January 11° · ☂ 5 February 13° · ☂ 8 March 17° · ☂ 11 April 22° · ☂ 10 May 26° · ☂ 10 June 28° · ☂ 15 July 32° · ☂ 13 August 34° · ☂ 12 September 31° · ☂ 9 ★ October26° · ☂ 6 November 19° · ☂ 7 December 13° · ☂ 7 Kumamoto in September:properly hot, Kumamoto, Japan · Records from 2006 to 2025. Not a forecast.
Mean high 31° Hottest day 36.7° (2020)
Mean low 22° Coldest night 13.9° (2011)
Rain days 9 days 3-14 by year
Rainfall 142mm Daylight 12.9 → 11.9 h
Kumamoto's 12 months i Best: October
1 2 3 4 5 6 7 8 9 10 11 12
Trip types Sightseeing on foot Finehot, muggy and storm risk
Humidity 76% 22 muggy days
Clear days 6 days 10 overcast days
Mean wind 7 km/h Rarely windy
Sunrise / sunset (15th) 06:00 / 18:24 Daylight 12.9 → 11.9 h
Kumamoto in September Typhoons are the main worry. The Fujisaki Hachimangu autumn festival runs five days in September, and the horse parade starts early on the last morning. Heat lingers, though mornings cool toward the end of the month.
Days averaged 31°C and nights 22°C. Midday was for air conditioning, a cold drink or a long lunch out of the sun. With about 9 rain days, showers were an occasional nuisance rather than the rule. Individual years ran between 3 and 14 rain days.
Highs topped 30°C on 19 days of the month on average. Mixing in indoor stops at midday made sense. September 2024 averaged 33.7°C by day, 3.1°C above the 20-year mean. Each rainy day brought about 16 mm, closer to downpours than drizzle.
Typhoons i 13 of the last 20 years had a tropical storm pass within 300 km this month.
Nanmadol (2022), 37 km away typhoon strength Namtheun (2016), 86 km away typhoon strength Shanshan (2006), 97 km away typhoon strength 1 2 3 4 1 5 6 6 7 12 8 13 9 4 10 11 12
Date by date i Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
September 1 Wednesday 1 rain in 8 of 20 yrs 8/20 32° 24° September 2 Thursday 2 rain in 7 of 20 yrs 7/20 32° 24° September 3 Friday 3 rain in 5 of 20 yrs 5/20 32° 23° September 4 Saturday 4 rain in 11 of 20 yrs 11/20 32° 23° 1-4 rain on 39% of days 32° 24°
September 5 Sunday 5 rain in 3 of 20 yrs 3/20 32° 23° September 6 Monday 6 rain in 5 of 20 yrs 5/20 32° 23° September 7 Tuesday 7 rain in 6 of 20 yrs 6/20 32° 23° September 8 Wednesday 8 rain in 3 of 20 yrs 3/20 32° 23° September 9 Thursday 9 rain in 2 of 20 yrs 2/20 32° 22° September 10 Friday 10 rain in 5 of 20 yrs 5/20 32° 22° September 11 Saturday 11 rain in 5 of 20 yrs 5/20 32° 23° 5-11 rain on 21% of days 32° 23°
September 12 Sunday 12 rain in 9 of 20 yrs 9/20 31° 23° September 13 Monday 13 rain in 7 of 20 yrs 7/20 31° 22° September 14 Tuesday 14 rain in 5 of 20 yrs 5/20 31° 23° September 15 Wednesday 15 rain in 5 of 20 yrs 5/20 31° 23° September 16 Thursday 16 rain in 9 of 20 yrs 9/20 31° 23° September 17 Friday 17 rain in 11 of 20 yrs 11/20 31° 22° September 18 Saturday 18 rain in 9 of 20 yrs 9/20 30° 22° 12-18 rain on 39% of days 31° 23°
