September weather forecastTomakomai, Japan
September
Weather in September
September, the first month of the autumn in Tomakomai, is still a pleasant month, with temperature in the range of an average low of 15.4°C (59.7°F) and an average high of 20.9°C (69.6°F).Temperature
The arrival of September brings an average high-temperature of an agreeable 20.9°C (69.6°F), nearly identical to August's 23.7°C (74.7°F). During the month of September, the temperature in Tomakomai, Japan, falls to an average of 15.4°C (59.7°F).Humidity
In Tomakomai, the average relative humidity in September is 80%.Rainfall
In Tomakomai, in September, during 12.4 rainfall days, 45mm (1.77") of precipitation is typically accumulated. Throughout the year, there are 119.1 rainfall days, and 428mm (16.85") of precipitation is accumulated.Snowfall
In Tomakomai, snow does not fall in May through October.Sea temperature
In Tomakomai, Japan, the average seawater temperature in September is 20.1°C (68.2°F).Note: Swimming in 20.1°C (68.2°F) is not a pleasurable activity for the majority of people. Breathing becomes increasingly challenging as water temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
In Tomakomai, Japan, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 04:58 and sunset at 18:08. On the last day of the month, sunrise is at 05:29 and sunset at 17:17 JST.
Sunshine
In September, the average sunshine in Tomakomai, Japan, is 8.3h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A typical high UV index of 4 in September suggests the following recommendations:
Undertake protective steps - Preventing sun damage is advised. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Tomakomai, Japan
- Average high temperature in September: 20.9°C
The warmest month (with the highest average high temperature) is August (23.7°C).
The month with the lowest average high temperature is January (-1.4°C).
- Average low temperature in September: 15.4°C
The month with the highest average low temperature is August (18.3°C).
The coldest month (with the lowest average low temperature) is February (-7.2°C).
Average pressure in September
Tomakomai, Japan
- Average pressure in September: 1013.6mbar
The month with the highest atmospheric pressure is November (1016.3mbar).
The month with the lowest atmospheric pressure is July (1008.8mbar).
Average wind speed in September
Tomakomai, Japan
- Average wind speed in September: 12.3km/h
The windiest month (with the highest average wind speed) is December (15.9km/h).
The calmest month (with the lowest average wind speed) is July (10.5km/h).
Average humidity in September
Tomakomai, Japan
- Average humidity in September: 80%
The month with the highest relative humidity is July (87%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in September
Tomakomai, Japan
- Average rainfall in September: 45mm
The wettest month (with the highest rainfall) is August (65mm).
The driest month (with the least rainfall) is January (17mm).
Average rainfall days in September
Tomakomai, Japan
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is July (14.8 days).
The months with the least rainy days are January and February (3.9 days).
Average snowfall in September
Tomakomai, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (119mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Tomakomai, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Tomakomai, Japan
- Average sea temperature in September: 20.1°C
The best month for swimming (with the highest average sea temperature) is August (20.8°C).
The coldest month (with the lowest average sea temperature) is March (2.8°C).
Average daylight in September /
Average sunshine in September
Tomakomai, Japan
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is May (Average sunshine: 9h and 18min).
The months with the least sunshine are January and February (Average sunshine: 4h and 0min).
Average sunshine days in September
Tomakomai, Japan
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is January (19.9 days).
The month with the least sunshine days is July (12.8 days).
Average UV index in September
Tomakomai, Japan
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Tomakomai, Japan
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is October (Cloud cover 33).
Average visibility in September
Tomakomai, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, April, September, October, November and December (10km).
The month with the lowest visibility is July (8km).
