Saga climate
Saga is warmest in August, with average highs of 30 °C, and coldest in January, when nights average 3.0 °C. June is the wettest month (350 mm) and January the driest (61 mm). Figures are 1991–2020 climate normals.
Across a full year Saga averages 1,882 mm of rain, 115 days above 25 °C and 7 days below freezing.
Japan · population 233,301 · 1991–2020 normals
Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month
- Warmest month August 30 °C
- Coldest month January 3.0 °C
- Driest month January 61 mm
- Wettest month June 350 mm
- Least cloud October 49 % cloud
- Hottest on record July 37 °C
- Coldest on record January -4.0 °C
- Warmest sea August 27 °C
What to expectSaga through the year
Saga has a clear annual cycle: average daily highs run from 9.2 °C in January to 30 °C in August, a swing of 21 °C in mean temperature across the year.
Counted across a normal year, 115 days a year reach 25 °C, 38 of them reach 30 °C, 7 nights drop below freezing. The warmest reading in the 1991–2020 record is 37 °C, in July.
Rain is strongly seasonal. June averages 350 mm against 61 mm in January — 5.7 times as much. Planning around the dry months matters more here than planning around temperature.
The sea off Saga is warmest in August at 27 °C and coldest in February at 13 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 9.2 °C | 61 mm | 66 % |
| February | 10.5 °C | 81 mm | 63 % |
| March | 13.8 °C | 128 mm | 63 % |
| April | 18.7 °C | 147 mm | 63 % |
| May | 23.2 °C | 161 mm | 67 % |
| June | 25.9 °C | 350 mm | 80 % |
| July | 29.1 °C | 308 mm | 73 % |
| August | 30.4 °C | 183 mm | 62 % |
| September | 27.2 °C | 199 mm | 59 % |
| October | 22.2 °C | 104 mm | 49 % |
| November | 16.7 °C | 91 mm | 52 % |
| December | 11.4 °C | 69 mm | 58 % |
Temperature month by month
| Month | Avg high | Avg low | Mean | Record high | Record low | Days above 25 °C | Days above 30 °C | Days below 0 °C |
|---|---|---|---|---|---|---|---|---|
| January | 9.2 °C | 3.0 °C | 5.9 °C | 18.1 °C | -4.0 °C | 0 | 0 | 3 |
| February | 10.5 °C | 3.3 °C | 6.7 °C | 21.4 °C | -4.0 °C | 0 | 0 | 3 |
| March | 13.8 °C | 5.9 °C | 9.6 °C | 22.1 °C | -2.2 °C | 0 | 0 | 0 |
| April | 18.7 °C | 10.4 °C | 14.2 °C | 27.0 °C | 1.3 °C | 0 | 0 | 0 |
| May | 23.2 °C | 14.9 °C | 18.7 °C | 32.7 °C | 6.6 °C | 8 | 0 | 0 |
| June | 25.9 °C | 19.3 °C | 22.3 °C | 33.1 °C | 12.5 °C | 19 | 1 | 0 |
| July | 29.1 °C | 23.3 °C | 25.9 °C | 37.1 °C | 16.8 °C | 29 | 13 | 0 |
| August | 30.4 °C | 24.0 °C | 26.9 °C | 36.2 °C | 17.5 °C | 30 | 19 | 0 |
| September | 27.2 °C | 20.4 °C | 23.4 °C | 34.9 °C | 12.7 °C | 23 | 5 | 0 |
| October | 22.2 °C | 14.9 °C | 18.2 °C | 30.4 °C | 5.4 °C | 5 | 0 | 0 |
| November | 16.7 °C | 9.7 °C | 13.0 °C | 24.8 °C | 1.0 °C | 0 | 0 | 0 |
| December | 11.4 °C | 4.9 °C | 8.0 °C | 23.3 °C | -2.2 °C | 0 | 0 | 1 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind | Sea temp |
|---|---|---|---|---|---|---|---|
| January | 61 mm | 8 | 10 h/day | 66 % | 71 % | 15 km/h | 14.3 °C |
| February | 81 mm | 8 | 11 h/day | 63 % | 72 % | 16 km/h | 13.2 °C |
| March | 128 mm | 11 | 12 h/day | 63 % | 74 % | 16 km/h | 14.0 °C |
| April | 147 mm | 11 | 13 h/day | 63 % | 76 % | 15 km/h | 16.1 °C |
| May | 161 mm | 10 | 14 h/day | 67 % | 78 % | 13 km/h | 18.9 °C |
| June | 350 mm | 16 | 14 h/day | 80 % | 84 % | 13 km/h | 22.0 °C |
| July | 308 mm | 18 | 14 h/day | 73 % | 86 % | 13 km/h | 25.4 °C |
| August | 183 mm | 15 | 13 h/day | 62 % | 83 % | 13 km/h | 27.3 °C |
| September | 199 mm | 12 | 12 h/day | 59 % | 81 % | 13 km/h | 26.1 °C |
| October | 104 mm | 7 | 11 h/day | 49 % | 77 % | 14 km/h | 23.0 °C |
| November | 91 mm | 8 | 10 h/day | 52 % | 75 % | 13 km/h | 19.6 °C |
| December | 69 mm | 7 | 10.0 h/day | 58 % | 72 % | 15 km/h | 16.6 °C |
Planning a trip? See the best time to visit Saga.
QuestionsCommon questions about Saga’s climate
When is the best time to visit Saga?
That depends on what you want, so the honest answer is a comparison rather than a single month. May, June, October sit closest to 20 °C on average, August is the warmest month and January the driest. The month-by-month table above has the full picture.
How hot does Saga get?
In August, the warmest month, daily highs average 30 °C. About 38 days a year pass 30 °C. The highest value in the 1991–2020 record is 37 °C.
How cold does it get in winter?
Nights average 3.0 °C in January, the coldest month. A normal year has 7 nights below freezing.
Which month is wettest in Saga?
June, averaging 350 mm over 16 days with rain. The driest month is January with 61 mm. The year as a whole averages 1,882 mm.
Are these figures a forecast?
No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Saga rather than what any particular week will bring. Individual years can differ substantially from the normal.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Data point
- 33.233°, 130.300° (the coordinates the reanalysis values are taken for)
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.