January 20° · ☂ 10 February 20° · ☂ 10 ★ March22° · ☂ 10 ★ April25° · ☂ 10 May 27° · ☂ 12 June 30° · ☂ 13 July 32° · ☂ 10 August 32° · ☂ 13 September 31° · ☂ 13 October 28° · ☂ 10 ★ November25° · ☂ 10 December 22° · ☂ 10 Naha in September:hot, Naha, Japan · Records from 2006 to 2025. Not a forecast.
Mean high 31° Hottest day 32.7° (2017)
Mean low 26° Coldest night 22.6° (2012)
Rain days 13 days 5-21 by year
Rainfall 232mm Daylight 12.7 → 12.0 h
Naha's 12 months i Best: March, April and November
1 2 3 4 5 6 7 8 9 10 11 12
Trip types Beach Finewarm sea, frequent rain and storm risk Sightseeing on foot Finehot, frequent rain, muggy and storm risk
Humidity 81% 29 muggy days
Clear days 9 days 8 overcast days
Mean wind 23 km/h 7 windy days
Sea temperature 29.2° 28.4-29.8° by year (last 6)
Sunrise / sunset (15th) 06:15 / 18:34 Daylight 12.7 → 12.0 h
Naha in September Typhoon season continues, so decide on sea activities by the day's conditions. Earlier sunsets take a little heat out of midsummer. Conditions for swimming tend to improve as October approaches, with typhoon risk falling.
Days averaged 31°C and nights 26°C. Midday was for air conditioning, a cold drink or a long lunch out of the sun. The gap between day and night was just 5°C, so it felt much the same around the clock. About 13 days a month saw rain, enough that a wet-weather plan was worth having. Averages hide a lot here: one year saw 5, another 21.
With 26 days above 30°C on average, most of the month felt like high summer. Wet days did not mess around: about 18 mm each, the kind of rain that drives you into a doorway.
Typhoons i 13 of the last 20 years had a tropical storm pass within 300 km this month.
Pulasan (2024), 32 km away tropical storm Trami (2018), 35 km away typhoon strength Jelawat (2012), 40 km away typhoon strength 1 2 3 4 2 5 6 6 8 7 13 8 13 9 9 10 11 12
Date by date i Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
September 1 Wednesday 1 rain in 9 of 20 yrs 9/20 31° 26° September 2 Thursday 2 rain in 9 of 20 yrs 9/20 31° 26° September 3 Friday 3 rain in 10 of 20 yrs 10/20 31° 26° September 4 Saturday 4 rain in 13 of 20 yrs 13/20 31° 26° 1-4 rain on 51% of days 31° 26°
September 5 Sunday 5 rain in 14 of 20 yrs 14/20 31° 26° September 6 Monday 6 rain in 10 of 20 yrs 10/20 31° 26° September 7 Tuesday 7 rain in 9 of 20 yrs 9/20 31° 26° September 8 Wednesday 8 rain in 6 of 20 yrs 6/20 31° 26° September 9 Thursday 9 rain in 8 of 20 yrs 8/20 31° 26° September 10 Friday 10 rain in 10 of 20 yrs 10/20 31° 26° September 11 Saturday 11 rain in 9 of 20 yrs 9/20 31° 26° 5-11 rain on 47% of days 31° 26°
September 12 Sunday 12 rain in 6 of 20 yrs 6/20 31° 26° September 13 Monday 13 rain in 10 of 20 yrs 10/20 31° 26° September 14 Tuesday 14 rain in 10 of 20 yrs 10/20 31° 26° September 15 Wednesday 15 rain in 8 of 20 yrs 8/20 31° 26° September 16 Thursday 16 rain in 9 of 20 yrs 9/20 31° 26° September 17 Friday 17 rain in 9 of 20 yrs 9/20 31° 26° September 18 Saturday 18 rain in 8 of 20 yrs 8/20 31° 26° 12-18 rain on 43% of days 31° 26°
September 19 Sunday 19 rain in 4 of 20 yrs 4/20 31° 26° September 20 Monday 20 rain in 8 of 20 yrs 8/20 31° 26° September 21 Tuesday 21 rain in 8 of 20 yrs 8/20 31° 26° September 22 Wednesday 22 rain in 7 of 20 yrs 7/20 31° 26° September 23 Thursday 23 rain in 8 of 20 yrs 8/20 30° 26° September 24 Friday 24 rain in 9 of 20 yrs 9/20 30° 25° September 25 Saturday 25 rain in 5 of 20 yrs 5/20 30° 25° 19-25 rain on 35% of days 30° 26°
September 26 Sunday 26 rain in 6 of 20 yrs 6/20 31° 26° September 27 Monday 27 rain in 7 of 20 yrs 7/20 31° 26° September 28 Tuesday 28 rain in 11 of 20 yrs 11/20 31° 26° September 29 Wednesday 29 rain in 6 of 20 yrs 6/20 31° 26° September 30 Thursday 30 rain in 6 of 20 yrs 6/20 30° 26°
26-30 rain on 36% of days 31° 26°
1-4 rain on 51% of days 31° 26° 5-11 rain on 47% of days 31° 26° 12-18 rain on 43% of days 31° 26° 19-25 rain on 35% of days 30° 26° 26-30 rain on 36% of days 31° 26°
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
September 1 Friday 1 rain in 9 of 20 yrs 9/20 31° 26° September 2 Saturday 2 rain in 9 of 20 yrs 9/20 31° 26° 1-2 rain on 45% of days 31° 26°
September 3 Sunday 3 rain in 10 of 20 yrs 10/20 31° 26° September 4 Monday 4 rain in 13 of 20 yrs 13/20 31° 26° September 5 Tuesday 5 rain in 14 of 20 yrs 14/20 31° 26° September 6 Wednesday 6 rain in 10 of 20 yrs 10/20 31° 26° September 7 Thursday 7 rain in 9 of 20 yrs 9/20 31° 26° September 8 Friday 8 rain in 6 of 20 yrs 6/20 31° 26° September 9 Saturday 9 rain in 8 of 20 yrs 8/20 31° 26° 3-9 rain on 50% of days 31° 26°
