Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
The arrival of September brings an average high-temperature of a still warm 25.5°C (77.9°F), closely following the temperature pattern of August. The low temperature average during September reflects a slight decrease to a still warm 23.4°C (74.1°F) from the day's peak.Humidity
In September, the average relative humidity is 78%.Rainfall
In Shimoda, in September, during 16.1 rainfall days, 159mm (6.26") of precipitation is typically accumulated. In Shimoda, during the entire year, the rain falls for 164.7 days and collects up to 1368mm (53.86") of precipitation.Snowfall
January, March through December are months without snowfall in Shimoda.Sea temperature
In Shimoda, the average seawater temperature in September is 25.7°C (78.3°F).Note: Engaging in swimming, diving, or other water activities is highly enjoyable in temperatures ranging from 25°C (77°F) to 29°C (84.2°F), without any unpleasant sensations for prolonged durations.
Daylight
In September, the average length of the day in Shimoda, Japan, is 12h and 24min.On the first day of the month, sunrise is at 05:17 and sunset at 18:11. On the last day of September, sunrise is at 05:38 and sunset at 17:30 JST.
Sunshine
In Shimoda, the average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September in Shimoda is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 6 during September translates into the following guidance:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Enhance your sun protection with tightly woven, yet airy clothing. Note! Reflective surfaces like sand and water heighten the UV radiation levels.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Shimoda?
What is the average humidity in September in Shimoda?
How many days does it rain in September in Shimoda?
When it does not snow in Shimoda?
What is the sea water temperature in September in Shimoda?
What is the average length of the day in September in Shimoda?
What time are sunrise and sunset in September in Shimoda?
How long on average sun shines in September in Shimoda?
How high is the UV index in September in Shimoda?
Average temperature in September
Shimoda, Japan
- Average high temperature in September: 25.5°C
The warmest month (with the highest average high temperature) is August (27.9°C).
The month with the lowest average high temperature is January (10.8°C).
- Average low temperature in September: 23.4°C
The month with the highest average low temperature is August (25.7°C).
The coldest month (with the lowest average low temperature) is January (7.7°C).
Average pressure in September
Shimoda, Japan
- Average pressure in September: 1012.9mbar
The month with the highest atmospheric pressure is November (1017.9mbar).
The month with the lowest atmospheric pressure is June (1009mbar).
Average wind speed in September
Shimoda, Japan
- Average wind speed in September: 20.3km/h
The windiest month (with the highest average wind speed) is January (28.9km/h).
The calmest month (with the lowest average wind speed) is August (18km/h).
Average humidity in September
Shimoda, Japan
- Average humidity in September: 78%
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is January (64%).
Average rainfall in September
Shimoda, Japan
- Average rainfall in September: 159mm
The wettest month (with the highest rainfall) is July (201mm).
The driest month (with the least rainfall) is January (49mm).
Average rainfall days in September
Shimoda, Japan
- Average rainfall days in September: 16.1 days
The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is January (8.7 days).
Average snowfall days in September
Shimoda, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature in September
Shimoda, Japan
- Average sea temperature in September: 25.7°C
The best month for swimming (with the highest average sea temperature) is August (26.3°C).
The coldest month (with the lowest average sea temperature) is February (15.3°C).
Average daylight in September /
Average sunshine in September
Shimoda, Japan
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in September
Shimoda, Japan
- Average sunshine days in September: 11.8 days
The month with the most sunshine days is January (20.1 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in September
Shimoda, Japan
- Average UV index in September: 6
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Shimoda, Japan
- Average cloud cover in September: 35
The month with the most cloud cover is June (Cloud cover 46).
The month with the least cloud cover is January (Cloud cover 26).
Average visibility in September
Shimoda, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
