Climate averages 1991–2020
Karatsu weather
in July.
A hot, very wet month: the 2nd warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Karatsu: daytime highs average 29.1°C and nights cool to about 24.1°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 260 mm of rain on roughly 15 days, which makes July a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 08 min on an average July day.
The nearest other city in this atlas is Itoshima (23 km away). In July its highs average 28.9°C, about as warm as Karatsu, with 262 mm of rain.
Among the 303 cities listed in Japan, Karatsu ranks joint 60th of 303 for the warmest July highs and 240th of 303 for the driest July (rainfall, lowest first). The mean July high of those 303 cities is 27.9°C; Karatsu is 1.2°C warmer than that mean.
From July to August, average highs rise by 1.3°C to 30.4°C, and monthly rainfall falls from 260 mm to 162 mm.
The annual picture
July 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
Karatsu climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.0°C4.5°C | 4.5°C | 76 | 11.9 | 10.210 h |
| February | 10.2°C4.6°C | 4.6°C | 80 | 10.5 | 11.011 h |
| March | 13.6°C7.1°C | 7.1°C | 124 | 11.6 | 12.012 h |
| April | 18.4°C11.0°C | 11.0°C | 134 | 11.0 | 13.013 h |
| May | 22.7°C15.6°C | 15.6°C | 143 | 10.3 | 13.914 h |
| June | 25.6°C19.8°C | 19.8°C | 277 | 14.7 | 14.314 h |
| July, selected | 29.1°C24.1°C | 24.1°C | 260 | 15.3 | 14.114 h |
| August | 30.4°C25.1°C | 25.1°C | 162 | 13.7 | 13.413 h |
| September | 27.0°C21.8°C | 21.8°C | 179 | 12.6 | 12.412 h |
| October | 22.1°C16.7°C | 16.7°C | 103 | 8.1 | 11.411 h |
| November | 16.8°C11.5°C | 11.5°C | 94 | 9.3 | 10.510 h |
| December | 11.4°C6.7°C | 6.7°C | 81 | 11.1 | 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
July in nearby cities
- Itoshima in JulyJapan · 23 kmHigh 28.9°C · Low 24.1°C · 262 mm rain
- Maebaru-chūō in JulyJapan · 25 kmHigh 28.3°C · Low 23.9°C · 262 mm rain
- Sasebo in JulyJapan · 38 kmHigh 28.6°C · Low 24.1°C · 285 mm rain
- Saga in JulyJapan · 39 kmHigh 29.0°C · Low 23.0°C · 309 mm rain
- Fukuoka in JulyJapan · 45 kmHigh 29.3°C · Low 23.6°C · 286 mm rain
- Kasuga in JulyJapan · 47 kmHigh 29.7°C · Low 23.2°C · 286 mm rain
- Tosu in JulyJapan · 51 kmHigh 29.5°C · Low 23.0°C · 334 mm rain
- Kurume in JulyJapan · 53 kmHigh 29.4°C · Low 22.7°C · 334 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 Karatsu) is explained once on the Karatsu year overview and on the Sources, method and limits page.