Sapporo
September
Weather in Sapporo for September 2025
Your guide to Sapporo weather in September - trends and predictions
In general, the average temperature in Sapporo at the beginning of September is 23.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.9 °C by the end of September.
Expect significant rainfall in Sapporo during September, with an average of 17 rainy days.
Is September a good time to visit Sapporo? check out the best time to travel to Sapporo page.
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13
Dry days
17
Rainy days
0
Snow days
21°/13°
Temperatures
13 km/h
Avg max wind
81 %
Avg humidity
Sapporo in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  24° | 2  24° | 3  25° | 4 24° | 5 25° | 6 22° | 7 21° |
| 8 24° | 9  24° | 10 24° | 11  23° | 12 23° | 13  24° | 14  19° |
| 15 20° | 16 21° | 17 22° | 18 24° | 19 22° | 20 19° | 21 15° |
| 22 18° | 23 17° | 24 19° | 25 18° | 26 19° | 27 20° | 28  18° |
| 29 19° | 30 19° |
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Temperatures trend during September in Sapporo
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 24° /15° | 10.4 mm | 6 | |
| 2 Sept. | Moderate rain at times | 24° /15° | 3.3 mm | 5 | |
| 3 Sept. | Sunny | 25° /13° | 0 mm | 7 | |
| 4 Sept. | Light rain shower | 24° /12° | 1.5 mm | 6 | |
| 5 Sept. | Light rain shower | 25° /15° | 2.6 mm | 6 | |
| 6 Sept. | Moderate or heavy rain shower | 22° /16° | 14.1 mm | 5 | |
| 7 Sept. | Patchy rain possible | 21° /12° | 0.6 mm | 6 | |
| 8 Sept. | Sunny | 24° /11° | 0 mm | 7 | |
| 9 Sept. | Partly cloudy | 24° /15° | 0 mm | 6 | |
| 10 Sept. | Light rain shower | 24° /15° | 0.9 mm | 5 | |
| 11 Sept. | Overcast | 23° /15° | 1.7 mm | 5 | |
| 12 Sept. | Moderate rain at times | 23° /15° | 1.8 mm | 5 | |
| 13 Sept. | Fog | 24° /13° | 1.1 mm | 6 | |
| 14 Sept. | Moderate rain | 19° /10° | 9.4 mm | 5 | |
| 15 Sept. | Sunny | 20° /11° | 17.1 mm | 5 | |
| 16 Sept. | Overcast | 21° /10° | 0 mm | 6 | |
| 17 Sept. | Overcast | 22° /13° | 0.3 mm | 5 | |
| 18 Sept. | Fog | 24° /15° | 1.4 mm | 5 | |
| 19 Sept. | Patchy rain possible | 22° /14° | 0.2 mm | 5 | |
| 20 Sept. | Patchy rain possible | 19° /12° | 1.5 mm | 4 | |
| 21 Sept. | Patchy rain possible | 15° /9° | 0.8 mm | 4 | |
| 22 Sept. | Patchy rain possible | 18° /8° | 0.2 mm | 4 | |
| 23 Sept. | Patchy rain possible | 17° /7° | 0.5 mm | 4 | |
| 24 Sept. | Partly cloudy | 19° /7° | 0 mm | 5 | |
| 25 Sept. | Patchy rain possible | 18° /8° | 0.2 mm | 4 | |
| 26 Sept. | Patchy rain possible | 19° /11° | 3.1 mm | 4 | |
| 27 Sept. | Patchy rain possible | 20° /12° | 1.1 mm | 5 | |
| 28 Sept. | Heavy rain | 18° /13° | 32.7 mm | 4 | |
| 29 Sept. | Patchy rain possible | 19° /10° | 0.6 mm | 5 | |
| 30 Sept. | Partly cloudy | 19° /9° | 0 mm | 5 | |
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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.
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 146.9 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 13 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
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