Climate averages 1991–2020
Ōmura weather
in May.
A warm, wet month: the 6th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Ōmura: daytime highs average 22.2°C and nights cool to about 16.4°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 173 mm of rain on roughly 11 days, which makes May a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 50 min on an average May day.
The nearest other city in this atlas is Isahaya (12 km away). In May its highs average 21.3°C, 1.0°C cooler than Ōmura, with 197 mm of rain.
Among the 303 cities listed in Japan, Ōmura ranks joint 107th of 303 for the warmest May highs and joint 250th of 303 for the driest May (rainfall, lowest first). The mean May high of those 303 cities is 21.3°C; Ōmura is 0.9°C warmer than that mean.
From May to June, average highs rise by 2.7°C to 25.0°C, and monthly rainfall rises from 173 mm to 381 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
Ōmura climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.6°C5.7°C | 5.7°C | 63 | 7.9 | 10.210 h |
| February | 10.7°C5.9°C | 5.9°C | 85 | 8.6 | 11.011 h |
| March | 13.8°C8.3°C | 8.3°C | 131 | 11.0 | 12.012 h |
| April | 18.2°C12.1°C | 12.1°C | 150 | 10.8 | 13.013 h |
| May, selected | 22.2°C16.4°C | 16.4°C | 173 | 10.6 | 13.814 h |
| June | 25.0°C20.3°C | 20.3°C | 381 | 16.0 | 14.314 h |
| July | 28.4°C24.4°C | 24.4°C | 309 | 17.0 | 14.114 h |
| August | 29.9°C25.5°C | 25.5°C | 179 | 15.0 | 13.413 h |
| September | 27.2°C22.5°C | 22.5°C | 188 | 11.5 | 12.412 h |
| October | 22.5°C17.8°C | 17.8°C | 109 | 7.0 | 11.411 h |
| November | 17.2°C12.8°C | 12.8°C | 94 | 7.7 | 10.510 h |
| December | 12.0°C8.0°C | 8.0°C | 75 | 7.7 | 10.010 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
- Isahaya in MayJapan · 12 kmHigh 21.3°C · Low 15.8°C · 197 mm rain
- Nagasaki in MayJapan · 20 kmHigh 21.2°C · Low 16.7°C · 197 mm rain
- Sasebo in MayJapan · 35 kmHigh 22.4°C · Low 15.9°C · 149 mm rain
- Saga in MayJapan · 47 kmHigh 23.2°C · Low 14.4°C · 164 mm rain
- Ōmuta in MayJapan · 48 kmHigh 23.0°C · Low 15.0°C · 172 mm rain
- Amakusa in MayJapan · 56 kmHigh 23.3°C · Low 16.1°C · 181 mm rain
- Karatsu in MayJapan · 58 kmHigh 22.7°C · Low 15.6°C · 143 mm rain
- Kurume in MayJapan · 68 kmHigh 23.8°C · Low 13.8°C · 170 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 Ōmura) is explained once on the Ōmura year overview and on the Sources, method and limits page.