September 19 Sunday 19 rain in 4 of 20 yrs 4/20 30° 21° September 20 Monday 20 rain in 6 of 20 yrs 6/20 29° 21° September 21 Tuesday 21 rain in 5 of 20 yrs 5/20 29° 21° September 22 Wednesday 22 rain in 9 of 20 yrs 9/20 29° 21° September 23 Thursday 23 rain in 3 of 20 yrs 3/20 30° 21° September 24 Friday 24 rain in 4 of 20 yrs 4/20 29° 20° September 25 Saturday 25 rain in 4 of 20 yrs 4/20 30° 20° 19-25 rain on 25% of days 30° 21°
September 26 Sunday 26 rain in 2 of 20 yrs 2/20 30° 20° September 27 Monday 27 rain in 6 of 20 yrs 6/20 30° 21° September 28 Tuesday 28 rain in 5 of 20 yrs 5/20 30° 21° September 29 Wednesday 29 rain in 6 of 20 yrs 6/20 29° 20° September 30 Thursday 30 rain in 7 of 20 yrs 7/20 28° 20°
26-30 rain on 26% of days 29° 20°
1-4 rain on 39% of days 32° 24° 5-11 rain on 21% of days 32° 23° 12-18 rain on 39% of days 31° 23° 19-25 rain on 25% of days 30° 21° 26-30 rain on 26% of days 29° 20°
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
September 1 Friday 1 rain in 8 of 20 yrs 8/20 32° 24° September 2 Saturday 2 rain in 7 of 20 yrs 7/20 32° 24° 1-2 rain on 38% of days 32° 24°
September 3 Sunday 3 rain in 5 of 20 yrs 5/20 32° 23° September 4 Monday 4 rain in 11 of 20 yrs 11/20 32° 23° September 5 Tuesday 5 rain in 3 of 20 yrs 3/20 32° 23° September 6 Wednesday 6 rain in 5 of 20 yrs 5/20 32° 23° September 7 Thursday 7 rain in 6 of 20 yrs 6/20 32° 23° September 8 Friday 8 rain in 3 of 20 yrs 3/20 32° 23° September 9 Saturday 9 rain in 2 of 20 yrs 2/20 32° 22° 3-9 rain on 25% of days 32° 23°
September 10 Sunday 10 rain in 5 of 20 yrs 5/20 32° 22° September 11 Monday 11 rain in 5 of 20 yrs 5/20 32° 23° September 12 Tuesday 12 rain in 9 of 20 yrs 9/20 31° 23° September 13 Wednesday 13 rain in 7 of 20 yrs 7/20 31° 22° September 14 Thursday 14 rain in 5 of 20 yrs 5/20 31° 23° September 15 Friday 15 rain in 5 of 20 yrs 5/20 31° 23° September 16 Saturday 16 rain in 9 of 20 yrs 9/20 31° 23° 10-16 rain on 32% of days 31° 23°
September 17 Sunday 17 rain in 11 of 20 yrs 11/20 31° 22° September 18 Monday 18 rain in 9 of 20 yrs 9/20 30° 22° September 19 Tuesday 19 rain in 4 of 20 yrs 4/20 30° 21° September 20 Wednesday 20 rain in 6 of 20 yrs 6/20 29° 21° September 21 Thursday 21 rain in 5 of 20 yrs 5/20 29° 21° September 22 Friday 22 rain in 9 of 20 yrs 9/20 29° 21° September 23 Saturday 23 rain in 3 of 20 yrs 3/20 30° 21° 17-23 rain on 34% of days 30° 21°
September 24 Sunday 24 rain in 4 of 20 yrs 4/20 29° 20° September 25 Monday 25 rain in 4 of 20 yrs 4/20 30° 20° September 26 Tuesday 26 rain in 2 of 20 yrs 2/20 30° 20° September 27 Wednesday 27 rain in 6 of 20 yrs 6/20 30° 21° September 28 Thursday 28 rain in 5 of 20 yrs 5/20 30° 21° September 29 Friday 29 rain in 6 of 20 yrs 6/20 29° 20° September 30 Saturday 30 rain in 7 of 20 yrs 7/20 28° 20° 24-30 rain on 24% of days 29° 20°
1-2 rain on 38% of days 32° 24° 3-9 rain on 25% of days 32° 23° 10-16 rain on 32% of days 31° 23° 17-23 rain on 34% of days 30° 21° 24-30 rain on 24% of days 29° 20°
Tap another date to change
2006 4mm
2007 3mm
2008 none
2009 none
2010 none
2011 2mm
2012 none
2013 67mm
2014 4mm
2015 none
2016 18mm
2017 3mm
2018 1mm
2019 1mm
2020 3mm
2021 none
2022 none
2023 none
2024 none
2025 26mm
