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Weather in Niigata for September 2025

Your guide to Niigata weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Niigata is slightly cooler than the historical average by -1.1 °C.

  • The forecast for the next days in Niigata predicts a temperature of 23.6 °C, which is cooler than the historical average.

  • In general, the average temperature in Niigata at the beginning of September is 27.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 23.6 °C by the end of September.

    • Rain 🌧️

  • Niigata experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 217.7 mm.

    • More

  • Is September a good time to visit Niigata? check out the best time to travel to Niigata page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
8
Dry days
Average rainy days
22
Rainy days
Average snowy days
0
Snow days
Average temperatures
26°/22°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Niigata Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
30°
2
Light rain shower
28°
3
Patchy rain possible
28°
4
Light rain shower
27°
5
Light rain shower
28°
6
Patchy rain possible
27°
7
Light rain shower
27°
8
Moderate rain
25°
9
Partly cloudy
28°
10
Light rain shower
28°
11
Cloudy
28°
12
Partly cloudy
29°
13
Partly cloudy
26°
14
Partly cloudy
28°
15
Patchy rain possible
27°
16
Patchy rain possible
28°
17
Moderate rain
28°
18
Heavy rain
23°
19
Moderate rain
18°
20
Partly cloudy
21°
21
Patchy rain possible
20°
22
Partly cloudy
23°
23
Partly cloudy
23°
24
Patchy rain possible
23°
25
Patchy rain possible
22°
26
Patchy rain possible
25°
27
Patchy rain possible
25°
28
Patchy rain possible
24°
29
Light rain shower
23°
30
Light rain shower
23°

Temperatures trend during September in Niigata

See the weather trend as well as the moving average line

September weather in Niigata day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 30° /24° 0.9 mm 7
2 Sept. Light rain shower
Light rain shower
 28° /24° 4.7 mm 6
3 Sept. Patchy rain possible
Patchy rain possible
 28° /23° 2.6 mm 6
4 Sept. Light rain shower
Light rain shower
 27° /22° 5.7 mm 6
5 Sept. Light rain shower
Light rain shower
 28° /23° 12.7 mm 7
6 Sept. Patchy rain possible
Patchy rain possible
 27° /23° 22.7 mm 6
7 Sept. Light rain shower
Light rain shower
 27° /22° 3.1 mm 6
8 Sept. Moderate rain
Moderate rain
 25° /22° 17.5 mm 6
9 Sept. Partly cloudy
Partly cloudy
 28° /23° 3.3 mm 6
10 Sept. Light rain shower
Light rain shower
 28° /23° 6.6 mm 6
11 Sept. Cloudy
Cloudy
 28° /24° 5.5 mm 6
12 Sept. Partly cloudy
Partly cloudy
 29° /23° 0.1 mm 6
13 Sept. Partly cloudy
Partly cloudy
 26° /23° 1.4 mm 6
14 Sept. Partly cloudy
Partly cloudy
 28° /23° 2 mm 7
15 Sept. Patchy rain possible
Patchy rain possible
 27° /23° 0.8 mm 1.6
16 Sept. Patchy rain possible
Patchy rain possible
 28° /23° 0.2 mm 1.7
17 Sept. Moderate rain
Moderate rain
 28° /24° 14.4 mm 1.3
18 Sept. Heavy rain
Heavy rain
 23° /20° 34.2 mm 0.3
19 Sept. Moderate rain
Moderate rain
 18° /16° 9 mm 4
20 Sept. Partly cloudy
Partly cloudy
 21° /17° 0.1 mm 5
21 Sept. Patchy rain possible
Patchy rain possible
 20° /18° 0.4 mm 4
22 Sept. Partly cloudy
Partly cloudy
 23° /19° 0 mm 6
23 Sept. Partly cloudy
Partly cloudy
 23° /19° 0 mm 6
24 Sept. Patchy rain possible
Patchy rain possible
 23° /20° 0.3 mm 5
25 Sept. Patchy rain possible
Patchy rain possible
 22° /20° 3.2 mm 5
26 Sept. Patchy rain possible
Patchy rain possible
 25° /22° 1.4 mm 5
27 Sept. Patchy rain possible
Patchy rain possible
 25° /21° 1.6 mm 5
28 Sept. Patchy rain possible
Patchy rain possible
 24° /20° 0.2 mm 5
29 Sept. Light rain shower
Light rain shower
 23° /20° 1 mm 5
30 Sept. Light rain shower
Light rain shower
 23° /18° 2.5 mm 5
Next
Important Notice
Our weather forecast for Niigata in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Niigata forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Niigata weather in September vs August vs October

Compare September weather in Niigata with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherPatchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Temperatures28°/24°26°/22°20°/15°
Rainfall78 mm218 mm174 mm
Wind14.3 km/h18.7 km/h23 km/h
Humidity81%77%70%
Rainy days18 days22 days24 days
Dry days13 days8 days7 days

Planning a trip to Niigata? Discover the best time to visit

Niigata in September - FAQ

What are the expected maximum and minimum temperatures in Niigata during September?
During September, expect a variety of temperatures with highs around 26° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in Niigata during September?
Significant rainfall exceeding 217.7 mm is expected in Niigata during September, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Niigata during September?
The average wind speed in Niigata during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Niigata in September?

As you prepare for your trip to Niigata in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Niigata, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Lightweight Clothing: T-shirts, blouses, shorts, skirts
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Umbrellas/Raincoats: For rainy days
  • Personal Items
    • Sunscreen: High SPF for sunny destinations
    • Lip Balm with SPF: To protect against chapped lips

September rainfall patterns in Niigata

Explore the daily rainfall trends and prepare for Niigatas September weather 💧

UV exposure in Niigata during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Get accurate weather forecasts for Niigata, located at latitude 37.886 and longitude 139.006. Stay updated with localized weather information tailored for Niigata.

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