Yahaba weather in September

In September, Yahaba sees average daytime highs of 22°C and overnight lows near 14°C, with 141 mm of rain across 13 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 2nd-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 17% 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 Yahaba's 9th-clearest and 10th-windiest month. For the whole year in context, see Yahaba's year-round climate.

Daytime high
22°
3rd warmest
Overnight low
14°
10th coldest
Rainfall
141 mm
13 wet days
Daylight
12 h 18 min
5:22 AM – 5:37 PM
Cloud cover
72%
9th clearest
Wind
7 km/h
10th windiest
Solar energy
3.47 kWh/m²
Travel score
5.8
out of 10

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 Yahaba reaches about 22°C in the afternoon and slips back to 14°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 26°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
52417
62417
72416
82316
92316
102316
112316
122315
132215
142215
152215
162214
172214
182114
192113
202113
212113
222113
232012
242012
252012
262012
271911
281911
291911
301911

How September really feels in Yahaba

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.

Yahaba weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-0° / -9°6512.114.79.50.0
Feb / -8°5911.212.210.40.0
Mar / -4°9514.511.611.70.3
Apr12° / 9813.93.4132.8
May17° / 103130.114.15.1
Jun21° / 13°11312.7014.75.7
Jul24° / 18°15916.1014.55.6
Aug26° / 19°13814.8013.65.8
Sep22° / 14°14113012.35.8
Oct16° / 11311.30.110.94.7
Nov / 7912.93.39.81.7
Dec / -5°7813.912.69.30.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12971
22971
33070
43070
53169
63169
73169
83169
93169
103268
113367
123367
133268
143268
153268
163367
173367
183367
193367
203466
213466
223466
233466
243466
253565
263565
273565
283565
293565
303664

Chance of precipitation in September

Any precipitation

Yahaba gets around 141 mm of rain over 13 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 44% and peaks near 49% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
148
248
349
449
549
649
749
848
948
1048
1148
1248
1347
1447
1546
1645
1744
1844
1943
2042
2141
2241
2340
2440
2539
2639
2739
2839
2938
3038

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 18% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
181934336
282034326
382135315
492135305
5102235295
6102335274
7122435264
8132434254
9142534233
10162633223
11182633213
12202732192
13222830182
14252829162
15272927151
16302926141
17332924131
18362922111
19392921101
2042291991
2145291781
2248291571
2350291461
2453281351
2557281140
2659271040
276226930
286525820
296724720
306823720

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
288calm
298calm
308calm

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
212.95:096:01
312.85:105:59
412.85:115:58
512.75:125:56
612.75:135:54
712.75:135:53
812.65:145:51
912.65:155:49
1012.55:165:48
1112.55:175:46
1212.45:185:44
1312.45:195:43
1412.35:205:41
1512.35:215:39
1612.35:225:37
1712.25:235:36
1812.25:245:34
1912.15:255:32
2012.15:265:31
2112.05:275:29
2212.05:285:27
2311.95:295:25
2411.95:305:24
2511.95:315:22
2611.85:325:20
2711.85:335:19
2811.75:345:17
2911.75:355:15
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 3.47 kWh/m².

For context, solar energy here swings from a low near 1.93 kWh/m² to a high of 5.17 kWh/m² in May across the year — September's 3.47 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.7Moderate
33.7Moderate
43.6Moderate
53.6Moderate
63.6Moderate
73.6Moderate
83.5Moderate
93.5Moderate
103.5Moderate
113.5Moderate
123.5Moderate
133.5Moderate
143.5Moderate
153.4Moderate
163.4Moderate
173.4Moderate
183.4Moderate
193.4Moderate
203.4Moderate
213.4Moderate
223.4Moderate
233.3Moderate
243.3Moderate
253.3Moderate
263.3Moderate
273.3Moderate
283.3Moderate
293.3Moderate
303.2Moderate
Planning a trip in September

Is September a good time to visit Yahaba?

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

5.8
Sightseeing
1st-best month of the year
3.9
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Yahaba for sightseeing.

What to pack for Yahaba in September

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

In September, Yahaba sees daytime highs around 22°C and nights near 14°C. Worth packing: rain gear. About 13 days see rain.

rain gear

UV index in Yahaba 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 Yahaba peaks around August 19 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highHighModerateLowAug 19UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul6High
Aug9Very high
Sep7Very high
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in Yahaba 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 Yahaba 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 Yahaba?

Yahaba sits at 39.6°N, 141.1°E, 131 m above sea level, in Japan. The nearest listed city is Hizume, 7.0 km away.

Topography around Yahaba

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

Within 3 km, the terrain around Yahaba has only modest variations in elevation — a maximum elevation change of 63 m around an average of 117 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 858 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,987 m.

The land around Yahaba is covered by cropland (64%) and artificial surfaces (25%) within 3 km, trees (67%) within 16 km, and trees (86%) within 80 km.

3 km
63 m
16 km
858 m
80 km
1,987 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Hizume 7.0 km · Morioka 10 km · Shizukuishi 17 km · Takizawa 21 km · Hanamaki 25 km · Hachimantai 32 km · Semboku 36 km · Kitakami 37 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 Yahaba (39.6111°, 141.1474°, elevation 131 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).