Holidays in September (2027) September 18 to September 20 Respect for the Aged Day long weekendSeptember 23 Autumnal Equinox DaySeptember 6 Labor Day 1 Local public holiday or break (busier, pricier)1 US holidays (flights fill up)
Holidays in September (2028)
Day by day temperature i 19° 25° 32° 38° 1 8 15 22 29 30
Your trip dates, the past 20 years Trip dates September 1 (Wed) 2 (Thu) 3 (Fri) 4 (Sat) 5 (Sun) 6 (Mon) 7 (Tue) 8 (Wed) 9 (Thu) 10 (Fri) 11 (Sat) 12 (Sun) 13 (Mon) 14 (Tue) 15 (Wed) 16 (Thu) 17 (Fri) 18 (Sat) 19 (Sun) 20 (Mon) 21 (Tue) 22 (Wed) 23 (Thu) 24 (Fri) 25 (Sat) 26 (Sun) 27 (Mon) 28 (Tue) 29 (Wed) 30 (Thu) ~ September 1 (Wed) 2 (Thu) 3 (Fri) 4 (Sat) 5 (Sun) 6 (Mon) 7 (Tue) 8 (Wed) 9 (Thu) 10 (Fri) 11 (Sat) 12 (Sun) 13 (Mon) 14 (Tue) 15 (Wed) 16 (Thu) 17 (Fri) 18 (Sat) 19 (Sun) 20 (Mon) 21 (Tue) 22 (Wed) 23 (Thu) 24 (Fri) 25 (Sat) 26 (Sun) 27 (Mon) 28 (Tue) 29 (Wed) 30 (Thu) 1-7 8-14 15-21 22-end Whole month
You can also click two dates on the axis. Hover a cell to see that day's rain. By year Driest trips first
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Trip rain days Month rain days Tap a date to start, tap another to end. Each cell is that date in one year. '06 '07 '08 '09 '10 '11 '12 '13 '14 '15 '16 '17 '18 '19 '20 '21 '22 '23 '24 '25
of 20 4 Sat Pick September 4
11 10 Fri Pick September 10
5 11 Sat Pick September 11
5 12 Sun Pick September 12
9 13 Mon Pick September 13
7 14 Tue Pick September 14
5 15 Wed Pick September 15
5 16 Thu Pick September 16
9 17 Fri Pick September 17
11 18 Sat Pick September 18
9 19 Sun Pick September 19
4 20 Mon Pick September 20
6 21 Tue Pick September 21
5 22 Wed Pick September 22
9 23 Thu Pick September 23
3 24 Fri Pick September 24
4 25 Sat Pick September 25
4 26 Sun Pick September 26
2 27 Mon Pick September 27
6 28 Tue Pick September 28
5 29 Wed Pick September 29
6 30 Thu Pick September 30
7 Dates outside your trip are dimmed.
One row per year, one cell per day. 2007 had 3 rain days, 2016 had 14.
Kumamoto through the year What to pack At 31°C by day and 22°C at night with humid air, sweat hardly dried. Quick-dry fabrics beat heavy cotton, and a spare top saved the evening.
Most days stayed dry, yet a thin packable jacket cost nothing to carry and saved the odd soaked afternoon.
Common questions Does it rain a lot in Kumamoto in September? Over the past 20 years September averaged 9 rain days (1 mm or more) out of 30. Individual years ran from 3 in the driest to 14 in the wettest.
What should I wear in Kumamoto in September? Days averaged 31°C and nights 22°C. Pack a compact umbrella, T-shirts, sunscreen plus a hat, and insect repellent.
Is September a good time to visit Kumamoto? On warmth and rain days alone, Kumamoto's easiest month was October. September ranked 5 of 12.
Is Kumamoto humid in September? Mean relative humidity was 76%, with about 22 muggy days (dew point of 20°C or more) in the month.
Previous month Kumamoto in August Next month Kumamoto in October Whole year Kumamoto weather by month Where to go September By country Japan: all cities this month