September weather forecastHamamatsu, Japan
September
Weather in September
September unveils Hamamatsu's gradual transition towards the cooler period of the year. A trend of declining temperatures, compared to August, foretells the forthcoming autumn month. A minor enhancement in rainfall accompanies the shift in season, mandating an umbrella's presence for outdoor expeditions. The daylight duration reduces marginally, hinting at the gradual shortening of the day. Relative humidity remains almost unchanged, maintaining a balance between temperature and moisture.Temperature
The average high-temperature in Hamamatsu shows a slight dip in September, from August's moderately hot 29.2°C (84.6°F) to a still warm 25.9°C (78.6°F). Hamamatsu encounters a negligible difference from daytime peaks throughout the September nights, with a low-temperature average of 21°C (69.8°F).Humidity
In Hamamatsu, the average relative humidity in September is 77%.Rainfall
In September, in Hamamatsu, the rain falls for 17.1 days. Throughout September, 125mm (4.92") of precipitation is accumulated. In Hamamatsu, Japan, during the entire year, the rain falls for 160.9 days and collects up to 1265mm (49.8") of precipitation.Snowfall
In Hamamatsu, snow does not fall in January, March through December.Sea temperature
In September, the average sea temperature in Hamamatsu is 25.8°C (78.4°F).Note: Between 25°C (77°F) and 29°C (84.2°F), water temperature is typically considered very warm and pleasurable by everyone. Water activities at these temperatures are enjoyable for extended periods without discomfort.
Daylight
The average length of the day in September is 12h and 24min.On the first day of September, sunrise is at 05:22 and sunset at 18:15. On the last day of the month, sunrise is at 05:43 and sunset at 17:34 JST.
Sunshine
In Hamamatsu, Japan, the average sunshine in September is 8.9h.UV index
In Hamamatsu, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 5 during September translates into the following directions:
Take precautions - Protection against sun damage is advised. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Warning! Sand and water reflections boost the intensity of UV exposure.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hamamatsu, Japan
- Average high temperature in September: 25.9°C
The warmest month (with the highest average high temperature) is August (29.2°C).
The month with the lowest average high temperature is January (8.5°C).
- Average low temperature in September: 21°C
The month with the highest average low temperature is August (24.3°C).
The coldest month (with the lowest average low temperature) is January (3.2°C).
Average pressure in September
Hamamatsu, Japan
- Average pressure in September: 1013mbar
The month with the highest atmospheric pressure is November (1018.6mbar).
The month with the lowest atmospheric pressure is June (1009mbar).
Average wind speed in September
Hamamatsu, Japan
- Average wind speed in September: 13.6km/h
The windiest month (with the highest average wind speed) is January (22.9km/h).
The calmest months (with the lowest average wind speed) are July and August (12.2km/h).
Average humidity in September
Hamamatsu, Japan
- Average humidity in September: 77%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is January (65%).
Average rainfall in September
Hamamatsu, Japan
- Average rainfall in September: 125mm
The wettest month (with the highest rainfall) is July (205mm).
The driest month (with the least rainfall) is January (37mm).
Average rainfall days in September
Hamamatsu, Japan
- Average rainfall days in September: 17.1 days
The month with the highest number of rainy days is July (20.4 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in September
Hamamatsu, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (1mm).
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Hamamatsu, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature in September
Hamamatsu, Japan
- Average sea temperature in September: 25.8°C
The best month for swimming (with the highest average sea temperature) is August (26.8°C).
The coldest month (with the lowest average sea temperature) is March (15.1°C).
Average daylight in September /
Average sunshine in September
Hamamatsu, Japan
- Average daylight in September: 12h and 24min
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 54min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 6h and 0min).
Average sunshine days in September
Hamamatsu, Japan
- Average sunshine days in September: 10.4 days
The month with the most sunshine days is January (24.8 days).
The month with the least sunshine days is July (9.4 days).
Average UV index in September
Hamamatsu, Japan
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Hamamatsu, Japan
- Average cloud cover in September: 35
The month with the most cloud cover is June (Cloud cover 42).
The month with the least cloud cover is January (Cloud cover 25).
Average visibility in September
Hamamatsu, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
