September weather forecast
Tsukuba, Japan

September

Weather in September

The first month of the autumn, September, is still a warm month in Tsukuba, Japan, with an average temperature varying between 19.8°C (67.6°F) and 26.9°C (80.4°F).

Temperature

In September, the average high-temperature marginally drops from a hot 31.6°C (88.9°F) in August to a warm 26.9°C (80.4°F). The nights of September anticipate an average low-temperature of 19.8°C (67.6°F).

Humidity

The average relative humidity in September in Tsukuba is 76%.

Rainfall

In September, the rain falls for 17.7 days. Throughout September, 105mm (4.13") of precipitation is accumulated. In Tsukuba, during the entire year, the rain falls for 162.4 days and collects up to 866mm (34.09") of precipitation.

Snowfall

In Tsukuba, snow does not fall in May through October.

Daylight

The average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 05:11 and sunset at 18:07. On the last day of September, sunrise is at 05:34 and sunset at 17:25 JST.

Sunshine

The average sunshine in September in Tsukuba is 7.7h.

UV index

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. The Sun's radiation is especially intense around midday; try to stay in shade during this period. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.

Frequently asked questions

What are the temperatures in Tsukuba in September?
The high-temperature, in September, in Tsukuba, records 26.9°C (80.4°F), while the low-temperature is 19.8°C (67.6°F). In August, the average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 41°C (105.8°F).
What is the average humidity in September in Tsukuba?
In September, the average relative humidity in Tsukuba is 76%.
How many days does it rain in September in Tsukuba?
In Tsukuba, in September, it is raining for 17.7 days, with typically 105mm (4.13") of accumulated precipitation.
When it does not snow in Tsukuba?
May through October are months without snowfall.
What is the average length of the day in September in Tsukuba?
In September, the average day length is 12h and 25min.
When are sunrise and sunset in September in Tsukuba?
In September, on the first day of the month, sunrise is at 05:11 and sunset at 18:07. On the last day of the month, in Tsukuba, sunrise is at 05:34 and sunset at 17:25 JST.
How many hours of sunshine does Tsukuba have in September?
The average sunshine duration in September in Tsukuba is 7.7h.
What is the UV index intensity in September in Tsukuba?
In Tsukuba, Japan, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September
Tsukuba, Japan
  • Average high temperature in September: 26.9°C

The warmest month (with the highest average high temperature) is August (31.6°C).
The month with the lowest average high temperature is January (8.1°C).

  • Average low temperature in September: 19.8°C

The month with the highest average low temperature is August (23.4°C).
The coldest month (with the lowest average low temperature) is January (0.8°C).

Average pressure in September
Tsukuba, Japan
  • Average pressure in September: 1013.7mbar

The month with the highest atmospheric pressure is November (1018.3mbar).
The month with the lowest atmospheric pressure is June (1009.3mbar).

Average wind speed in September
Tsukuba, Japan
  • Average wind speed in September: 9.2km/h

The windiest month (with the highest average wind speed) is April (11.1km/h).
The calmest month (with the lowest average wind speed) is November (8.2km/h).

Average humidity in September
Tsukuba, Japan
  • Average humidity in September: 76%

The month with the highest relative humidity is July (79%).
The month with the lowest relative humidity is January (61%).

Average rainfall in September
Tsukuba, Japan
  • Average rainfall in September: 105mm

The wettest month (with the highest rainfall) is October (117mm).
The driest months (with the least rainfall) are February and December (27mm).

Average rainfall days in September
Tsukuba, Japan
  • Average rainfall days in September: 17.7 days

The month with the highest number of rainy days is July (21.2 days).
The month with the least rainy days is January (4.8 days).

Average snowfall in September
Tsukuba, Japan
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (55mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in September
Tsukuba, Japan
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Tsukuba, Japan
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in September: 7h and 4min

The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).

Average sunshine days in September
Tsukuba, Japan
  • Average sunshine days in September: 9.5 days

The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is June (7.3 days).

Average UV index in September
Tsukuba, Japan
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover in September
Tsukuba, Japan
  • Average cloud cover in September: 41

The month with the most cloud cover is June (Cloud cover 47).
The month with the least cloud cover is January (Cloud cover 27).

Average visibility in September
Tsukuba, Japan
  • Average visibility in September: 9km

The months with the highest visibility are January, February, March, November and December (10km).
The months with the lowest visibility are April, May, June, July, August, September and October (9km).

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