Niigata weather in July

In July, Niigata sees average daytime highs of 26°C and overnight lows near 23°C, with 226 mm of rain across 15.2 wet days and about 14.4 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 24°C in the first days to 28°C by the end. The sky is clear or mostly clear about 23% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 14 h 36 min at the start of July to 14 hours by month's end. Set against the rest of the year, July is Niigata's 9th-clearest and 12th-windiest month. For the whole year in context, see Niigata's year-round climate.

Daytime high
26°
2nd warmest
Overnight low
23°
11th coldest
Rainfall
226 mm
15.2 wet days
Daylight
14 h 24 min
4:38 AM – 7:01 PM
Cloud cover
69%
9th clearest
Wind
11 km/h
12th windiest
Solar energy
5.11 kWh/m²
Travel score
5.8
out of 10
Air quality
Good
PM2.5 10 µg/m³ · 2010

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 24°C in the first days to 28°C by the end.

A typical July day in Niigata reaches about 26°C in the afternoon and slips back to 23°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 29°C. Set against its neighbours, July runs about 4°C warmer than June and about 2°C cooler than August.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12421
22421
32421
42421
52521
62521
72522
82522
92522
102522
112522
122522
132622
142622
152623
162623
172623
182623
192623
202723
212723
222723
232724
242724
252724
262724
272824
282824
292824
302824
312824

How July really feels in Niigata

Once humidity and wind are folded in, July 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

July sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Niigata weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 17726.510.39.70.3
Feb / 11421.28.810.50.4
Mar / 11018.62.511.71.4
Apr13° / 9012.60.2133.5
May18° / 13°9911.80145.6
Jun22° / 18°12311.2014.66.3
Jul26° / 23°22615.2014.45.8
Aug28° / 24°16012.9013.55.7
Sep25° / 21°14614.2012.35.9
Oct20° / 16°15515.80115.4
Nov14° / 10°16419.70.2103.2
Dec / 19525.44.19.41.2

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 12% of July, with mostly cloudy or overcast conditions the remaining 66%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12971
22872
32872
42872
52872
62971
72971
82971
92971
102971
113070
123070
133070
143169
153268
163367
173367
183367
193565
203565
213664
223862
233961
243961
254060
264159
274258
284357
294456
304654
314654

Chance of precipitation in July

Any precipitation

Niigata gets around 226 mm of rain over 15.2 wet days in July, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 48% and peaks near 55% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
150
251
352
452
553
654
754
854
955
1055
1155
1255
1354
1454
1553
1652
1752
1851
1950
2049
2147
2246
2344
2443
2541
2640
2739
2838
2937
3036
3135

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the oppressive band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 91% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
132253220
222053250
321951271
421750301
511551321
611449342
711348362
811246383
901145413
1001044434
110942444
120841465
130839486
140737497
150735508
160633529
1706325210
1806305212
1905285413
2005265514
2105245516
2204235518
2304215520
2404205422
2504185424
2603175426
2703165229
2803155131
2903145033
3002135134
3102134936

Wind in July

Winds average 11 km/h in July, the calmest month.

Across July, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 36 min at the start of July to 14 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over July. Sunrise moves from 4:29 AM to 4:50 AM, and sunset from 7:05 PM to 6:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.64:297:05
214.64:307:05
314.64:307:05
414.64:317:05
514.64:317:05
614.64:327:05
714.54:327:04
814.54:337:04
914.54:337:04
1014.54:347:04
1114.54:347:03
1214.54:357:03
1314.44:367:02
1414.44:367:02
1514.44:377:02
1614.44:387:01
1714.44:387:01
1814.34:397:00
1914.34:406:59
2014.34:416:59
2114.34:416:58
2214.34:426:58
2314.24:436:57
2414.24:446:56
2514.24:456:55
2614.24:456:55
2714.14:466:54
2814.14:476:53
2914.14:486:52
3014.04:496:51
3114.04:506:50

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.11 kWh/m².

For context, solar energy here swings from a low near 1.62 kWh/m² to a high of 5.68 kWh/m² in May across the year — July's 5.11 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.1Bright
185.1Bright
195.1Bright
205.2Bright
215.2Bright
225.3Bright
235.3Bright
245.3Bright
255.4Bright
265.4Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in July

Hazard calendar for Niigata

In seasonPeak

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

Niigata 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 July a good time to visit Niigata?

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

5.8
Sightseeing
3rd-best month of the year
5.6
Beach & pool
2nd-best month of the year

July is a reasonable time to visit Niigata for sightseeing.

What to pack for Niigata in July

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

In July, Niigata sees daytime highs around 26°C and nights near 23°C. Pack rain gear. Worth having: light clothes and sun protection. About 15 days see rain.

rain gearlight clothessun protection

Sea temperature near Niigata in July

The nearest coast averages about 23°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 16 km away) is warmest in August at about 26°C and coldest in March near 10°C.

It's comfortable for a long swim from Jun 22 to Oct 30 — about 4.3 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb10Bracing
Mar10Bracing
Apr11Bracing
May15Bracing
Jun19Cool
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov18Cool
Dec15Cool

UV index in Niigata in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July 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 Niigata peaks around August 13 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 13UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug9Very high
Sep8Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Niigata in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Niigata is worst in April — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 7 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Niigata's WHO annual average of 10 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1216 µg/m³Oct 127 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar15Moderate
Apr16Moderate
May14Moderate
Jun11Good
Jul9Good
Aug8Good
Sep7Good
Oct7Good
Nov7Good
Dec7Good
Location & terrain

Where is Niigata?

Niigata sits at 37.9°N, 139.0°E, 1 m above sea level, in Japan. The nearest listed city is Kameda-honchō, 8.0 km away.

Topography around Niigata

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

Within 3 km, the terrain around Niigata has only modest variations in elevation — a maximum elevation change of 29 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 42 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,110 m.

The land around Niigata is covered by artificial surfaces (55%) and water (39%) within 3 km, water (52%) and cropland (24%) within 16 km, and water (45%) and trees (44%) within 80 km.

3 km
29 m
16 km
42 m
80 km
2,110 m
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Kameda-honchō 8.0 km · Niitsu-honchō 15 km · Shirone 18 km · Agano 19 km · Suibara 19 km · Maki 24 km · Gosen 24 km · Shibata 26 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 Niigata (37.9226°, 139.0412°, elevation 1 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).