January 11° · ☂ 5 February 11° · ☂ 7 March 15° · ☂ 11 April 19° · ☂ 11 ★ May23° · ☂ 10 June 25° · ☂ 12 July 29° · ☂ 12 August 31° · ☂ 8 September 27° · ☂ 12 ★ October22° · ☂ 11 November 17° · ☂ 8 December 13° · ☂ 7 Hakone in September:hot, frequent rain Hakone, Japan · Records from 2006 to 2025. Not a forecast.
Mean high 27° Hottest day 34.4° (2019)
Mean low 21° Coldest night 13.9° (2020)
Rain days 12 days 4-19 by year
Rainfall 264mm Daylight 12.9 → 11.9 h
Hakone's 12 months i Best: May and October
1 2 3 4 5 6 7 8 9 10 11 12
Trip types Sightseeing on foot Finemuggy and storm risk
Humidity 82% 18 muggy days
Clear days 2 days 14 overcast days
Mean wind 6 km/h Rarely windy
Sunrise / sunset (15th) 05:26 / 17:52 Daylight 12.9 → 11.9 h
Hakone in September The wettest month of the year. A typhoon can halt the ropeway and mountain trains, so keep a spare day. Fog also dulls the view from the lake cruise. Check service notices before you head up.
Hakone in September ran hot: 27°C by day and 21°C at night. By midday the shade was the best seat in town. Rain fell on 12 days of the month on average. The average is 12, but individual years ran from 4 (2009) to 19 (2018).
Highs passed 30°C on 7 days on average. Not every year was typical: 2024 ran 2.8°C warmer than the mean, with highs of 30.0°C. Rain days averaged 22 mm each, so when it rained it rained properly.
Typhoons i 10 of the last 20 years had a tropical storm pass within 300 km this month.
Fitow (2007), 42 km away typhoon strength Faxai (2019), 47 km away typhoon strength Roke (2011), 75 km away typhoon strength 1 2 3 4 1 5 2 6 6 7 8 8 10 9 9 10 11 12
Date by date i Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
September 1 Wednesday 1 rain in 10 of 20 yrs 10/20 29° 23° September 2 Thursday 2 rain in 7 of 20 yrs 7/20 29° 23° September 3 Friday 3 rain in 11 of 20 yrs 11/20 29° 23° September 4 Saturday 4 rain in 12 of 20 yrs 12/20 29° 23° 1-4 rain on 50% of days 29° 23°
September 5 Sunday 5 rain in 6 of 20 yrs 6/20 29° 23° September 6 Monday 6 rain in 10 of 20 yrs 10/20 29° 23° September 7 Tuesday 7 rain in 9 of 20 yrs 9/20 29° 23° September 8 Wednesday 8 rain in 10 of 20 yrs 10/20 28° 23° September 9 Thursday 9 rain in 11 of 20 yrs 11/20 29° 23° September 10 Friday 10 rain in 3 of 20 yrs 3/20 30° 23° September 11 Saturday 11 rain in 8 of 20 yrs 8/20 28° 22° 5-11 rain on 41% of days 29° 23°
September 12 Sunday 12 rain in 7 of 20 yrs 7/20 28° 22° September 13 Monday 13 rain in 4 of 20 yrs 4/20 28° 22° September 14 Tuesday 14 rain in 7 of 20 yrs 7/20 28° 22° September 15 Wednesday 15 rain in 10 of 20 yrs 10/20 27° 22° September 16 Thursday 16 rain in 9 of 20 yrs 9/20 27° 22° September 17 Friday 17 rain in 7 of 20 yrs 7/20 28° 22° September 18 Saturday 18 rain in 13 of 20 yrs 13/20 28° 22° 12-18 rain on 41% of days 28° 22°
September 19 Sunday 19 rain in 8 of 20 yrs 8/20 27° 22° September 20 Monday 20 rain in 7 of 20 yrs 7/20 26° 21° September 21 Tuesday 21 rain in 3 of 20 yrs 3/20 26° 20° September 22 Wednesday 22 rain in 8 of 20 yrs 8/20 26° 20° September 23 Thursday 23 rain in 11 of 20 yrs 11/20 25° 20° September 24 Friday 24 rain in 6 of 20 yrs 6/20 25° 19° September 25 Saturday 25 rain in 7 of 20 yrs 7/20 25° 20° 19-25 rain on 36% of days 26° 20°
September 26 Sunday 26 rain in 6 of 20 yrs 6/20 25° 19° September 27 Monday 27 rain in 7 of 20 yrs 7/20 24° 19° September 28 Tuesday 28 rain in 6 of 20 yrs 6/20 26° 19° September 29 Wednesday 29 rain in 8 of 20 yrs 8/20 25° 19° September 30 Thursday 30 rain in 8 of 20 yrs 8/20 24° 19°
26-30 rain on 35% of days 25° 19°
1-4 rain on 50% of days 29° 23° 5-11 rain on 41% of days 29° 23° 12-18 rain on 41% of days 28° 22° 19-25 rain on 36% of days 26° 20° 26-30 rain on 35% of days 25° 19°
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
September 1 Friday 1 rain in 10 of 20 yrs 10/20 29° 23° September 2 Saturday 2 rain in 7 of 20 yrs 7/20 29° 23° 1-2 rain on 43% of days 29° 23°