September 10 Sunday 10 rain in 10 of 20 yrs 10/20 31° 26° September 11 Monday 11 rain in 9 of 20 yrs 9/20 31° 26° September 12 Tuesday 12 rain in 6 of 20 yrs 6/20 31° 26° September 13 Wednesday 13 rain in 10 of 20 yrs 10/20 31° 26° September 14 Thursday 14 rain in 10 of 20 yrs 10/20 31° 26° September 15 Friday 15 rain in 8 of 20 yrs 8/20 31° 26° September 16 Saturday 16 rain in 9 of 20 yrs 9/20 31° 26° 10-16 rain on 44% of days 31° 26°
September 17 Sunday 17 rain in 9 of 20 yrs 9/20 31° 26° September 18 Monday 18 rain in 8 of 20 yrs 8/20 31° 26° September 19 Tuesday 19 rain in 4 of 20 yrs 4/20 31° 26° September 20 Wednesday 20 rain in 8 of 20 yrs 8/20 31° 26° September 21 Thursday 21 rain in 8 of 20 yrs 8/20 31° 26° September 22 Friday 22 rain in 7 of 20 yrs 7/20 31° 26° September 23 Saturday 23 rain in 8 of 20 yrs 8/20 30° 26° 17-23 rain on 37% of days 31° 26°
September 24 Sunday 24 rain in 9 of 20 yrs 9/20 30° 25° September 25 Monday 25 rain in 5 of 20 yrs 5/20 30° 25° September 26 Tuesday 26 rain in 6 of 20 yrs 6/20 31° 26° September 27 Wednesday 27 rain in 7 of 20 yrs 7/20 31° 26° September 28 Thursday 28 rain in 11 of 20 yrs 11/20 31° 26° September 29 Friday 29 rain in 6 of 20 yrs 6/20 31° 26° September 30 Saturday 30 rain in 6 of 20 yrs 6/20 30° 26° 24-30 rain on 36% of days 30° 26°
1-2 rain on 45% of days 31° 26° 3-9 rain on 50% of days 31° 26° 10-16 rain on 44% of days 31° 26° 17-23 rain on 37% of days 31° 26° 24-30 rain on 36% of days 30° 26°
Tap another date to change
2006 12mm
2007 none
2008 none
2009 none
2010 29mm
2011 none
2012 1mm
2013 none
2014 8mm
2015 1mm
2016 16mm
2017 1mm
2018 7mm
2019 102mm
2020 21mm
2021 11mm
2022 36mm
2023 none
2024 6mm
2025 1mm
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)
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 3 Fri Pick September 3
10 4 Sat Pick September 4
13 5 Sun Pick September 5
14 6 Mon Pick September 6
10 10 Fri Pick September 10
10 11 Sat Pick September 11
9 12 Sun Pick September 12
6 13 Mon Pick September 13
10 14 Tue Pick September 14
10 15 Wed Pick September 15
8 16 Thu Pick September 16
9 17 Fri Pick September 17
9 18 Sat Pick September 18
8 19 Sun Pick September 19
4 20 Mon Pick September 20
8 21 Tue Pick September 21
8 22 Wed Pick September 22
7 23 Thu Pick September 23
8 24 Fri Pick September 24
9 25 Sat Pick September 25
5 26 Sun Pick September 26
6 27 Mon Pick September 27
7 28 Tue Pick September 28
11 29 Wed Pick September 29
6 30 Thu Pick September 30
6 Dates outside your trip are dimmed.
One row per year, one cell per day. 2011 had 5 rain days, 2024 had 21.
Naha through the year Month High Low Rain days Rainfall Sea January 20° 15° 10 days 99mm 23° February 20° 15° 10 days 108mm 22° March Good 22° 17° 10 days 126mm 22° April Good 25° 19° 10 days 176mm 23° May 27° 22° 12 days 288mm 25° June 30° 25° 13 days 317mm 27° July 32° 27° 10 days 214mm 29° August 32° 27° 13 days 268mm 29° September 31° 26° 13 days 232mm 29° October 28° 24° 10 days 197mm 28° November Good 25° 21° 10 days 157mm 26° December 22° 17° 10 days 133mm 24°
What to pack Loose, light-colored clothes, sandals and a hat did most of the work at 31°C. Sights went in the morning, with a break in the middle of the day.
A packable rain jacket weighs almost nothing and covers 13 rain days. Leave the suede at home.
Common questions Does it rain a lot in Naha in September? Over the past 20 years September averaged 13 rain days (1 mm or more) out of 30. Individual years ran from 5 in the driest to 21 in the wettest.
What should I wear in Naha in September? Days averaged 31°C and nights 26°C. Pack an umbrella, sandals that can get wet, T-shirts, sunscreen plus a hat, a swimsuit, and insect repellent.
Can you swim in Naha in September? Sea surface temperature averaged 29.2°C in September, warm enough to stay in for a long swim. Year to year it ranged 28.4-29.8°C. Check local flags for waves and jellyfish on the day.
Is September a good time to visit Naha? On warmth and rain days alone, Naha's easiest months were March, April and November. September ranked 11 of 12.
Is Naha humid in September? Mean relative humidity was 81%, with about 29 muggy days (dew point of 20°C or more) in the month.
Previous month Naha in August Next month Naha in October Whole year Naha weather by month Where to go September By country Japan: all cities this month Compare Compare with Sapporo