
16124
26022
36021
45920
55918
65917
75816
85815
95714
105713
115612
125511
135510
14549
15548
16538
17537
18526
19525
20525
21514
22513
23513
24513
25512
26502
27502
28502
29501
30491

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
17991
18991
19991
20991
21991
22991
23991
24991
25982
26982
27973
28973
29964
30964

Wind in April

Winds average 9 km/h in April.

Across April, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over April. Sunrise moves from 5:36 AM to 4:54 AM, and sunset from 5:58 PM to 6:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:365:58
212.45:345:59
312.55:336:00
412.55:316:01
512.55:306:02
612.65:286:03
712.65:276:04
812.75:256:05
912.75:246:06
1012.75:226:06
1112.85:216:07
1212.85:196:08
1312.95:186:09
1412.95:166:10
1512.95:156:11
1613.05:136:12
1713.05:126:13
1813.15:106:14
1913.15:096:15
2013.15:076:16
2113.25:066:17
2213.25:056:18
2313.35:036:19
2413.35:026:20
2513.35:006:21
2613.44:596:22
2713.44:586:23
2813.44:576:23
2913.54:556:24
3013.54:546:25

Solar energy in April

Daily solar energy (kWh/m²)

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

For context, solar energy here swings from a low near 1.68 kWh/m² to a high of 5.51 kWh/m² in May across the year — April's 5.03 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.7Bright
34.7Bright
44.7Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in April

Hazard calendar for Tainai

In seasonPeak

In April, Tainai sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Tainai sits in the Pacific typhoon belt; the season peaks July–October.

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is April a good time to visit Tainai?

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

3.5
Sightseeing
7th-best month of the year
0.4
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Tainai.

What to pack for Tainai in April

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

In April, Tainai sees daytime highs around 14°C and nights near 5°C. Pack rain gear. Worth having: a warm layer and sun protection. About 16 days see rain.

rain geara warm layersun protection

Sea temperature near Tainai in April

The nearest coast averages about 11°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 26°C and coldest in March near 9°C.

It's comfortable for a long swim from Jun 21 to Oct 29 — about 4.3 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb10Bracing
Mar9Bracing
Apr11Bracing
May15Bracing
Jun20Cool
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov18Cool
Dec15Bracing

UV index in Tainai in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 Tainai peaks around August 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 12UV 10Dec 22UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug10Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Tainai in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Tainai is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1421 µg/m³Dec 159 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar20Moderate
Apr21Moderate
May19Moderate
Jun15Moderate
Jul14Moderate
Aug12Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Tainai?

Tainai sits at 38.1°N, 139.4°E, 48 m above sea level, in Japan. The nearest listed city is Shibata, 14 km away.

Topography around Tainai

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

Within 3 km, the terrain around Tainai has significant variations in elevation — a maximum elevation change of 325 m around an average of 33 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 938 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,110 m.

The land around Tainai is covered by cropland (46%), trees (26%) and artificial surfaces (24%) within 3 km, trees (41%), water (28%) and cropland (20%) within 16 km, and trees (52%) and water (35%) within 80 km.

3 km
325 m
16 km
938 m
80 km
2,110 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Shibata 14 km · Murakami 20 km · Suibara 29 km · Agano 30 km · Kameda-honchō 34 km · Niigata 36 km · Niitsu-honchō 38 km · Gosen 42 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 Tainai (38.0646°, 139.4056°, elevation 48 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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. 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).