September 3 Sunday 3 rain in 11 of 20 yrs 11/20 29° 23° September 4 Monday 4 rain in 12 of 20 yrs 12/20 29° 23° September 5 Tuesday 5 rain in 6 of 20 yrs 6/20 29° 23° September 6 Wednesday 6 rain in 10 of 20 yrs 10/20 29° 23° September 7 Thursday 7 rain in 9 of 20 yrs 9/20 29° 23° September 8 Friday 8 rain in 10 of 20 yrs 10/20 28° 23° September 9 Saturday 9 rain in 11 of 20 yrs 11/20 29° 23° 3-9 rain on 49% of days 29° 23°
September 10 Sunday 10 rain in 3 of 20 yrs 3/20 30° 23° September 11 Monday 11 rain in 8 of 20 yrs 8/20 28° 22° September 12 Tuesday 12 rain in 7 of 20 yrs 7/20 28° 22° September 13 Wednesday 13 rain in 4 of 20 yrs 4/20 28° 22° September 14 Thursday 14 rain in 7 of 20 yrs 7/20 28° 22° September 15 Friday 15 rain in 10 of 20 yrs 10/20 27° 22° September 16 Saturday 16 rain in 9 of 20 yrs 9/20 27° 22° 10-16 rain on 34% of days 28° 22°
September 17 Sunday 17 rain in 7 of 20 yrs 7/20 28° 22° September 18 Monday 18 rain in 13 of 20 yrs 13/20 28° 22° September 19 Tuesday 19 rain in 8 of 20 yrs 8/20 27° 22° September 20 Wednesday 20 rain in 7 of 20 yrs 7/20 26° 21° September 21 Thursday 21 rain in 3 of 20 yrs 3/20 26° 20° September 22 Friday 22 rain in 8 of 20 yrs 8/20 26° 20° September 23 Saturday 23 rain in 11 of 20 yrs 11/20 25° 20° 17-23 rain on 41% of days 27° 21°
September 24 Sunday 24 rain in 6 of 20 yrs 6/20 25° 19° September 25 Monday 25 rain in 7 of 20 yrs 7/20 25° 20° September 26 Tuesday 26 rain in 6 of 20 yrs 6/20 25° 19° September 27 Wednesday 27 rain in 7 of 20 yrs 7/20 24° 19° September 28 Thursday 28 rain in 6 of 20 yrs 6/20 26° 19° September 29 Friday 29 rain in 8 of 20 yrs 8/20 25° 19° September 30 Saturday 30 rain in 8 of 20 yrs 8/20 24° 19° 24-30 rain on 34% of days 25° 19°
1-2 rain on 43% of days 29° 23° 3-9 rain on 49% of days 29° 23° 10-16 rain on 34% of days 28° 22° 17-23 rain on 41% of days 27° 21° 24-30 rain on 34% of days 25° 19°
Tap another date to change
2006 17mm
2007 1mm
2008 23mm
2009 none
2010 none
2011 none
2012 5mm
2013 none
2014 none
2015 7mm
2016 13mm
2017 14mm
2018 4mm
2019 11mm
2020 none
2021 40mm
2022 41mm
2023 none
2024 3mm
2025 17mm
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 15° 22° 29° 36° 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 1 Wed Pick September 1
10 3 Fri Pick September 3
11 4 Sat Pick September 4
12 6 Mon Pick September 6
10 8 Wed Pick September 8
10 9 Thu Pick September 9
11 10 Fri Pick September 10
3 11 Sat Pick September 11
8 12 Sun Pick September 12
7 13 Mon Pick September 13
4 14 Tue Pick September 14
7 15 Wed Pick September 15
10 16 Thu Pick September 16
9 17 Fri Pick September 17
7 18 Sat Pick September 18
13 19 Sun Pick September 19
8 20 Mon Pick September 20
7 21 Tue Pick September 21
3 22 Wed Pick September 22
8 23 Thu Pick September 23
11 24 Fri Pick September 24
6 25 Sat Pick September 25
7 26 Sun Pick September 26
6 27 Mon Pick September 27
7 28 Tue Pick September 28
6 29 Wed Pick September 29
8 30 Thu Pick September 30
8 Dates outside your trip are dimmed.
One row per year, one cell per day. 2009 had 4 rain days, 2018 had 19.
What to pack Loose, light-colored clothes, sandals and a hat did most of the work at 27°C. Sights went in the morning, with a break in the middle of the day.
A packable rain jacket weighs almost nothing and covers 12 rain days. Leave the suede at home.
Common questions Does it rain a lot in Hakone in September? Over the past 20 years September averaged 12 rain days (1 mm or more) out of 30. Individual years ran from 4 in the driest to 19 in the wettest.
What should I wear in Hakone in September? Days averaged 27°C and nights 21°C. Pack a compact umbrella, T-shirts, sunscreen plus a hat, and insect repellent.
Is September a good time to visit Hakone? On warmth and rain days alone, Hakone's easiest months were May and October. September ranked 4 of 12.
Is Hakone humid in September? Mean relative humidity was 82%, with about 18 muggy days (dew point of 20°C or more) in the month.
Previous month Hakone in August Next month Hakone in October Whole year Hakone weather by month Where to go September By country Japan: all cities this month