# Odawara in September: weather

Odawara, Japan (Asia). Ten-year climatology (2015-2024), not a forecast. Page: https://beaufixe.net/en/weather/odawara/september

## Key figures

| Indicator | Value |
|---|---|
| Afternoon (mean daily max) | 26.4 °C |
| Night (mean daily min) | 21.2 °C |
| Sea (surface) | 26.4 °C |
| Rainy days (≥ 1 mm) | 15 / month |
| Relative humidity | 82 % |
| Probability of a 25 °C+ afternoon | 66 % |

## Month by month

| Month | Afternoon | Night | Sea | Rain (d) |
|---|---|---|---|---|
| January | 9.6 °C | 1.6 °C | 16.9 °C | 7 |
| February | 10.5 °C | 2.4 °C | 16.1 °C | 9 |
| March | 13.8 °C | 5.7 °C | 16.2 °C | 13 |
| April | 17.6 °C | 10 °C | 17.1 °C | 12 |
| May | 21.5 °C | 14.5 °C | 19.2 °C | 11 |
| June | 24.1 °C | 18.4 °C | 21.9 °C | 15 |
| July | 27.9 °C | 22.7 °C | 24.8 °C | 16 |
| August | 29.4 °C | 24.1 °C | 27 °C | 14 |
| September | 26.4 °C | 21.2 °C | 26.4 °C | 15 |
| October | 21.2 °C | 15.2 °C | 24 °C | 13 |
| November | 16.8 °C | 9.9 °C | 21.6 °C | 11 |
| December | 12.1 °C | 4.5 °C | 18.9 °C | 8 |

Best months : August, September, July.

## Before you go

- **Safety** : No specific restrictions. Usual precautions apply. (official advice updated 28 August 2026 — https://www.gov.uk/foreign-travel-advice/japan)
- **Entry** (British passport) : Visa issued on arrival for stays of up to 90 days. Passport valid until your return date. A 'visa on arrival' stamp is issued for up to 90 days with no advance application; a blank page is needed for the stamp; 90-day extension possible. (per the UK Foreign Office, 28 August 2026)
- **Vaccines** : hepatitis B if you are not already vaccinated; hepatitis A and Japanese encephalitis depending on activities and areas visited. Routine vaccines up to date (measles in particular).
- **Yellow fever** : No yellow fever locally, vaccine not recommended. No entry requirement.
- **Malaria** : None.
  (per the CDC, page reviewed 25 August 2026 — https://wwwnc.cdc.gov/travel/destinations/traveler/none/japan)

## Sources

Air, rain, humidity: ERA5-Land reanalysis (Copernicus) served by Open-Meteo (CC BY 4.0). Sea: NOAA OISST. Safety: FCDO (OGL v3), zones reviewed by Beau Fixe. Entry: France Diplomatie (Licence Ouverte 2.0) / FCDO. Health: CDC (public domain). Details: https://beaufixe.net/en/legal#sources

Beau Fixe — https://beaufixe.net — not a forecast; only the authorities are authoritative for safety, entry rules and health.