September weather forecastTomamae, Japan
September
Weather in September
September, the first month of the autumn in Tomamae, is also an enjoyable month, with an average temperature varying between 14.9°C (58.8°F) and 19.5°C (67.1°F).Temperature
Tomamae's progression into September involves a gentle drop in the average high-temperature, from an agreeable 22.5°C (72.5°F) in August to a comfortable 19.5°C (67.1°F). An average nighttime temperature of 14.9°C (58.8°F) marks September.Humidity
In Tomamae, the average relative humidity in September is 78%.Rainfall
In Tomamae, in September, during 17.2 rainfall days, 86mm (3.39") of precipitation is typically accumulated. In Tomamae, during the entire year, the rain falls for 146.4 days and collects up to 837mm (32.95") of precipitation.Snowfall
In Tomamae, snow does not fall in June through September.Daylight
In Tomamae, the average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 04:56 and sunset at 18:10. On the last day of the month, sunrise is at 05:30 and sunset at 17:16 JST.
Sunshine
The average sunshine in September is 8.1h.UV index
The average daily maximum UV index in September in Tomamae is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum UV index of 4 in September translates into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Tomamae, Japan
- Average high temperature in September: 19.5°C
The warmest month (with the highest average high temperature) is August (22.5°C).
The months with the lowest average high temperature are January and February (-2.5°C).
- Average low temperature in September: 14.9°C
The month with the highest average low temperature is August (17.5°C).
The coldest month (with the lowest average low temperature) is February (-6.6°C).
Average pressure in September
Tomamae, Japan
- Average pressure in September: 1013mbar
The months with the highest atmospheric pressure are October and November (1015mbar).
The month with the lowest atmospheric pressure is July (1008.3mbar).
Average wind speed in September
Tomamae, Japan
- Average wind speed in September: 15.7km/h
The windiest month (with the highest average wind speed) is December (23.7km/h).
The calmest month (with the lowest average wind speed) is July (11.8km/h).
Average humidity in September
Tomamae, Japan
- Average humidity in September: 78%
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Tomamae, Japan
- Average rainfall in September: 86mm
The wettest month (with the highest rainfall) is August (125mm).
The driest month (with the least rainfall) is April (42mm).
Average rainfall days in September
Tomamae, Japan
- Average rainfall days in September: 17.2 days
The month with the highest number of rainy days is October (18.3 days).
The month with the least rainy days is January (2.4 days).
Average snowfall in September
Tomamae, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is December (279mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Tomamae, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (22.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Tomamae, Japan
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is August (Average sunshine: 8h and 42min).
The month with the least sunshine is January (Average sunshine: 1h and 24min).
Average sunshine days in September
Tomamae, Japan
- Average sunshine days in September: 10.3 days
The month with the most sunshine days is May (14.8 days).
The month with the least sunshine days is December (3.1 days).
Average UV index in September
Tomamae, Japan
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Tomamae, Japan
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 88).
The month with the least cloud cover is September (Cloud cover 37).
Average visibility in September
Tomamae, Japan
- Average visibility in September: 10km
The months with the highest visibility are September and October (10km).
The month with the lowest visibility is December (7km).
