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Weather Tomorrow

Shonai weather forecast

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

Current conditions in Shonai

19°C

Slight rain

Feels like 17°C

Humidity
87%
Wind
28 km/h ESE
Gusts
66 km/h
UV index
0
Visibility
2.7 km

Right now

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.

At a glance

Today

21° / 18°

Heavy rain · rain likely (100%) · gusts to 67 km/h

Tomorrow

19° / 16°

Moderate rain · rain likely (100%) · gusts to 64 km/h

Upcoming · to Saturday

26° / 15°

Highs 26°, lows 15°. The most active day looks like Friday, when rain chances peak at 98%.

Next 3 days

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°

Rain chance
100%
Precip
70.1 mm
Max wind
30 km/h

Tomorrow

Mon, Jun 22

Moderate rain

19°16°

Rain chance
100%
Precip
27 mm
Max wind
32 km/h

Tuesday

Tue, Jun 23

Light drizzle

22°16°

Rain chance
94%
Precip
0.5 mm
Max wind
15 km/h

Next 48 hours

  1. 12 AM21°86%19 km/h
  2. 1 AM20°94%19 km/h
  3. 2 AM20°98%21 km/h
  4. 3 AM21°100%22 km/h
  5. 4 AM21°100%22 km/h
  6. 5 AM20°100%25 km/h
  7. 6 AM20°100%25 km/h
  8. 7 AM20°100%29 km/h
  9. 8 AM20°100%24 km/h
  10. 9 AM20°100%24 km/h
  11. 10 AM20°100%24 km/h
  12. 11 AM20°100%23 km/h
  13. 12 PM21°100%22 km/h
  14. 1 PM20°100%22 km/h
  15. 2 PM20°100%24 km/h
  16. 3 PM20°100%24 km/h
  17. 4 PM20°100%25 km/h
  18. 5 PM20°100%24 km/h
  19. 6 PM19°100%27 km/h
  20. 7 PM19°100%27 km/h
  21. 8 PM19°100%30 km/h
  22. 9 PM19°100%28 km/h
  23. 10 PM18°100%30 km/h
  24. 11 PM18°100%30 km/h
  25. 12 AM18°100%30 km/h
  26. 1 AM18°100%30 km/h
  27. 2 AM18°100%27 km/h
  28. 3 AM18°100%28 km/h
  29. 4 AM18°100%29 km/h
  30. 5 AM18°100%27 km/h
  31. 6 AM18°100%28 km/h
  32. 7 AM18°100%27 km/h
  33. 8 AM18°100%28 km/h
  34. 9 AM18°100%30 km/h
  35. 10 AM18°100%27 km/h
  36. 11 AM19°100%25 km/h
  37. 12 PM18°100%26 km/h
  38. 1 PM18°100%27 km/h
  39. 2 PM18°100%27 km/h
  40. 3 PM18°100%27 km/h
  41. 4 PM17°100%28 km/h
  42. 5 PM17°100%29 km/h
  43. 6 PM17°98%32 km/h
  44. 7 PM16°93%31 km/h
  45. 8 PM16°85%27 km/h
  46. 9 PM16°78%21 km/h
  47. 10 PM16°71%18 km/h
  48. 11 PM16°64%14 km/h

In depth

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.

Air quality

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.

Pollutants

PM2.5
1 µg/m³
PM10
1.3 µg/m³
Ozone (O₃)
79 µg/m³
NO₂
1.7 µg/m³
SO₂
0.5 µg/m³
CO
106 µg/m³
Dust
0 µg/m³

Sun & UV

Sunrise
4:15 AM
Sunset
7:08 PM
Daylight
14h 53m
Max UV
2.2 Low

Wind

Wind
28 km/h
Gusts
66 km/h
Direction
ESE (117°)

Farming weather

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.

Topsoil moisture
0.252 m³/m³
Soil temp
20°C
ET₀ today
1.17 mm
Spray window
Unfavorable
Rain (next 7d)
107.9 mm
Wind
28 km/h
Humidity
87%

Full farming outlook for Shonai

Advisory summary

Weather alerts for Shonai (derived from forecast data, not official warnings): Heavy rain today: around 70 mm expected.

All data for Shonai
Every forecast variable for Shonai with human-readable labels
VariableValue
CityShonai, Yamagata, Japan
Coordinates38.84846, 139.90308
Elevation7 m
TimezoneAsia/Tokyo
Population20,940
Observed at (local)9:00 PM
Temperature (2 m)19°C
Apparent temperature17°C
Relative humidity (2 m)87%
Dew point (2 m)17°C
Precipitation (last hour)0.4 mm
Rain0.4 mm
Showers0 mm
Snowfall0 cm
Weather code (WMO)61
Cloud cover98%
Surface pressure1000 hPa
Sea-level pressure1001 hPa
Wind speed (10 m)28 km/h
Wind gusts (10 m)66 km/h
Wind direction (10 m)117° (ESE)
Visibility2.7 km
UV index0
Day / nightNight
Today max / min21°C / 18°C
Today feels-like max / min21°C / 16°C
Today precipitation sum70.1 mm
Today rain sum70.1 mm
Today snowfall sum0 cm
Today max precip probability100%
Today max wind / gusts30 km/h / 67 km/h
Dominant wind direction115° (ESE)
Sunrise / sunset4:15 AM / 7:08 PM
Daylight duration14h 53m
Sunshine duration0h 00m
Max UV index2.2
Reference evapotranspiration (ET₀)1.17 mm
Topsoil moisture (0–1 cm)0.252 m³/m³
Surface soil temperature20°C
US AQI32
European AQI32
PM2.51 µg/m³
PM101.3 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
Dust0 µg/m³

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Frequently asked questions

Will it rain in Shonai tomorrow?

Rain is likely in Shonai tomorrow — the chance of precipitation reaches 100%, with around 27 mm expected.

What is the temperature in Shonai today?

Today Shonai sees heavy rain with a high of 21 °C and a low of 18 °C.

How hot will it be in Shonai tomorrow?

Tomorrow's high in Shonai is forecast at 18 °C with moderate rain.

Is it windy in Shonai today?

Yes, yes — gusts up to 67 km/h today.

What is the UV index in Shonai today?

The UV index peaks at 2 today, which is low.

What time is sunrise and sunset in Shonai today?

The sun rises at 04:15 and sets at 19:08 local time.

Is the air quality in Shonai good today?

Air quality is good right now, with a US AQI reading of 32.