Climate averages 1991–2020
Chiba 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 Chiba: daytime highs average 17.3°C and nights cool to about 9.8°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 138 mm of rain on roughly 13 days, which makes April a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 04 min on an average April day.
The nearest other city in this atlas is Ichihara (10 km away). In April its highs average 17.2°C, about as warm as Chiba, with 138 mm of rain.
Among the 303 cities listed in Japan, Chiba ranks joint 164th of 303 for the warmest April highs and joint 214th of 303 for the driest April (rainfall, lowest first). The mean April high of those 303 cities is 16.7°C; Chiba is 0.5°C warmer than that mean.
From April to May, average highs rise by 4.3°C to 21.6°C, and monthly rainfall rises from 138 mm to 149 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
Chiba climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.7°C1.9°C | 1.9°C | 86 | 7.8 | 10.010 h |
| February | 9.4°C2.2°C | 2.2°C | 83 | 8.8 | 10.911 h |
| March | 12.6°C5.1°C | 5.1°C | 149 | 13.0 | 11.912 h |
| April, selected | 17.3°C9.8°C | 9.8°C | 138 | 12.9 | 13.113 h |
| May | 21.6°C14.7°C | 14.7°C | 149 | 12.1 | 14.014 h |
| June | 24.5°C18.5°C | 18.5°C | 189 | 14.3 | 14.515 h |
| July | 28.2°C22.4°C | 22.4°C | 155 | 12.9 | 14.314 h |
| August | 29.6°C23.8°C | 23.8°C | 118 | 11.5 | 13.514 h |
| September | 26.1°C20.9°C | 20.9°C | 207 | 14.7 | 12.412 h |
| October | 21.0°C15.5°C | 15.5°C | 251 | 14.4 | 11.311 h |
| November | 16.0°C10.0°C | 10.0°C | 126 | 11.8 | 10.310 h |
| December | 11.1°C4.8°C | 4.8°C | 80 | 8.7 | 9.810 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
- Ichihara in AprilJapan · 10 kmHigh 17.2°C · Low 10.5°C · 138 mm rain
- Narashino in AprilJapan · 11 kmHigh 17.3°C · Low 9.3°C · 114 mm rain
- Yachiyo in AprilJapan · 15 kmHigh 17.2°C · Low 9.3°C · 114 mm rain
- Sakura in AprilJapan · 17 kmHigh 17.4°C · Low 9.5°C · 113 mm rain
- Urayasu in AprilJapan · 21 kmHigh 17.4°C · Low 9.3°C · 114 mm rain
- Kamagaya in AprilJapan · 22 kmHigh 17.5°C · Low 8.8°C · 114 mm rain
- Mobara in AprilJapan · 25 kmHigh 17.2°C · Low 10.7°C · 115 mm rain
- Inzai in AprilJapan · 26 kmHigh 17.5°C · Low 8.9°C · 113 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 Chiba) is explained once on the Chiba year overview and on the Sources, method and limits page.
Ichihara and Kisarazu lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.