Climate averages 1991–2020
Honmachi weather
in May.
A warm, wet month: the 5th warmest and the joint 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Honmachi: daytime highs average 23.8°C and nights cool to about 16.1°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 174 mm of rain on roughly 12 days, which makes May a wet month (the joint 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 48 min on an average May day.
The nearest other city in this atlas is Kumamoto (35 km away). In May its highs average 23.2°C, 0.6°C cooler than Honmachi, with 178 mm of rain.
Among the 303 cities listed in Japan, Honmachi ranks joint 6th of 303 for the warmest May highs and joint 253rd of 303 for the driest May (rainfall, lowest first). The mean May high of those 303 cities is 21.3°C; Honmachi is 2.4°C warmer than that mean.
From May to June, average highs rise by 2.4°C to 26.2°C, and monthly rainfall rises from 174 mm to 428 mm.
The annual picture
May 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
Honmachi climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.6°C3.2°C | 3.2°C | 73 | 9.4 | 10.310 h |
| February | 11.1°C3.8°C | 3.8°C | 92 | 10.0 | 11.011 h |
| March | 14.6°C6.9°C | 6.9°C | 133 | 12.4 | 12.012 h |
| April | 19.5°C11.4°C | 11.4°C | 151 | 11.8 | 13.013 h |
| May, selected | 23.8°C16.1°C | 16.1°C | 174 | 11.8 | 13.814 h |
| June | 26.2°C20.2°C | 20.2°C | 428 | 18.3 | 14.214 h |
| July | 29.5°C23.9°C | 23.9°C | 347 | 18.2 | 14.114 h |
| August | 30.8°C24.6°C | 24.6°C | 162 | 16.1 | 13.313 h |
| September | 27.9°C21.5°C | 21.5°C | 174 | 13.2 | 12.412 h |
| October | 23.0°C15.8°C | 15.8°C | 100 | 8.2 | 11.411 h |
| November | 17.4°C10.3°C | 10.3°C | 96 | 8.8 | 10.511 h |
| December | 11.8°C5.1°C | 5.1°C | 83 | 9.0 | 10.110 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
May in nearby cities
- Kumamoto in MayJapan · 35 kmHigh 23.2°C · Low 15.2°C · 178 mm rain
- Amakusa in MayJapan · 38 kmHigh 23.3°C · Low 16.1°C · 181 mm rain
- Ōmuta in MayJapan · 60 kmHigh 23.0°C · Low 15.0°C · 172 mm rain
- Isahaya in MayJapan · 64 kmHigh 21.3°C · Low 15.8°C · 197 mm rain
- Nagasaki in MayJapan · 72 kmHigh 21.2°C · Low 16.7°C · 197 mm rain
- Ōmura in MayJapan · 76 kmHigh 22.2°C · Low 16.4°C · 173 mm rain
- Aira in MayJapan · 81 kmHigh 23.5°C · Low 15.3°C · 205 mm rain
- Sendai, Japan in MayJapan · 82 kmHigh 23.0°C · Low 16.9°C · 205 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 Honmachi) is explained once on the Honmachi year overview and on the Sources, method and limits page.