Shonai Arpt
Weather station · 38.8°N 139.8°E · 17 m above sea level
ICAO RJSYStation data since 1971
Record high
26.9°C
in 1984
Record low
7.5°C
in 1977
Average high
23.1°C
all years on record
1.9°C short of the record for 23 September
Today’s high 25.0°C against 26.9°C in 1984. A reading that beats it is flagged here automatically, once a second cycle confirms it.
All-time record high
40.1°C
- Date
- Thursday, 3 August 1978
- Time of day
- Not recorded. The daily archive stores the day, not the hour.
- Location
- Shonai Arpt, Japan
- Position
- 38.81°N 139.79°E · 17 m
Highest highest in available records since 1971. Source: NOAA GHCN-Daily.
All-time record low
−12.8°C
- Date
- Friday, 17 February 1978
- Time of day
- Not recorded. The daily archive stores the day, not the hour.
- Location
- Shonai Arpt, Japan
- Position
- 38.81°N 139.79°E · 17 m
Highest and lowest lowest in available records since 1971. Source: NOAA GHCN-Daily.
Where Shonai Arpt is
38.81°N 139.79°E
Records by month
Jan
14.8°
−12.7°
Feb
17.5°
−12.8°
Mar
19.1°
−9.9°
Apr
28.6°
−3.7°
May
30.4°
2.9°
Jun
31.9°
7.5°
Jul
36.1°
9.5°
Aug
40.1°
13.2°
Sep
34.4°
Recent days
| Day | High | At | Low | At |
|---|---|---|---|---|
| 2026-09-23 | 25.0°C | 04:00 UTC | 22.0°C | 00:00 UTC |
| 2026-09-22 | 19.0°C | 23:00 UTC | 17.0°C | 22:00 UTC |
Nearby stations
- Yamagata ArptJapan67.5 km
- Akita ArptJapan96.7 km
- AkitaJapan104 km
- Niigata ArptJapan111.4 km
- SendaiJapan114.4 km
- NiigataJapan118.4 km
Data sources for this page
| Figure | Source | Type |
|---|---|---|
| Right now, today so far | NOAA Aviation Weather Center (METAR) and NOAA NWS WMO bulletins (SYNOP) | Measured, station |
| All-time, monthly and on-this-day records | NOAA NCEI Global Historical Climatology Network daily (GHCN-Daily), 1971 to 2026 | Measured, station |
| Nearby stations and distances | Computed from station positions in our own database | Calculated |
