Chiba weather in September
September is a fair month to visit Chiba: highs of 27°C (81°F) and about 211 mm (8.3 in) of rain on average. Nights average 20°C (68°F) and cloud cover 71% (NASA POWER, 2001–2025 averages). The sea averages 29°C (83°F). It is the 2nd wettest month of the year and the 3rd warmest. Compared with August, it is cooler and wetter; October brings highs of 22°C (71°F) and 246 mm (9.7 in) of rain.
Figures are long-term averages for Chiba, the largest city in Chiba. See below for other places.
Is September a good time to visit Chiba?
fair month Weather score 51/100.
September is a fair month in Chiba. The weather is usually best in Apr–May, Jul–Aug.
Does it rain a lot in Chiba in September?
Yes, it is one of the rainy months: about 211 mm (8.3 in) falls in an average September. It is the 2nd wettest month of the year.
How warm is Chiba in September?
Days average 27°C (81°F) and nights 20°C (68°F).
Chiba weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 9°C (48°F) | 1°C (33°F) | 80 mm | 66% | 8°C (46°F) | least pleasant |
| February | 10°C (50°F) | 1°C (34°F) | 75 mm | 72% | 8°C (47°F) | least pleasant |
| March | 13°C (56°F) | 4°C (40°F) | 124 mm | 71% | 10°C (50°F) | least pleasant |
| April | 18°C (65°F) | 9°C (48°F) | 135 mm | 70% | 15°C (59°F) | best |
| May | 23°C (73°F) | 14°C (57°F) | 148 mm | 72% | 20°C (68°F) | best |
| June | 26°C (78°F) | 18°C (64°F) | 185 mm | 81% | 24°C (75°F) | fair |
| July | 29°C (84°F) | 22°C (72°F) | 153 mm | 75% | 29°C (83°F) | best |
| August | 31°C (87°F) | 23°C (74°F) | 134 mm | 61% | 30°C (86°F) | best |
| September | 27°C (81°F) | 20°C (68°F) | 211 mm | 71% | 29°C (83°F) | fair |
| October | 22°C (71°F) | 15°C (58°F) | 246 mm | 73% | 23°C (73°F) | least pleasant |
| November | 17°C (62°F) | 9°C (48°F) | 120 mm | 71% | 17°C (63°F) | fair |
| December | 11°C (53°F) | 3°C (38°F) | 83 mm | 66% | 12°C (54°F) | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months
Weather across Chiba in September
Weather can differ a lot within Chiba: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Chiba | 27°C (81°F) | 20°C (68°F) | 211 mm | fair |
| Honchō | 27°C (81°F) | 20°C (68°F) | 211 mm | fair |
| Matsudo | 28°C (82°F) | 19°C (66°F) | 198 mm | fair |
| Ichikawa | 27°C (81°F) | 20°C (68°F) | 211 mm | fair |
| Kashiwa | 28°C (82°F) | 19°C (66°F) | 198 mm | fair |
| Ichihara | 27°C (81°F) | 20°C (68°F) | 211 mm | fair |
| Nagareyama | 28°C (82°F) | 19°C (66°F) | 198 mm | fair |
| Yachiyo | 27°C (81°F) | 20°C (68°F) | 211 mm | fair |
| Narashino | 27°C (81°F) | 20°C (68°F) | 211 mm | fair |
| Sakura | 27°C (81°F) | 20°C (68°F) | 211 mm | fair |
| Urayasu | 27°C (81°F) | 20°C (68°F) | 211 mm | fair |
| Noda | 28°C (82°F) | 19°C (66°F) | 198 mm | fair |