Arida weather in September

In September, Arida sees average daytime highs of 26°C and overnight lows near 24°C, with 193 mm of rain across 12.3 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 24°C by the end. The sky is clear or mostly clear about 37% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Arida's 7th-clearest and 8th-windiest month. For the whole year in context, see Arida's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
24°
10th coldest
Rainfall
193 mm
12.3 wet days
Daylight
12 h 12 min
5:48 AM – 6:00 PM
Cloud cover
57%
7th clearest
Wind
20 km/h
8th windiest
Solar energy
4.34 kWh/m²
Travel score
6.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 24°C by the end.

A typical September day in Arida reaches about 26°C in the afternoon and slips back to 24°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 27°C. Set against its neighbours, September runs about 2°C cooler than August and about 4°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12725
22725
32725
42725
52725
62725
72725
82725
92625
102624
112624
122624
132624
142624
152624
162624
172624
182623
192523
202523
212523
222523
232523
242523
252522
262522
272422
282422
292422
302422

Arida 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
Jan10° / 98130.4102.3
Feb11° / 10012.20.610.72.5
Mar13° / 14012.9011.73.6
Apr17° / 14°13911012.85.2
May20° / 17°16110.4013.76.1
Jun23° / 21°24813.8014.25.8
Jul26° / 25°19111.80146.3
Aug27° / 26°1038.9013.36.7
Sep26° / 24°19312.3012.26.4
Oct22° / 19°20611.4011.16.6
Nov18° / 15°1129010.25.8
Dec13° / 10°98110.19.83.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15248
25149
35149
45149
55149
65149
75149
85050
95050
105050
115050
125050
135050
144951
155050
164951
174951
184951
194852
204852
214852
224951
234951
245050
255050
265050
275050
285050
295149
305149

Chance of precipitation in September

Any precipitation

Arida gets around 193 mm of rain over 12.3 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 40% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
137
238
339
439
540
640
741
841
941
1041
1141
1241
1340
1440
1539
1639
1739
1839
1939
2039
2140
2240
2340
2441
2541
2641
2742
2842
2943
3043

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 33% of days. Sticky, muggy-or-worse air turns up on roughly 73% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1004194631
2005204630
3005214628
4016224626
5016234624
6017244523
7018254521
8018264420
9029284418
100210294316
110311294215
120312304113
131414313912
141415313811
15151732369
16151932358
17262032337
18272232316
19272432295
20382532284
21392731264
223102831243
234103030223
244113130212
255123329192
265133429182
276143528161
286153628151
296163627141
307173726131

Wind in September

Winds average 20 km/h in September.

Across September, daily wind ranges from about 18 km/h on the calmest days to 21 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1220light breeze
1320light breeze
1420light breeze
1520light breeze
1620breezy
1720breezy
1820breezy
1920breezy
2020breezy
2121breezy
2221breezy
2321breezy
2421breezy
2521breezy
2621breezy
2721breezy
2821breezy
2921breezy
3021breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over September. Sunrise moves from 5:37 AM to 5:58 AM, and sunset from 6:22 PM to 5:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:376:22
212.75:386:20
312.75:386:19
412.65:396:17
512.65:406:16
612.65:406:15
712.55:416:13
812.55:426:12
912.55:436:10
1012.45:436:09
1112.45:446:07
1212.45:456:06
1312.35:456:04
1412.35:466:03
1512.25:476:02
1612.25:486:00
1712.25:485:59
1812.15:495:57
1912.15:505:56
2012.15:505:54
2112.05:515:53
2212.05:525:51
2312.05:535:50
2411.95:535:48
2511.95:545:47
2611.85:555:46
2711.85:565:44
2811.85:565:43
2911.75:575:41
3011.75:585:40

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.34 kWh/m².

For context, solar energy here swings from a low near 2.41 kWh/m² to a high of 5.58 kWh/m² in May across the year — September's 4.34 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.8Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.7Bright
94.6Bright
104.6Bright
114.5Bright
124.5Bright
134.5Bright
144.4Bright
154.4Bright
164.3Bright
174.3Bright
184.3Bright
194.2Bright
204.2Bright
214.2Bright
224.1Bright
234.1Bright
244.1Bright
254.0Bright
264.0Moderate
274.0Moderate
283.9Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Arida

In seasonPeak

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

Arida 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 September a good time to visit Arida?

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

6.4
Sightseeing
3rd-best month of the year
6.0
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Arida for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Arida in September

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

In September, Arida sees daytime highs around 26°C and nights near 24°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Arida in September

The nearest coast averages about 26°C in September — 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 27°C and coldest in February near 14°C.

It's comfortable for a long swim from May 31 to Nov 23 — about 5.8 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb14Bracing
Mar15Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov21Refreshing
Dec18Cool

UV index in Arida in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Arida peaks around June 23 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 highModerateJun 23UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Extreme
Jul10Extreme
Aug7High
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Arida 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 Arida is worst in April — around 19 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1319 µg/m³Dec 1310 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb15Moderate
Mar19Moderate
Apr19Moderate
May17Moderate
Jun14Moderate
Jul10Good
Aug10Good
Sep10Good
Oct10Good
Nov11Good
Dec10Good
Location & terrain

Where is Arida?

Arida sits at 34.1°N, 135.1°E, 0 m above sea level, in Japan. The nearest listed city is Kainan, 12 km away.

Topography around Arida

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

Within 3 km, the terrain around Arida has significant variations in elevation — a maximum elevation change of 345 m around an average of 34 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 629 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,879 m.

The land around Arida is covered by trees (37%), water (37%) and artificial surfaces (22%) within 3 km, water (55%) and trees (35%) within 16 km, and water (45%) and trees (44%) within 80 km.

3 km
345 m
16 km
629 m
80 km
1,879 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Kainan 12 km · Itogawa 14 km · Minato 15 km · Wakayama 18 km · Gobō 23 km · Iwade 26 km · Hannan 31 km · Sennan 33 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 Arida (34.0809°, 135.119°, elevation 0 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).