Climate averages 1991–2020
Ishioka weather
in April.
A mild, wet month: the 7th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Ishioka: daytime highs average 17.4°C and nights cool to about 8.4°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 114 mm of rain on roughly 12 days, which makes April a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 05 min on an average April day.
The nearest other city in this atlas is Tsuchiura (11 km away). In April its highs average 17.7°C, about as warm as Ishioka, with 108 mm of rain.
Among the 303 cities listed in Japan, Ishioka ranks joint 146th of 303 for the warmest April highs and joint 87th of 303 for the driest April (rainfall, lowest first). The mean April high of those 303 cities is 16.7°C; Ishioka is 0.6°C warmer than that mean.
From April to May, average highs rise by 4.4°C to 21.8°C, and monthly rainfall rises from 114 mm to 140 mm.
The annual picture
April in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Ishioka climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.9°C-0.1°C | -0.1°C | 61 | 6.7 | 10.010 h |
| February | 8.9°C0.4°C | 0.4°C | 62 | 7.4 | 10.811 h |
| March | 12.3°C3.4°C | 3.4°C | 110 | 12.4 | 11.912 h |
| April, selected | 17.4°C8.4°C | 8.4°C | 114 | 11.9 | 13.113 h |
| May | 21.8°C13.5°C | 13.5°C | 140 | 12.5 | 14.114 h |
| June | 24.4°C17.6°C | 17.6°C | 152 | 14.9 | 14.615 h |
| July | 28.1°C21.6°C | 21.6°C | 171 | 16.1 | 14.414 h |
| August | 29.5°C23.1°C | 23.1°C | 127 | 13.6 | 13.514 h |
| September | 25.8°C20.0°C | 20.0°C | 174 | 14.5 | 12.412 h |
| October | 20.5°C14.4°C | 14.4°C | 191 | 12.4 | 11.311 h |
| November | 15.5°C8.2°C | 8.2°C | 91 | 9.5 | 10.310 h |
| December | 10.3°C2.5°C | 2.5°C | 60 | 7.4 | 9.710 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
April in nearby cities
- Tsuchiura in AprilJapan · 11 kmHigh 17.7°C · Low 8.4°C · 108 mm rain
- Tsukuba in AprilJapan · 17 kmHigh 17.7°C · Low 8.0°C · 106 mm rain
- Kasama, Japan in AprilJapan · 22 kmHigh 16.2°C · Low 6.6°C · 117 mm rain
- Mito in AprilJapan · 25 kmHigh 16.6°C · Low 7.7°C · 124 mm rain
- Ushiku in AprilJapan · 27 kmHigh 17.6°C · Low 8.3°C · 108 mm rain
- Chikusei in AprilJapan · 29 kmHigh 17.7°C · Low 7.2°C · 107 mm rain
- Ryūgasaki in AprilJapan · 32 kmHigh 17.8°C · Low 8.6°C · 108 mm rain
- Hitachi-Naka in AprilJapan · 34 kmHigh 15.9°C · Low 8.2°C · 121 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Ishioka) is explained once on the Ishioka year overview and on the Sources, method and limits page.