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Weather in Sapporo for September 2025

Your guide to Sapporo weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Sapporo has been nearly identical to the historical average, with a temperature of 23.8 °C (showing only a slight deviation of 0.5 °C).

  • Expect cooler weather in the next days in Sapporo with the forecast suggesting a temperature of 21.4 °C, lower than the historical average.

  • In general, the average temperature in Sapporo at the beginning of September is 23.1 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 20.4 °C by the end of September.

    • Rain 🌧️

  • Sapporo in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 119.9 mm.

    • More

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

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

Average dry days
13
Dry days
Average rainy days
17
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/13°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Sapporo Weather September

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

Temperatures trend during September in Sapporo

See the weather trend as well as the moving average line

September weather in Sapporo 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
 23° /15° 5 mm 5
2 Sept. Cloudy
Cloudy
 23° /15° 1.7 mm 5
3 Sept. Sunny
Sunny
 23° /13° 0.1 mm 6
4 Sept. Sunny
Sunny
 24° /13° 0.6 mm 6
5 Sept. Patchy rain possible
Patchy rain possible
 23° /14° 2.2 mm 5
6 Sept. Sunny
Sunny
 23° /15° 5.7 mm 5
7 Sept. Sunny
Sunny
 23° /13° 1 mm 6
8 Sept. Sunny
Sunny
 23° /13° 0 mm 6
9 Sept. Patchy rain possible
Patchy rain possible
 23° /15° 0.5 mm 5
10 Sept. Sunny
Sunny
 24° /14° 0.4 mm 6
11 Sept. Cloudy
Cloudy
 24° /14° 1 mm 5
12 Sept. Overcast
Overcast
 23° /13° 1.9 mm 5
13 Sept. Patchy rain possible
Patchy rain possible
 22° /14° 1.9 mm 5
14 Sept. Moderate rain
Moderate rain
 21° /14° 6.7 mm 1.3
15 Sept. Sunny
Sunny
 26° /13° 0 mm 1.4
16 Sept. Sunny
Sunny
 25° /14° 0 mm 1.4
17 Sept. Patchy rain possible
Patchy rain possible
 23° /15° 2.2 mm 0.8
18 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 0.2 mm 4
19 Sept. Sunny
Sunny
 20° /11° 0 mm 4
20 Sept. Partly cloudy
Partly cloudy
 20° /9° 0 mm 4
21 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 1.4 mm 3
22 Sept. Patchy rain possible
Patchy rain possible
 21° /12° 0.4 mm 4
23 Sept. Sunny
Sunny
 22° /11° 0.1 mm 5
24 Sept. Patchy rain possible
Patchy rain possible
 21° /12° 0.1 mm 4
25 Sept. Moderate rain
Moderate rain
 19° /16° 8.3 mm 4
26 Sept. Moderate rain
Moderate rain
 21° /19° 19 mm 4
27 Sept. Moderate rain
Moderate rain
 23° /18° 13.5 mm 5
28 Sept. Sunny
Sunny
 20° /12° 16.4 mm 5
29 Sept. Partly cloudy
Partly cloudy
 19° /10° 0.4 mm 5
30 Sept. Sunny
Sunny
 20° /11° 11.5 mm 5
Next
Important Notice
Our weather forecast for Sapporo 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 Sapporo forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Sapporo weather in September vs August vs October

Compare September weather in Sapporo 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
Temperatures25°/17°21°/13°13°/7°
Rainfall221 mm120 mm153 mm
Wind13.5 km/h14.3 km/h15.6 km/h
Humidity85%78%76%
Rainy days28 days17 days22 days
Dry days3 days13 days9 days

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

Sapporo in September - FAQ

What are the expected maximum and minimum temperatures in Sapporo during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Sapporo during September?
Significant rainfall exceeding 119.9 mm is expected in Sapporo during September, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Sapporo during September?
The average wind speed in Sapporo during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Sapporo in September?

As you prepare for your trip to Sapporo 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 Sapporo, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Warm Clothing: Sweaters, hoodies, long pants
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Scarves: To protect you from the cold wind
    • Gloves/Mittens: Essential for cold weather
    • Warm Hats: Warm hats for insulation in cold weather
    • Umbrellas/Raincoats: For rainy days

September rainfall patterns in Sapporo

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

UV exposure in Sapporo 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 Sapporo, located at latitude 43.067 and longitude 141.35. Stay updated with localized weather information tailored for Sapporo.

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