Mine weather in September

In September, Mine sees average daytime highs of 28°C and overnight lows near 21°C, with 174 mm of rain across 11.8 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 30°C in the first days to 26°C by the end. The sky is clear or mostly clear about 32% 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 Mine's 4th-clearest and 8th-windiest month. For the whole year in context, see Mine's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
174 mm
11.8 wet days
Daylight
12 h 12 min
6:03 AM – 6:16 PM
Cloud cover
60%
4th clearest
Wind
11 km/h
8th windiest
Solar energy
4.31 kWh/m²
Travel score
5.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 30°C in the first days to 26°C by the end.

A typical September day in Mine reaches about 28°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 31°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13023
23023
33023
43023
53023
63022
72922
82922
92922
102922
112922
122922
132921
142821
152821
162821
172821
182820
192820
202720
212720
222720
232719
242719
252719
262619
272619
282618
292618
302618

How September really feels in Mine

Once humidity and wind are folded in, September averages 5 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
5
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Mine 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° / 6810.71.6102.0
Feb11° / 7010.31.310.72.4
Mar14° / 11611.80.311.74.0
Apr19° / 11°12310.3012.86.0
May23° / 15°14010.3013.86.8
Jun26° / 19°23513.8014.25.7
Jul30° / 24°27115.30144.2
Aug32° / 25°16812.7013.33.9
Sep28° / 21°17411.8012.25.7
Oct23° / 15°927.9011.17.2
Nov17° / 10°848.5010.25.7
Dec12° / 7010.50.59.83.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% 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 52%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24357
34357
44555
54555
64654
74654
84654
94852
104852
114852
124852
134951
144852
154852
164852
174852
184852
194951
204852
214951
224951
234951
244951
254951
264951
274951
285050
295149
305149

Chance of precipitation in September

Any precipitation

Mine gets around 174 mm of rain over 11.8 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 39% and peaks near 43% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
143
243
343
443
542
642
742
842
942
1041
1141
1241
1340
1440
1539
1639
1738
1838
1937
2037
2137
2236
2336
2435
2534
2634
2733
2833
2932
3032

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 29% of days. Sticky, muggy-or-worse air turns up on roughly 59% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1011127529
2011228518
3011329497
4021430486
5021531466
6031632455
7031732434
8141833414
9151833403
10161933383
11172033362
12282133342
132102132332
143112232312
154122331292
165132330271
175152430261
186162429241
197172528221
208182527211
219192626191
2210202626181
2310212725161
2411222724151
2512232723140
2613242822130
2715242821110
2816252820100
2917252819100
301926281890

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 5:52 AM to 6:13 AM, and sunset from 6:37 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:526:37
212.75:536:36
312.75:546:35
412.65:556:33
512.65:556:32
612.65:566:30
712.55:576:29
812.55:576:27
912.55:586:26
1012.45:596:25
1112.46:006:23
1212.46:006:22
1312.36:016:20
1412.36:026:19
1512.26:026:17
1612.26:036:16
1712.26:046:14
1812.16:056:13
1912.16:056:11
2012.16:066:10
2112.06:076:08
2212.06:086:07
2312.06:086:06
2411.96:096:04
2511.96:106:03
2611.86:106:01
2711.86:116:00
2811.86:125:58
2911.76:135:57
3011.76:135:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.31 kWh/m².

For context, solar energy here swings from a low near 2.12 kWh/m² to a high of 5.65 kWh/m² in May across the year — September's 4.31 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.5Bright
84.5Bright
94.5Bright
104.5Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.1Bright
254.1Bright
264.1Bright
274.1Bright
284.0Bright
294.0Bright
304.0Moderate
Planning a trip in September

Hazard calendar for Mine

In seasonPeak

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

Mine sits in the Pacific typhoon belt; the season peaks July–October.

Mine's rainy season runs April–September, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Mine?

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

5.7
Sightseeing
4th-best month of the year
6.4
Beach & pool
1st-best month of the year

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

What to pack for Mine in September

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

In September, Mine sees daytime highs around 28°C and nights near 21°C. Pack light clothes. Worth having: rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Mine 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 at the nearest coast (about 32 km away) is warmest in August at about 27°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 7 to Nov 20 — about 5.5 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb14Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Refreshing
Dec18Cool

UV index in Mine 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 Mine peaks around June 20 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highModerateJun 20UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr8Very high
May8Very high
Jun10Very high
Jul9Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Mine 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 Mine is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateApr 1023 µg/m³Oct 1111 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar23Moderate
Apr23Moderate
May20Moderate
Jun16Moderate
Jul13Moderate
Aug15Moderate
Sep11Good
Oct11Good
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Mine?

Mine sits at 34.2°N, 131.2°E, 123 m above sea level, in Japan. The nearest listed city is Sanyōonoda, 18 km away.

Topography around Mine

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

Within 3 km, the terrain around Mine has significant variations in elevation — a maximum elevation change of 374 m around an average of 153 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 680 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,286 m.

The land around Mine is covered by trees (65%) within 3 km, trees (87%) within 16 km, and water (54%) and trees (38%) within 80 km.

3 km
374 m
16 km
680 m
80 km
1,286 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Sanyōonoda 18 km · Ogōri-shimogō 19 km · Onoda 21 km · Nagato 22 km · Yamaguchi 23 km · Ube 27 km · Hagi 30 km · Hōfu 36 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 Mine (34.1868°, 131.2162°, elevation 123 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).