Measurements:
°C
°F
Hakone
78°F
NE 14 mph
Feels like: 82°F
Precip: 17%
World Resorts Japan Hakone Weather September Weather in Hakone

Hakone Weather: September

Average Day Temperature: 84.3°F
Average Night Temperature: 74.3°F
Sea Water Temperature: 81.7°F
Number of Sunny Days: 9 days
Sunshine Hours: 11.9 - 12.9 hours
Number of Rainy Days: 7 days
Precipitation Totals: 5.7 in

Air Temperature in September, °F

Select Year: 2026 2025 2024

The highest day temperature in September 2026 was 88°F. The lowest night temperature was 67°F. The average values for day and night temperatures during September were 76.5°F и 74.9°F respectivly.

Hakone Water Sea Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Hakone was 81.3°F. The maximum and minimum values were 79.4°F and 83.6°F respectively.

Sunny, Cloudy and Gloomy days

You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.

Precipitation Totals in September, in

Precipitation total in September for Hakone is 5.7 in. It makes september one of the most rainy months of the year.

Wind Speed in September, mph

The average wind speed in September is 7.9 mph. This value is relatively stable throughout the year.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Hakone in September is 6.4 hours.

Best Time to Visit Hakone
The most sunny months:
January 17 days
December 17 days
May 13 days
The most warm months:
August 90.8 °F
July 88.1 °F
September 84.3 °F
Warmest sea temperature:
August 83.9 °F
September 81.7 °F
July 79.8 °F
The most cold months:
January 48.7 °F
February 49.7 °F
December 54.3 °F
The most rainy months:
July 8 days
June 7 days
September 7 days
The most windy months:
April 8 mph
March 8 mph
October 7 mph

Hakone on the Weather Map

Japan Resorts:
NAME
F°
Atami +76
Fukuoka +86
Hakone +78
Hiroshima +74
Kamakura +80
Kobe +78
Kyoto +76
Nagasaki +78
Nagoya +82
Nara +78
Okinawa +86
Osaka +80
Sapporo +60
Tokyo +84
Yokohama +78
24 Hours Weather Forecast
Hakone
Local time: 14:49
19 oct, monday
1500 78°F
NE
14 mph
1800 76°F
NE
11 mph
2100 74°F
NE
8 mph
20 oct, tuesday
0000 74°F
E
7 mph
0300 74°F
E
8 mph
0600 74°F
NE
9 mph
0900 78°F
NE
12 mph
1200 82°F
NE
12 mph