Izu weather in July

In July, Izu sees average daytime highs of 27°C and overnight lows near 22°C, with 228 mm of rain across 15.2 wet days and about 14.1 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 26°C in the first days to 29°C by the end. The sky is clear or mostly clear about 17% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 14 h 18 min at the start of July to 13 h 48 min by month's end. Set against the rest of the year, July is Izu's 11th-clearest and 7th-windiest month. For the whole year in context, see Izu's year-round climate.

Daytime high
27°
2nd warmest
Overnight low
22°
11th coldest
Rainfall
228 mm
15.2 wet days
Daylight
14 h 06 min
4:46 AM – 6:54 PM
Cloud cover
75%
11th clearest
Wind
10 km/h
7th windiest
Solar energy
5.19 kWh/m²
Travel score
5.3
out of 10

Izu is city in Shizuoka Prefecture, Japan.

Density
84/km²
people per km²
Founded
2004

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 26°C in the first days to 29°C by the end.

A typical July day in Izu reaches about 27°C in the afternoon and slips back to 22°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 31°C. Set against its neighbours, July runs about 4°C warmer than June and about 1°C cooler than August.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12621
22621
32621
42621
52621
62621
72622
82722
92722
102722
112722
122722
132722
142722
152722
162822
172823
182823
192823
202823
212823
222823
232823
242823
252823
262823
272923
282923
292924
302924
312924

How July really feels in Izu

Once humidity and wind are folded in, July averages 2 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
2
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Izu weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 927.91.39.91.9
Feb / 1059.11.410.72.0
Mar12° / 17913.90.811.73.0
Apr17° / 10°17212.5012.94.9
May21° / 15°18812.2013.85.9
Jun24° / 18°24916.2014.35.5
Jul27° / 22°22815.2014.15.3
Aug29° / 24°15614.5013.35.1
Sep26° / 21°23315.1012.25.8
Oct21° / 16°24713.1011.16.0
Nov16° / 11°13410.1010.25.1
Dec11° / 838.20.19.73.2

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% 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 72%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11981
22080
32179
42278
52278
62476
72476
82476
92575
102575
112575
122674
132773
142773
152773
162773
172773
182971
192971
202971
213070
223070
233268
243367
253466
263466
273664
283862
293862
303961
314060

Chance of precipitation in July

Any precipitation

Izu gets around 228 mm of rain over 15.2 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 49% and peaks near 57% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
157
257
356
455
555
654
753
853
952
1051
1150
1249
1349
1448
1547
1647
1746
1846
1946
2046
2146
2246
2346
2446
2545
2645
2745
2845
2945
3044
3144

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 59% of days. Sticky, muggy-or-worse air turns up on roughly 92% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
131646350
231545370
321444400
421342430
521241451
611140471
711038491
81937521
91935532
101834552
111832572
121830583
131729603
140728623
150726634
160625645
170624655
180622666
190521677
200520687
210519688
220518689
2305176810
2404166911
2504156912
2604146814
2704136815
2804136716
2904126717
3003116719
3103116620

Wind in July

Winds average 10 km/h in July.

Across July, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 18 min at the start of July to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over July. Sunrise moves from 4:38 AM to 4:56 AM, and sunset from 6:57 PM to 6:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.34:386:57
214.34:386:57
314.34:396:57
414.34:396:57
514.34:406:57
614.34:406:57
714.34:416:57
814.34:416:57
914.24:426:56
1014.24:426:56
1114.24:436:56
1214.24:436:55
1314.24:446:55
1414.24:446:55
1514.24:456:54
1614.14:466:54
1714.14:466:54
1814.14:476:53
1914.14:486:53
2014.14:486:52
2114.04:496:51
2214.04:506:51
2314.04:506:50
2414.04:516:50
2514.04:526:49
2613.94:536:48
2713.94:536:48
2813.94:546:47
2913.94:556:46
3013.84:556:45
3113.84:566:44

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.19 kWh/m².

For context, solar energy here swings from a low near 2.44 kWh/m² to a high of 5.45 kWh/m² in May across the year — July's 5.19 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.1Bright
125.1Bright
135.1Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.4Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in July

Hazard calendar for Izu

In seasonPeak

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

Izu 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 Izu?

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

5.3
Sightseeing
5th-best month of the year
5.7
Beach & pool
2nd-best month of the year

July is a reasonable time to visit Izu for sightseeing.

What to pack for Izu in July

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

In July, Izu sees daytime highs around 27°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

Sea temperature near Izu in July

The nearest coast averages about 24°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 20 km away) is warmest in August at about 26°C and coldest in February near 16°C.

It's comfortable for a long swim from May 29 to Nov 29 — about 6.1 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan17Cool
Feb16Cool
Mar16Cool
Apr17Cool
May19Cool
Jun21Refreshing
Jul24Warm
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec19Cool

UV index in Izu in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Izu peaks around July 24 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 highExtremeVery highModerateJul 24UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun10Very high
Jul10Extreme
Aug10Extreme
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Izu 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 Izu is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1623 µg/m³Dec 1610 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb20Moderate
Mar20Moderate
Apr23Moderate
May20Moderate
Jun17Moderate
Jul13Moderate
Aug12Good
Sep12Good
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Izu?

Izu sits at 35.0°N, 138.9°E, 55 m above sea level, in Japan. The nearest listed city is Shuzenji, 2.0 km away.

Topography around Izu

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

Within 3 km, the terrain around Izu has significant variations in elevation — a maximum elevation change of 393 m around an average of 153 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,391 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,746 m.

The land around Izu is covered by trees (75%) within 3 km, trees (79%) within 16 km, and water (54%) and trees (37%) within 80 km.

3 km
393 m
16 km
1,391 m
80 km
3,746 m
treesgrasslandcroplandartificial surfaceswater
July weather nearby: Shuzenji 2.0 km · Izunokuni 8.0 km · Itō 12 km · Kamizawa 14 km · Numazu 16 km · Atami 16 km · Mishima 16 km · Fushimi 16 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 Izu (34.9716°, 138.9464°, elevation 55 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).