Monthly climate guide
Saitama weather in September
With highs near 27°C (80°F) and lows around 18°C (64°F), September feels warm in Saitama. Rainfall averages about 221 mm (very wet) and the sky is often cloudy. Daytime highs are 4°C cooler than August and 6°C warmer than October.
What stands out in September
- Rain is above Saitama's usual level, by about 86%.
- Only 2 months are warmer in Saitama than September.
- Humidity near 82% makes 27°C feel stickier than it sounds.
- It cools down fast from here: October is about 6°C cooler.
It's usually the wettest month of the year.
Avg high
27°C
80°F
Avg low
18°C
64°F
Rainfall
221 mm
very wet
Humidity
82%
relative
Sky
73%
cloud · often cloudy
Saitama weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 7°C / 44°F | -3°C / 27°F | 43 mm | 75% | 43% |
| February | 8°C / 46°F | -2°C / 28°F | 48 mm | 75% | 57% |
| March | 12°C / 54°F | 1°C / 33°F | 87 mm | 74% | 59% |
| April | 18°C / 64°F | 5°C / 42°F | 109 mm | 74% | 64% |
| May | 24°C / 74°F | 12°C / 53°F | 119 mm | 74% | 66% |
| June | 26°C / 78°F | 16°C / 61°F | 176 mm | 80% | 82% |
| July | 30°C / 86°F | 21°C / 69°F | 181 mm | 81% | 77% |
| August | 31°C / 88°F | 22°C / 71°F | 150 mm | 80% | 66% |
| September | 27°C / 80°F | 18°C / 64°F | 221 mm | 82% | 73% |
| October | 21°C / 70°F | 11°C / 52°F | 184 mm | 81% | 68% |
| November | 16°C / 60°F | 5°C / 41°F | 69 mm | 80% | 56% |
| December | 10°C / 49°F | 0°C / 31°F | 42 mm | 77% | 48% |
What to pack for September
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A compact umbrella or packable rain jacket
- Water-resistant shoes
- Quick-dry fabrics — it feels stickier than the temperature suggests
Is September a good time to visit Saitama?
Compare the months in the chart above to find your ideal window.
Best time to visit Saitama →Other Japan cities in September
Cite or embed this data
Writing about this destination? Copy a ready-made citation or embed a live widget — free, just keep the link.
Saitama weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/japan/saitama/september
<a href="https://weathercompare.eu/weather/japan/saitama/september">Saitama weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/japan/saitama" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Saitama weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/japan/saitama/september">Saitama weather in September</a> – WeatherCompare</p>
Saitama in September: quick answers
Is September a good time to visit Saitama?
September is one of the wetter months in Saitama, with about 221 mm of rain. You can still go: pack a rain jacket and keep plans flexible.
How warm is Saitama in September?
Average highs are about 27°C (80°F) and average lows about 18°C (64°F), based on 10 years of daily data.
Does it rain a lot in Saitama in September?
Saitama typically gets around 221 mm of rain in September — very wet. It's usually the wettest month of the year.
Figures are long-term averages for the area around Saitama (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.