Today
Sun, Jun 21
Heavy rain
21°18°
- Rain chance
- 100%
- Precip
- 70.1 mm
- Max wind
- 30 km/h
Yamagata, Japan · Tokyo time · 38.85°, 139.90°
Heavy rain today: around 70 mm expected.
Heavy rain today: around 70 mm expected.
Derived advisory — not an official warning
Current conditions · 9:00 PM local
19°C
Slight rain
Feels like 17°C
Shonai is currently seeing slight rain, with 19 °C on the thermometer. It feels close to the actual reading at 17 °C. Wind is from the ESE at 28 km/h, gusting to 66 km/h. Precipitation in the last hour measured 0.4 mm. Humidity stands at 87% with sea-level pressure near 1001 hPa.
Heavy rain · rain likely (100%) · gusts to 67 km/h
Moderate rain · rain likely (100%) · gusts to 64 km/h
Highs 26°, lows 15°. The most active day looks like Friday, when rain chances peak at 98%.
Today looks like heavy rain; temperatures run from 18 °C up to 21 °C. Rain chance peaks at 100% with around 70.1 mm possible. Gusts may reach 67 km/h from the ESE. Expect moderate rain tomorrow, between 16 °C and 18 °C. Rain chance peaks at 100% with around 27 mm possible. Gusts may reach 64 km/h from the ESE. Tuesday looks like light drizzle; temperatures run from 16 °C up to 22 °C. Rain chance peaks at 94% with around 0.5 mm possible.
Today
Sun, Jun 21
Heavy rain
21°18°
Tomorrow
Mon, Jun 22
Moderate rain
19°16°
Tuesday
Tue, Jun 23
Light drizzle
22°16°
Across Shonai right now you'll find slight rain and a temperature of 19 °C, with the apparent temperature at 17 °C. Today's forecast calls for heavy rain, topping out near 21 °C before falling back to 18 °C overnight. Winds blow mainly from the ESE around 30 km/h, with gusts up to 67 km/h. Daytime highs hold fairly steady this week, staying within 18 to 26 °C. Rain is in the picture on today, tomorrow, Friday, with roughly 108 mm expected in total across the week. Tomorrow brings moderate rain with a high of 18 °C and a 100% chance of precipitation. Sunrise comes at 04:15 and sunset at 19:08, giving 14.9 hours of daylight. Current humidity sits at 87% with pressure near 1001 hPa. Looking further out, Thursday shows overcast with a high around 26 °C, while Saturday ends the week at 24 °C. Forecast details are refreshed throughout the day as new model runs arrive, so check back for the latest figures.
32
Good
US AQI · European AQI 32
Air quality in Shonai is currently good, with a US AQI of 32 (European AQI 32). The dominant pollutant right now is ozone. Air quality is healthy; no precautions needed. Fine particulate matter (PM2.5) measures 1 µg/m³.
Soil temperatures today read surface 17.3 °C, 6 cm 19 °C, 18 cm 20 °C, 54 cm 20.6 °C. Soil moisture sits at 0-1 cm at 0.36 m³/m³, 3-9 cm at 0.37 m³/m³, 27-81 cm at 0.39 m³/m³. For wheat, the root-zone reading is above the ideal 0.2-0.35 m³/m³ band. Forecast rain (108 mm) roughly covers crop water demand (ET0 22 mm), so irrigation can likely be paused. A suitable spraying window opens around 05:00 on 2026-06-23, with winds at or below 15 km/h and no rain expected. Projected growing degree days over the next week: wheat 107, maize 68.
Weather alerts for Shonai (derived from forecast data, not official warnings): Heavy rain today: around 70 mm expected.
| Variable | Value |
|---|---|
| City | Shonai, Yamagata, Japan |
| Coordinates | 38.84846, 139.90308 |
| Elevation | 7 m |
| Timezone | Asia/Tokyo |
| Population | 20,940 |
| Observed at (local) | 9:00 PM |
| Temperature (2 m) | 19°C |
| Apparent temperature | 17°C |
| Relative humidity (2 m) | 87% |
| Dew point (2 m) | 17°C |
| Precipitation (last hour) | 0.4 mm |
| Rain | 0.4 mm |
| Showers | 0 mm |
| Snowfall | 0 cm |
| Weather code (WMO) | 61 |
| Cloud cover | 98% |
| Surface pressure | 1000 hPa |
| Sea-level pressure | 1001 hPa |
| Wind speed (10 m) | 28 km/h |
| Wind gusts (10 m) | 66 km/h |
| Wind direction (10 m) | 117° (ESE) |
| Visibility | 2.7 km |
| UV index | 0 |
| Day / night | Night |
| Today max / min | 21°C / 18°C |
| Today feels-like max / min | 21°C / 16°C |
| Today precipitation sum | 70.1 mm |
| Today rain sum | 70.1 mm |
| Today snowfall sum | 0 cm |
| Today max precip probability | 100% |
| Today max wind / gusts | 30 km/h / 67 km/h |
| Dominant wind direction | 115° (ESE) |
| Sunrise / sunset | 4:15 AM / 7:08 PM |
| Daylight duration | 14h 53m |
| Sunshine duration | 0h 00m |
| Max UV index | 2.2 |
| Reference evapotranspiration (ET₀) | 1.17 mm |
| Topsoil moisture (0–1 cm) | 0.252 m³/m³ |
| Surface soil temperature | 20°C |
| US AQI | 32 |
| European AQI | 32 |
| PM2.5 | 1 µg/m³ |
| PM10 | 1.3 µg/m³ |
| Ozone (O₃) | 79 µg/m³ |
| Nitrogen dioxide (NO₂) | 1.7 µg/m³ |
| Sulphur dioxide (SO₂) | 0.5 µg/m³ |
| Carbon monoxide (CO) | 106 µg/m³ |
| Dust | 0 µg/m³ |
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<iframe src="https://weathertomorrow.cloud/embed/city/jp/yamagata/shonai" width="320" height="180" frameborder="0" title="Shonai weather" loading="lazy"></iframe>Rain is likely in Shonai tomorrow — the chance of precipitation reaches 100%, with around 27 mm expected.
Today Shonai sees heavy rain with a high of 21 °C and a low of 18 °C.
Tomorrow's high in Shonai is forecast at 18 °C with moderate rain.
Yes, yes — gusts up to 67 km/h today.
The UV index peaks at 2 today, which is low.
The sun rises at 04:15 and sets at 19:08 local time.
Air quality is good right now, with a US AQI reading of 32.