Shizukuishi weather in September

In September, Shizukuishi sees average daytime highs of 21°C and overnight lows near 14°C, with 161 mm of rain across 14.5 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 19°C by the end. The sky is clear or mostly clear about 15% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Shizukuishi's 7th-clearest and 9th-windiest month. For the whole year in context, see Shizukuishi's year-round climate.

Daytime high
21°
3rd warmest
Overnight low
14°
10th coldest
Rainfall
161 mm
14.5 wet days
Daylight
12 h 18 min
5:23 AM – 5:38 PM
Cloud cover
73%
7th clearest
Wind
7 km/h
9th windiest
Solar energy
3.49 kWh/m²
Travel score
5.5
out of 10

Shizukuishi is town in Iwate district, Iwate prefecture, Japan.

Density
27/km²
people per km²
Founded
1955

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 19°C by the end.

A typical September day in Shizukuishi reaches about 21°C in the afternoon and slips back to 14°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 25°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12417
22417
32417
42417
52317
62316
72316
82316
92316
102316
112215
122215
132215
142215
152214
162114
172114
182114
192113
202013
212013
222012
232012
242012
251912
261911
271911
281911
291911
301810

How September really feels in Shizukuishi

Once humidity and wind are folded in, September 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

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

Shizukuishi weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -8°8314.518.39.50.0
Feb / -8°7713.515.210.40.0
Mar / -4°11316.11411.70.1
Apr11° / 108154.5132.2
May17° / 11413.90.214.24.8
Jun20° / 13°12113.4014.85.5
Jul24° / 17°18117.3014.55.5
Aug25° / 19°16416013.65.7
Sep21° / 14°16114.5012.35.5
Oct15° / 13513.40.210.94.2
Nov / 10815.159.81.3
Dec / -6°10516169.20.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 71%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12674
22575
32575
42575
52575
62575
72674
82872
92872
102872
112872
122872
132872
142971
152971
163070
173070
183070
193070
203169
213070
223070
233169
243169
253268
263268
273367
283367
293367
303466

Chance of precipitation in September

Any precipitation

Shizukuishi gets around 161 mm of rain over 14.5 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 50% and peaks near 53% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
153
253
353
453
553
653
753
853
953
1053
1153
1252
1352
1452
1551
1651
1750
1849
1948
2048
2147
2247
2346
2446
2546
2646
2746
2846
2946
3046

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
172035326
282135315
382236295
492336284
5102436274
6112436254
7122536243
8132635223
9152635213
10172734203
11192733182
12212832172
13242830162
14272929151
15292927131
16322925121
17362924111
18392922101
1942292091
2045291881
2147291770
2250291560
2353281450
2456281240
2559271130
2661271020
276326920
286625810
296824710
306923710

Wind in September

Winds average 7 km/h in September.

Across September, 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.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 5:08 AM to 5:36 AM, and sunset from 6:03 PM to 5:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:086:03
212.95:096:02
312.85:106:00
412.85:115:58
512.75:125:57
612.75:135:55
712.75:145:53
812.65:155:52
912.65:165:50
1012.55:175:48
1112.55:185:47
1212.45:195:45
1312.45:205:43
1412.35:215:41
1512.35:225:40
1612.35:235:38
1712.25:245:36
1812.25:255:35
1912.15:265:33
2012.15:275:31
2112.05:285:30
2212.05:295:28
2311.95:295:26
2411.95:305:24
2511.95:315:23
2611.85:325:21
2711.85:335:19
2811.75:345:18
2911.75:355:16
3011.65:365:14

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.49 kWh/m².

For context, solar energy here swings from a low near 1.81 kWh/m² to a high of 5.13 kWh/m² in May across the year — September's 3.49 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.7Moderate
33.7Moderate
43.7Moderate
53.7Moderate
63.6Moderate
73.6Moderate
83.6Moderate
93.6Moderate
103.5Moderate
113.5Moderate
123.5Moderate
133.5Moderate
143.5Moderate
153.5Moderate
163.4Moderate
173.4Moderate
183.4Moderate
193.4Moderate
203.4Moderate
213.4Moderate
223.4Moderate
233.4Moderate
243.3Moderate
253.3Moderate
263.3Moderate
273.3Moderate
283.3Moderate
293.2Moderate
303.2Moderate
Planning a trip in September

Is September a good time to visit Shizukuishi?

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

5.5
Sightseeing
2nd-best month of the year
3.5
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Shizukuishi for sightseeing.

What to pack for Shizukuishi in September

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

In September, Shizukuishi sees daytime highs around 21°C and nights near 14°C. Pack rain gear. About 15 days see rain.

rain gear

UV index in Shizukuishi in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Shizukuishi peaks around August 18 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 highHighVery highHighModerateLowAug 18UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul6High
Aug9Very high
Sep7High
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in Shizukuishi in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Shizukuishi is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1420 µg/m³Dec 1610 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar19Moderate
Apr20Moderate
May19Moderate
Jun14Moderate
Jul12Moderate
Aug11Good
Sep11Good
Oct12Good
Nov11Good
Dec9Good
Location & terrain

Where is Shizukuishi?

Shizukuishi sits at 39.7°N, 141.0°E, 192 m above sea level, in Japan. The nearest listed city is Morioka, 14 km away.

Topography around Shizukuishi

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

Within 3 km, the terrain around Shizukuishi has only modest variations in elevation — a maximum elevation change of 167 m around an average of 207 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,544 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,986 m.

The land around Shizukuishi is covered by cropland (39%) and trees (37%) within 3 km, trees (75%) within 16 km, and trees (87%) within 80 km.

3 km
167 m
16 km
1,544 m
80 km
1,986 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Morioka 14 km · Yahaba 17 km · Takizawa 18 km · Semboku 20 km · Hizume 22 km · Hachimantai 26 km · Hanamaki 36 km · Kitakami 47 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 Shizukuishi (39.6941°, 140.9844°, elevation 192 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).